Title:
FAILURE DIAGNOSTIC METHOD, POWER CONVERTING DEVICE, MOTOR MODULE, AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/220782
Kind Code:
A1
Abstract:
This failure diagnostic method according to an embodiment of the present disclosure diagnoses a failure of a power converting device 1000 which converts power from a power source 101 into power to be supplied to a motor 200. The failure diagnostic method includes: a step for determining whether there is a failed phase among one or more phases; a step for determining whether there is a failed part among the high side and the low side of at least one H-bridge; a step for determining whether there is a failed inverter among a first inverter and a second inverter; and a step for determining whether there is a failed switching element on the basis of the determination result of whether there is a failed phase, the determination result of whether there is a failed part, and the determination result of whether there is a failed inverter.
Inventors:
GHADERI AHMAD (JP)
Application Number:
PCT/JP2019/013062
Publication Date:
November 21, 2019
Filing Date:
March 27, 2019
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02M7/48; B62D5/04; H02M1/00
Domestic Patent References:
| WO2017150638A1 | 2017-09-08 |
Foreign References:
| JP2014192950A | 2014-10-06 | |||
| JP2011025872A | 2011-02-10 | |||
| JP2011078221A | 2011-04-14 |
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