电流型脉宽调制整流器间接电流控制改进策略

An Improved Indirect Current Control Strategy for Current Source PWM Filter

针对传统三相电流型脉宽调制整流器间接电流控制存在受主电路参数L、C变化影响大使得系统精度得不到提高的问题,采用间接电流控制改进策略,在每相调制信号中引入延时角,使得控制得到简化,系统精度得到改善。通过对电动汽车用磷酸铁锂动力电池组进行相关充电实验,验证了该控制策略的可行性和合理性。

To solve the defect of insufficient system accuracy of traditional three-phase current source PWM rectifier due to the evident affects of parameter variation of filter inductance and filter capacitor in main circuit on indirect current control, a improved indirect current control strategy is proposed, in which the delay-angle is introduced into modulation signal of each phase to simplify the control and improve system accuracy. Both feasibility and rationality of the proposed improved control strategy are verified by charging experiments of lithium iron phosphate power batteries for electric vehicle.