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Research on a MHz RDCX Converter with High Efficiency High Power Density Based on Half Bridge Resonant Topology
投稿时间:2020-04-18  修订日期:2020-05-08
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Keywords:Resonant converter, MHz frequency, Output Regulation, RDCX
Fund Project:The National Key Research and Development Program of China (2017YFB0402804)
     
AuthorInstitutionEmail
Zhangle Southwest China Institute of Electronic Technology 1107796268@qq.com
Wuxinke Zhejiang University wuxinke@zju.edu.cn
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Abstract:
      The resonant converter can operate in MHz frequency due to the soft switching characteristics, which can meet the requirement of efficiency and power density of high-density power module. The soft-switching range of resonant topology is limited when frequency modulation methods is adopted to adjust the output in MHz condition. When the resonant converter operates as a DC transformer (DCX), it has the advantages of high efficiency and high power density. However, the output voltage cannot be regulated. As a result, the regulated DCX (RDCX) is achieved by a controllable voltage source cascading in DCX in this paper. Most of the input power is directly processed by DCX, and only a small part of the input power is processed by two-stage to achieve output voltage regulation, and as a result, high efficiency and high power density of RDCX are ensured. A RDCX prototype with an input voltage of 360V-400V, output voltage of 12V and full load power of 750W is built in this paper, and the RDCX scheme is verified by experimental results.
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