具零電壓切換電流饋入式升壓轉換器在雙向直流/直流轉換之研製

Realization of a ZVS Current-Fed Boost Converter for Bi-directional DC/DC Converter

江大任(Ta-Jen Chiang)

指導教授 ： 謝冠群 ； 謝宏毅

中原大學/電機資訊學院/電機工程研究所/碩士(2017年)

https://doi.org/10.6840/cycu201700466

摘要

本論文旨在改善雙向全橋DC/DC轉換器的升壓轉換特性，並保持相移降壓轉換(Phase-shift buck conversion)的優良特性。升壓轉換係採準諧振全橋電流饋入(Quasi-resonant full-bridge current-fed)方式並以定截止時間控制(Constant-off time control)達成準諧振能量轉換，同時使開關以零電壓切換(Zero-voltage switching, ZVS)提升轉換效率。本研究並研製一部輸出功率為1 kW之全橋雙向DC/DC轉換器以驗證所提之方法，其中低壓側直流埠為48V而高壓側直流埠為380V；最後並以原架構進行相移降壓轉換的特性測試。實驗結果證實所提之升壓模式的最高轉換效率可及90%，而降壓模式之最高轉換效率為88%。

關鍵字

雙向全橋DC / DC轉換器 ； 準諧振 ； 電流饋電 ； 相移轉換 ； 零電壓開關

並列摘要

Thesis is to improve the boost conversion characteristics of the bidirectional full-bridge DC / DC converters and to maintain the excellent behavior of the phase-shifted buck conversion. Quasi-resonant full-bridge current-fed method is adopted to achieve the boost energy conversion with constant-off time control, while the switches are commutated at zero-voltage-switching (ZVS) to enhance the conversion efficiency. In this study, a full-bridge bidirectional DC / DC converter with output power of 1 kW is implemented to verify the proposed method, where the low-side DC bus is 48V and the high-side DC bus 380V. Finally, the phase-shifted buck conversion is also tested in the same circuit topology. The experimental results confirm that the maximum conversion efficiency of the boost mode is 90%, while that of the buck mode is 88%.

並列關鍵字

Bidirectional full-bridge DC / DC converters ； Quasi-resonance ； current-fed ； phase-shifted conversion ； zero-voltage switching

參考文獻

[2] J. Huang, Y. Wang; Z. Li, W. Lei,“Unified Triple-Phase-Shift Control to Minimize Current Stress and Achieve Full Soft-Switching of Isolated Bidirectional DC–DC Converter”, IEEE Trans. Ind. Electron., vol. 63, no. 7, pp. 4169 - 4179, 2016.

[3] H. Wu, K. Sun, L. Chen, L. Zhu, Y. Xing, “High Step-Up/Step-Down Soft-Switching Bidirectional DC–DC Converter With Coupled-Inductor and Voltage Matching Control for Energy Storage Systems”, IEEE Trans. Ind. Electron., vol. 63, no. 5, pp. 2892-2903, 2016.

[4] O. D. Patterson, D. M. Divan, “Pseudo-resonant full bridge DC/DC converter”, in Proc. IEEE PESC, pp. 424-430, 1987.

[5] K. H. Liu, F. C. Lee, “Zero-voltage switching technique in DC/DC converters”, in Proc. IEEE PESC, pp. 58-70, 1986.

[6] D. M. Divan, G. Skibinski, “Zero-switching-loss inverters for high-power applications”, IEEE Trans. Ind. Electron., vol. 25, no. 4, pp. 634-643, 1989.