五桥臂逆变器驱动双三相永磁同步电机系统双零序电压注入PWM策略

A Double Zero-sequence Voltage Injection PWM Strategy for a Five-leg Inverter Supplying Dual Three-phase Permanent Magnetic Synchronous Motor

目前,针对五桥臂逆变器驱动两台三相电机系统PWM策略的研究多是基于空间矢量脉宽调制(space vector pulse width modulation,SVPWM)进行分析,然而实际上基于载波脉宽调制(carrier-based pulse width modulation,CBPWM)分析更为直接有效。该文构建了一种基于CBPWM的五桥臂逆变器驱动双三相电机系统双零序注入PWM策略,包括均值连续PWM和3种不连续PWM方式,并对其直流母线电压利用率进行了分析,实验结果验证了控制策略的有效性和可行性。该文提出的PWM策略对五桥臂逆变器驱动两台独立三相电机系统同样有效。

At present, most pulse width modulation（PWM） strategies for a five-leg inverter driven two three-phase motors are based on space vector pulse width modulation（SVPWM）. In fact, the analysis is direct and effective based on carrier-based pulse width modulation（CBPWM）. In this paper, a dual zero-sequence injection PWM strategy based on CBPWM for a five-leg inverter supplying dual three-phase PMSM was proposed, including mean continuous PWM and three kinds of discontinuous PWM modes, and the bus voltage utilization ratio is analyzed. Experimental results demonstrated the effectiveness and feasibility of the proposed control strategy.The PWM strategy proposed in this paper is also effective for a five-leg inverter fed two three-phase motors.