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SUN Mingbo,MA Yundong,WEN Haitao.Design of LLC Resonant Converter Used in Ultra-wide Input Applications[J].JOURNAL OF POWER SUPPLY,2019,17(1):1-9
Design of LLC Resonant Converter Used in Ultra-wide Input Applications
Received:December 23, 2016  Revised:March 23, 2018
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DOI:10.13234/j.issn.2095-2805.2019.1.1
Keywords:wide input  LLC  frequency modulation  phase shift
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SUN Mingbo College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China 531870816@qq.com
MA Yundong College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China
WEN Haitao College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing , China
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Abstract:
      According to the characteristics of photovoltaic, wind power, and other new energies, a control strategy for ultra-wide input applications was purposed based on a diode clamp full-bridge three-level LLC resonant converter. This converter can flexibly select the supply power by controlling the switching logic; meanwhile, it used the frequency modulation control and fixed frequency phase shift control to achieve a high gain ratio. The circuit topology, switching logic, and the switching scheme between different modes were analyzed in detail. In addition, the related experiments were conducted under different loads, which effectively verified the general applicability of the designed converter in the harsh environment of ultra-wide input and variable power.
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