发明名称 |
Torque current comparison for current reasonableness diagnostics in a permanent magnet electric machine |
摘要 |
A method and system for diagnostics and ascertaining status of an electric machine coupled to a polyphase bus. The method and system include: detecting a rotational position with a position encoder coupled to the electric machine; controlling an inverter having an input coupled to a direct current bus and an output coupled to the polyphase bus, where the inverter is responsive to commands from a controller coupled to the inverter and to the position encoder. The method and system further include measuring a current from the direct current bus; capturing a torque current; calculating a current error; establishing a bound limit for the torque current; comparing the current error to the bound limit. The method and system also include: determining whether a fault exists by evaluating if the bound limit has been exceeded; incrementing a fault counter if a fault exists; decrementing a fault counter if no fault exists; and indicating a failure if the fault counter exceeds a predetermined limit.
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申请公布号 |
US6392418(B1) |
申请公布日期 |
2002.05.21 |
申请号 |
US20000663448 |
申请日期 |
2000.09.15 |
申请人 |
DELPHI TECHNOLOGIES, INC. |
发明人 |
MIR SAYEED A.;SKELLENGER DENNIS B.;MC CANN ROY ALAN;COLOSKY MARK PHILIP |
分类号 |
B62D5/04;G01D3/08;H02P6/00;(IPC1-7):G01R31/00;G01B7/30 |
主分类号 |
B62D5/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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