Title:
ELECTRIC POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/004208
Kind Code:
A1
Abstract:
This electric power conversion device having an arm pair (3) in which a first semiconductor switching element (M1) and a second semiconductor switching element (M2) are connected in series between a DC plus terminal and a DC minus terminal is configured to comprise: a third resistance group (6) that is connected in parallel with the first semiconductor switching element (M1); a second resistance group (5) that is connected in parallel with the second semiconductor switching element (M2); a reference-voltage-generating circuit (4) that generates a first reference voltage and a second reference voltage in which a voltage between the plus terminal and the minus terminal is divided; and an abnormality determination unit (11) that, after both semiconductor switching elements (M1, M2) have stopped operating, compares a detection voltage that is divided by the second resistance group (5) and the first and second reference voltages, and determines whether either of the semiconductor switching elements has undergone main breakdown voltage deterioration.
Inventors:
ONDA KOHEI (JP)
Application Number:
PCT/JP2022/026483
Publication Date:
January 04, 2024
Filing Date:
July 01, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M1/08; H02M7/48
Domestic Patent References:
| WO2011121765A1 | 2011-10-06 |
Foreign References:
| JPH10257779A | 1998-09-25 | |||
| JPH04198772A | 1992-07-20 | |||
| JP2014127728A | 2014-07-07 | |||
| JP2000065865A | 2000-03-03 | |||
| JP2019054665A | 2019-04-04 | |||
| JPH05219752A | 1993-08-27 |
Attorney, Agent or Firm:
PALMO PATENT FIRM, P.C. (JP)
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