公开(公告)号：US20230038938A1

公开(公告)日：2023-02-09

申请号：US17784066

申请日：2020-12-07

Applicant: HITACHI ASTEMO, LTD.

Inventor： Tomio SAKASHITA

IPC: H02P23/14 ,  H02P25/22

Abstract: A motor drive control apparatus includes energization systems for energizing a motor having a plurality of independent winding sets, with the energization systems corresponding one-to-one to the winding sets. A plurality of sensors is provided for each of the energization systems. A controller is provided for each of the energization systems and controls energization of the corresponding winding set based on output signals of the corresponding sensors. A plurality of sub power supply paths is provided for their respective energization systems. Each sub power supply path connects a power supply path for supplying power to the corresponding sensors and a power supply path in another energization system. A semiconductor switch is provided for each of the sub power supply paths, and, between two different energization systems, when one of the two energization systems exhibits a sensor power supply failure, electrically connects the power supply paths of these two energization systems.

公开(公告)号：US20240074034A1

公开(公告)日：2024-02-29

申请号：US18261250

申请日：2021-11-29

Applicant: HITACHI ASTEMO, LTD.

Inventor： Akira ISHII ,  Tomio SAKASHITA

IPC: H05K1/02 ,  H05K1/14

CPC classification number: H05K1/0218 ,  H05K1/14 ,  H05K2201/09345

Abstract: An electronic control device includes a plurality of circuit boards that transmit signals to each other and a power supply connector for direct-current power. A ground line connected to a ground terminal of the power supply connector is connected to a ground of one of the plurality of circuit boards by way of a ground of another one of the plurality of circuit boards. In this way, the electronic control device including the plurality of circuit boards needs fewer noise reduction components while enabling easier routing of ground lines.

公开(公告)号：US20240389228A1

公开(公告)日：2024-11-21

申请号：US18691436

申请日：2022-11-30

Applicant: HITACHI ASTEMO, LTD.

Inventor： Akira ISHII ,  Tomio SAKASHITA

IPC: H05K1/11 ,  H05K1/18

Abstract: An electronic control device includes: a circuit board including first and second surfaces structured to be loaded with electronic components; a first capacitor mounted to the first surface of the circuit board; and a second capacitor mounted to the second surface of the circuit board and disposed oppositely to the first capacitor at least partially. The circuit board further includes: a first land disposed in the first surface of the circuit board and connected to the first capacitor; a second land disposed in the second surface of the circuit board and connected to the second capacitor; and a conduction passage establishing electrical continuity from the first land and the second land to a same power source line via the circuit board.