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公开(公告)号：US20220216820A1
公开(公告)日：2022-07-07
申请号：US17601836
申请日：2020-04-17
Applicant: Nidec Corporation
Inventor： Keisuke FUKUNAGA , Akihiro NITA
Abstract: A drive device that rotates an axle of a vehicle includes a motor, a transmission that includes a decelerator connected to the motor, a housing that accommodates the motor and the transmission, a temperature sensor to detect a temperature of the motor, and a controller to control the motor. Oil supplied to the transmission is accommodated in the housing. The controller limits an output of the motor based on a detection result of the temperature sensor.
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公开(公告)号：US20220200398A1
公开(公告)日：2022-06-23
申请号：US17601756
申请日：2020-04-14
Applicant: Nidec Corporation
Inventor： Keisuke FUKUNAGA , Yohei MIYATA , Hironobu KUMAGAI
Abstract: A motor assembly includes a motor, an electric pump to supply oil to the motor, an inverter assembly connected to the motor, and a first wire harness and a second wire harness. T The inverter assembly includes an inverter to convert a high-voltage direct current into an alternating current and supply the alternating current to the motor, and a controller to control the inverter and the electric pump. The first wire harness electrically connects an external power supply and the inverter assembly, and passes a low-voltage power supply line. The low-voltage power supply line is, at a branch point, branched into a controller power supply line to supply drive power to the controller and a pump power supply line to supply drive power to the electric pump.
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公开(公告)号：US20220149701A1
公开(公告)日：2022-05-12
申请号：US17436584
申请日：2020-01-10
Applicant: NIDEC CORPORATION
Inventor： Shuhei NAKAMATSU , Hitoshi KUROYANAGI , Keisuke FUKUNAGA
Abstract: A motor unit according to an aspect of the present invention includes: a motor having a rotor that rotates about a motor axis and a stator located radially outside the rotor; an inverter that controls a current to be supplied to the motor; a housing body having a motor housing portion that houses the motor and an inverter housing portion that houses the inverter; and an inverter housing configured to cover an opening of the inverter housing portion while supporting the inverter. The housing body is provided with a first cooling path through which a first refrigerant for cooling the motor flows. The inverter housing is provided with a second cooling path through which a second refrigerant for cooling the inverter flows.
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公开(公告)号：US20190190344A1
公开(公告)日：2019-06-20
申请号：US16286654
申请日：2019-02-27
Applicant: Nidec Corporation
Inventor： Keisuke FUKUNAGA , Takayuki MIGITA
CPC classification number: H02K5/225 , H02K3/28 , H02K3/50 , H02K5/15 , H02K5/16 , H02K5/1732 , H02K2203/09
Abstract: A motor includes a stationary section and a rotating section rotatably supported about a center axis extending in an axial direction. The stationary section includes coils, a stator core, a wire support made of resin and fixed to the stator core, cylindrical portions with a cylindrical shape extending in the axial direction on a radially outer side of the coils, and a top plate portion extending from the cylindrical portion toward an inside of the stationary section in a radial direction. The wire support includes holding portions provided with through holes or notches penetrating in the axial direction. Conducting wires drawn from the coils extend upward through the through holes or the notches. The top plate portion includes top plate holes. The holding portions and the top plate holes are mutually disposed at a position overlapping in the axial and radial directions.
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公开(公告)号：US20230072550A1
公开(公告)日：2023-03-09
申请号：US17983397
申请日：2022-11-09
Applicant: NIDEC CORPORATION
Inventor： Yuki ISHIKAWA , Takanobu OYAMA , Keisuke FUKUNAGA
Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.
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Patent Agency Ranking
公开(公告)号：US20220173638A1
公开(公告)日：2022-06-02
申请号：US17436585
申请日：2020-01-10
Applicant: NIDEC CORPORATION
Inventor： Shuhei NAKAMATSU , Tsubasa TAMURA , Hitoshi KUROYANAGI , Keisuke FUKUNAGA
Abstract: A motor unit according to an aspect of the present invention includes: a motor having a rotor that rotates about a motor axis and a stator located radially outside the rotor; an inverter that controls a current to be supplied to the motor; and a housing having a motor housing portion that houses the motor and an inverter housing portion that houses the inverter. The housing further includes an inverter housing provided with a top plate portion covering an opening of the inverter housing portion. The inverter is fixed to a back surface of the top plate portion, facing the inside of the inverter housing portion.
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公开(公告)号：US20200328652A1
公开(公告)日：2020-10-15
申请号：US16835150
申请日：2020-03-30
Applicant: NIDEC CORPORATION
Inventor： Takahiro MIKI , Shuhei NAKAMATSU , Keisuke FUKUNAGA
Abstract: A drive apparatus includes a motor, a speed reduction mechanism, a power converter, and a housing arranged to house the motor, the speed reduction mechanism, and the power converter. The housing includes a first housing and a second housing. The first housing is arranged to house the motor. The second housing is arranged to cover an opening of the first housing, and hold the power converter between the first housing and the second housing. The second housing includes a peripheral portion fixed to the first housing, and a bottom portion arranged to extend inside of the peripheral portion. The bottom portion is arranged to have a non-flat vibration suppression structure.
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公开(公告)号：US20180301961A1
公开(公告)日：2018-10-18
申请号：US15767416
申请日：2016-10-14
Applicant: Nidec Corporation
Inventor： Keisuke FUKUNAGA
Abstract: An electric motor is provided comprising a rotor unit, a stator unit, a housing, and a bearing mechanism. The rotor unit rotates about a vertical center axis. The stator unit is disposed around the rotor unit. The stator unit is fixed inside of the housing. The bearing mechanism rotatably supports the rotor unit relative to the stator unit. The housing comprises a cylindrical wall portion with a bottom and a cover plate, which covers an opening of the cylindrical wall portion. The bearing mechanism further comprises at least two bearings, an upper bearing is sustained by the cover plate and a lower bearing is sustained by the bottom of the housing. The cover plate is made of electrically conductive elements and comprises at least one projection protruding toward the upper outer side of the cover plate so that the at least one projection is configured to contact, directly or indirectly, at least one grounding contact of a controller, which drives and controls the electric motor disposed on the upper outer side of the cover plate. The controller is connected to a ground potential through the cover plate and the motor housing.
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公开(公告)号：US20150357878A1
公开(公告)日：2015-12-10
申请号：US14760219
申请日：2013-12-25
Applicant: NIDEC CORPORATION
Inventor： Keisuke FUKUNAGA , Takayuki MIGITA
CPC classification number: H02K5/225 , H02K3/28 , H02K3/50 , H02K5/15 , H02K5/16 , H02K5/1732 , H02K2203/09
Abstract: A motor includes a busbar made of metal and a busbar holder made of resin. The busbar includes a plate shaped portion and terminals extending upward from the plate shaped portion and electrically connected to an end portion of a conducting wire included in coils. In addition, a busbar portion defined by the busbar and the busbar holder and a rotor overlap each other in an axial direction. The busbar portion widens in a radial direction, and dimensions of the entire motor in the radial direction are significantly reduced or minimized. In addition, the number of busbars stacked in the axial direction is reduced. As a result, the dimensions of the motor in the axial direction are significantly reduced or minimized.
Abstract translation: 电动机包括由金属制成的母线和由树脂制成的母线架。 母线包括板状部分和从板状部分向上延伸并电连接到包括在线圈中的导线的端部的端子。 此外，由母线和汇流条保持器和转子限定的汇流条部分沿轴向彼此重叠。 汇流条部分在径向方向上变宽，并且整个马达在径向上的尺寸被显着地减小或最小化。 此外，沿轴向堆叠的母线的数量减少。 结果，马达在轴向上的尺寸显着减小或最小化。
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公开(公告)号：US20220185122A1
公开(公告)日：2022-06-16
申请号：US17603965
申请日：2020-04-09
Applicant: Nidec Corporation
Inventor： Keisuke FUKUNAGA
Abstract: A drive device includes a motor, a decelerator connected to the motor, a differential connected to the motor via the decelerator, a housing that accommodates the motor, the decelerator, and the differential, an oil pump that includes a motor assembly and a pump assembly that is rotated by the motor assembly, and sends, to the motor, oil accommodated in the housing, a rotation sensor to detect rotation of the pump assembly, and a controller to control the motor. The controller limits an output of the motor based on a detection result of the rotation sensor.
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