單開關零電壓切換共振式轉換器

Zero-Voltage-Switching Resonant Converter with Single-Switch Topology

潘建良(Jian-Liang Pan)

指導教授 ： 莊英俊

共同指導教授 ： 張永昌(Yeong-Chan Chang)

崑山科技大學/工程學院/電機工程研究所/碩士(2012年)

摘要

為了實現高效能、低損失、高效率及低成本之電力轉換器，本論文採用兩種具有柔性切換特性的共振式直流轉換器電路，應用於電阻性負載，分別為(1)單開關零電壓切換共振式轉換器Ⅰ型；(2)單開關零電壓切換共振式轉換器Ⅱ型。以E類共振式轉換器作為電路架構，並兼具體積小、重量輕、電路結構簡單、高輸出效率、以及低成本等多項優點。
E類共振式轉換器為現今轉換器中效率最高的，且電路架構更加簡單，別於在傳統D類共振式轉換器，不僅效率更高，而且只需要一組功率開關和一組驅動訊號電路，這不僅節省成本而且效率也可以使用簡單的電路架構達成，而在共振式轉換器中只要將共振槽內，使用不同元件組合排列，則會出現不同的共振效果，而本論文採用了兩種不同共振式電路，分別為串聯以及串並聯方式，並使用柔性切換的零電壓切換(Zero Voltage Switching；ZVS)方式以來解決切換時所造成的損失，此方式可以輕易的提高轉換器之效率，並且充分達到不浪費能源的效果。
本論文將開關導通情形，加以分析電路作工原理及操作模式，建立等效電路，設計共振時最佳元件參數，並使用電腦模擬與實際電路作理論驗證。最後，由結果單開關零電壓切換共振式轉換器Ⅰ型與單開關零電壓切換共振式轉換器Ⅱ型的實驗結果得知，兩種共振式直流轉換器電路效率均高達96%以上。

關鍵字

柔性切換 ； 零電壓切換 ； E類共振式轉換器

並列摘要

In order to achieve the goal of a high performance, low switching loss, high efficiency, and low cost electric converter. In this thesis, using two different soft-switching DC resonant converters are applied to resist rectification. There are divided into two parts. First is type single-switch zero voltage switching resonant converter. Second is type single-switch zero voltage switching resonant converter. By using class E resonant converter to be circuit structure gains more advantages such us, smaller volume, lighter weight, simple circuit structure, high output efficiency, as well as lower cost.
The class E resonant converter is the most efficient one and the circuit structure is simple than before. It is different from the traditional class D resonant converter, even higher efficiency is, and also only need a set of power switch and a set of driving signal circuit. It can not only reduce the cost, but also can use the simple circuit structure to reach the efficiency. While in the resonant converter, using the different elements of arranging combination in the resonant circuit will gain different results of resonance. This thesis adopting two different kinds of resonant circuits, one is series, and the other is series-parallel, and also using soft-switching of zero voltage switching (ZVS) to solve the losses caused by switching. This method can easily improve the efficiency of the converter, and also avoid unnecessary waste of energy. By this situation of switching conduction, to analyze of the principles of circuit workmanship and the mode of operation, to build the same effects of circuit, to devise the resonant in best component parameter, and also use computer simulation and practical circuit to verify the theory. In conclusion, the researching result of typeⅠuni-switch zero voltage switching resonant converter and typeⅡuni-switch zero voltage switching resonant converter, both two kinds of DC resonant converter circuit of efficiency can reach higher than ninety-six percentage.

並列關鍵字

Soft-Switching ； Zero Voltage Switching ； Class E Resonant Converter

參考文獻

[1] S. H Park, “Analysis and Design of a Soft-Switching Boost Converter With an HI-Bridge Auxiliary Resonant Circuit,” IEEE Transactions on Power Electronics, Vol. 25, Aug. 2010, pp. 2142-2149.

[2] C. M Wang, “A Novel Soft-Switching Single-Phase AC–DC–AC Converter Using New ZVS–PWM Strategy,” IEEE Transactions on Power Electronics, Vol. 22, Sep. 2007, pp.1941-1948.

[3] M. R Yazdani, “EMI Analysis and Evaluation of an Improved ZCT Flyback Converter,” IEEE Transactions on Power Electronics, Vol. 26, Aug. 2011, pp.2326-2334.

[4] E. Yuce, “Negative Impedance Converter With Reduced Nonideal Gain and Parasitic Impedance Effects,” IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 55, Feb. 2008, pp.276-283.

[5] K. Fukushima, “Analysis of Abnormal Oscillation Phenomenon in DC-DC Converter with Active-Clamp Snubber and Self-driven Synchronous Rectifier,” 10th IEEE nternational Power Electronics Congress, 16-18 Oct. 2006, pp.1-6.