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摘要
This paper presents an Integrated Derived Boost-Flyback Converter (IDBFC) for high step-up conversion. The circuit topology combines derived boost and flyback converters utilizes a coupled-inductor and a voltage-lift capacitor to achieve a high step-up gain. The proposed converter functions as an active clamp circuit, which alleviates large voltage spikes across the power switches. Thus, the low-voltage-rated MOSFETs can be adopted for reductions of conduction losses and cost. Efficiency improves because the energy stored in leakage inductances is recycled to the output terminal. The primary or secondary side can increase the number of series and parallels to achieve higher voltage gain. Finally, the prototype circuit with a 36- V input voltage, 400- V output, and 500- W output power is operated to verify its performance, and the resulting waveforms and efficiency curves are presented and discussed.
- 出版日期2012-10
