不对称缺相运行的容错策略在多相感应电机中的应用

APPLICATION OF FAULT TOLERANT STRATEGY OF ASYMMETRIC PHASE LOSS OPERATION IN MULTIPHASE INDUCTION MOTOR

多相感应电动机因具有结构简单、可靠性高﹑转矩脉动低和容易使用低压功率电器实现大功率等优点,现已广泛应用于各大动力推进系统。本文根据对推进电机的容错控制策略要求,建立了绕组回路电压方程的矩阵模型,提出三步合成电流法用于分析多相感应电动机磁势,重点分析了不对称缺相运行的稳态性能,并对其不对称缺相运行时产生的容错电流和控制策略进行了理论分析和仿真试验。研究结果表明:该控制策略有效的抑制了缺相带来的转矩和电流的波动,在提高电机稳定运行性能具有一定的有效性和实用性。

Because of its simple structure,low torque ripple,high reliability and easy use of low-voltage electrical appliances to achieve high power,multiphase induction motors have been widely used in large power propulsion systems.Based on the fault-tolerant control strategy requirements of the propulsion motors,a matrix model of the winding circuit voltage equation was established in this paper,and a three-step synthetic current method was proposed to analyze the magnetic potential of a multiphase induction motor,especially for the steady-state performance of the asymmetrical phase-deficient operation.The fault-tolerant current and control strategy generated during asymmetric phase loss operation were theoretically analyzed and simulated.The results show that the control strategy can effectively suppress the torque and current fluctuations caused by phase loss,and has certain effectiveness and practicability in improving the stability of the motor.