公开(公告)号：US20220311355A1

公开(公告)日：2022-09-29

申请号：US17638403

申请日：2020-07-31

Applicant: Hitachi Astemo, Ltd.

Inventor： Norio MURAYAMA ,  Takeshi YOSHIDA ,  Takahiro NISHIDA ,  Itsuro NOMURA

IPC: H02M7/537 ,  H02M1/08

Abstract: An object of the present invention is to provide a power conversion device capable of specifying a failure location of an inverter in detail when an attempt of active discharge fails. There are provided an arithmetic operation circuit 102 that outputs a discharge instruction to control a discharge operation based on a voltage between both ends of a discharge circuit, and an output circuit 203 that outputs a drive signal based on the control signal. The arithmetic operation circuit 102 monitors an amount of the decreased voltage between both the ends of the discharge circuit, an LV read back signal being an output of the arithmetic operation circuit 102, and an HV read back signal being an output of the output circuit 203, and specifies a failure location.