基于LC串联谐振的高压恒流充电电源设计  

Design of high voltage constant current charging power supplybased on LC series resonance

作　　者：江进波 徐林 罗正 杨文 唐铭 姚延东 陈锐 Jiang Jinbo;Xu Lin;Luo Zheng;Yang Wen;Tang Ming;Yao Yandong;Chen Rui(College of Engineering and New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Engineering Research Center for Power Transmission Line,China Three Gorges University,Yichang 443002,China;State Grid Enshi Power Supply Company,Enshi 445000,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]三峡大学湖北省输电线路工程技术研究中心,湖北宜昌443002 [3]国网恩施供电公司,湖北恩施445000

出　　处：《强激光与粒子束》2024年第5期42-49,共8页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51707105);强脉冲辐射环境模拟与效应全国重点实验室基金项目(SKLIPR2008)。

摘　　要：LC串联谐振式高压恒流充电电源能够实现电容器的高效快速充电,且具有较好的抗负载短路能力,在高重频脉冲功率系统中具有广阔的应用前景。充电电源的效率是决定系统重频运行能力的重要因素,提高效率是目前高压电容器充电电源设计的首要目标。根据LC串联谐振电路的工作原理,分析可知电源工作模式、逆变桥的开关频率以及高频变压器的分布参数是影响LC串联谐振电源效率的主要因素。针对功率为10 kW、输出电压为40 kV的直流电源,计算主电路参数并利用Pspice建立了电路模型验证其准确性,采用软开关技术减小开关损耗,设计了分布参数较小的高频变压器进一步提高效率,并在此基础上完成了电源整体结构设计。最后测试了电源的充电特性,结果表明该电源可将0.1μF电容器在37 ms内充电至39.5 kV,其充电效率为87.1%。LC series resonant high voltage constant current charging power supply can realize high efficiency and fast charging of the capacitor and has an excellent capacity of anti-load short-circuit,hence it has extensive application prospects in high repetition frequency pulsed power systems.The efficiency of the charging power supply is a crucial factor to determine the ability of the system to operate at repetition rate.Improving efficiency is the primary goal of designing high-voltage capacitor charging power supply.According to the working principle of LC series resonant circuit,it is analyzed that the operating mode of power supply,the switching frequency of the inverter bridge and the distribution parameters of the high-frequency transformer are the main ingredients affecting the efficiency.For a DC power supply with a power of 10 kW and an output voltage of 40 kV,the main circuit parameters were calculated and the circuit model was established using Pspice to verify its accuracy.The soft switching technology was used to reduce the switching loss,and the high frequency transformer with smaller distribution parameters was designed to further improve the efficiency.On this basis,the overall structure design of the power supply was completed.Finally,the charging characteristics of the power supply were tested.Experimental tests indicate that the power supply can charge a 0.1µF capacitor to 39.5 kV within 37 ms,and the charging efficiency of the power supply is 87.1%.

关 键 词：高压直流电源 LC串联谐振 恒流充电 充电效率 高压电容器充电 

分 类 号：TN78[电子电信—电路与系统]