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| A Multi Resonant Bidirectional DC-DC Converter |
| Wang Ping1, Chen Bo1, Wang Yifeng1, Zhang Shuhuai2, Yang Liang3 |
1. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China;
2. Beijing Dynamic Power Co. Ltd Beijing 100070 China;
3. National Electric Power Dispatching and Control Center State Grid Corporation of China Beijing 100031 China |
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Abstract A novel high conversion ratio bidirectional CDT-LC resonant DC-DC converter is proposed in this paper. The new converter not only maintains the good characteristic of LLC for zero voltage switching (ZVS) on the high voltage side (HVS) and zero current switching (ZCS) on the low voltage side, but also harvests a good gain feature. The converter has broadened voltage gain range with high efficiency. Besides, the operating principles and feature analysis of the converter are given for both step-up and step-down modes. Also, a loss breakdown for the proposed converter and a comparison between SiC and Si devices are given. At last, a 2.5kW prototype is established to verify the performance of the CDT-LC converter. The highest efficiency reaches 97%.
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Received: 27 June 2018
Published: 05 May 2019
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2019, Vol. 34 
