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Diagnostic strategy and modeling of PMSM stator winding fault in electric vehicles

Permanent Magnet Synchronous Motor (PMSM) as the key component of the Electric Vehicles (EVs), has numerous advantages over other synchronous motors. Fault diagnosis is essential to guarantee the safety and continuity of the operation for EVs. An undetected fault in the PMS M system may lead to high repair cost, or even catastrophic failure. Among lots of faults in the PMSM, the most serious are short circuit faults, such as inter-turn fault, phase-to-ground fault. If it is not detected in time, the inter-turn fault may lead to phase-to-ground fault. For the PMSM, the early detection of motor failure has a very important significance. In this paper, the mathematic model and the phase-to-ground fault model of PMSM in abc coordinates is proposed, and the corresponding model is established based on MATLAB /Simulink. The zero-sequence voltage component (ZSVC) is analyzed in the inter-turn fault, which provides the basis for the fault diagnosis of PMSM.