Title:
FAULT DIAGNOSIS METHOD, POWER CONVERSION DEVICE, MOTOR MODULE AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/064748
Kind Code:
A1
Abstract:
A fault diagnosis method of the present disclosure diagnoses a fault of an H bridge having 4 switch elements. The fault diagnosis method includes: an acquisition step for acquiring a current/voltage represented in a dq coordinate system, acquiring a first actual voltage indicating a voltage across terminals of one low side switch element and a second actual voltage indicating a voltage across terminals of the other low side switch element, and acquires a rotation speed of the motor; and a diagnosis step for diagnosing a fault of the 4 switch elements on the basis of the acquired current/voltage in the dq coordinate system, the first actual voltage, the second actual voltage, and the acquired rotation speed.
Inventors:
GHADERI AHMAD (JP)
Application Number:
PCT/JP2018/023721
Publication Date:
April 04, 2019
Filing Date:
June 22, 2018
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02M7/48; B62D5/04
Domestic Patent References:
| WO2017150638A1 | 2017-09-08 | |||
| WO2016152523A1 | 2016-09-29 |
Foreign References:
| JP2016019385A | 2016-02-01 | |||
| JP2011078221A | 2011-04-14 | |||
| JP2011025872A | 2011-02-10 |
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