摘要
基于无极灯负载特性分析,结合锁相环原理,提出1种适用于无极灯电子镇流器的数字锁相控制方案。选取半桥中点电压和灯管管压相位差作为控制变量,实现工作频率自动跟踪谐振频率变化。介绍控制方案的软件控制流程及相应的硬件电路。在无极灯电子镇流器样机上进行实验,实验结果验证了所提方案是可行的。
Based on the analysis of the load characteristics of electrodeless lamps and combined with the principle of phase-locked loop, a scheme of digital phase-locked control applicable to electronic ballasts for electrodeless lamps is presented in this paper. In order to make the working frequency track the resonant frequency automatically while the resonant frequency has changed, the phase difference between the inverter output voltage and lamp voltage is adopted as the control variable. Then, the software control process and the related hardware circuit are introduced. The result of the experiment with a prototype has proved the feasibility of the presented scheme.
出处
《中国照明电器》
2014年第7期15-18,共4页
China Light & Lighting
关键词
无极灯
电子镇流器
数字锁相
频率跟踪
electrodeless lamp
electronic ballast
digital phase-locked
frequency tracking
