A Novel Bridgeless Single-Stage Step-Up Rectifier

Abstract

This paper proposes a novel bridgeless single-stage step-up voltage rectifier. Rectification, voltage step-up, and power factor correction functions can all be achieved in a single-stage circuit. The proposed circuit could be used as a power supply for high-voltage battery chargers. The proposed circuit topology is based on a conventional voltage doubler. Two voltage doublers are connected in parallel for reducing the output voltage ripple. Two pairs of thyristors are implemented instead of the original diode for controlling the circuit. The analysis of the circuit operating process is demonstrated, and a prototype is built and tested. The experimental results verify that the proposed rectifier has good boost ratio, output voltage ripple, and power efficiency and an acceptable power factor function.