双三相永磁同步电机多矢量控制技术研究

Study on Multi-vector Control Technique for Dual Three-phase Permanent Magnet Synchronous Motor

传统空间矢量调制技术只控制α-β平面的电压参考矢量,忽视了x-y平面的电压参考矢量,因此x-y平面产生较大的电流谐波分量,导致电机定子铜耗增加,影响电机控制性能。以双三相永磁同步电机为研究对象,采用2种4矢量SVPWM调制策略,同时控制α-β平面和x-y平面的电压参考矢量。结合电机解耦数学模型和基于id=0的矢量控制技术,对双三相永磁同步电机调速系统进行仿真分析。结果表明,两种SVPWM控制算法能够提高直流母线电压的利用率,输出电压接近正弦,电磁转矩脉动小,电流谐波含量少,定子铜耗低,验证了该方法的可行性和有效性。

The voltage reference vectors in α-β plane are controlled according to the traditional space vector pulse width modulation （SVPWM） technique for dual three-phase permanent magnet synchronous motor （PMSM）, but some are neglected in x-y plane. Therefore, some larger current harmonic components in x-y plane are produced, this lead to increase the copper consumption in stator windings and the control performance of the PMSM become bad. Taking the dual three-phase PMSM as the study object and adopting two kinds of four-vector SVPWM strategies, these voltage reference vectors both in α-β and in x-y plane were controlled at the same time. The PMSM decoupling model and the vector control method based on id=0 were used to control the dual three-phase PMSM in variable speed system. Simulation results show that both of the two SVPWM strategies can improve the DC bus utilization. The output voltage is approaching the standard sinusoidal, the harmonic components are fewer and the copper consumption is lower. Its effectiveness and feasibility are validated.