公开(公告)号：US20210143702A1

公开(公告)日：2021-05-13

申请号：US16621713

申请日：2018-06-25

Applicant: Nidec Corporation

Inventor： Hideaki UCHISE ,  Takayuki MIGITA ,  Hiroshi KITAGAKI ,  Tatsuya ITO ,  Akihiro OKITA

IPC: H02K3/52 ,  H02K1/14 ,  H02K3/32 ,  H02K15/02 ,  H02K15/10 ,  H02K15/095

Abstract: A stator includes a stator core, an insulator attached to the stator core, and coil wires. The insulator includes base portions respectively surrounding outer peripheral surfaces of teeth and an outer wall portion located immediately above the core back and extending in a circumferential direction. Each of the coil wires includes coils into which each of the coil wires is wound around more than one of the teeth by concentrated winding, a connecting wire connecting the coils, and a pair of lead wires located at two ends of each of the coil wires and extending from the coils. The connecting wire of each of the coil wires includes at least one outside-passing portion extending along an outer surface of the outer wall portion on a radially outer side of the outer wall portion.

公开(公告)号：US20190386545A1

公开(公告)日：2019-12-19

申请号：US16479286

申请日：2018-01-06

Applicant: NIDEC CORPORATION

Inventor： Shuhei NAKAMATSU ,  Takayuki MIGITA ,  Hisashi FUJIHARA ,  Masato AONO ,  Takashi SHIRAISHI

IPC: H02K11/215 ,  H02K1/28 ,  H02K5/16

Abstract: A motor includes a magnet rotating together with a rotor about a central axis, a substrate on which a sensor to detect a position of the magnet is installed, a housing to hold a stator to drive the rotor, a bearing assembly including a bearing holder, and a conductor assembly between the housing and the bearing assembly. The conductor assembly includes a conductor including a first conductor electrically connected to the sensor through the substrate and a conductor holder covering the conductor. The substrate is fixed to the conductor holder. In the radial direction, a gap is located between an outer side surface of the bearing holder and an inner side surface of the conductor holder, and at least a portion of the magnet is located in the gap.

公开(公告)号：US20190207478A1

公开(公告)日：2019-07-04

申请号：US16323268

申请日：2017-08-07

Applicant: Nidec Corporation

Inventor： Yasuo YAMAGUCHI ,  Takayuki MIGITA ,  Yuki ISHIKAWA

IPC: H02K9/19 ,  H02K5/20 ,  H02K11/33

CPC classification number: H02K9/19 ,  H02K5/20 ,  H02K11/33

Abstract: A drive apparatus includes a motor that includes a motor shaft disposed along a first central axis that extends in one direction, a housing that includes a first housing portion housing the motor and that is capable of storing oil, and a liquid cooling portion disposed in thermal contact with an inverter electrically coupled to the motor, the liquid cooling portion including a refrigerant liquid flowing therein. The housing includes a contact portion with which the liquid cooling portion is in thermal contact. At least a portion of the contact portion is disposed below an oil surface of the oil stored in the housing.

公开(公告)号：US20190186622A1

公开(公告)日：2019-06-20

申请号：US16323932

申请日：2017-08-07

Applicant: Nidec Corporation

Inventor： Yuki ISHIKAWA ,  Yasuo YAMAGUCHI ,  Takayuki MIGITA

IPC: F16H57/04 ,  F16H57/021 ,  H02K7/08 ,  H02K7/116 ,  H02K9/19

CPC classification number: F16H57/0476 ,  B60K6/26 ,  B60K6/36 ,  B60K6/387 ,  B60K6/405 ,  B60K17/04 ,  B60Y2200/92 ,  B60Y2306/05 ,  B60Y2400/60 ,  B60Y2400/70 ,  B60Y2410/10 ,  F16H57/021 ,  F16H57/043 ,  F16H2057/02034 ,  H02K7/083 ,  H02K7/116 ,  H02K9/19

Abstract: A motor unit includes a motor including a shaft to rotate about a motor axis, and a stator, a reduction gear, and a housing including a housing space that includes a motor chamber to house the motor and a gear chamber to house the reduction gear. The housing includes a partition to divide the motor chamber and the gear chamber. The shaft includes a first shaft portion, a connecting shaft portion, and a second shaft portion arranged coaxially with one another, and a separating mechanism between the connecting shaft portion and the second shaft portion. The first shaft portion includes a first end portion extending through an insert hole defined in the partition from a side on which the motor chamber lies. The connecting shaft portion includes a second end portion coupled to the first end portion, a third end portion located on a side opposite to the second end portion, and a connection flange portion extending radially outward at the third end portion. The second shaft portion includes a fourth end portion on a side closer to the third end portion of the connecting shaft portion. The separating mechanism selectively separates the connection flange portion and the fourth end portion from each other.

公开(公告)号：US20190036406A1

公开(公告)日：2019-01-31

申请号：US16145317

申请日：2018-09-28

Applicant: Nidec Corporation

Inventor： Yasuaki NAKAHARA ,  Takayuki MIGITA ,  Hisashi FUJIHARA ,  Tsuyoshi NAKAMURA

IPC: H02K3/28 ,  H02K1/14 ,  H02K3/18 ,  H02K3/32 ,  H02K3/52

CPC classification number: H02K3/28 ,  H02K1/146 ,  H02K3/04 ,  H02K3/18 ,  H02K3/325 ,  H02K3/52 ,  H02K3/522 ,  H02K2203/09 ,  H02K2213/03

Abstract: A stator includes conductive wires wound around teeth, and slots between adjacent teeth in a circumferential direction. The conductive wires include conductive wires of three phases corresponding to a U-phase, a V-phase, and a W-phase, and the conductive wires are delta connected. Coils, in which any one of the conductive wires is wound around the teeth, are repeatedly disposed in order of the U-phase, the V-phase, and the W-phase in the circumferential direction. In each of the U-phase, the V-phase, and the W-phase, at least two coils are connected in series and adjacent in the circumferential direction. A direction in which the U-phase and W-phase conductive wires are wound around the teeth and a direction in which the V-phase conductive wire is wound around the tooth are opposite.

公开(公告)号：US20160254711A1

公开(公告)日：2016-09-01

申请号：US15052285

申请日：2016-02-24

Applicant: NIDEC CORPORATION

Inventor： Tatsuro KAWAMOTO ,  Takayuki MIGITA ,  Takao ATARASHI ,  Yasuaki NAKAHARA

IPC: H02K1/27 ,  H02K5/16

CPC classification number: H02K1/2773 ,  H02K1/272 ,  H02K1/274 ,  H02K15/03 ,  H02K2213/03

Abstract: A motor may include a rotor including a shaft; a stator; and a bearing supporting the shaft. The rotor may include a plurality of core pieces on an outer side of the shaft, a plurality of permanent magnets, and a mold resin part between the core pieces. The neighboring core pieces may include a magnet insertion hole provided therebetween. The permanent magnet may include two poles, with poles of neighboring magnets facing each other having identical polarity. The mold resin part may include at least one first guide part disposed closer to one side than the center between neighboring core pieces, and covers at least a portion of a surface on one side of the magnet insertion hole in a circumferential direction, the permanent magnet being in direct indirect contact via resin with the core piece disposed on the other side of the magnet insertion hole.

Abstract translation: 马达可以包括：转子，其包括轴; 定子 和支撑轴的轴承。 转子可以包括在轴的外侧上的多个芯片，多个永磁体和在芯片之间的模制树脂部分。 相邻的芯片可以包括设置在它们之间的磁体插入孔。 永磁体可以包括两个极，相邻磁体的磁极彼此相对具有相同的极性。 模具树脂部件可以包括至少一个第一引导部件，该第一引导部件设置成比相邻的芯片之间的中心更靠近一侧，并且在圆周方向上覆盖磁体插入孔的一侧的表面的至少一部分，永磁体 通过树脂直接间接接触，芯片设置在磁体插入孔的另一侧。

公开(公告)号：US20210320548A1

公开(公告)日：2021-10-14

申请号：US17263894

申请日：2019-07-08

Applicant: NIDEC CORPORATION

Inventor： Shinji SHIMODAIRA ,  Takayuki MIGITA ,  Masato AONO ,  Shota KAWASHIMA

IPC: H02K3/52

Abstract: In a stator, a bus bar holder includes: a base; an annular inside wall protruding from a radially inner edge of the base; an annular outside wall protruding from a radially outer edge portion of the base; and a plurality of sidewalls connecting the inside wall and the outside wall. The base, the inside wall, the outside wall, and the sidewall constitute a plurality of recesses. The coil connection units of bus bars protrude from the base. Among the coil leaders, at least a part of the coil leaders is a first coil leader that is accommodated in the recess while the front end is bent onto the other side in the radial direction. The front end of at least one first coil leader is accommodated in each recess and connected to the coil connection unit in the recess.

公开(公告)号：US20210320545A1

公开(公告)日：2021-10-14

申请号：US17263895

申请日：2019-07-08

Applicant: NIDEC CORPORATION

Inventor： Shinji SHIMODAIRA ,  Takayuki MIGITA ,  Masato AONO ,  Shota KAWASHIMA

IPC: H02K3/18 ,  H02K3/38 ,  H02K3/50 ,  H02K3/52 ,  H02K3/32 ,  H02K1/14 ,  H02K11/33 ,  H02K5/173

Abstract: A stator includes a stator core, a plurality of coils, a bus bar holder, and a plurality of bus bars. The bus bar holder includes a base, an annular inside wall and an annular outside wall protruding toward one side in the axial direction, and constitutes a recess recessed on the other side in the axial direction. The coil connection units of bus bars protrude from the base toward one side in the axial direction. Among the coil leaders of each of coils, at least a part of the coil leaders is a first coil leader that is accommodated in the recess while a front end is bent onto the other side in the radial direction. The front end of the first coil leader is connected to the coil connection unit in the recess.

公开(公告)号：US20200153294A1

公开(公告)日：2020-05-14

申请号：US16615853

申请日：2018-06-01

Applicant: Nidec Corporation

Inventor： Masato AONO ,  Takayuki MIGITA ,  Akihiro OKITA

IPC: H02K1/27 ,  H02K7/00 ,  H02K5/00 ,  H02K21/14

Abstract: A rotor includes a shaft, a rotor core fixed to the shaft, a magnet radially outside of the rotor core, a rotor cover including a tubular portion surrounding the rotor core and the magnet, and a resin portion including at least a portion thereof radially inside of the rotor cover. The rotor core includes a core through hole passing through the rotor core in an axial direction. The rotor cover includes a flange portion projecting radially inward from the tubular portion. The flange portion is on a first side of the rotor core in the axial direction, and includes a cover through hole passing through the flange portion in the axial direction.

公开(公告)号：US20190207479A1

公开(公告)日：2019-07-04

申请号：US16323269

申请日：2017-08-07

Applicant: Nidec Corporation

Inventor： Yasuo YAMAGUCHI ,  Takayuki MIGITA ,  Yuki ISHIKAWA

IPC: H02K9/19 ,  H02K5/20 ,  H05K7/20 ,  H02K11/33

CPC classification number: H02K9/19 ,  H02K5/20 ,  H02K11/33 ,  H05K7/20927

Abstract: A drive apparatus includes a motor that includes a motor shaft disposed along a first central axis that extends in one direction a housing that includes a first housing portion housing the motor and that is capable of storing oil, a liquid cooling portion disposed in thermal contact with an inverter electrically coupled to the motor, the liquid cooling portion including a refrigerant liquid flowing therein, and a pipe portion connected to the liquid cooling portion, the refrigerant liquid inside the liquid cooling portion flowing in the pipe portion. The pipe portion passes inside the housing.