Research on double power frequency ripple suppression method on DC side of single-phase quasi-Z source vehicle charger

In order to eliminate the double power frequency ripple existing in the single-phase quasi-Z source rectifier system and improve the advantage of the motor driver integrated as a charger, this paper proposes a scheme to suppress the double power frequency ripple on the DC side. The active power filter (APF) is composed of one phase bridge arm and auxiliary small inductance capacitor circuit to eliminate the double power frequency ripple. It can not only reduce the inductance current and capacitance voltage ripple coefficient of the integrated charger, but also reduce the volume and cost of the integrated charger system, which greatly improves the advantages of single-phase vehicle integrated charger system.