高可靠性脉冲氙灯电源设计

对540 mm18 mm、极间距250 mm、充气压力26 kPa的脉冲氙灯进行分析计算,研制了一台具有手动和外触发功能、氙灯充电电压2.5～4.5 kV、输出脉冲电流幅度3～6 kA、脉冲宽度约230 s的脉冲氙灯电源,给出了单次触发情况下的实验结果。设计基于晶闸管移相调压方式,经由隔离模块、PLC控制构成的闭环反馈回路,控制调压模块对储能电容器线性充电；通过IGBT半导体开关器件产生脉冲信号,经脉冲变压器升压后触发氙灯,使氙灯导通发光。采用简单、可靠的绕丝触发方式和控制信号隔离、电容器一端接地等方法,有效抑制了地电位抬高,提高了氙灯电源的可靠性和抗干扰能力。通过百次的实验,脉冲氙灯电源能100%点亮负载氙灯,满足实际使用要求。

Design of high reliability pulse xenon lamp power supply

The power supply of the pulse xenon lamp is a key device in high-speed photography test system. Based on the analysis for the parameters of the pulse xenon lamp with a length of 540mm, a diameter of 18mm and a gap of 250mm, a pulsed xenon lamp power supply developed with manual trigger and external trigger functions, xenon lamp charging voltage 2.5～4.5 kV and output pulse current amplitude 3～6 kA with the pulse width of 230 s. Experimental results are given in the case of single trigger. The power supply system adopts the phase shift control of the thyristor to control the voltage regulator module and charges the capacitor linearly. IGBT power semiconductor switching device generates a pulse signal, and the set-up transformer amplifies the signal to trigger the xenon lamp, then the xenon lamp is turned on to emit light. With control signal isolation and capacitor grounded at the end, the method suppresses the effective artificial ground potential, improves the reliability of power supply and anti-electromagnetic interference ability. Hundreds of experiments show the power supply triggers the pulsed xenon lamp with 100% reliability.