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

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.