摘要
针对便携式氩气辉光放电气体检测应用研究了一种有源箝位型高增益DC/DC击穿电源,并分析了其工作原理及特性。该电源将有源箝位电路、升压变压器和倍压单元整合在一起,不仅实现了初、次级电气隔离,且在较小变压器匝比和较低占空比下实现了超高电压增益(HVG)和低开关应力。该电源通过有源箝位电路回收存储在变压器漏感中的能量,进一步降低了有源开关的电压应力。该箝位电路的引入使两个有源开关均实现了零电压开关(ZVS),有效降低了开关损耗。最后搭建了一台35 W样机,该样机可以实现从24 V到3.5 kV±300 V的超高转换比并实现氩气的击穿,且在约1 kV,35 mA的条件下可维持稳定的氩气辉光放电,稳态下效率可达92.5%。
An active-clamp high step-up DC/DC breakdown source is studied for the portable argon glow discharge atmospheric detection applications,its working principle and characteristics are analyzed.By integrating a step-up transformer with an active-clamp circuit and voltage doubling unit,the primary side and secondary side isolation can be achieved,besides extra-high voltage gain(HVG)and lower switching stress with lesser transformer turn ratio and lower duty ratio are achieved.With the active-clamp circuit,the energy stored in the leakage inductor of the transformer is recycled,which reduces the voltage stress of the active switch.The clamp circuit is adopted to realize zero voltage switching(ZVS)for two active switches,and the turn-on loss is effectively reduced.Finally,a 35 W prototype is built,which can attain the breakdown of argon by extra high transforming ratio from 24 V to 3.5 kV+300 V,and a stable argon glow discharge is sustained with 1 kV,35 mA,with 92.5%efficiency in steady state.
作者
多佳琦
刘雪山
包鹏
贺明智
DUO Jia-qi;LIU Xue-shan;BAO Peng;HE Ming-zhi(Sichuan University,Chengdu 610065,China)
出处
《电力电子技术》
北大核心
2023年第6期53-56,共4页
Power Electronics
基金
国家自然科学基金(52207217)
四川省区域创新合作项目(2021YFQ0006)。
关键词
电源
超高电压增益
低开关应力
零电压开关
source
extra-high voltage gain
lower switching stress
zero voltage switching
