The disclosure provides a motor and a motor assembling method. The motor includes a housing having a bottom and a wall portion extending from an edge of the bottom along an axial direction, and a lid connected to the housing on one side in the axial direction of the bottom of the housing. A surface on the one side in the axial direction of the bottom of the housing has a first connection surface. Housing portions on an inside and an outside in a radial direction of the first connection surface are respectively bent in opposite directions intersecting the first connection surface, which ensures sufficient working space when performing work for connecting the housing and the lid.
This disclosure provides a motor. The motor includes a housing and a lid molded by pressing. The lid includes a first wall portion extending along an axial direction. One side in the axial direction of the first wall portion is tightly fitted or loose-fitted to the housing, and the other side in the axial direction of the first wall portion is connected to an external device. This structure facilitates coaxial alignment and connection between the housing and the lid and reduces costs.
In a blower, an attachment portion is attached across radially outer surfaces of a first axial fan and a second axial fan connected in series. A portion of a third connecting portion of the attachment portion is connected to a first connecting portion of the first axial fan. Another portion of the third connecting portion is connected to a second connecting portion of the second axial fan. An extension portion of the attachment portion extends in an axial direction from the third connecting portion, and is located at a radially outer end of at least one of a first tubular portion and a second tubular portion. The extension portion surrounds at least one of a first lead wire and a second lead wire together with a radially outer end of at least one of the first tubular portion and the second tubular portion.
A position detection device includes: a first group including N (a multiple of 3) first magnetic sensors facing a magnet that rotates in synchronization with a rotation shaft of a motor and arranged at intervals along a rotation direction of the magnet, and a second group including N second magnetic sensors arranged opposite respectively to the N first magnetic sensors across the rotation shaft in a radial direction of the magnet; and a signal processing device processing output signals respectively output from the first and second magnetic sensors. The signal processing device executes averaging processing of generating N average signals by averaging an output signal of the first magnetic sensor and an output signal of the second magnetic sensor arranged at the position opposite to the first magnetic sensor across the rotation shaft, and estimation processing of estimating a rotational position of the motor based on the N average signals.
H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
D05B 19/04 - Sewing machines having electronic memory or microprocessor control unit characterised by memory aspects
H02K 29/08 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates or magneto-resistors
H02P 6/16 - Circuit arrangements for detecting position
For example, a drive motor module capable of suppressing resonance of an inverter cover due to vibration from a motor or the like is provided. A drive motor module 1 includes a motor, an inverter electrically connected to the motor, a housing that houses the motor and the inverter, and an inverter cover that has a plate shape and covers the inverter. An outer surface of an inverter cover is divided into a first region and a second region in plan view. In the first region, a plurality of first ribs arranged in parallel to each other and a connecting portion extending in a direction intersecting with the first rib and connected to one end side of each of the first ribs are provided in a protruding manner. In the second region, a plurality of second ribs that radially extend are provided in a protruding manner.
A vibration motor includes a stationary portion and a movable portion to vibrate in a central axis direction with respect to the stationary portion. The stationary portion includes a housing and a coil on an outer side in a radial direction of the movable portion. The movable portion includes a core portion including a magnet. The housing houses the movable portion and the coil, and includes a peripheral wall portion on an outer side in the radial direction of the coil and extending in an axial direction, and a magnetic portion on a portion of the peripheral wall portion and including a magnetic body. At least a portion of the magnetic portion opposes the coil in the radial direction and extends in a circumferential direction. The peripheral wall portion includes a through hole adjacent to the magnetic portion in the axial direction and extends in the circumferential direction.
H02K 33/18 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
An inverter circuit includes at least three output terminals, a first input terminal, a second input terminal, and at least three series bodies. A total switching duration and a one-phase fixed duration are present within a single cycle of AC output. The waveform of each phase of an output voltage is such that a shared offset wave is deducted from a sinusoidal waveform. The waveform of the offset wave matches one phase of the sinusoidal waveform, or matches a waveform obtained by shifting the one phase of the sinusoidal waveform in the amplitude direction, during the one-phase fixed duration. During switching between the total switching duration and the one-phase fixed duration, the inclination of the waveform of the offset wave either continuously changes or remains fixed.
H02P 27/14 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation with three or more levels of voltage
A motor includes a rotor rotatable about a central axis extending vertically, a stator radially opposed to the rotor, a circuit board located axially below the stator, a housing in which the rotor, the stator, and the circuit board are accommodated, and a resin portion located on an upper surface of a bottom plate of the housing and covering at least a portion of the stator and the circuit board. The bottom plate of the housing includes a processed portion that is in contact with at least a portion of the resin portion. A surface of the processed portion is rougher than a surface of the bottom plate excluding the processed portion.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 1/22 - Rotating parts of the magnetic circuit
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
A blower includes a first axial fan, a second axial fan, a first current plate, and a holder. The second axial fan is located on one side in the axial direction with respect to the first axial fan. In the first current plate, first hollow cells partitioned by a lattice-shaped first partition wall and penetrating in the axial direction are two-dimensionally arranged. The holder holds the first current plate. The first axial fan is connected in series with the second axial fan in the axial direction via the first current plate and the holder. The holder includes a support portion that includes opening portions opened in the axial direction and is located on one side in the axial direction of the first current plate. Rigidity of the support portion is higher than rigidity of the first current plate.
A rotor includes stacked core plates, a hole, and a magnet inserted into the hole. A holding core plate has a through hole as part of the hole, a protrusion protruding inwardly from an inner surface of the through hole and being in contact with the magnet, and a displacement permission portion located in an opposite direction to a protrusion direction of the protrusion and permitting displacement of the protrusion in the opposite direction. The rotor includes at least one of a magnet-side chamfered portion in which the front side edge portion of the magnet is chamfered or a protrusion-side chamfered portion in which the tip end edge portion of the protrusion is chamfered. A sum of lengths of the magnet-side and protrusion-side chamfered portions is equal to or longer than a length of the protrusion in the protrusion direction as the rotor is viewed from the axial direction.
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
A housing has an exhaust port and an intake port on one side and another side in a second direction, heat generators and fans arranged in a first direction, the fans on one side in the second direction of the heat generators, and an airflow restrictor between the heat generators and fans. The airflow restrictor includes a pair of guide portions arranged side by side with a first gap therebetween in the first direction. Each guide portion has an airflow guide surface facing the other side in the second direction and inclined toward the first gap. The housing includes a pair of first inner side surfaces facing each other in the first direction and a pair of second inner side surfaces facing each other in a third direction. A gap is between any one of the first inner side surfaces and the second inner side surfaces and the airflow restrictor.
An embodiment of this rotor comprises: a rotor core that extends along a central axis; and a pair of fans attached to respective end faces of the rotor core, the end faces facing both axial-direction sides of the rotor core. With regard to the fans attached to respective end faces of the rotor core, the direction in which one end face is oriented is defined as one axial side, and the direction in which the other end face is oriented is defined as the other axial side. The fans include: a plate-shaped body part having a first surface facing toward one axial side and a second surface facing toward the other axial side; and a first rib and a second rib that extend along the body part in the circumferential direction. The body part has a first through-hole and a second through-hole that are arranged side by side in the circumferential direction and that each interconnect the first and second surfaces. The first surface has a first opening section in which the first through-hole opens and a second opening section in which the second through-hole opens. The first rib is located on a rim radially outside the first opening section and projects toward the one axial side. The second rib is located on a rim radially inside the second opening section and projects radially outward.
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/02 - Arrangements for cooling or ventilating by ambient air flowing through the machine
A rotor according to one aspect of the present invention is rotatable about the central axis and comprises a rotor core and a fan disposed facing the rotor core in the axial direction. The rotor core has a ventilation hole penetrating through the rotor core in the axial direction. The fan has an opening disposed facing the ventilation hole. The rotor core is provided with a first rotation stopper. The fan is provided with a second rotation stopper that comes into contact with the first rotation stopper in the circumferential direction.
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
14.
SEMICONDUCTOR MODULE AND SEMICONDUCTOR MODULE UNIT
A semiconductor module according to one aspect of the present disclosure comprises: a first substrate; a second substrate; and a third heat dissipation member. The first substrate is provided with a first semiconductor element on one main surface thereof and is provided with a first heat dissipation member on another main surface thereof. The second substrate: is disposed to face the first substrate; is provided with a second semiconductor element on one main surface facing the one main surface of the first substrate; and is provided with a second heat dissipation member on the another main surface. At least a portion of the third heat dissipation member is sandwiched by: a first electrode provided to the main surface of the first semiconductor element facing the second semiconductor element; and a second electrode provided to the main surface of the second semiconductor element facing the first semiconductor element.
H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
A semiconductor module according to one aspect of the present disclosure comprises an insulation substrate, a conductive layer, a semiconductor element, and a lead frame. The conductive layer is laminated on the insulation substrate and an electric circuit is patterned therein. The semiconductor element is laminated to the conductive layer with a conductive first joining member therebetween. The lead frame is laminated to the semiconductor element with a conductive and heat-fusing second joining member therebetween. The lead frame electrically connects the semiconductor element and the electric circuit. The lead frame has, at an end part of a bottom surface serving as the joining surface with the second joining member, a notch that receives the second joining member.
H01L 23/48 - Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads or terminal arrangements
H01L 21/60 - Attaching leads or other conductive members, to be used for carrying current to or from the device in operation
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
16.
MOTOR CONTROL DEVICE, MOTOR MODULE, MOTOR CONTROL PROGRAM, AND MOTOR CONTROL METHOD
A motor control device according to one aspect of the present disclosure comprises: an inverter circuit having an upper arm and a lower arm in each phase of three phases; a conduction control unit that controls conduction of the upper arm and the lower arm of each phase of the three phases in the inverter circuit; and a determination unit that determines switching from a two-phase modulation scheme, in which two phases among the three phases are set as PWM phases that are PWM controlled and the remaining one phase is set as a fixed phase where either the upper arm or the lower arm is always turned on, to a 120-degree energization scheme, in which two phases among the three phases are set as energization phases and the remaining one phase is set as a non-energization phase. The conduction control unit is provided with a switching compensation unit that matches the on/off states of the upper arm and the lower arm in the energization phases of the two phases before and after the switching from the two-phase modulation scheme to the 120-degree energization scheme determined by the determination unit.
H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
One aspect of a power conversion device of the present invention comprises H-bridge circuits corresponding to respective phases of a motor, and an auxiliary circuit corresponding to at least one of the H-bridge circuits, wherein the auxiliary circuit includes: a first rectifying element and a first inductor connected in series between a first connection point and a third connection point; a second rectifying element and a second inductor connected in series between a second connection point and the third connection point; a third rectifying element and a third inductor connected in series between the first connection point and a fourth connection point; a fourth rectifying element and a fourth inductor connected in series between the second connection point and the fourth connection point; a fifth switch connected between a positive electrode of a power source and the third connection point; a fifth rectifying element having a negative electrode terminal connected to the third connection point, and a positive electrode terminal connected to a negative electrode of the power source; a sixth rectifying element having a negative electrode terminal connected to the positive electrode, and a positive electrode terminal connected to the fourth connection point; and a sixth switch connected between the negative electrode and the fourth connection point.
H02M 7/493 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
A coupling device 100 comprises a first member 10 and a coupling part 50. The first member 10 is provided with a first flow path and an attachment part 12. The coupling part 50 is provided with: a first cylinder part 60, which is provided with one end part that connects to a second cylinder part of a second member provided with a second flow path; and a placement part 70 which is disposed at the other end part of the first cylinder part 60 and which is attached to the attachment part 12. Movement of the placement part 70 with respect to the first member 10 is restricted in the axial direction AX of the first cylinder part 60. Movement of the placement part 70 with respect to the first member 10 is possible in the radial direction RA of the first cylinder part 60. The maximum outer diameter LA of the placement part 70 is less than the maximum outer diameter LB of the first cylinder part 60.
F16L 23/024 - Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
F16L 29/02 - Joints with fluid cut-off means with a cut-off device in one of the two pipe ends, the cut-off device being automatically opened when the coupling is applied
F16L 41/03 - Branch units, e.g. made in one piece, welded, riveted comprising junction pieces for four or more pipe members
19.
CONTROL DEVICE, PUMP UNIT, AND REFRIGERANT CIRCULATION DEVICE
A technology of starting power supply from an external device to a load device in a shorter period, after detection of connection between the external device and the load device, is provided. A control device includes a first connector attachable to and detachable from an external device, a power supply path to electrically connect a load device and the first connector, a load switch to switch between connection and disconnection of the power supply path, a protection circuit to protect the load switch from an inrush current to the load switch, the protection circuit including at least a capacitor, and a control circuit. The control circuit is operable to switch the load switch from disconnection to connection after a total time of a preset set time and a first time based on a charging time of the capacitor which has elapsed since connection of the first connector to the external device was detected.
A hybrid permanent magnet motor rotor rotates around a central axis, and includes: a rotor core provided with a plurality of magnet installation slots; and a plurality of magnet parts embedded inside a plurality of magnet installation slots respectively, wherein the rotor is provided with a plurality of first magnetic pole parts and a plurality of second magnetic pole parts, the magnetic poles of the first magnetic pole part and the second magnetic pole part are arranged in opposite and alternately in the circumferential direction, and the magnetic placement of the first magnetic pole part is different from that of the second magnetic pole part, the amount of magnets used in the second magnetic pole part is greater than that used in the first magnetic pole part.
Disclosed is a motor, which includes: a housing; a support plate fixed on the housing; an upper busbar holder holding the upper busbar and defined on the support plate; a lower busbar holder holding the lower busbar; one end of the upper busbar is connected to the lower busbar, and the other end of the upper busbar is connected to an external power supply; one end of the lower busbar is connected to the coil lead wire, and the other end of the lower busbar is connected to the upper busbar, the upper busbar holder has a first through-hole penetrating in the axial direction, the support plate has a second through-hole penetrating in the axial direction; the other end of the lower busbar passes through the first through-hole and the second through-hole, and is connected to one end of the upper busbar.
A rotor includes core plates, a hole, and a magnet in the hole. The core plates include a first core plate and a second core plate frontward of the first core plate. The first core plate includes a first hole, a first protrusion protruding inward of the first hole, and a first portion located in an opposite direction to a protrusion direction of the first protrusion as viewed from the axial direction and permitting deformation of the first protrusion in the opposite direction. The second core plate includes a second hole, and at least one of a recess recessed in the opposite direction and overlapping the first protrusion as viewed in the axial direction, or a second portion located in the opposite direction with respect to the first protrusion as viewed in the axial direction and permitting deformation of an inner surface of the second hole in the opposite direction.
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
23.
METHOD FOR MANUFACTURING ROTOR, ROTOR, AND IPM MOTOR HAVING SAID ROTOR
[Solution] A method for manufacturing a rotor in which a magnet is held in a rotor core. This method for manufacturing a rotor includes: a magnet insertion step for inserting the magnet inside a magnet insertion hole in the rotor core; a rotor core holding step for using a plate, which has a pin insertion hole into which a swage pin can be inserted, to cover, from a lamination direction, at least a portion of an end face in the lamination direction of the rotor core in which the magnet has been inserted, and using the plate to press the rotor core in the lamination direction; and a swage step for using the swage pin, which has been inserted into the pin insertion hole, to swage the rotor core in the lamination direction so as to hold the magnet inside the magnet insertion hole. In the rotor core holding step, the rotor core is held in a state in which a relief portion into which the plastically-deformed steel plate enters is provided between the plate and a swage surface contacted by the swage pin. In the swage step, the rotor core in the state of being held by the plate is swaged in the lamination direction by the swage pin.
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
One mode of a drive device according to the present invention comprises: a motor that includes a rotor capable of rotating about a central axis, and a stator facing the rotor in the radial direction; a sensor that is attached to the motor; an inverter that is electrically connected to the motor; and a housing that accommodates the motor and the inverter. The stator has a coil and a leader line extending from the coil toward one side in the axial direction. The inverter has a leader-line connector connected to the leader line. Included are a cable connector to which a power feeding cable extending from an external power source is connected, and a sensor connector to which a sensor wire extending from the sensor is connected. The housing includes an opening section opened outward of the central axis in the radial direction, and a through hole through which the power feeding cable passes. The opening section is disposed so as to overlap the leader-line connector, the cable connector, and the sensor connector in the radial direction of the central axis.
One aspect of this drive device comprises a motor, an inverter, and a housing. The motor has a rotor, a stator, and a bearing holder that holds a bearing. The housing includes: a cylindrical first housing member that surrounds the motor from the outside in the radial direction and houses the motor; and a second housing member that covers an opening on one axial-direction side of the first housing member, from the one axial-direction side of the first housing member. The inverter has a first substrate, a second substrate, and a sensor substrate that are positioned on one axial-direction side of the motor and that are connected to each other. The first substrate, the second substrate, and the sensor substrate are disposed in the stated order from the one axial-direction side to another axial-direction side. The first substrate and the second substrate are supported by the second housing member. The sensor substrate is supported by the bearing holder and has a rotation detection unit that detects rotation of the rotor.
One aspect of a drive device according to the present invention comprises a rotor, a stator, a housing, a bearing, and a bearing holder that is located on one side in the axial direction of the stator and that holds the bearing. The housing includes a cylindrical inner tube section centered on the central axis, and an outer tube section. A flow path section is provided between the inner tube section and the outer tube section. The bearing holder includes: a disc-shaped body section centered on the central axis; a bearing holding part that holds the bearing; a first fastening part fixed to the inner tube section; and a protruding part that protrudes toward the other side in the axial direction from the surface of the body section facing the other side in the axial direction. The protruding part extends in the circumferential direction running along an imaginary circle centered on the central axis when viewed from the axial direction, and fits to the inner circumferential surface of the inner tube section. A first through hole, through which a lead wire extending from a stator coil is passed, is provided in the body section. The first through hole is disposed on an imaginary circle when viewed from the axial direction.
A motor includes a holder, a rotor inside the holder with a shaft rotatable about a central axis, first and second bearings rotatably supporting the shaft, and a stator radially outside the holder. The holder includes a first holder, and a second holder extending upward from an upper end of the first holder. The stator is fixed to an outer peripheral surface of the first holder, and an outer ring of the first bearing is fixed to a lower end of an inner peripheral surface of the first holder. A portion of an outer ring of the second bearing is fixed to an inner peripheral surface of the second holder. The second holder is radially spaced from the stator core. A radial thickness of the second holder is less than a distance between an outer peripheral surface of the second holder and an inner peripheral surface of the stator core.
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
F16C 19/08 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
H02K 21/22 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
According to one aspect of the present invention, a plurality of heat elements, a plurality of heat sinks, at least one of which is attached to each of the heat elements, a cooling device that feeds a fluid in contact with a surface of the heat sink and promotes heat radiation of the heat sink by the fluid, and a heat pipe connected to the plurality of heat sinks are provided.
A drive apparatus includes a motor that has a motor shaft extending in an axial direction, a transmission mechanism that is connected on one side in the axial direction of the motor shaft, a lock mechanism that restricts driving of the transmission mechanism, a housing that houses the motor, the transmission mechanism, and the lock mechanism, an oil that is stored in the housing, and an oil passage that circulates the oil. The housing includes a motor room that houses the motor, a gear room that houses the transmission mechanism and the lock mechanism, and a partition that is provided between the motor room and the gear room. The oil passage includes a pump that pumps the oil in the oil passage, a first feed flow passage that feeds the oil to the motor, and a second feed flow passage that feeds the oil to the lock mechanism.
A motor includes a rotor rotatable in a circumferential direction around a center axis extending vertically, a stator to rotate the rotor, a lead wire connected to the stator, and a housing covering the rotor and the stator from a radially outer side. The housing includes a first housing located on a first side in an axial direction, and a second housing located on a second side in the axial direction. The first housing includes a wiring convex portion protruding toward the second side in the axial direction. The second housing includes a wiring recess that is recessed toward the second side in the axial direction and penetrates in a radial direction. The wiring convex portion is located in the wiring recess. The wiring convex portion includes a tip surface opposing the second side. The wiring recess includes a bottom surface opposing the first side.
An axial flux motor includes a rotor assembly and a stator assembly. The rotor assembly has magnets. The stator assembly has a circuit substrate, segmented iron cores, and a coil. The circuit substrate extends radially. The segmented iron cores are supported on the circuit substrate to be opposite to the magnet in the axial direction. Segmented iron cores arranged in the circumferential direction. A coil is sleeved on a segmented iron core. Holding seats of an insulating material correspond respectively to the segmented iron cores. A holding seat abuts with and covers a segmented iron core from both axial sides and the circumferential direction, and is used for winding the coil. The circuit substrate has slot holes. A slot hole is used for embedding and positioning a portion of a holding seat that protrudes more towards one axial side than the coil.
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 21/24 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
32.
POSITION ESTIMATION METHOD, POSITION ESTIMATION DEVICE, UNMANNED TRANSPORT VEHICLE, AND SEWING DEVICE
One aspect of a position estimation method of the present invention includes: a learning step of acquiring learning data necessary for estimation of a rotational position of a rotor on the basis of an input sensor signal; and a position estimation step of estimating the rotational position of the rotor on the basis of the input sensor signal and the learning data. The learning step is performed, thereby acquiring, as the learning data, data indicating the correspondence relationship between a segment number associated with a section included in each of a plurality of quadrants and a pole pair number representing a pole pair position. The position estimation step is performed, thereby determining an initial position of the rotor on the basis of the input sensor signal and the learning data.
H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
D05B 69/12 - Electrical or electromagnetic drives using rotary electric motors
G01D 5/245 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains using a variable number of pulses in a train
H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
33.
ROTOR, ROTARY ELECTRIC MACHINE, AND DRIVING DEVICE
The present invention provides a rotor that is rotatable around a central axis and that includes a rotor core including a plurality of magnet holes and a channel through which a coolant flows, and a plurality of magnets accommodated in the respective plurality of magnet holes. The plurality of magnet holes and the channel each extend in an axial direction. The plurality of magnets include a first magnet and a second magnet. The plurality of magnet holes include a first magnet hole accommodating the first magnet and a second magnet hole accommodating the second magnet. The first magnet is disposed further on an outer side than the second magnet in a radial direction. The channel is a hole located between the first magnet and the second magnet in the radial direction and extending in a direction intersecting the radial direction.
A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.
One embodiment of a rotor core according to the present invention is a rotor core of a rotor rotatable about the central axis, said rotor core having a pair of first magnet holes adjacent to each other in the circumferential direction and a first hole portion positioned between the pair of first magnet holes in the circumferential direction. When viewed in the axial direction, the pair of first magnet holes extend in a direction in which the pair of first magnet holes are more apart from each other in the circumferential direction as heading from the radial inside to the radial outside. When viewed in the axial direction, the first hole portion is provided at a position overlapping with a first virtual line that passes through the center between the pair of first magnet holes in the circumferential direction and extends in the radial direction, and has a shape that is asymmetrical across the first virtual line.
A drive device according to an embodiment of the present invention comprises: a motor having a rotor that is rotatable about a motor axis and a stator that surrounds the rotor from the radially outer side; and a housing having a cylindrical circumferential wall that surrounds the motor from the radially outer side and a cover that covers an opening on one axial side of the circumferential wall. The rotor has a cylindrical motor shaft that has a hollow part. The housing has a storage part that can store a fluid, a first flow channel that extends from the storage part to the cover, a second flow channel that is provided to the cover and is connected to the first flow channel, third and fourth flow channels that are connected to the second flow channel and that can supply the fluid to the stator, and a fifth flow channel that is connected to the second flow channel and that can supply the fluid to the hollow part.
One embodiment of this pump-equipped motor comprises: a rotor that can rotate around a central axis; a stator that faces the rotor with a gap therebetween; a housing that has a motor accommodation section that internally accommodates the rotor and the stator; and a pump that has an intake port and is attached to the housing. The housing has a retention unit in which a liquid is retained, a pump accommodation section that internally accommodates at least part of the pump, and a connection channel unit that links the interior of the pump accommodation section and the interior of the retention unit. The intake port is located in the interior of the pump accommodation section.
A power converter to supply power to each phase of a three-phase motor includes a booster circuit connected to a DC power supply to boost an input voltage input from the DC power supply in response to a pulse width modulation boosting signal, an inverter connected to the booster circuit and including a three-phase switching circuit including switches, and an output connected to the three-phase switching circuit to supply power to each phase of the three-phase motor, and a controller to output the pulse width modulation boosting signal to the booster circuit and output the pulse width modulation boosting signal to the booster circuit when detecting that the booster circuit is in a boosted state.
H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
H02M 3/155 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
A pump includes an upper casing, a lower casing, a can, an impeller, and a motor. The upper casing includes a suction port through which a fluid is suctioned and a discharge port through which the fluid is discharged. The lower casing is located below the upper casing. The can is accommodated in the lower casing. The impeller is accommodated in the upper casing. The motor includes a rotor and a stator connected to the impeller. The rotor is accommodated in the can. The stator is located between an inner peripheral surface of the lower casing and an outer peripheral surface of the can. The can includes a protruding portion protruding in a radial direction from the outer peripheral surface. A lower end of the protruding portion and an upper end of the stator come into contact with each other.
A vibration motor includes a stator and a vibrator that is capable of vibrating in a first direction. The stator includes a coil and a housing. The coil opposes the vibrator in a second direction perpendicular to the first direction. The housing accommodates the coil and the vibrator. The vibrator includes a mass body, a magnet, and a sliding portion. The mass body extends in the first direction. The magnet is fixed to the mass body and opposes the coil in the second direction. The sliding portion is located on an end surface of the mass body in a direction intersecting the first direction, and slides on an inner side surface of the housing when coming into contact with the inner side surface of the housing during vibration of the vibrator.
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
A drive device according to one embodiment of the present invention comprises: a motor having a rotor that rotates about a motor axis, and a stator that surrounds the rotor; a housing having a cylindrical peripheral wall part that surrounds the motor from the radially outer side of the motor axis, and a cover part that covers an opening at one axial-direction side of the peripheral wall part; a fluid that is retained in a retention part within the housing; a first supply part that supplies the fluid to the motor, the first supply part being disposed within the housing; an inverter that supplies electric power to the motor; and a busbar that electrically connects the inverter and the stator, the busbar being positioned between the stator and the cover part in the axial direction. The housing is provided with a first flow path that extends from the retention part to the cover part, and a second flow path that passes through the interior of the cover part. The second flow path has a first end section linked to the first flow path, and a second end section linked to the first supply part. The busbar is disposed between the first end section and the second end section as seen from the axial direction. The second flow path is disposed at a position different than that of the busbar as seen from the axial direction.
One embodiment of the pump-equipped motor according to the present invention comprises: a rotor rotatable about the central axis; a stator facing the rotor with a gap interposed therebetween; a housing having a motor housing portion internally housing the rotor and the stator; the pump attached to the housing; and a filter through which a liquid sent by the pump passes. The housing has: a storage portion in which the liquid is stored; a pump housing portion that internally houses at least a part of the pump; and a connection flow path portion that connects the inside of the pump housing portion and the inside of the storage portion to each other. The filter is housed in the inside of the pump housing portion.
This rotor comprises: a columnar rotor core having a plurality of core sheets and a magnet insertion hole; and a magnet inserted into the magnet insertion hole. The plurality of core sheets have first core sheets and second core sheets that are laminated adjacent to the first core sheets in a magnet insertion direction and have an insertion portion constituting part of the magnet insertion hole. The first core sheets constitute part of the inner surface of the magnet insertion hole and have a projection portion that projects toward the inside of the insertion portion when viewing the rotor from the axial direction and makes contact with the magnet. The rotor has: a housing portion that is positioned, in the first core sheets or the second core sheets, in a direction opposite to the projection direction of the projection portion with respect to the projection portion when viewing the rotor from the axial direction; and a restriction member that is housed in the housing portion at a position in the opposite direction to the projection portion and restricts the displacement of the projection portion in the opposite direction.
A tactile sensation-imparting device A comprises a plate 50, a control unit, and a motor 100. The plate 50 has a lower surface 51 that is in contact with a surface of a wearer, and an upper surface 52. The control unit outputs a control signal including a plurality of waveforms indicating a change in voltage value. The motor 100 is disposed on the upper surface 52 of the plate 10, and vibrates on the basis of the control signal. Among the plurality of waveforms, the waveform in the first cycle has the largest amplitude. It is preferable that the amplitude of the waveforms in the second and subsequent cycles be equal to or more than 0.2 times the amplitude of the waveforms in the first cycle.
B06B 1/04 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with electromagnetism
G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
45.
ROTOR, MOTOR COMPRISING SAME, AND ROTOR PRODUCTION METHOD
This rotor comprises: a cylindrical rotor core which has a plurality of core plates that are stacked in the thickness direction and a magnet insertion hole that extends in the axial direction; and a magnet which is inserted in the magnet insertion hole. The plurality of core plates include: a first core plate having a first through hole which constitutes part of the magnet insertion hole, a second through hole which is positioned to one side in the short direction of the first through hole with respect to the first through hole, and a holding part which is positioned between the first through hole and the second through hole and which holds the magnet inserted in the magnet insertion hole; and second core plate stacked in contact with the first core plate and positioned at an end part of the rotor core in the axial direction. The second core plate has a covering part which covers at least part of the holding part and the second through hole in the axial direction of the core plates. The covering part has a staking part which is recessed in the axial direction.
A cooling device includes a first surface portion thermally connected to one or more heating elements, a second surface portion opposed to the first surface portion, a flow path between the first and second surface portions and through which the cooling fluid flows, and a side wall connecting the first and second surface portions and extending along the direction in which the cooling fluid flows. A height of the side wall is reduced from the second surface portion side toward the first surface portion side at an outlet of the flow path. At least a portion of the second surface portion is missing in a portion of the side wall of which the height is reduced. A portion where the side wall is in contact with the first surface portion is superimposed on at least an entirety of the heating element closest to the outlet of the flow path.
A motor includes a bus bar assembly including a resin holder and a wire integrally provided in the resin holder. The wire is connected to an external power supply and a coil leading-out wire of the motor, the resin holder is provided with a positioning hole penetrating in an axial direction, and at least a portion of the wire is exposed from the positioning hole. The wire is integrally provided in the resin holder simply through the positioning hole, and thus the resulting bus bar assembly is low in cost and light in weight.
A vibrating motor includes a stationary portion, a movable portion to vibrate with respect to the stationary portion along a center axis extending in a vertical direction, and an elastic portion. The stationary portion includes a bearing portion supporting the movable portion to enable vibration along the center axis and having a tubular shape extending along the center axis, a coil directly or indirectly opposing at least a portion of the movable portion in a radial direction, and a housing having a tubular shape extending along the center axis. The housing houses the bearing portion, the coil, and the movable portion. The elastic portion is between the movable portion and the housing.
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
This stator comprises a stator core, an insulator, a coil, and a sensor unit. The sensor unit has a sensor disposed on the stator core through a sensor holder. The sensor holder holds the sensor. The sensor holder has a base portion, and a protruding portion. The base portion is disposed on an end surface of a tooth on one side in an axial direction, and the sensor is fixed to the base portion. The protruding portion protrudes from an end surface of the base portion on the other side in the axial direction toward the other side in the axial direction. The protruding portion engages with a periphery of a recess formed on the end surface of the tooth on the one side in the axial direction.
A rotor includes a rotor core having a hole, and a magnet inside the hole. A stator includes a stator core having an annular core back surrounding the rotor core and teeth extending inward from the core back and arranged at intervals in a circumferential direction, and coils attached to the stator core. The hole has an arc shape protruding inward. The magnet is in the hole and has an arc shape extending along the hole. The rotor core has cavity portions sandwiching the magnet. A curved outer surface of the hole is in close contact with a curved outer surface of the magnet at a portion closer to a center in the circumferential direction than an end portion in the circumferential direction. At least a part of the cavity portion extends to the outer side in the circumferential direction with respect to the center of a pole.
H02K 1/2753 - Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
One embodiment of the stator core manufacturing method of the present invention has: a punching step for forming a belt-like core piece extending in a first direction by punching a metal sheet; and a laminating step for, when defining a direction orthogonal to the first direction as a second direction, curving the belt-like core piece by setting one side of the belt-like core piece in the second direction as the inner diameter side and laminating the belt-like core piece in a spiral shape to form a laminated body. The belt-like core piece has: a core back piece that extends in the first direction and is provided with a plurality of slits aligning in the first direction at the end portion on one side in the second direction; and a plurality of tooth pieces that extend in the second direction from the end portion of the core back piece on one side or the other side in the second direction between the slits. In each zone between the slits adjacent to each other in the core back piece, the end edge on the other side in the second direction is provided with a first arc portion, and the end edge on one side in the second direction is provided with a second arc portion. The first arc portion and the second arc portion extend in a concentric arc shape about the arc center positioned on one side in the second direction with respect to the core back piece.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
52.
DRIVE DEVICE, AND METHOD FOR MANUFACTURING DRIVE DEVICE
One embodiment of a drive device of the present invention comprises: a rotary electric machine having a rotor that rotates about a center axis; a gear part that is connected to the rotary electric machine on one axial side of the rotary electric machine; a housing that accommodates the rotary electric machine and the gear part; and a fluid that circulates within the housing. The housing has: a first accommodation part that accommodates the rotary electric machine; a second accommodation part that accommodates the gear part; and a partition wall part located between the first accommodation part and the second accommodation part. Provided in the partition wall part is a through-hole that connects an internal space of the first accommodation part and an internal space of the second accommodation part. The first accommodation part has a bottom section located on the underside of the rotary electric machine. At least a portion of the bottom section radially faces the rotary electric machine, and the bottom section has a first surface and a second surface which are aligned in a circumferential direction. The first surface is located radially outside the second surface. The first surface and the second surface are each inclined radially outward toward one axial side, and are connected on an inside edge of the through-hole at one axial end thereof.
A drive device according to an aspect of the present invention comprises: a motive power transmission unit coupled to a rotary electrical machine on one side in the axial direction of the rotary electrical machine; and a housing that houses the rotary electrical machine and the motive power transmission unit. The housing has a gear cover that is positioned on one side in the axial direction of the motive power transmission unit and that supports a shaft of the motive power transmission unit. The gear cover has a dome part that projects to one side in the axial direction and that has the center at a dome axis extending in the axial direction. The dome part has a top section through which the dome axis passes, and an inclination section that expands from the top section outward in the radial direction. The inclination section is inclined more to the other side in the axial direction as the distance from the top section outward in the radial direction becomes greater. An inclination angle with respect to a surface orthogonal to the dome axis becomes larger as the distance from the top section outward in the radial direction becomes greater.
This method for manufacturing a laminated iron core comprises: a punching step for punching a steel sheet so as to form a back-yoke-forming portion that extends in one direction, and a plurality of teeth that extend from the back-yoke-forming portion in a direction that intersects the one direction as seen in the thickness direction of the steel sheet; and a bending step for bending the back-yoke-forming portion that was formed in the punching step in an arc as seen in the thickness direction, so as to form a back yoke portion. In the punching step, a pair of protrusions are formed at tip portions of the plurality of teeth, said pair of protrusions respectively protruding toward one side and the other side in the width direction of the teeth, and, as seen in the thickness direction of the steel sheet, and a recess is formed in a portion of the plurality of teeth, in which portion the size of a gap between teeth that are positioned adjacent to each other is smaller than the size of the pair of protrusions in the width direction, said recess having a depressed region that is recessed in the width direction and is bigger than said protrusions.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
55.
SIGNAL GENERATION DEVICE AND SIGNAL GENERATION METHOD
The present invention comprises a rotor that is capable of rotating about a central axis, a stator that is disposed radially facing the rotor with a gap interposed therebetween, and a housing. The housing has a rotary electric machine accommodation unit that accommodates the rotor and the stator. The rotary electric machine accommodation unit has a peripheral wall part that radially surrounds the stator and a plurality of fixed parts to which the stator is fixed. The plurality of fixed parts include a first fixed part and a second fixed part that are adjacent to each other in the circumferential direction. The peripheral wall part is provided with: a first projection that surrounds the radial-direction outer side of the first fixed part, projects radially outward, and extends in the axial direction; a second projection that surrounds the radial-direction outer side of the second fixed part, projects radially outward, and extends in the axial direction; and a first side wall protrusion that projects radially outward to expand an internal space within the rotary electric machine accommodation unit radially outward and extends in the axial direction. The first side wall protrusion is positioned between the first projection and the second projection in the circumferential direction.
A cooling assembly includes a radiator, a pump and a casing. The radiator includes a plurality of refrigerant flow paths and a plurality of ventilation paths. The radiator is operable to cool a refrigerant circulating in the plurality of refrigerant flow paths with air flowing through the plurality of ventilation paths. The pump is connected to the radiator to pressurize the refrigerant. The casing accommodates the radiator and the pump. The radiator is inclined with respect to a first surface of the casing. At least a portion of the pump is positioned between the radiator and the first surface.
The present invention comprises: a motor having a rotor that is rotatable around a first axis; a gear part that transmits the power of the motor to an output shaft extending along a second axis parallel with the first axis; a housing that accommodates the motor and the gear part therein; and a holding part that rotatably holds the output shaft. The housing and the holding part are different portions of a single member. The housing has a first hole part through which the output shaft passes. The holding part has: a first flange part located closer to one axial side than the first hole part is and closer to the other axial side than the end part of the housing on the one axial side is, extending from the outside surface of the holding part to the radially outer side, and connecting to the outside surface of the housing; and a second hole part through which the output shaft passes. The first hole part and the second hole part face each other in the axial direction.
In one embodiment, an angle detection device of the present invention includes a sensor magnet attached to a rotating shaft of an N-phase motor (N is an integer of 3 or more) having a rotor magnet, M (M is an integer of 3 or more) magnetic sensors that detect changes in magnetic flux due to rotation of the sensor magnet, a storage device that stores a relational expression expressing the relationship between the output values of the M magnetic sensors and the mechanical angle of the rotating shaft, and a mechanical angle, which corresponds to at least one rotational position of the rotor magnet, as a level switching angle, and a processing device that calculates the mechanical angle on the basis of the output value and the relational expression and outputs N-phase pulse signals having a 360/N degree phase difference in electrical angle on the basis of the calculated value of the mechanical angle and the level switching angle, wherein the processing device switches the level of the pulse signal of any one phase of the N-phase pulse signals when the calculated value of the mechanical angle matches the level switching angle.
G01D 5/244 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains
A housing of this motor has a bearing holder for holding a bearing that rotatably supports a shaft. A magnet axially faces one axial end of the shaft, which is made of a magnetic material. A yoke is made of a magnetic material, and at least a portion of the yoke is disposed on one side of the magnet in the axial direction. A first contact portion of the housing is disposed radially outward relative to the magnet, and contacts at least a portion of the other axial end surface of the yoke. A second contact portion contacts at least a portion of one axial end surface of the yoke.
H02K 5/167 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
This motor comprises a rotor, a stator, a housing, an acceleration sensor, and a control unit. The rotor is rotatable about the central axis extending in the axial direction. The stator drives the rotor. The housing accommodates the rotor and the stator. The acceleration sensor detects an acceleration applied to the housing. The control unit controls electric conduction to the stator. The control unit performs a rotation speed change which is any one of: starting of rotation of the rotor; increasing and/or decreasing of the rotation speed of the rotor; and stopping of rotation of the rotor.
A41D 13/002 - Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
A41D 13/005 - Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
A cooling device, according to one embodiment of the present disclosure, is for cooling heating elements, and comprises: a housing; a first flow path; and a second flow path. The housing has an inflow port and an outflow port for a refrigerant, and includes a first region which is in contact with a first heating element, and a second region which is in contact with a second heating element. The first flow path connects the inflow port and the outflow port, and overlaps with the first region and the second region in a planar view of the housing. The second flow path joins the first flow path at a position downstream of the first region and upstream of the second region. In addition, the second flow path has a guide portion for guiding the refrigerant, which flows through the second flow path, to the first flow path.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
A semiconductor module according to one aspect of the present disclosure comprises a semiconductor device, a cooling plate, and a flow path forming member. The cooling plate is provided on one main surface of the semiconductor device. The flow path forming member: is provided on the other main surface opposite to the one main surface of the semiconductor device; includes a bottom member abutting on the other main surface, and lateral members standing upright from opposing ends of the bottom member; and forms a flow path for a refrigerant.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
A semiconductor module according to one aspect of the present disclosure comprises a first substrate, a second substrate, and a cooler. The first substrate is provided with a first semiconductor element on one main surface thereof, and is provided with a cooling plate on the other main surface thereof. The second substrate is disposed oppositely from the first substrate, is provided with a second semiconductor element on one main surface thereof that faces the one main surface of the first substrate, and is provided with a cooling plate on the other main surface thereof. The cooler is disposed between the first substrate and the second substrate and, at a heat transfer part, at least surfaces of the cooler which face the one main surface of the first substrate and the one main surface of the second substrate are covered with an insulation layer.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H01L 23/427 - Cooling by change of state, e.g. use of heat pipes
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
65.
ROTOR, ROTARY ELECTRIC MACHINE, AND DRIVING DEVICE
One aspect of a rotor according to the present invention is a rotor which is disposed inside an annular stator and can rotate about a center axis line, the rotor comprising: a shaft extending along the center axis line; a rotor core fixed to the shaft; and an annular end plate which is provided with an insertion hole into which the shaft is inserted, and is disposed axially side by side with the rotor core. The shaft is provided with: a cavity part provided inside the shaft; and a through-hole which extends radially outside from the cavity part and is open in the outer circumferential surface of the shaft. The end plate has a first side surface facing one side in the axial direction. The first side surface is provided with a groove part having: a first end section connected to the opening of the through-hole; and a second end section located radially outside the first end section. The groove part has a first flow path section extending in a direction oblique to the radial direction. The second end section is located at the first flow path section.
A rotating electric machine includes a rotor rotatable about a central axis, and a stator positioned radially outside the rotor. The rotor includes a shaft axially extending about the central axis, rotor core portions fixed to an outer peripheral surface of the shaft and in an axial direction, a magnet held by each of the rotor core portions, and at least one spacer that is a non-magnetic body with a ring-plate shape about the central axis and is between the rotor core portions which are axially adjacent to each other. The spacer is smaller in outer diameter than the rotor core portion.
The present invention comprises: a motor rotatable around a first axis; a gear unit that transfers a driving force of the motor to an output shaft extending along a second axis parallel to the first axis; a control unit arranged on one side with respect to the first axis in a first direction orthogonal to the first axis; a housing; a first auxiliary machine arranged on the other side with respect to the first axis in the first direction and on one side with respect to the first axis in a second direction orthogonal to the first direction; a second auxiliary machine arranged on the other side in the first direction and on the other side in the second direction with respect to the first axis; a first connection member connecting the control unit with the first auxiliary machine; and a second connection member connecting the control unit with the second auxiliary machine. Of the first auxiliary machine and the second auxiliary machine, one is a pump and the other is a cooler. The second axis is arranged on the one side with respect to the first axis in the second direction. A part of the first connection member is arranged between the first axis and the second axis. A part of the second connection member is arranged on the other side with respect to the first axis in the second direction.
In the present invention, one embodiment of a drive device comprises: a rotor having a shaft that extends along a center axis line; a stator opposing the rotor with a gap therebetween; a housing accommodating the rotor and the stator; and a resolver having a resolver rotor fixed to the shaft, and a resolver stator located radially outside the resolver rotor. The housing has a lateral wall part located axially on one side of the rotor. The lateral wall part has a tubular section inside which the resolver stator is held. The tubular section has: a first inner circumferential surface surrounding an outer circumferential surface of the resolver stator; a first surface that is connected to an end on one axial side of the first inner circumferential surface, and that faces the one axial side; a second surface that is connected to an end on the other axial side of the first inner circumferential surface, and that faces the other axial side; and one or more crimping sections provided to the first surface. The one or more crimping sections include a stopper part that protrudes radially inward with respect to the outer circumferential surface of the resolver stator and that makes contact with an end surface on one axial side of the resolver stator.
H02K 24/00 - Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
In a drive device, a first flow path of a fluid connects a gear accommodation portion and an inlet of a pump. A second flow path connects an outlet of the pump and one end of a third flow path via a cooler. The third flow path is inside a partition wall of a housing and intersects a rotation axis of a first shaft. A fourth flow path connects another end of the third flow path and one end of a fifth flow path. The fifth flow path is inside a gear side lid of the housing. Another end of the fifth flow path is connected to one end of a second shaft in an axial direction. One end of a sixth flow path is connected to another end of the third flow path. Another end of the sixth flow path is inside a housing tubular portion.
One aspect of a rotating electric machine according to the present invention comprises: a rotor; a stator; a housing including a first accommodating portion accommodating the rotor and the stator therein; and a hollow tubular member extending in an axial direction and accommodated inside the first accommodating portion. A stator core includes a stator core body and at least one fixation portion protruding radially outward from an outer peripheral face of the stator core body. The at least one fixation portion comprises an upper fixation portion positioned on the upper side of a central shaft in the vertical direction. The upper fixation portion is positioned on one side in a circumferential direction of the tubular member. The tubular member includes a first opening that opens inside the first accommodating portion and is positioned on the upper side of the stator core body in the vertical direction. At least a part of the tubular member, when seen in the vertical direction, overlaps a tooth positioned on an uppermost side in the vertical direction among a plurality of teeth. An inner face of the first accommodating portion includes an opposing portion opposing a radially outer side of the upper fixation portion via a gap. The first opening opens toward the opposing portion.
A cooling assembly includes a first heat exchanger and a first flow path pipe. The first heat exchanger comes into contact with a first heat generating component. The first flow path pipe is connected to the first heat exchanger. The first flow path pipe includes a first intermediate portion between one end of the first flow path pipe connected to the first heat exchanger and the other end of the first flow path pipe. The first heat exchanger includes a first fixing portion that fixes the first intermediate portion of the first flow path pipe. The first heat exchanger includes a metal cold plate in contact with the first heat generating component, and a synthetic resin cover on one side in a first direction with respect to the cold plate.
In an aspect of the present invention, a motor comprises an annular stator core including a plurality of teeth portions extending along a radial direction and a plurality of conductor-connected bodies each including a plurality of conductors connected to each other. The conductor connected bodies are wave-wound along a circumferential direction of the stator core in each slot between the plurality of teeth portions. The plurality of conductor-connected bodies are arrayed in layers arranged in a radial direction in the slot. Among the layers in which the conductor-connected bodies are arranged in the slot, the radially outermost one is referred to as an outermost layer and the radially innermost one is referred to as an innermost layer. Each conductor-connected body includes a first terminal portion and a second terminal portion as both end portions. At least one of the plurality of first terminal portions and the plurality of second terminal portions is drawn from the outermost layer of the slot toward one side in an axial direction. At least one of the plurality of first terminal portions and the plurality of second terminal portions is drawn from the innermost layer of the slot toward the one side in an axial direction.
A cold plate includes an opposing portion, a cover portion, and a heat exchange chamber. The opposing portion opposes a heat generating component on one side in a first direction. The cover portion is arranged on another side of the opposing portion in the first direction. The heat exchange chamber includes at least the opposing portion and the cover portion to conduct heat from the heat generating component to a refrigerant through the opposing portion. The opposing portion includes a first cooling surface and a second cooling surface. The first cooling surface is provided on the one side in the first direction. The second cooling surface is provided on the one side in the first direction. The second cooling surface is spaced away from the first cooling surface in the first direction.
A cooling assembly is connectable with a cold plate that comes into thermal contact with a heat source, and includes a first manifold, a second manifold, and a radiator. The first manifold causes a refrigerant having circulated through a first pipe to flow out from outflow ports toward the cold plate. In the second manifold, the refrigerant flowing into inflow ports from the cold plate circulates through a second pipe. In the radiator, the refrigerant having circulated through the second pipe circulates through the flow paths arranged side by side at intervals. Each of the first and second pipes opposes a portion of the radiator in the first direction.
In one embodiment, this rotor is able to rotate about a central axis and comprises: a shaft extending in the axial direction; a rotor core fixed to the shaft; and an end plate arranged lined up in the axial direction with the rotor core. The shaft has a gap provided in the interior of the shaft, and a through hole connecting to the gap. The through hole has a first opening that opens on an outer peripheral surface of the shaft. The end plate has a first groove extending in the radial direction. The first groove has a second opening that opens on the reverse side from the side where the rotor core is located in the axial direction. A radially inward end of the first groove connects to the first opening. An inner surface of the first groove has a groove bottom surface located on the side where the rotor core is located in the axial direction. The groove bottom surface has a first surface that, going radially outward, draws increasingly apart from the rotor core in the axial direction.
This cooling unit has: a first cold plate and a second cold plate; an inflow pipe; and an outflow pipe. The first cold plate and the second cold plate are respectively disposed on both sides of a heat-generating component in a first direction. The inflow pipe allows refrigerant to flow into the first cold plate and the second cold plate. The refrigerant flowing out from the first cold plate and the second cold plate passes through the outflow pipe. At least a section of the first cold plate and at least a section of the second cold plate overlap in the first direction. At least a section of the inflow pipe and at least a section of the outflow pipe are disposed between the first cold plate and the second cold plate in the first direction.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
A stator includes star-connected coils of a plurality of phases. Each coil has bodies each configured by connecting conductors in series. Each body is wound while passing alternately through an M-th layer and an (M+1)-th layer of a slot. Each body includes: a first terminal; a first part wave-wound from the first terminal to one side in a circumferential direction; a folded portion connected to the first part on the one side; a second part wave-wound from the folded portion to the other side in the circumferential direction; and a second terminal connected to the second part on the other side. The first parts of the bodies of the same phase are sequentially arranged in slots arranged one by one on the one side. The second parts of the bodies of the same phase are sequentially arranged in slots arranged one by one on the other side.
An optical assembly includes a fixed body and a movable body supported swingably with respect to the fixed body, and the movable body includes an optical element including an optical axis, a holder into which the optical element is insertable, a contact portion in the holder and in contact with the fixed body, and an elastic body to press the contact portion toward the fixed body.
A motor includes a shaft, a base portion, a stator, and a rotor. The shaft extends along a central axis extending in an axial direction. The base portion extends in a radial direction on one axial direction side of the shaft. The stator is located in another axial direction with respect to the base portion and surrounds the shaft. The rotor is rotatable around the central axis. The rotor includes a rotor tube portion, a magnet, and a rotor flange portion. The rotor tube portion surrounds the stator. The magnet is opposed to the stator in the radial direction. The rotor flange portion extends in a radially outer direction from one axial end portion of the rotor tube portion. The rotor tube portion includes a yoke tube portion and a hub tube portion. The yoke tube portion is located on a radially inside surface of the hub tube portion.
3422. The total number of high refractive index films 130a and low refractive index films 130b is an even number. For the high refractive index film 130a and the low refractive index film 130b of the antireflection layer 130, the ratio of the thickness of the thicker film to the thickness of the thinner film of two adjacent films is 6 times or less. The average reflectance of the antireflection layer 130 in a wavelength range of 300-400 nm is 40% or more.
A motor includes a rotor, a stator, a motor housing, an inverter, and an inverter case. The motor housing and the inverter case are arranged in contact with each other. The inverter case has a side wall surrounding the inverter when viewed from above. The side wall includes an upper side wall located in an upper part of the side wall, a step wall extending from a lower end of the upper side wall, and a lower side wall extending downward from an end edge of the step wall. The side wall has a plurality of outer ribs extending in the up-down direction. The outer rib is connected to the outer surface of the step wall and the outer surface of the upper side wall or the lower side wall located inside the inverter case relative to the step wall.
A heat radiator includes a plate-shaped base portion that extends in a first direction along the flowing direction of a refrigerant and in a second direction perpendicular or substantially perpendicular to the first direction and has a thickness in a third direction and a fin protruding from the base portion toward one side in the third direction. The fin includes a flat plate-shaped sidewall that extends in the first direction and the third direction with the second direction being a thickness direction. The sidewall includes a protrusion protruding in the second direction. A protrusion amount of the protrusion in the second direction is equal to or less than half of an interval between the sidewalls of the fin adjacent in the second direction. The protrusion includes an opposing surface opposing the flowing direction of the refrigerant. The opposing surface has a rectangular or substantially rectangular shape extending from the sidewall.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
A cooling structure includes a base with a plate shape, that extends in a first direction along a refrigerant flow direction and in a second direction perpendicular or substantially perpendicular to the first direction, a thickness of which extending in a third direction perpendicular or substantially perpendicular to the first direction and the second direction, and fins that protrude from the base to one side in the third direction, that extend in the first direction, and that are side by side in the second direction. Each of the fins includes a curved portion that is curved due to a convex portion, protruding to one side in the second direction, and a concave portion, recessed from the other side to the one side in the second direction, located at a same position in the first direction.
A liquid cooling jacket includes, with a direction along a direction in which a refrigerant flows being defined as a first direction, and a direction perpendicular or substantially perpendicular to the first direction being defined as a second direction, a refrigerant flow path having a width in the second direction and including a heat radiator on one side in the third direction, a bottom surface portion located on the other side of the refrigerant flow path in the third direction, and protrusions protruding from the bottom surface portion toward one side in the third direction and arranged in the first direction. With one side in the first direction being defined as a downstream side, the protrusions include a convex portion extending in the second direction and protruding toward the other side in the first direction.
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
F28F 3/12 - Elements constructed in the shape of a hollow panel, e.g. with channels
One aspect of a rotor of the present invention has a plurality of magnetic poles arranged along the circumferential direction, a rotor core extending in a columnar shape centered on a central axis, and a plurality of magnets that are held in a magnet hole of the rotor core and form magnetic poles. A straight line passing through the center of the magnetic poles when seen axially is a d-axis. An outer circumferential surface of the rotor core, which faces radially outward, has a plurality of outer end portions located on the d-axis of the respective magnetic poles, and a plurality of retract portions, each of which is located between the outer end portions in the circumferential direction, and offset to a radially inner side relative to the outer end portions.
A cooling device includes a liquid cooling jacket and a heat dissipator including a plate-shaped base portion extending in a first direction along a direction in which a refrigerant flows and in a second direction perpendicular or substantially perpendicular to the first direction and has a thickness in a third direction, a fin protruding from the base portion toward, a top plate portion provided at the fin, and a bent portion bent toward the one side in the third direction at an end on one side in the first direction of the top plate portion, with the one side in the first direction being a downstream side. Between the liquid cooling jacket and the top plate portion, a gap in the third direction is provided, and the bent portion opposes the liquid cooling jacket.
F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
F28F 3/12 - Elements constructed in the shape of a hollow panel, e.g. with channels
A cooling device includes a heat dissipator and a liquid cooling jacket. The heat dissipator includes a plate-shaped base portion that extends in a first direction along a direction where a refrigerant flows and in a second direction orthogonal to the first direction and has a thickness in a third direction, a fin that protrudes from the base portion to one side in the third direction, and a top plate portion provided to an end of the fin. The liquid cooling jacket includes a top surface located on one side of the top plate portion with a gap between the top surface and the top plate portion. Top surface recesses recessed from the top surface toward one side and located side by side in the first direction.
F28D 15/00 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
A stator core includes teeth located in a circumferential direction and slots between the teeth and penetrating in an axial direction, and a wedge located radially inward of the slots. The stator core includes a groove portion at an end of each of the teeth in a circumferential direction. A portion of the wedge is located in the groove portion.
A motor assembly includes a motor, a board, and a housing. The housing includes a first housing including a board area, a second housing opposing the board area in a predetermined direction, and a seal sealing between the first housing and the second housing. The first housing includes an outer edge surrounding the board area and a recess recessed to an inward side from the outer edge along an inner periphery of the outer edge. The second housing includes a protrusion protruding to the inward side and located in the recess. The protrusion is an annular body partly including a discontinuity. The seal is located, at least partially, in the recess. The motor assembly further includes a blocking portion located in the first housing. The blocking portion blocks, at least partially, the discontinuity.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 11/30 - Structural association with control circuits or drive circuits
H02K 1/22 - Rotating parts of the magnetic circuit
A motor includes a rotor, a stator, a stator accommodating portion, a seal, and a lid. The stator opposes the rotor with a gap interposed radially inward. The stator accommodating portion accommodates the stator, includes an opening on one end surface in an axial direction, and has a tubular shape. The seal is filled in the stator accommodating portion. The lid covers the opening. The stator accommodating portion includes a cutout and a pullout piece. The cutout is recessed from one end in the axial direction to the other side in the axial direction, and a lead wire connected to the stator is pulled out. The pullout piece protrudes radially outward from a bottom of the cutout, and the lead wire is positioned between the lid and the pullout piece via an elastic portion on an end surface on one side in the axial direction of the pullout piece.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 11/33 - Drive circuits, e.g. power electronics
H02K 21/22 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
A drive apparatus includes a housing including a motor, a power transmission unit, a parking mechanism, and a gear accommodation portion. The parking mechanism includes a parking gear, a pawl, a transmission unit, and a sleeve. The transmission unit includes a cam rod and a cam attached to the cam rod to operate the pawl. The cam is guided by the sleeve. The gear accommodation portion has first and second housing members, a breather, and a dividing wall partitioning a space where the breather opens inside the gear accommodation portion. The second housing member is provided with a holding recess that opens to a first side in an axial direction and holds the sleeve. The first housing member is provided with a retaining wall that covers a surface facing a second side in the axial direction of the sleeve. The retaining wall is a part of the dividing wall.
In a drive device according to an aspect of the present invention, a housing has a side wall, a holding cylindrical part, and a projecting part. The holding cylindrical part holds a bearing. The holding cylindrical part is provided with a first opening part penetrating in the radial direction of a third axis. The first opening part has an inlet end positioned on the outer circumferential surface of the holding cylindrical part. The inlet end opens on one side in a third direction. The projecting part is positioned at one side from the first opening part in the third direction and between a second axis and the third axis in a second direction. The projecting part has a first surface oriented to one side in the second direction and a second surface oriented to the other side in the second direction. The first surface receives a fluid scraped up by a gear, and guides the fluid to the first opening part. The second surface receives a fluid scraped up by a ring gear, and guides the fluid to the first opening part.
One aspect of this drive device according to the present invention comprises: a motor that has a rotor that rotates about a center axis and a stator that radially faces the rotor; a cylindrical water jacket that is centered about the center axis and opens on both sides in the axial direction; and a housing that contains the motor and the water jacket. The stator has an annular stator core obtained by helically laminating band-like plates. The water jacket is disposed on the radial inside of the housing. The water jacket has a shrink-fit part that holds the outer circumferential surface of the stator core.
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
One aspect of a drive device according to the present invention includes a motor including a rotor that can rotate around a central axis and a stator facing the rotor across a gap in a radial direction, a fan that rotates with the rotor, and a housing accommodating the motor. The stator includes an annular stator core and a coil mounted on the stator core. The coil includes a pair of coil ends respectively protruding in the axial direction from the end faces of the stator core at opposite sides thereof in the axial direction. The housing includes a water jacket externally surrounding the stator in the radial direction. The water jacket is provided with a plurality of fins on an inner circumferential surface of the water jacket, the fins being disposed on the outside of the coil ends in the radial direction. The fan includes an outlet that opens outward in the radial direction. The outlet, the coil ends, and the fins are juxtaposed in the radial direction.
One aspect of a drive device according to the present invention comprises a motor, a power transmission part, a housing, first and second bearings, and a flow path in which a fluid flows. An end part on one side in the axial direction of a first shaft of the motor has a connection opening in which a spline groove is provided. An end part on the other side in the axial direction of a second shaft of the power transmission part has a connection protrusion in which a spline projection is provided. The first shaft and the second shaft are connected by the spline groove and the spline projection meshing with each other. Provided to a partition wall of the housing is a communicating hole via which a motor chamber and a gear chamber are in communication. The inner peripheral surface of the communicating hole holds the first bearing and the second bearing. Between the axial direction of the second bearing and the first bearing in the communicating hole is provided a connection space into which the connection opening opens. The flow path has a first flow path that connects the gear chamber and the connection space and a second flow path that connects the connection space and the motor chamber.
A driving apparatus according to an aspect of the present invention comprises: a motor that rotates about a center axis; a shaft that rotates around the center axis by means of power of the motor; a first gear that is provided in the outer circumferential surface of the shaft; a second gear part that has a large-diameter gear engaged with the first gear and a small-diameter gear smaller in diameter than the large-diameter gear and that rotates around an intermediate axis, integrally with the large-diameter gear; a differential device that has a third gear engaged with the small-diameter gear and that rotates around a differential axis; and a parking mechanism that has a parking gear provided in the outer circumferential surface of the shaft, a parking pole, and a transmission part that transmits power to the parking pole. The parking gear is disposed between the motor and the first gear in an axial direction, and at least partially overlaps the large-diameter gear in the axial direction.
One embodiment of this drive device comprises: a motor having a first shaft; a power transmission unit having a second shaft; a housing; and a flow channel through which a fluid flows. The first shaft and the second shaft are mutually connected by engagement between a spline groove in a recess section and a spline protrusion of a protrusion section. The housing is provided with a dividing wall that partitions the interior of the housing into a motor chamber and a gear chamber. The dividing wall is provided with an interconnecting hole interconnecting the motor chamber and the gear chamber. An inner peripheral surface of the interconnecting hole holds a first bearing and a second bearing. An interconnecting space to which the recess section is open is provided in an interval in the axial direction between the first bearing and the second bearing in the interconnecting hole. The flow channel inlcudes: a first flow channel linking a first storage part to the interconnecting space; a second flow channel linking the interconnecting space to the inside of the recess section; and a third flow channel linking the interconnecting space to a second storage part.
This rotor is rotatable about the central axis and comprises: a rotor core; and annular conductive parts arranged at axially opposite sides of the rotor core. The rotor core has a plurality of flux barrier groups arranged at intervals along the circumferential direction. The plurality of flux barrier groups each include a plurality of flux barriers arranged radially side by side, and the plurality of flux barriers each have a shape protruding radially inward as viewed in the axial direction. One or more flux barriers, of the plurality of flux barriers in each of the flux barrier groups, have disposed thereinside conductor bodies electrically connected to the annular conductive parts. As viewed in the axial direction, when the half of the outer diameter of the rotor core is defined as Ror, the half of the outer diameter of the annular conductive parts is defined as Roer, and the minimum distance from the central axis line to the radially outermost one of the flux barriers which have disposed thereinside the conductor bodies is defined as Rocb, the relation of Rocb
H02K 1/22 - Rotating parts of the magnetic circuit
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 21/14 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
In a rotor according to one aspect of the present invention, a shaft has: a first shaft hole that extends in the axial direction; and a second shaft hole that extends from the first shaft hole radially toward the outside and opens on the outer circumferential surface of the shaft. A rotor core has a plurality of core holes that extend in the axial direction and are disposed at intervals therebetween in the circumferential direction. A plate has through-holes that overlap the core holes as seen from the axial direction, and a flow path section that joins the second shaft hole and the through-holes. A second distance from the center axis to the outer edge of the plate is less than a first distance from the center axis to the outer edge of the rotor core.
