A High-efficient Duty-controlled Synchronous Rectifier for Uniformly Powering of Multiple Receivers

Abstract

A high-efficient synchronous rectifier in the receivers, which controls the duty cycle of the rectifier to modulate the load voltage, is proposed in this paper. The proposed rectifier can be utilized to reduce the conduction loss of the switching devices, and to control the load voltage with a simple control circuit. Thus, the load voltage of multiple rectifiers, which are connected in parallel each other, can be regulated for uniformly powering of the receivers under multiple wireless charging condition. In this paper, the new control method of two AC/DC rectifiers installed in the railway vehicle was introduced and verified by simulation. As a result, the uniformly powering of the two rectifier was achieved for 500kW load power delivery by the proposed rectifier with 97.0% of power efficiency, although each receiver has different magnetic field in the railroad track.