华南理工大学学报(自然科学版) ›› 2020, Vol. 48 ›› Issue (10): 1-10.doi: 10.12141/j.issn.1000-565X.190866

• 能源、动力与电气工程 •    下一篇

基于 GaN 器件的双向 CLLC 谐振变换器分析与设计

杜贵平 郑燕宾 刘源俊 王雪毅   

  1. 华南理工大学 电力学院,广东 广州 510640
  • 收稿日期:2019-11-28 修回日期:2020-05-12 出版日期:2020-10-25 发布日期:2020-09-14
  • 通信作者: 杜贵平(1968-),男,博士,研究员,主要从事大功率电能变换技术研究。 E-mail:gpdu@scut.edu.cn
  • 作者简介:杜贵平(1968-),男,博士,研究员,主要从事大功率电能变换技术研究。
  • 基金资助:
    广东省应用型科技研发专项资金资助项目 (2015B020238012); 广东省自然科学基金团队项目 (2017B030312001)

Analysis and Design of Bidirectional CLLC Resonant Converter Based on GaN Devices

DU Guiping ZHENG Yanbin LIU Yuanjun WANG Xueyi   

  1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2019-11-28 Revised:2020-05-12 Online:2020-10-25 Published:2020-09-14
  • Contact: 杜贵平(1968-),男,博士,研究员,主要从事大功率电能变换技术研究。 E-mail:gpdu@scut.edu.cn
  • About author:杜贵平(1968-),男,博士,研究员,主要从事大功率电能变换技术研究。
  • Supported by:
    Supported by the Applied Science and Technology Research Special Fund of Guangdong Province (2015B020238012) and the Natural Science Foundation Team Project of Guangdong Province (2017B030312001)

摘要: GaN 器件具有开关速度快、导通电阻低、寄生参数小和反向恢复损耗低等优良特性,相比其他器件更有利于实现双向 CLLC 谐振变换器的高频率和高效率。文中基于GaN 器件的特点,利用戴维南等效定理对双向 CLLC 谐振变换器的谐振频率进行了分析求解,并根据开关管寄生电容的充放电特性来改善软开关的实现条件,最终研制了一种基于 GaN 器件的双向 CLLC 谐振变换器。文中还搭建了额定功率为 400 W 的双向 CLLC谐振变换器实验样机,实现了全负载范围内逆变侧的零电压开通和特定负载范围内整流侧的零电流关断,在正向模式下的最高效率可达 97. 02%,反向模式下的最高效率可达95. 96%,最大工作频率达 548kHz,具有高频率和高效率的特点,从而验证了所分析与设计的变换器的正确性和有效性。

关键词: 氮化镓, 双向 CLLC 谐振变换器, 软开关

Abstract: GaN device has the advantages of fast switching speed,low on-off resistance,small parasitic parameters and low reverse recovery loss. As compared with other devices,it is more conducive to realizing the high frequency and high efficiency of bidirectional CLLC resonant converter. In this study,based on the characteristics of GaN de-vices,the resonance frequency of the bidirectional CLLC resonant converter was analyzed and calculated by using Thevenin equivalent theorem,and the condition to realize the soft switch was improved according to the charging and discharging characteristics of parasitic capacitance of switch tube. Finally,a bidirectional CLLC resonant con-verter based on GaN device was developed. An experimental prototype of bidirectional CLLC resonant converter with a rated power of 400W was built to achieve zero-voltage turn-on (ZVS) on the inverter side in all load range and zero-current turn-off (ZCS) on the rectifier side in a specific load range. Its maximum efficiency can reach to 97. 02% in the forward mode and 95. 96% in the reverse mode,and its maximum operating frequency is 548kHz.With features of high frequency and high efficiency,it verifies the correctness and effectiveness of the analyzed and designed converter.

Key words: GaN, bidirectional CLLC resonant converter, soft switching

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