Abstract—This paper introduces a novel method to achieve sensorless speed control of a Five-phase Permanent Magnet Synchronous Motor (PMSM) drive in case of a single-phase open-circuit fault regardless which phase is open. The motor performance when an open circuit fault occurs is as good as it is before the fault. The degradation in motor performance, when an open circuit fault occurs, is minimized due to implementing a novel control technique that is using the four remaining healthy currents. This strategy includes introducing two software modifications to the operation of the five motor post the fault. Firstly, an asymmetric SVPWM is used post the fault instead of multi-dimension SVPWM that is used before the fault. Secondly, a new algorithm is introduced to track the saliency post the fault. The new algorithm is considering the application of the new modulation technique. Moreover, it uses only the excitation in the healthy currents of the motor due to the IGBT switching actions. Simulation results presented in this paper shows that the performance of the motor over a wide speed range and at different load conditions is maintained post the fault.

中文翻译：

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容错五相 PMSM 驱动器的无传感器速度控制

摘要——本文介绍了一种在发生单相开路故障时实现五相永磁同步电机 (PMSM) 驱动器无传感器速度控制的新方法，无论哪一相开路。发生开路故障时的电机性能与故障前一样好。由于采用了使用剩余的四个正常电流的新型控制技术，因此在发生开路故障时，电机性能的下降被最小化。该策略包括对故障后五个电机的操作引入两个软件修改。首先，故障后使用非对称 SVPWM，而不是故障前使用的多维 SVPWM。其次，引入了一种新的算法来跟踪故障后的显着性。新算法正在考虑新调制技术的应用。此外，由于 IGBT 开关动作，它仅使用电机健康电流中的励磁。本文中的仿真结果表明，电机在很宽的速度范围内和在不同负载条件下的性能在故障后得以保持。