摘要
针对LCC-S型拓扑网络的实际负载值偏离最优负载的问题,利用后级级联Sepic变换器实现了宽范围阻抗匹配,并由前级直流输入电源控制输出稳压。首先,利用互感模型分析了LCC-S型拓扑谐振状态下的网络特性,得到传输特性及最优负载值;其次,对后级Sepic变换器在开关管导通和断开时的工作模式进行分析,阐释了Sepic电路实现宽范围阻抗匹配的原理,并推导了占空比D表达式;最后,利用MATLAB仿真验证了LCC-S型拓扑的恒压特性以及宽范围阻抗匹配理论和控制方案的可行性。
Aiming at the problem that the actual load value of LCC-S topology network deviates from the optimal load,a wide range impedance matching is realized by using the cascaded Sepic converter,and the output voltage is controlled by the front DC input power supply.Firstly,the mutual inductance model is used to analyze the network characteristics under LCC-S topology resonant state,and the transmission characteristics and the optimal load value are obtained.Secondly,the working mode of the later stage Sepic converter when the switch is on and off is analyzed,the principle of Sepic circuit to realize wide range impedance matching is explained,and the expression of duty cycle D is deduced.Finally,the constant voltage characteristics of LCC-S topology and the feasibility of wide range impedance matching theory and control scheme are verified by MATLAB simulation.
作者
仇雪颖
乔康恒
孙盼
孙军
张筱琛
QIU Xue-ying;QIAO Kang-heng;SUN Pan;SUN Jun;ZHANG Xiao-chen(College of Electrical Engineering,Naval University of Engineering,Wuhan,Hubei 430000,China)
出处
《计算技术与自动化》
2022年第2期7-13,共7页
Computing Technology and Automation
基金
国家自然科学基金资助项目(52007195)
湖北省自然科学基金资助项目(2018CFA008,2019CFB608)。
