公开(公告)号：US20240154562A1

公开(公告)日：2024-05-09

申请号：US18549462

申请日：2021-12-27

Applicant: HITACHI ASTEMO, LTD.

Inventor： Yukio HATTORI ,  Hirohito IMAI

IPC: H02P27/08 ,  H02P25/22

CPC classification number: H02P27/08 ,  H02P25/22

Abstract: A motor drive device which drives a motor including a winding set and a winding set that are electrically separate from each other includes an inverter that outputs three-phase alternating currents to winding set, an inverter that outputs three-phase alternating currents to winding set, and controllers that output drive commands to inverter and inverter by generating PWM pulses. Controllers generate the PWM pulses such that the three-phase alternating currents that are output from inverter to winding set and the three-phase alternating currents that are output from inverter to winding set have reverse polarities in three respective phases.

公开(公告)号：US20230059509A1

公开(公告)日：2023-02-23

申请号：US17797148

申请日：2020-10-23

Applicant: Hitachi Astemo, Ltd.

Inventor： Akira MIMA ,  Yukio HATTORI ,  Eiichi IDE

IPC: H02M7/00 ,  H02K11/33 ,  H02K5/22

Abstract: An object of the present invention is to provide a power conversion device configured to attain suppression of heat concentration and miniaturization of the device. The power conversion device 40 includes a power module 17 for converting dc power into ac power, a first circuit substrate (power circuit substrate) 16 including a capacitor 31 for smoothing the dc power, and a casing 20 for storing the power module 17 and the first circuit substrate 16. Either the first circuit substrate 16 or the power module 17 is disposed on an inner surface 20bb of a side wall 20b having an outer wall surface 20ba of the casing 20, and the other is disposed on a predetermined inner wall surface 20a of the casing 20 to form an angle with the inner surface 20bb.