LLC谐振型软开关直流变压器的研究与实现

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Abstract DC-DC converter has two basic types, including the regulated DC-DC converter and the unregulated DC-DC transformer. LLC resonant converter is a kind of practical soft-switching DC-DC converter, with the research focusing on the regulated form named regulated LLC resonant DC-DC converter. In order to increase the practical topology of soft-switching and high-efficiency DC-DC transformer, the unregulated form of LLC resonant DC-DC converter named LLC resonant DC-DC transformer is studied in this paper. The design method is proposed by the gain curve analyze of LLC resonant DC-DC transformer, and the load characteristics of gain and efficiency of the DC-DC transformer is analyzed specializing for optimal design. Finally, a LLC resonant DC-DC transformer protype is designed and bulit up. The experimental results verify the correctness and validity of this design method and the load characteristics analysis.

Key words： LLC resonance converter soft switching DC-DC transformer load characteristics

Received: 09 December 2010 Published: 20 March 2014

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