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| A Novel DC-DC ZVS Full-Bridge Converter Based on Phase-Shift Control |
| Sun Tiecheng,Guo Chao,Naren Tuya,Sun Hang,Shen Hongwei |
| Harbin Institute of Technology Harbin 150001 China |
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Abstract The traditional zero-voltage-switch(ZVS) full-bridge(FB) converter owns two typical defects: one is that the load arrange is narrow for lagging leg to achieve ZVS and the other is that there is obvious voltage overshoot,voltage shock and loss of duty cycle exists on the transformer secondary side. In this paper,a passive auxiliary circuit and a non-dissipative buffer circuit based on phase-shift control are utilized to solve problems mentioned above. Furthermore,the paper also specifically analyzes the principle,operation modes and the necessary condition of soft switching. In order to verify the function of this novel DC-DC ZVS converter,an experimental prototype of 24V/3A,100kHz was built up. Experimental results prove that the converter can achieve ZVS at a wide load range and improve the performance of this novel converter effectively.
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Received: 19 September 2012
Published: 22 January 2015
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2014, Vol. 29 
