Multiphase drive systems have been proposed in high power safety-critical applications because of their excellent fault-tolerant ability. This paper concentrates on speed sensorless fault-tolerant control algorithm of multiphase induction machine. A full-order adaptive observer is adopted to observe the rotor flux and rotor speed, and a virtual winding method is proposed to re-build the symmetrical model when one or several phases are absent in fault mode so that the machine in fault can be dealt as a normally symmetrical machine with some virtual windings. Compared with traditional fault-tolerant control methods, the proposed method can realize precise current control and flux observation under the phase failure condition. Finally, experiments are performed on a five-phase distributed winding induction machine platform. The results demonstrate that the proposed control algorithm can significantly reduce the torque ripple and maintain a relatively stable operation when one phase or two phases are in phase failure condition and without the speed sensor.


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    Title :

    Sensorless fault-tolerant control of multiphase induction machine using virtual winding and adaptive observer


    Contributors:
    Peng, Zhong (author) / Zheng, Zedong (author) / Li, Yongdong (author) / Liu, Zicheng (author)


    Publication date :

    2017-08-01


    Size :

    1467113 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English