一种降低气体辉光放电驱动用恒流源功耗电路  

Low Power Consumption Circuit of Constant Current Source for Driving Gas Glow Discharge

作　　者：王永清[1] 刘欢 万真真[1] 沈懿璇 Wang Yongqing;Liu Huan;Wan Zhenzhen;Shen Yixuan(College of Electronic Information Engineering,Hebei University,Baoding,Hebei 071002,China)

机构地区：[1]河北大学电子信息工程学院,河北保定071002

出　　处：《激光与光电子学进展》2021年第19期350-354,共5页Laser & Optoelectronics Progress

基　　金：河北省专业学位研究生教学案例库项目(KCJSZ2018010);钢铁研究总院与河北大学合作课题。

摘　　要：为了便于气体放电等离子体的起燃,驱动恒流源需要较高的开路电压,同时因气体放电具有负阻效应,起燃后维持放电所需的电压远小于起燃电压,起燃后富余的电压会造成恒流源具有较大功耗。鉴于此,提出一种降低气体辉光放电驱动用恒流源功耗电路方案,给出电路原理图并详细分析其工作原理。本方案使用开路电压略高于气体放电维持电压的恒流源来降低功耗,使用高压脉冲压电陶瓷来保证气体放电可靠起燃,恒流源与高压脉冲电路由高压硅堆隔离后并联工作。实验结果表明,当电路工作正常时,可降低约为50%的功耗。在直流辉光放电实验平台上对镀锌板进行样品精密度的实验测试,发现Cu、Si和Mo等元素含量(谱线强度)的相对标准偏差(RSD)均优于2%。In order to facilitate the ignition of the gas discharge plasma,a high open circuit voltage is required to drive the constant current source.At the same time,because of the negative resistance effect of gas discharge,the voltage required to maintain the discharge after ignition is far less than the ignition voltage,and the surplus voltage after ignition will result in a large power consumption of the constant-current source.In view of this,a circuit scheme to reduce power consumption of a constant current source for glow-discharge drive is proposed,and its working principle is analyzed in detail.In this scheme,a constant current source with an open circuit voltage slightly higher than the maintenance voltage of gas discharge is used to reduce power consumption,and a high-voltage pulse piezoelectric ceramic is used to ensure reliable ignition of gas discharge.The constant current source and the highvoltage pulse circuit work in parallel after being isolated by high-voltage silicon stack.Experimental results show that when the circuit works normally,the power consumption can be reduced by about 50%.The sample precision test of the galvanized sheet is carried out on the direct current glow discharge experimental platform,and it is found that the relative standard deviation(RSD)of the test results of Cu,Si,and Mo contents(spectral line intensity)are all greater than 2%.

关 键 词：表面光学 高压脉冲压电陶瓷 开路电压 功耗 负阻效应 高压硅堆 

分 类 号：TH744[机械工程—光学工程]