摘要
针对现行主流的基波分析法在电压增益计算时准确度较差,以及传统的谐振参数设计方法在对电池这类非阻性电源负载时存在参数难以确定的问题,提出基于时域近似法的CLLC谐振参数计算,解决了电压增益精确度和参数选取困难的问题。首先建立变换器的P、N、O等3种模态的时域方程,通过对运行时主要工作模式中PO、PN波形的简化,求出对应模式的电压增益公式,以电压增益范围和全局软开关的实现作为参数选取的约束条件,求出具体的谐振网络参数;然后利用MATLAB搭建仿真实验模型,实现全局软开关和电压增益要求,在谐振频率下工作效率均在95%以上。仿真实验结果验证了所提设计方法的可行性。
Resonant network parameters are the key factors for the stable operation of CLLC resonant converter.The CLLC resonant parameter calculation based on the time domain approximation method is proposed in this paper in view of the poor accuracy of the fundamental wave analysis method in voltage gain calculation and the difficult parameter selection of the traditional resonant parameter design method for non-resistive active loads such as batteries.Firstly,the time domain equations of P,N and O modes of the converter are established,and the voltage gain equations of the corresponding modes are derived by simplifying the waveforms of the main operating modes,and the specific resonant network parameters are derived by using the voltage gain range and the implementation of global soft switching as the constraints for parameter selection.Then,the simulation experimental model is built on MATLAB,and the global soft switching and voltage gain requirements are realized,and the working efficiency is above 95%at resonant frequency.The simulation experimental results verify the feasibility of the proposed design method.
作者
王国盛
刘胜永
罗慧友
WANG Guosheng;LIU Shengyong;LUO Huiyou(School of Automation,Guangxi University of Science and Technology,Liuzhou 545616,China;Key Laboratory of Guangxi Automobile Component and Vehicle Technology(Guangxi University of Science and Technology),Liuzhou 545616,China)
出处
《广西科技大学学报》
CAS
2024年第1期62-69,共8页
Journal of Guangxi University of Science and Technology
基金
广西汽车零部件与整车技术重点实验室自主研究课题(2020GKLACVTZZ04)
广西自然科学基金重点项目(2020GXNSFDA238011)
广西自动检测技术与仪器重点实验室基金项目(YQ22203)资助。
关键词
CLLC谐振变换器
谐振网络参数
时域近似法
全局软开关
CLLC resonant converter
resonant network parameter
time domain approximation method
global soft switching
