雙向諧振直流轉換器之設計與研製

Abstract

近年來，再生能源系統常用於各種場合來發電，如偏遠地區、輪船、汽車設備等。而雙向直流轉換器在再生能源系統扮演一關鍵的角色，透過其雙向電力傳輸的能力，能使整個系統發電更可靠與穩定。

本論文設計與研製一雙向諧振直流轉換器，電路拓撲由推挽式電路、半橋電路、諧振電感與諧振電容所組成，其具有雙向高轉換比、電氣隔離與柔性切換能力。為了驗證此轉換器，本文首先分析其特性，再利用Psim軟體來模擬，最後實作一台額定功率為1k W、低壓側為50V、高壓側為400V的雙向直流諧振轉換器，並利用數位訊號處理器 TMS320F28069 做控制處理。由實測結果可知，當轉換器工作於升壓模式時效率最高為94.5%，在降壓模式時效率最高為94.8%。

In recent years, renewable energy systems is commonly used to generate electricity in many places, such as in remote areas, ships, cars equipment and so on. The bidirectional DC (BDC) converter play an important role in renewable energy systems, its bidirectional power transmission ability can make the renewable energy system more reliable and stable for power generation.

The main theme of this thesis is to design and implementation a bidirectional resonant DC converter, the topology consists of push-pull, half-bridge , the resonant inductor and resonant capacitor. The converter has a high conversion ratio, electrical isolation and soft switching capability. In order to verify this converter, this paper analyzes the characteristics by Psim software to simulate the circuit. At last, a rated power of 1k W, low-voltage to 50V, high voltage test for the bi-directional DC resonant converters 400V is implemanted, and also using DSP TMS320F28069 to control. By the pratical experiment, it showed the result that when the converter operating in boost mode, the efficiency up to 94.5%. when the converter operating in buck mode,the efficiency up to 94.8%.