CLLLC谐振型直流变换器参数设计研究  

Research on Parameter Design of CLLLC Resonant DC Converter

作　　者：许景慧 王跃[1] 李凯 XU Jinghui;WANG Yue;LI Kai(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China)

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电气传动》2021年第14期13-17,22,共6页Electric Drive

摘　　要：CLLLC谐振式直流变换器因具有功率双向传输、电压等级转换效率高、正反向运行特性高度一致等很多优点,被应用在电动汽车直流充电桩。但是由于谐振元件个数较多且过程分析复杂,关于谐振回路参数的选择目前的研究缺少一种明确详细的设计方法。基于基波等效法先建模分析了各参数对变换器运行特性的影响以及软开关实现条件,然后提出了步骤详细、原理简单的参数设计两种方法。通过PSIM对其仿真对比第二个方法效率更优。基于效率最优的第二套参数搭建一台150 W、输入80 V、输出20~75 V的实验样机,并验证所提参数设计方法能自然实现软开关及宽范围输出。CLLLC resonant DC converter has many advantages,such as bidirectional power transmission,high voltage level conversion efficiency,high consistency of forward and reverse operation characteristics,and is widely used in DC charging piles of electric vehicles.However,due to the large number of resonant elements and the complexity of process analysis,the current research on the selection of resonant circuit parameters lacks a clear and detailed design method.Based on the fundamental wave equivalent method,the influence of each parameter on the operation characteristics of the converter and the conditions of soft-switching implementation were modeled and analyzed firstly,then two methods of parameter design with detailed steps and simple principles were proposed.The waveform of PSIM simulation shows that the second method is more efficient.Based on the second set of parameters with the best efficiency,an experimental prototype with 150 W,80 V input and 20~75 V output was built.The prototype verifies that the proposed parameter design method can naturally realize soft switching and wide range output.

关 键 词：CLLLC谐振型直流变换器 基波等效法 软开关 参数设计 

分 类 号：TM402[电气工程—电器]