DC-DC High Conversion Ratio Push-Pull Resonant Converter Based on Voltage Double Rectifier

Abstract

A DC-DC high conversion ratio push-pull resonant converter with voltage double rectifier is presented. The main function of the proposed converter is to convert a low voltage direct current (DC) from the battery into a high-voltage DC with the isolated high-frequency transformer and the voltage double rectifier. The metal-oxide-semiconductor field-effect transistors (MOSFETs) and diodes can be operated under the zero-current-switching (ZCS) condition. The leakage inductor of the high-frequency transformer can be employed in one part of the soft-switching operation. A prototype for a 245- W high-gain converter has been developed and tested to evaluate the performance of the presented approach. The proposed converter was operated with a 220 kHz fixed switching frequency, a 12 VDC input voltage, a 370 VDC. The designed DC-DC high conversion ratio push-pull resonant converter with voltage double rectifier had a measured efficiency of approximately 96% near full power.