摘要
LLC谐振变换器以其结构简单、效率高、器件电应力小等优点得到广泛应用。随着电源输出功率的不断提升,为了克服变换器的导通损耗大,输出电流和输入电流的纹波增大以及在全负载范围内不能高效率输出的缺点,提出通道控制技术。以交错并联双向LLC谐振变换器为例,分析了变换器中的各部分损耗,继而用Matlab三维绘图工具绘制出各部分损耗的主次关系,再用数值计算法和仿真法求解对应的换相点电流。最后通过实验验证理论分析的正确性。
LLC resonant converter has been widely used because of its simple structure,high efficiency and low electrical stress.With the continuous improvement of power output,in order to overcome its shortcomings,such as the high on-loss of the converter,increase of the ripple of output current and input current,and uncapable for the converter to output efficiently in the full load range,a channel control technique is proposed.This paper takes the staggered parallel bi-directional LLC resonant converter as an example.The loss of each part of the converter is analyzed,and then the primary and secondary relationships of the loss of each part are drawn by using Matlab3D drawing tool.The corresponding commutation point current is solved by simulation method.Finally,the correctness of the theoretical analysis is verified by experiments.
作者
杨玉岗
薛文彦
黄伟义
许静
YANG Yu-gang;XUE Wen-yan;HUANG Wei-yi;XU Jing(Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China;State Grid, Anhui Tianchang power supply company, Tianchang, 239000, China)
出处
《电工电能新技术》
CSCD
北大核心
2018年第12期32-38,共7页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(U1510128)
辽宁省教育厅重点实验室基础研究项目(LZ2015045)
关键词
LLC
通道控制
换相点
损耗
全负载
高效率
LLC
channel control
commutation point
loss
full load
high efficienc
