中文摘要：

为了提高四相永磁容错电机（FTPMM）在系统正常工作时的控制性能,在分析其结构和原理的基础上,建立了其在旋转坐标系下的数学模型,为实现电流、磁链、转矩的解耦控制创造了条件,设计了基于H桥的容错驱动,提出了一种新颖的四相永磁容错电机的电压空间矢量脉宽调制（SVPWM）策略,并巧妙设计了零矢量的插入顺序和重合矢量的选择顺序,方便了数字信号处理器（DSP）的实现。仿真和试验结果证明了在系统正常工作时该方法的正确性和优越性。

英文摘要：

In order to enhance the performance of the four-phase fault-tolerant permanent magnet motor （FTPMM） in normal conditions, a study is first made of the structure and principle of the four-phase FTPMM, and its mathematical model is presented to decouple its current, stator flux and torque. Then a novel voltage space vector pulse width modulation （SVPWM） method for the four-phase FTPMM driven by H bridges is proposed, and the insertion sequence of the zero vectors as well as the performance sequence of the coincidence- sector is designed to facilitate its digital signal processor （DSP） implementation. To verify the effectiveness of the control strategy in normal conditions, some simulations and experiments are developed and the results show satisfactory static and dynamic performance of the system.