定频移相控制六开关双谐振变换器研究  

Research on Six-switch Dual-resonant Converter with Fixed-frequency Phase-shift Control

作　　者：潘健[1] 宋豪杰 刘松林 熊嘉鑫 石迪 PAN Jian;Member;CPSS;SONG Haojie;LIU Songlin;XIONG Jiaxin;SHI Di(School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学电气与电子工程学院,武汉430068

出　　处：《电源学报》2024年第2期55-63,共9页Journal of Power Supply

基　　金：太阳能发电及储能运行控制湖北省重点实验室开放基金资助项目(HBSEES201902)。

摘　　要：针对传统频率控制的LLC谐振变换器在宽电压应用中电压调节性能差且循环电流较大的问题,设计一种六开关双谐振LLC变换器。该变换器由2个全桥LLC谐振变换器共用1个桥臂混合组成。相较于传统的频率控制,该变换器采用定频移相控制调节输出电压,减小开关频率范围。根据2个变压器连接方式的不同,变换器有2种拓扑形态。当2个变压器顺极性串联时,变换器的增益范围为0~1,可以实现超宽输出电压;当2个变压器反极性串联时,变换器的增益范围为1~2,在工作过程中具有较小的环流损耗。2种拓扑形态下,原边开关管和副边二极管分别实现ZVS开通和ZCS关断。最后,通过Simulink仿真和实验验证了研究内容的有效性。Aimed at the poor voltage regulation performance and large circulating current of the traditional frequency-controlled LLC resonant converter in wide voltage applications,a six-switch dual-resonant LLC converter is designed,which is a hybrid combination of two full-bridge LLC resonant converters sharing one bridge arm.Compared with the traditional frequency control,fixed-frequency phase-shift control is employed in this converter to adjust the output voltage and reduce the switching frequency range.According to different connection modes of two transformers,the converter has two topological forms.When the two transformers are connected in series in the forward polarity,the converter’s gain range is 0-1,which can achieve an ultra-wide output voltage range.When the two transformers are connected in series in the reverse polarity,the gain range is 1-2,and the circulating current loss during the working process is small.Under the two topological forms,the ZVS turn-ON of the primary switch tube and ZCS turn-OFF of the secondary diodes can be achieved,respectively.Finally,the validity of the research in this paper was verified by Simulink simulations and experimental results.

关 键 词：定频移相控制 谐振变换器 宽输出电压 软开关 

分 类 号：TM46[电气工程—电器]