新型无汞平面光源用零电压逆变电源的研究  

Study of ZVS Two-switch Flyback Inverter for Mercury-free Flat Fluorescent Lamp

作　　者：刘震[1] 

机构地区：[1]西安交通大学,电子物理与器件教育部重点实验室,陕西西安710049

出　　处：《电力电子技术》2013年第9期4-5,18,共3页Power Electronics

基　　金：国家自然科学基金项目(61205022)~~

摘　　要：为提高电路的转换效率,降低对功率开关器件的耐压要求,提出了一种新型的零电压双管反激逆变器。通过引入一级辅助开关来控制输入电压的通断,从而降低了主开关器件在关断期间所承受的电压应力,解决了反激逆变器在高输入电压情况下开关管承受电压应力过高的问题。分析并验证了该拓扑的工作原理,制作了基于12寸无汞平面光源(FFL)逆变电源的原型。实验结果表明,在高输入电压下,双管反激逆变器主开关管所承受的电压应力较传统的反激逆变器低。采用该结构驱动的无汞FFL在输入功率为62.5 W时,可获得8000 cd/m^2的亮度以及19.51m/W的系统发光效率。A novel zero-voltage switching（ZVS） two-switch flyback inverter is presented to reduce the voltage stress on MOSFET and improve the converter efficiency.The voltage .stress on MOSFET is reduced by adopting an auxiliary switch to block the high input DC voltage during the turn-off time of switching period.The prototype is built with a newly developed 12 inch mercury-free flat fluorescent lamp（FFL） and the inverter concepts are demonstrated.The experimental results show that the voltage stress on MOSFET is reduced with the increasing of input voltage compared with the traditional flyback inverter.A maximum luminance about 8 000 cd/m2 and system efficiency about 19.5 lm/W can be achieved with the proposed inverter.

关 键 词：反激逆变器 平面光源 双管 电压应力 

分 类 号：TM464[电气工程—电器]