A Zero-Voltage-Switching Resonant Flyback Converter with Single Magnetic Component

作者：Do Hyun Lark^*

来源：International Review of Electrical Engineering, 2011, 6(2): 624-629.

• Flyback Converter
• Soft-Switching
• Zero-Voltage-Switching
• Zero-Current-Switching

A zero-voltage-switching (ZVS) resonant flyback converter with single magnetic component is presented in this paper. In the proposed converter, a simple auxiliary circuit consisting of an auxiliary switch and a resonant capacitor is added to a conventional flyback converter. By utilizing the resonance between the leakage inductance of transformer and the resonant capacitor, ZVS operation of both main and auxiliary switches and zero-current-switching (ZCS) operation of an output diode are achieved. Therefore, switching loss is significantly reduced and the proposed converter provides high efficiency. Moreover, the voltages across the power switches are clamped as the resonant capacitor voltage and the output diode voltage is also clamped without any auxiliary circuits. Detailed analysis and design of the proposed converter are carried out. A prototype of the proposed converter is developed, and its experimental results are presented for validation.

• 出版日期2011-4