摘要
研究了一种在谐振腔并联电感的双向LLC谐振变换器,采用变频与副边移相的混合控制策略,在降压模式时采用变频控制,在升压模式时采用副边移相控制,实现变换器的宽电压增益范围与全负载范围内ZVS,提高变换器的效率。分析了变换器在混合控制策略下的工作原理与软开关特性,最后通过实验验证了变频与副边移相控制的有效性。
A bidirectional LLC resonant converter with a parallel inductor in the resonant cavity is studied.It adopts a hybrid control strategy of frequency conversion and secondary side phase shifting.Frequency conversion control is used in the step-down mode,and secondary-side phase shift control is used in the boost mode.The wide range gain of the converter and the ZVS in the full load range are realized,and the efficiency of the converter is improved.The working principle and soft switching characteristics of the converter under the hybrid control strategy are analyzed in detail.Finally,the effectiveness of the frequency conversion and secondary phase shift control is verified through experiments.
作者
李小双
田钦元
王正仕
LI Xiaoshuang;TIAN Qinyuan;WANG Zhengshi(College of Electrical Engineering,ZheJiang University,Hangzhou 310027,China)
出处
《电工技术》
2021年第21期83-86,96,共5页
Electric Engineering
关键词
LLC谐振变换器
变频
副边移相
LLC resonant converter
variable frequency
secondary-side phase shift
