基于LCC谐振变换器的脉冲等离子体推力器优化充电技术  

Optimized Charging Technology of Pulsed Plasma Thruster Based on LCC Resonant Converter

作　　者：王德玉[1] 李杰 于建萍 赵清林[1] WANG Deyu;LI Jie;YU Jianping;ZHAO Qinglin(Laboratory of Power Electronics Energy Conservation and Transmission Control,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《高电压技术》2021年第1期360-367,共8页High Voltage Engineering

基　　金：国家自然科学基金(51407154);河北省自然科学基金(E2016203237)。

摘　　要：针对脉冲等离子体推力器(pulsed plasma thruster,PPT)高压储能电容充电技术,研究了LCC谐振变换器的输出特性。为了满足充电电源需要足够大恒流输出能力的需求,分析了LCC谐振变换器在电流断续模式下的工作原理,并着重解析了双脉冲输出的工作模式,将电流输出能力最大化。为了优化充电电源的效率,研究了变换器的软开关实现条件,特别是在谐振槽能量回馈阶段采用同步整流技术,显著降低了功率管损耗。为了使充电电源具有较高的电压精度,在恒压工作阶段采用了软开关滞环Burst控制策略。最后,搭建了一台输入电压28 V、输出电压2 kV、最大输出功率400 W的实验样机,通过实验证明了所提方案的有效性和可行性。The output characteristics of an LCC resonant converter are studied for the pulsed plasma thruster(PPT) high-voltage storage capacitor charging technology. In order to meet the demands of the charging power supply with sufficient constant current output capability, the working principle of the LCC resonant converter in DiscontinuousCurrent-Mode(DCM) is analyzed, the working mode of the double-pulse output is emphatically analyzed, and the current output capability is maximized. In order to optimize the efficiency of the charging power supply, the soft switching implementation conditions of the converter are studied, especially the synchronous rectification technology is used in the energy feedback phase of the resonant tank to significantly reduce the power tube loss. In order to make the charging power supply have higher voltage accuracy, the soft switching hysteresis Burst technique is adopted in the constant voltage working phase. Finally, an experimental prototype with input voltage of 28 V, output voltage of 2 kV and maximum output power of 400 W is built. The effectiveness and feasibility of the proposed scheme are proved by experiments.

关 键 词：脉冲等离子体推力器 LCC谐振变换器 恒流输出 同步整流 电压精度 

分 类 号：TM46[电气工程—电器]