一种用于投影光源的高性能电子镇流器

High Performance Electronic Ballast for Projection Lighting Source

提出了一种用于投影光源的高性能电子镇流器.主电路采用无源无损的缓冲电路,减小了由于续流二极管反向恢复所引起的开通损耗,提高了镇流器的效率.以数字控制器为核心,结合模拟方式的PWM控制,实现了恒功率控制.分析了镇流器的工作原理并给出了实验结果,实验结果表明该镇流器具有电路简单、可靠性高的优点,实验样机的效率达到了94%.

This paper presents a high performance electronic ballast for projection lighting source. The main circuit of the electronic ballast adopts passive lossless snubber. The snubber is to suppress the turn-on loss resulting from the recovery current of the freewheeling diode, and the efficiency of the electronic ballast can be improved. The control circuit based on MCU combing with high frequency analogue PWM chip can realize constant power control. This paper analyzes the operation principle of the electronic ballast in detail, and experimental results verify that the proposed solution has good performance.