公开(公告)号：US20240128828A1

公开(公告)日：2024-04-18

申请号：US18273124

申请日：2021-09-13

Applicant: Hitachi Astemo, Ltd.

Inventor： Kenta SUZUKI ,  Shogo MIYAMOTO ,  Takaki ITAYA ,  Kosaku ONO

IPC: H02K5/20 ,  F16H57/04 ,  H02K9/197

CPC classification number: H02K5/203 ,  F16H57/0423 ,  F16H57/0476 ,  H02K9/197 ,  H02K5/1732

Abstract: Provided is a vehicle drive motor capable of maintaining lubrication of a bearing even in a case where an electric vehicle is not operated for a long period of time. The vehicle drive motor includes a casing in which a cylindrical stator coil is fixed to an inner peripheral surface and an oil passage is provided in an upper portion, an output shaft arranged in the casing and having a rotor fixed to a position facing the stator coil, a bearing that supports the output shaft, and an oil retaining portion that is arranged to face the bearing and stores oil supplied from the oil passage. The oil retaining portion is a pocket-shaped receptacle in which an upper side is lower than a lower end of the output shaft and a lower side is along a lower outer periphery of the bearing as viewed from an axial direction of the output shaft in front view.

公开(公告)号：US20220074488A1

公开(公告)日：2022-03-10

申请号：US17417868

申请日：2019-12-12

Applicant: Hitachi Astemo, Ltd.

Inventor： Shogo MIYAMOTO

IPC: F16H57/04

Abstract: An object of the present invention is to appropriately control cooling water and oil according to situations. A computing device controls a flow rate of cooling water supplied to a motor and an oil pump that supplies oil from a gear box attached to the motor to a coil of the motor. The computing device suppresses the flow rate of the cooling water supplied to the motor when a temperature of oil in the gear box is less than a first threshold, and a temperature of the coil is less than a second threshold, and operates the oil pump.

公开(公告)号：US20220407388A1

公开(公告)日：2022-12-22

申请号：US17779336

申请日：2020-12-04

Applicant: HITACHI ASTEMO, LTD.

Inventor： Shogo MIYAMOTO

IPC: H02K9/19 ,  H02P29/60 ,  H02K11/33

Abstract: A control device that controls cooling of a rotating electrical machine for driving a vehicle includes an arithmetic operation unit that executes predetermined arithmetic operation processing, and a storage unit that is accessible by the arithmetic operation unit. First temperature information from a first temperature detection unit that detects a temperature of a first refrigerant that exchanges heat with at the rotating electrical machine, second temperature information from a second temperature detection unit that detects a temperature of a second refrigerant that exchanges heat with a winding of the rotating electrical machine and is cooled by the first refrigerant, third temperature information from a rotating electrical machine temperature detection unit detects a temperature of the rotating electrical machine, and fourth temperature information from an outside air temperature detection unit are input. The second temperature information is verified by using the first, second, third, and fourth temperature information.

公开(公告)号：US20240266920A1

公开(公告)日：2024-08-08

申请号：US18565440

申请日：2022-02-09

Applicant: Hitachi Astemo, Ltd.

Inventor： Takaki ITAYA ,  Noriyuki MAEKAWA ,  Shigehisa AOYAGI ,  Hideaki GOTO ,  Shogo MIYAMOTO

IPC: H02K9/19 ,  H02K7/116

CPC classification number: H02K9/19 ,  H02K7/116

Abstract: An object of the present invention is to provide an electric motor system capable of suppressing deterioration in cooling performance due to mixing of bubbles (air) into a refrigerant. An electric motor system 100 of the present invention includes: a gear 134; a first surface 155 that receives oil scraped off as the gear 134 rotates; a second surface 153 that is located downward in a vertical direction with respect to the first surface 155, faces the first surface 155 at a position overlapping the first surface 155 in the vertical direction, receives the oil dropped from the first surface 155, and receives the oil scraped up as the gear 134 rotates; and a recess 151 located downward in the vertical direction with respect to the second surface 153 and into which the oil received by the second surface 153 flows. Both ends of the second surface 153 in a horizontal direction perpendicular to the vertical direction and perpendicular to an axial center of the gear 134 are located inside both ends of the recess 151 in the horizontal direction.