基于双脉宽调制的交错Boost集成型CLLLC谐振变换器宽增益控制策略  

Wide-Gain-Range Control Scheme for Interleaved Boost Integrated CLLLC Resonant Converter Based on Dual Pulse Width Modulation

作　　者：李小强[1] 马永超 黄金伟 王心潭 伍小杰[1] Li Xiaoqiang;Ma Yongchao;Huang Jinwei;Wang Xintan;Wu Xiaojie(School of Electrical Engineering China University of Mining and Technology,Xuzhou 221116 China)

机构地区：[1]中国矿业大学电气工程学院,徐州221116

出　　处：《电工技术学报》2022年第20期5313-5323,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金青年科学基金(51807196);中国博士后科学基金(2019M661983)资助项目。

摘　　要：交错Boost集成型CLLLC谐振变换器具有高增益、高效率等优点,在使用脉宽调制时理论上可得到较宽的电压增益范围,但其在现有的定频同步PWM下会随着占空比逐渐偏离0.5而出现越来越大的电流尖峰,导致占空比调节范围受限,其电压增益范围相比于传统的谐振变换器无明显优势。为实现宽增益,该文采用双脉宽调制的方法克服了定频同步PWM的缺点,提出定频同步双脉宽调制与变频双脉宽调制两种调制方式,并通过分析,构建两种调制方式的切换点,最终形成一种宽增益控制策略。该文分析了所提出宽增益控制策略的工作原理及运行特性,并通过实验验证了该控制策略的可行性与理论分析的正确性。The interleaved Boost integrated CLLLC resonant converter has the advantages of high gain and high efficiency.A wide voltage gain range can be theoretically obtained when using PWM.However,under the existing fixed-frequency synchronous PWM modulation,an increasingly large current peak appears as the duty cycle gradually deviates from 0.5,which limits the duty cycle adjustment range.Moreover,its voltage gain range has no obvious advantages compared with the traditional resonant converter.In order to achieve wide gain,this paper adopts the method of dual pulse width modulation to overcome the shortcomings of fixed-frequency synchronous PWM,and proposes two modulation methods of fixed-frequency synchronous dual pulse width modulation and variable-frequency dual pulse width modulation.The switching points of the two modulation methods are constructed,and a wide gain control strategy is formed.The working principle and operation characteristics of the proposed wide gain control strategy are analyzed.Finally,the feasibility of the proposed control strategy and the correctness of theoretical analysis are verified by experiments.

关 键 词：交错Boost集成型CLLLC谐振变换器 定频同步双脉宽调制 变频双脉宽调制 宽电压增益 

分 类 号：TM46[电气工程—电器]