电子镇流器是将市电经整流滤波后，再经DC／AC电源变换器(逆变)产生高频电压点亮灯管。其特点是灯管点燃前高频高压，灯管点燃后高频低压(灯管工作电压)。目前最广泛使用的是具有电压馈电半桥式逆变器类型的电子镇流器。现以该类型逆变器为例，介绍电子镇流器的电路组成和工作原理。-Electronic ballast is the grid after rectifying filter, then through a DC/AC power converter (inverter) produce high-frequency voltage light bulb. Characterized by a high frequency high voltage before lamp lighting, lamp lit after high frequency low working voltage (tubes). Currently the most widely used is a voltage feed half bridge inverter type of electronic ballasts. Now with this type inverter as an example, introduces the circuit composition and work principle of electronic ballasts.