PIR-based control for three-phase PWM rectifier with H-bridge load

In order to eliminate the pulsating instantaneous power of twice of the output voltage frequency in case of single-phase load, a proportional-integral-resonant (PIR) based controller is proposed in this paper for the PWM rectifier in both the dc-link voltage control loop and the ac current control loop. The resonant regulator is very suitable for tracking the ac component, which provides the optimum input power for the output single phase load. Thus, the pulsating power across the dc-link capacitor can be eliminated, reducing the size and cost of the capacitor. The only information required in the control about the load is the H-bridge output frequency, so the control is easy to implement. Simulation and experimental results show good performance of the proposed control strategy.