基于低开关损耗滞环控制三相整流器的研究

Research of Hysteresis Current Control 3-phase PWM Rectifier Based on Low Switching Loss

为了减少三相PWM整流器的开关频率及开关损耗,在研究滞环电流控制方法以及空间矢量控制方法的基础上,提出了改进的空间电压矢量控制方法。该方法通过检测电流误差矢量与参考电压矢量的空间分布给出最佳的电压矢量切换,使电流误差控制在滞环宽度以内;采用空间电压矢量消除相间影响,并且实现简单,无需复杂的矢量变换。仿真及实验结果验证了所提方法的可行性。

In order to reduce the switching frequency and loss of 3-phase PWM rectifier, a novel hysteresis current control method based on hysteresis current control and voltage space vector is proposed. This method gives the optimal space vector by detecting the current error space vector and the system reference voltage space vector, and then controls the current error below the hysteresis width. Voltage space vector is introduced into the control system to eliminate the phase interference, and it can be realized simply without complicated vector transform. The validity of this control method is confirmed by MAT-LAB/SIMULINK simulation and experiments.