Study of Three-Phase PWM Rectifier Based on Dual-Mode Control

The design of the voltage loop and current loop of three-phase high power factor PWM rectifier was introduced, the strategy of dual-mode control that combine fuzzy control to PI regulator is proposed, which use fuzzy controller to obtain quick dynamic response when deviation is in small range and adopt PI regulator to realize no static error when deviation is in long range, improving the control accuracy of direct current voltage. The simulation and experiment results showed that the improved performance was superior to the traditional PI controller, it worked well with high dynamic and static performance, because of its advantage in quick response and good robustness.