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Remedial Brushless AC Operation of Fault-Tolerant Doubly Salient Permanent-Magnet Motor Drives

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5 Author(s)
Wenxiang Zhao ; Sch. of Electr. & Inf. Eng., Jiangsu Univ., Zhenjiang, China ; Chau, K.T. ; Ming Cheng ; Jinghua Ji
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The doubly salient permanent-magnet (DSPM) machine is a new class of stator-PM brushless machines, which inherently offers the fault-tolerant feature. In this paper, a new operation strategy is proposed and implemented for fault-tolerant DSPM motor drives. The key is to operate the DSPM motor drive in a remedial brushless ac (BLAC) mode under the open-circuit fault condition, while operating in the conventional brushless dc mode under normal condition. Both cosimulation and experimental results confirm that the proposed remedial BLAC operation can maintain the average torque, reduce the torque ripple, and retain the self-starting capability under the open-circuit fault.

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Industrial Electronics, IEEE Transactions on  (Volume:57 ,  Issue: 6 )