Title:
FAILURE DIAGNOSTIC METHOD, POWER CONVERTING DEVICE, MOTOR MODULE, AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/220780
Kind Code:
A1
Abstract:
This failure diagnostic method according to an embodiment of the present disclosure diagnoses a failure in a power converting device 1000 that converts power from a power source 101 into power to be supplied to a motor 200. The failure diagnostic method includes: an acquisition step for acquiring a first actual voltage VA1 which indicates the voltage at both ends of a first low-side switching element SW_A1L, a saturation voltage Vsat of the first low-side switching element, and a voltage peak value Vpeak determined on the basis of a d-axis voltage and a q-axis voltage in a dq-coordinate system; and a diagnosis step for diagnosing the presence of a failure of a second inverter 130 on the basis of the first actual voltage, the saturation voltage, and the voltage peak value.
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Inventors:
GHADERI AHMAD (JP)
Application Number:
PCT/JP2019/013060
Publication Date:
November 21, 2019
Filing Date:
March 27, 2019
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2017150638A1 | 2017-09-08 |
Foreign References:
| JP2007060866A | 2007-03-08 | |||
| JP2013215040A | 2013-10-17 |
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