Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/254508
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a power conversion device capable of further decreasing, compared to the prior art, misdetection of failures in a chopper circuit which constitutes phases. In order to achieve the foregoing, the present invention comprises: a multi-phase transformer circuit in which a plurality of chopper circuits are connected in parallel according to the number of phases; a drift detection unit which detects drift in a phase current in each chopper circuit; and a failure detection unit which variably sets a failure threshold value according to a state quantity of the chopper circuit, and which detects a failure in the chopper circuit by comparing the drift with the failure threshold value.
Inventors:
MIYATA YUJI (JP)
NAKAMURA YUTA (JP)
GOTO MASATOSHI (JP)
KUROKAWA KAZUNARI (JP)
SAGIYA YOSHINORI (JP)
KATO TAKUMA (JP)
NAGASAWA KAZUYA (JP)
NAKAMURA YUTA (JP)
GOTO MASATOSHI (JP)
KUROKAWA KAZUNARI (JP)
SAGIYA YOSHINORI (JP)
KATO TAKUMA (JP)
NAGASAWA KAZUYA (JP)
Application Number:
PCT/JP2021/020656
Publication Date:
December 08, 2022
Filing Date:
May 31, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02M3/155
Domestic Patent References:
| WO2019244614A1 | 2019-12-26 |
Foreign References:
| JP2020005475A | 2020-01-09 | |||
| JP2019024283A | 2019-02-14 | |||
| JP2013046541A | 2013-03-04 | |||
| JP2019169997A | 2019-10-03 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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