| Summary: | 碩士 === 國立高雄第一科技大學 === 電子工程研究所 === 104 === A novel isolated bidirectional DC/DC converter for the power application that needs battery back-up is proposed in this thesis. The proposed converter is derived from conventional Boost converter and Buck-Boost converter. By integrating three-winding coupled inductor and switched capacitor into the power stage, the proposed converter can achieve high-ratio voltage conversion without excessive duty cycle or high transformer turns ratio. In addition, the energy stored in the leakage inductor can be recycled without additional snubber. By recycling the leakage inductor energy, the switches can be turned ON under zero-voltage switching condition. It is significant to improve the conversion efficiency. The operation principle and steady-state analysis of the proposed converter will be described in detail in this thesis. Based on the design considerations, a 200-W prototype is built and tested. To validate the correctness of the theoretical analysis in this thesis, the experimental results from the prototype will be compared with the illustrations generated by PSIM simulator.
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