1차측 환류 다이오드를 제거한 ZVS Three-Level DC/DC 컨버터에 관한 연구

A Study on the Zero-Voltage-Switching Three-Level DC/DC Converter without Primary Freewheeling Diodes

A Zero-Voltage-Switching(ZVS) Three-Level Converter realizes ZVS for the switches with the use of the leakage inductance(or external resonant inductance) and the output capacitors of the switches, however; the rectifier diodes suffer from recovery which results in oscillation and voltage spike. In order to solve this problem, this paper proposes a novel ZVS Three-Level converter, which introduces two clamping diodes to the basic Three-Level converter to eliminate the oscillation and clamp the rectified voltage to the reflected input voltage, the proposed ZVS Three-Level converter can be simplified by removing the two freewheeling diodes.