Rotating electric machine control system

By using two inverters connected to open-circuit windings in the rotating motor control system, and using the difference in current wave peak values ​​to determine the faulty capacitor, the problem of difficult identification of smoothing capacitor faults is solved, and the stability and efficiency of motor drive are improved.

CN116648849BActive Publication Date: 2026-05-29AISIN CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AISIN CORP
Filing Date
2022-02-02
Publication Date
2026-05-29

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Abstract

The present invention relates to a rotating electric machine control system. A control unit (1) of a rotating electric machine control system (100) determines that a first smoothing capacitor (41) is in an open-circuit failure when a difference between a first peak value (Ibpp1) of current flowing in a first DC power supply (61) and a second peak value (Ibpp2) of current flowing in a second DC power supply (62) is equal to or greater than a determination threshold value (Idiff_ref) and the first peak value (Ibpp1) is greater than the second peak value (Ibpp2), and determines that a second smoothing capacitor (42) is in an open-circuit failure when the difference between the first peak value (Ibpp1) and the second peak value (Ibpp2) is equal to or greater than the determination threshold value (Idiff_ref) and the second peak value (Ibpp2) is greater than the first peak value (Ibpp1).
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