公开(公告)号：US12249943B2

公开(公告)日：2025-03-11

申请号：US17540595

申请日：2021-12-02

Applicant: Hitachi Astemo, Ltd.

Inventor： Yuta Nakamura ,  Masatoshi Goto ,  Yoshinori Sagiya ,  Kazunari Kurokawa ,  Shugo Ueno ,  Shintaro Tai

IPC: H02P27/06 ,  H02M1/32 ,  H02P29/024 ,  H02P29/028 ,  H02P29/68

Abstract: A control device that does not require arithmetic processing of a phase current can be provided. A control device in which a plurality of switching legs including a pair of semiconductor switching elements constituting an upper arm and a lower arm are provided in a number corresponding to the number of phases of a motor that is a load includes a switch short circuit detection unit configured to detect a short circuit failure of the semiconductor switching element, and a control unit configured to execute determination processing of determining whether the short circuit failure has occurred in the upper arm or the lower arm on the basis of a result of detection by the switch short circuit detection unit, and to set all the semiconductor switching elements that constitute an arm in which a short circuit failure has occurred on the basis of a result of the determination processing.

公开(公告)号：US11936283B2

公开(公告)日：2024-03-19

申请号：US17528731

申请日：2021-11-17

Applicant: Hitachi Astemo, Ltd.

Inventor： Masatoshi Goto ,  Yuta Nakamura ,  Yoshinori Sagiya ,  Kazunari Kurokawa ,  Shugo Ueno ,  Shintaro Tai

IPC: H02M1/08 ,  H02M1/00 ,  H02M7/537 ,  H02P27/06

CPC classification number: H02M1/08 ,  H02M1/0006 ,  H02M1/008 ,  H02M7/537 ,  H02P27/06

Abstract: A gate driving power source device can be miniaturized by sharing power source units, and a large current can be prevented from locally flowing in a single chip even when a short-circuit failure occurs in a multi-phase conversion circuit included in a power conversion device. There is provided a shared power source unit supplying a shared DC power source to a gate drive circuit provided in any one of a plurality of lower arms of multi-phase conversion circuits or any one of a plurality of upper arms of the multi-phase conversion circuit and gate drive circuits provided in upper arms or lower arms of other conversion circuits.