Title:
METHOD FOR ESTIMATING PARTIAL DISCHARGE FACTOR OF POWER SEMICONDUCTOR MODULE, AND DEVICE FOR ESTIMATING PARTIAL DISCHARGE FACTOR OF POWER SEMICONDUCTOR MODULE
Document Type and Number:
WIPO Patent Application WO/2023/171037
Kind Code:
A1
Abstract:
Provided is a method for estimating a partial discharge factor of a power semiconductor module, by which a partial discharge factor can easily and automatically be estimated using time series data regarding the discharged charge quantity during a partial discharge test. This method for estimating a partial discharge factor of a power semiconductor module, by which a partial discharge factor during a partial discharge test of the power semiconductor module is estimated, is characterized by having: (a) a measurement step in which a test voltage pattern in which the voltage pattern varies is applied to the power semiconductor module, and the quantity of charge that is due to partial discharge of the power semiconductor module is measured; (b) a feature quantity extraction step in which a plurality of feature quantities are extracted, said plurality of feature quantities including at least a first feature quantity that is the average value of the quantity of charge in a first period, and a second feature quantity that is the average value of the quantity of charge in a second period; and (c) an estimation step in which a partial discharge factor is estimated on the basis of the plurality of feature quantities.
Inventors:
YAGI DAISUKE (JP)
NAOE KAZUAKI (JP)
KUSUKAWA JUNPEI (JP)
SAKURAI SHUN (JP)
MURAMOTO AKIHIRO (JP)
NAOE KAZUAKI (JP)
KUSUKAWA JUNPEI (JP)
SAKURAI SHUN (JP)
MURAMOTO AKIHIRO (JP)
Application Number:
PCT/JP2022/041486
Publication Date:
September 14, 2023
Filing Date:
November 08, 2022
Export Citation:
Assignee:
HITACHI POWER SEMICONDUCTOR DEVICE LTD (JP)
International Classes:
G01R31/12
Domestic Patent References:
| WO2022190768A1 | 2022-09-15 | |||
| WO2022164663A1 | 2022-08-04 |
Foreign References:
| JP2013142673A | 2013-07-22 | |||
| JPH11237430A | 1999-08-31 | |||
| JP2018185223A | 2018-11-22 | |||
| JP2016212052A | 2016-12-15 | |||
| JP2019191142A | 2019-10-31 | |||
| JPH05256895A | 1993-10-08 | |||
| JP2013134156A | 2013-07-08 | |||
| JP2017022310A | 2017-01-26 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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