高效宽电压增益CLLC谐振变换器分段控制研究  

Study of piecewise-control of high efficiency and wide voltage gain CLLC resonant converter

作　　者：文伟仲 舒杰[1,3] 王浩 陈亚宾[4] 黄玮 WEN Weizhong;SHU Jie;WANG Hao;CHEN Yabin;HUANG Wei(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou Guangdong 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou Guangdong 510640,China;CCG NEW Energy Holding Co.,Ltd.,Hong Kong 999077,China;China Nuclear Power Design Co.,Ltd.(Shenzhen),Shenzhen Guangdong 518100,China)

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院大学,北京100049 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广东广州510640 [4]中国广核新能源控股有限公司,香港999077 [5]深圳中广核工程设计有限公司,广东深圳518100

出　　处：《电源技术》2021年第11期1500-1504,共5页Chinese Journal of Power Sources

基　　金：国家重点研发计划资助项目(2017YFB0903401);广东省海洋经济发展专项资金项目(GDNRC[2020]020);广东省新能源和可再生能源研究开发与应用重点实验室基金项目(y909jk1001)。

摘　　要：提出了一种新的CLLC变换器的分段控制,解决了传统脉冲宽度调制(pulse width modulation,PWM)和脉冲频率调制(pulse frequency modulation,PFM)存在的软开关范围窄和开关频率变化范围宽等问题。该控制策略基于LLC变换器上的分段控制,在实现软开关前提下,将其三段控制优化为两段,在高、低电压增益时分别采用PFM、对称PWM控制,可实现较大开关增益范围的窄开关频率变化范围,以及全工作区间内的原边开关器件零电压开关(ZVS);分析了针对该控制策略的参数设计、以及基于相关参数的分段区间确定方法;最后,利用MATLAB仿真验证了该方法的可行性与优越性。A new piecewise-controlled bidirectional CLLC converter is proposed to solve the problems of narrow soft switching range and wide switching frequency variation existing in traditional pulse width modulation(PWM)and pulse frequency modulation(PFM).The control strategy is based on the piecewise-control strategy on the LLC converter,in which three control sections are optimized to two sections.The boundary condition is determined by the soft switching conditions.PFM control is used to achieve higher voltage gain,and symmetrical PWM control is used to achieve lower voltage gain.The switching frequency range is smaller when the switching gain range is larger,and Zero Voltage Switching(ZVS)of the original side switch can be realized in the whole operating range.The parameter design method for the control strategy and the segmentation interval determination method based on the relevant parameters are analyzed.Finally,MATLAB simulation is used to verify the research result.

关 键 词：CLLC谐振变换器 分段控制 PWM控制 PFM控制 ZVS 

分 类 号：TM46[电气工程—电器]