针对车用永磁同步电机逆变器的故障,提出了一种三相四开关容错控制策略。在深入分析了四开关逆变器控制原理的基础上,利用空间矢量脉宽调制(SVPWM)的“七段式”控制策略,实现容错控制。对于电容电压不平衡的问题,提出了多种有效补偿算法,并验证了优化算法。Simulink仿真验证了所提出控制策略的有效性。 Aiming at the fault of the inverter of the permanent magnet synchronous motor vehicle, a three-phase four-switch fault tolerance control strategy is proposed. Based on the in-depth analysis of the control principle of four-switch inverter, fault-tolerant control is implemented by using “seven-stage” control strategy of space vector pulse width modulation (SVPWM). For the problem of unbalanced capacitor voltage, a variety of effective compensation algorithms are proposed and the optimization algorithm is verified. Simulink simulation verifies the effectiveness of the proposed control strategy.