共直流母线五相双逆变器共模电压抑制策略

由双逆变器驱动的五相开绕组电机在单一直流电压源供电时,PWM矢量调制策略将使逆变系统不可避免地产生共模电压。研究了一种消除五相双逆变器系统共模电压的方法。该方法利用最近四矢量空间矢量脉宽调制以及空间电压矢量解耦的原理将给定参考电压矢量分解为两个大小相等、方向互为144°的等效参考电压矢量,并由两个五相逆变器分别单独产生,以此抑制双逆变器系统共模电压。仿真模型验证了该方法的正确性和有效性。

Common Mode Voltage Suppression Strategy for Five-Phase Dual Inverter with Common DC Bus

When a five-phase open-winding motor driven by a dual inverter which is powered by a single DC voltage source,the PWM vector modulation strategy will inevitably generate common mode voltage in the inverter system.A method to eliminate the common mode voltage of the five-phase dual inverter system was studied.The method used the principle of nearest four vector space vector pulse width modulation and space voltage vector decoupling to decompose a given reference voltage vector into two equivalent reference voltage vectors of equal size and 144°in direction.It was separately generated by two five-phase inverter to eliminate the common mode voltage of the dual inverter system.Simulations verified the correctness and effectiveness of the method.