无极灯电子镇流器调光控制策略研究  

Research on the Dimming Control Strategy of Electronic Ballast for Electrodeless Lamp

作　　者：洪春辉[1] 沈豫[1] 林国庆[1] 

机构地区：[1]福州大学,电气工程与自动化学院,福建福州350108

出　　处：《电力电子技术》2014年第10期33-36,共4页Power Electronics

摘　　要：基于无极灯电气特性的分析,提出一种适合于无极灯负载特性的调光控制策略。通过分析现有无极灯电子镇流器调光方案以及各自的优缺点,提出了一种将脉冲频率调制(PFM)与脉冲密度调制(PDM)相结合的调光策略。该控制策略既克服了PFM调光范围窄的缺点,使无极灯电子镇流器能稳定可靠工作,又解决了PDM呈有级调光的不足,实现了无极灯电子镇流器平滑的宽范围调光。采用Dspic单片机实现数字化控制,具有控制电路简单,可靠性强等优点。实验结果证明所提方案是可行的。Based on the analysis of the electrical model of electrodeless lamp,a novel dimming control strategy suitable for load characteristics of electrodeless lamp is presented.By analyzing the existing dimming control characteristics of the electrodeless lamp and their respective advantages and disadvantages,a hybrid dimming control strategy by combining pulse frequency modulation （PFM） and pulse density modulation （PDM） is presented.The proposed control strategy makes the electronic ballast work stably and reliably,and overcomes the lack of both PFM and PDM that the dimming range of PFM is not wide and PDM presents a step-dimming,ultimately achieves a smooth,wide-range dimming of the electronic ballast for electrodeless lamp.Due to the use of Dspic microcontroller,the control circuit is simple and the operation of the circuit is reliable,etc.The experimental results have proved the feasibility of the proposed strategy.

关 键 词：镇流器 无极灯 调光控制 

分 类 号：TM923.61[电气工程—电力电子与电力传动]