城市轨道交通照明无极灯启动过程研究

Study of Starting Process of Electrodeless Lamp for Urban Rail Transit Lighting

为了提高城市轨道交通照明用无极灯的节能效果,本文采用高速摄像机和数字示波器记录了无极灯发光照片、电压电流波形和光信号强度,并对发光图像、电压电流和光强度的变化进行了分析。结果表明,无极灯的启动过程时间短;启动过程中发生了放电模式E-H的转变,转变时间仅十几微秒;发光亮度和区域随时间增加逐渐增加到稳定的阶段;随工作电压的增加,放电电压峰值先增后减,放电电流增加至稳定,光信号强度先增后减。

In order to improve light efficiency of high frequency electrodeless lamps for urban rail transmit lighting, luminous photographs, voltage and current waveforms, and light intensity are taken with a high- speed camera and a digital oscilloscope. The changes of luminous photographs, voltage and current waveforms, and light intensity are analyzed in the paper. The results show that the starting time of electrodeless lamp is short; discharge mode transition occurs in the initial staring stage and its time is only ten microseconds; light brightness and area increase to stable stage with discharge time; with working voltage increasing, discharge peak voltage increases first then decrease, discharge current increase to stability, and light intensity signal increases first then decrease.