基于永磁同步电机的SVPWM死区分析与补偿

Analysis and Compensation of the Dead-time Effect in SVPWM Based on PMSM

在理想和实际情况下,按电流方向的不同,分析了死区效应对空间电压矢量脉宽调制逆变器控制的永磁同步电机输出波形的影响。根据电流空间矢量图将三相电流分成6个区域,并在各区域中按电流方向对三相输出电压进行补偿。实验结果表明,该方法避免了系统软硬件复杂程度的增加,同时达到了很好的效果。

The dead-time effect on the output waveform of the PMSM controlled by SVPWM inverter was analyzed with different current directions under ideal and real circumstance respectively. It advised a compensa- tion strategy of its effect, which divides three-phase current into six regions according to the space vector fig- ure of current, and compensated three-phase voltage in each region in terms of current directions. Experiments results show that this strategy can get good compensation effect without increasing the complexity of both software and hardware of original system.