基于有功功率反馈的异步电机双PWM变频调速系统

Asynchronous Motor Double PWM Variable Frequency Speed Regulation System Based on Active Power Feedback

介绍了基于有功功率反馈的双PWM变频调速系统,该方法通过整流器和逆变器的功率平衡控制,将逆变器的有功功率直接反馈到整流器的电流环给定上,推导了整流器电流环给定值的计算公式。该方法可以有效抑制直流侧电压的波动,提高系统的抗扰性能及动态反应速度。与常规双PWM变流器的对比试验,表明了该控制方法的有效性。

A double PWM control converter based on active power directly feedback was introduced, the active power of the inverter was directly feedback to the current loop given of the rectifier through the balance control of the rectifier and inverter. In addition, the calculation formula of rectifier current loop given value was deduced in the research. This method can effectively restrain the volatility of the voltage dc side, improve the anti-disturbance performance and dynamic response speed. The experimental results comparison between this method and the conventional method showed that the method is effective.