非隔離型耦合電感之高昇壓直流-直流
功率轉換器研製

本論文提出一非隔離式高電壓增益轉換器之電路設計，其電路架構係利用耦合電感、箝位電路及倍壓電容結合，達到高電壓增益輸出。另外，本電路架構僅需單組脈波寬度調變訊號作為功率開關控制，故電路設計簡易；當開關截止時具有能量回送機制，將由漏感所產生的突波能量回收；主動式開關可以減少功率元件的電壓應力，因此減少電路損耗，以進一步提升電路的轉換效率。另外，亦可經由耦合電感增加圈數比來獲得更高的電壓增益。其電路之動作原理分析、實驗波形與效率曲線圖將在本文內容中詳述。最後，實作電路以輸入電壓48 V、輸出電壓400 V、滿載功率1000 W之原型電路，並應用在輕型電動車上，驗證其效能及可行性。經實驗結果顯示，最高效率可高達96.5 %，滿載效率亦可達到92.3 %。

關鍵字

高電壓增益；耦合電感；箝位電路；倍壓電容

並列摘要

This thesis is to present a non-isolated single switch converter with high voltage gain. Its circuit topology is combined with coupled-inductor, clamp circuit and voltage lift capacitor techniques. The proposed converter has several advantages: First, the circuit controlled by only a single pulse width modulation (PWM) for the power switch. This design keeps the circuit simple and achieves a high voltage gain. Second, the proposed converter functions as clamp circuit so that the energy of the leakage inductance can be recycled to the capacitor. The voltage spike on the active switch is also suppressed and the efficiency is improved because of recycling the leakage energy. To deserve, the coupled-inductor can be adjusted by increasing the turn ratios of the secondary-side winding or third-side winding to achieve higher voltage gain feature. The operating principles, theoretical analysis, experimental waveforms and efficiency curves are presented. Finally, a prototype to verify the performance of the proposed converter with input voltage 48 V, output voltage 400 V and output power 1k W is implemented. As a result, the maximum efficiency is up to 96.5 % and full load efficiency is 92.3 %.

並列關鍵字

High voltage gain ； Coupled-inductor ； Clamp Circuit ； Voltage-lift capacitor

參考文獻

[2] W. Li, X. Lv, Y. Deng, J. Liu, and X. He, “A Review of Non-Isolated High Step-Up DC/DC Converters in Renewable Energy Applications.” Paper presented at the Applied Power Electronics Conference and Exposition, 2009.

[3] Z. Qun and F. C Lee, “High-efficiency, high step-up DC-DC converters.” Power Electronics, IEEE Transactions on, 18(1), 65-73, 2003.

[4] R. J. Wai and R. Y. Duan, “High-efficiency DC/DC converter with high voltage gain.” Electric Power Applications, IEE Proceedings, 152(4), 793-802, 2005.

[5] R. J. Wai and R. Y. Duan, “High step-up converter with coupled-inductor. Power Electronics, IEEE Transactions on, 20(5), 1025-1035, 2005.

[6] R. J. Wai, L. W. Liu and R. Y. Duan, “High-efficiency Voltage-clamped DC-DC converter with reduced reverse-recovery current and switch-Voltage stress,” Industrial Electronics, IEEE Transactions on, 53(1), 272-280, 2006

國際替代計量

非隔離型耦合電感之高昇壓直流-直流功率轉換器研製

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