Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (8): 18-25.doi: 10.3969/j.issn.1000-565X.2016.08.004

• Power & Electrical Engineering • Previous Articles     Next Articles

A Set of High-Frequency Resonant Converters with Switch-Controlled Capacitor

ZENG Jun1 SUN Wei-hua1 LIU Jun-feng2   

  1. 1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.School of Automation Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-02-21 Revised:2016-04-08 Online:2016-08-25 Published:2016-07-04
  • Contact: 刘俊峰( 1978-) ，男，副教授，主要从事电力电子的控制应用、非线性控制、高频配电系统等的研究． E-mail:aujfliu@scut.edu.cn
  • About author:曾君( 1979-) ，女，副教授，主要从事电力电子、分布式发电的能量管理和智能控制等的研究． E-mail: junzeng@scut． edu． cn
  • Supported by:
    Supported by the National Natural Science Foundation of China( 61573155)

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Abstract: At present,the most effective control of resonant converters is the frequency modulation,but the wide variation range of working frequencies can reduce the performance of magnetic components and increase the design complexity.In this paper,a set of resonant converters based on controllable switched capacitors ( SCC) is proposed,which can effectively control the output of resonant converters at a constant frequency by adjusting the equivalent capacitance of resonant tanks.The superiority of the proposed SCC structure is demonstrated by analyzing and comparing different SCC topologies.Then,second-order and third-order resonant converters are combined with the proposed SCC structure,and the characteristic of a new SCC-LCL-T resonant converter topology based on the half-bridge phase-shift control is discussed in detail.Finally,the feasibility and effectiveness of the proposed SCC structure are verified by simulation and experiments.

Key words: resonant converter, full-wave SCC, phase shift control, ZVS soft switch, SCC-LCL-T resonant converter