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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：US20230139180A1
公开(公告)日：2023-05-04
申请号：US17969688
申请日：2022-10-20
Applicant: NIDEC CORPORATION
Inventor： Yuki ISHIKAWA , Hitoshi KUROYANAGI , Keisuke NAKATA
Abstract: A drive apparatus includes a motor, a transmission, an inverter, a housing accommodating the motor, transmission, inverter, and a fluid, a refrigerant for the inverter, a pump for the fluid, and a cooler that exchanges heat between the fluid and refrigerant. The housing includes first-third portions accommodating the motor, transmission and inverter, respectively, and a support portion. The second portion is on one side of the first portion in an axial direction. The support portion is radially outside in a circumferential direction, and is connected to an outer peripheral portion of the first portion and a bottom portion of the third portion. The support portion supports the pump and the cooler. Any one of the pump and the cooler is disposed on one side in the circumferential direction with respect to the support portion, and the other is disposed radially outside with respect to the support portion.
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公开(公告)号：US20220173639A1
公开(公告)日：2022-06-02
申请号：US17436587
申请日：2020-01-10
Applicant: NIDEC CORPORATION
Inventor： Shuhei NAKAMATSU , Tsubasa TAMURA , Hitoshi KUROYANAGI
Abstract: Provided is a motor unit including: a motor that rotates about a motor axis; a gear unit connected to the motor; an inverter that controls a current to be supplied to the motor; and a housing having a motor housing portion that houses the motor, an inverter housing portion that houses the inverter, and a gear housing portion that houses the gear unit. The inverter housing portion is supported by the motor housing portion and the gear housing portion. The housing includes a housing body that is a single member, the housing body including: a first wall portion that also serves as a side wall of each of the inverter housing portion and the motor housing portion; and a second wall portion that also serves as a side wall of each of the inverter housing portion and the gear housing portion.
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公开(公告)号：US20230090548A1
公开(公告)日：2023-03-23
申请号：US17939963
申请日：2022-09-08
Applicant: NIDEC CORPORATION
Inventor： Yuki ISHIKAWA , Shuhei NAKAMATSU , Hitoshi KUROYANAGI
Abstract: A drive apparatus includes an inverter accommodated in an inverter housing, a cooling flow path through which a first fluid for cooling the inverter can flow, and a heat exchanger configured to allow a second fluid for cooling a motor to exchange heat with the first fluid. The inverter includes a first element and a second element arranged side by side in a second direction perpendicular to the first direction. The cooling flow path includes a first cooling portion that cools the first element with the first fluid, a second cooling portion that cools the second element with the first fluid, a first connection flow path that connects the first cooling portion and the second cooling portion, and a second connection flow path that connects the second cooling portion and the heat exchanger.
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公开(公告)号：US20220305892A1
公开(公告)日：2022-09-29
申请号：US17694690
申请日：2022-03-15
Applicant: NIDEC CORPORATION
Inventor： Yuki ISHIKAWA , Hitoshi KUROYANAGI
Abstract: In a drive device, a housing includes a motor accommodation portion for accommodating a motor and an inverter accommodation portion for accommodating an inverter unit, the motor accommodation portion includes a tubular portion of a tubular shape extending in a first direction, the inverter accommodation portion includes a peripheral wall portion surrounding the inverter accommodation portion when viewed from a second direction and a plate portion extending from the tubular portion along one side in a direction perpendicular to the first direction and intersecting the second direction and continuous with the peripheral wall portion, and at least one of the pump and the oil cooler is fixed to the plate portion.
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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：US20220286025A1
公开(公告)日：2022-09-08
申请号：US17684340
申请日：2022-03-01
Applicant: NIDEC CORPORATION
Inventor： Hitoshi KUROYANAGI , Yuki ISHIKAWA , Keisuke NAKATA
Abstract: Provided is a rotary electric machine including a rotor, a stator, a housing, an inverter device, a bus bar, and a pipe member in a hollow shape accommodated inside the housing. The housing is provided inside with a first region located between an outer surface of a stator core and an inner surface of the housing as viewed in an axial direction, and a second region located between the outer surface of the stator core and the inner surface of the housing as viewed in the axial direction while being disposed apart from the first region in a circumferential direction. The second region is wider than the first region. The pipe member overlaps the first region as viewed in the axial direction. The bus bar overlaps the second region as viewed in the axial direction.
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公开(公告)号：US20230010604A1
公开(公告)日：2023-01-12
申请号：US17785049
申请日：2020-11-19
Applicant: NIDEC CORPORATION
Inventor： Yuki ISHIKAWA , Hitoshi KUROYANAGI , Naohiro WADA , Hironobu KUMAGAI , Hisashi FUJIHARA
Abstract: A drive device includes a motor and an inverter. A motor axis is parallel to an output axis. The inverter is located in a second direction orthogonal to a first direction with respect to the motor axis and extends in a third direction orthogonal to the first and second directions. When viewed from the first direction, a virtual straight line passing through the axes extends in the third direction. An inverter housing portion overlaps the axes when viewed from the second direction, and has a boundary wall on the virtual straight line side in the second direction. In the second direction, a distance between the boundary wall and the output axis is smaller than a distance between the boundary wall and the motor axis. A motor side connection portion has a portion closer to the side opposite to the output axis than the motor axis in the third direction.
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公开(公告)号：US20220158528A1
公开(公告)日：2022-05-19
申请号：US17519820
申请日：2021-11-05
Applicant: Nidec Corporation
Inventor： Yuki ISHIKAWA , Hitoshi KUROYANAGI , Naohiro WADA
Abstract: A housing of a drive device includes a tubular portion, a side plate portion, a plate portion, and a peripheral wall portion. The tubular portion extends in a first direction and accommodates a motor. The side plate portion has a plate shape intersecting the first direction, and is at one end portion of the tubular portion in the first direction. The plate portion expands from the tubular portion along one of the first direction and a second direction perpendicular to the first direction. The peripheral wall portion surrounds an inverter accommodation portion that accommodates inverter when viewed from a third direction perpendicular to the first direction and the second direction, and is connected to the plate portion. Each of a pump and an oil cooler is at any of one end portion of the peripheral wall portion in the second direction, another end portion of the plate portion in the third direction, and another end portion of the side plate portion in the first direction.
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公开(公告)号：US20220158523A1
公开(公告)日：2022-05-19
申请号：US17519819
申请日：2021-11-05
Applicant: Nidec Corporation
Inventor： Yuki ISHIKAWA , Hitoshi KUROYANAGI , Naohiro WADA
Abstract: A gear portion of a drive device is connected to a motor shaft. An oil passage through which oil to cool a motor flows includes a first oil passage, a second oil passage, a third oil passage, and a fourth oil passage. The first oil passage connects a gear accommodation portion and a pump accommodation portion. The second oil passage connects the pump accommodation portion and an oil cooler. The third oil passage connects the oil cooler and the fourth oil passage. The fourth oil passage connects the third oil passage and a motor accommodation portion. Each of the first oil passage, the second oil passage, and the third oil passage is in a first housing portion. The fourth oil passage is in a third housing portion.
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