常用半桥谐振式逆变电路工作可靠 ,对开关管耐压要求较低而被广泛采用 ,采用这种电路元件少、造价低 ,目前国内市场上见到的高频交流电子镇流器大多采用类似的这种电路。但这种电路存在以下缺点 :无灯丝预热功能 ,易产生灯丝电极溅射 ,降低灯丝的使用寿命 ,使用时间一长易造成 Commonly used half-bridge resonant inverter circuit is reliable, the switch voltage is low and is widely used, the use of such circuit components, low cost, the current domestic market to see the high-frequency AC electronic ballasts are mostly used This kind of circuit is similar. However, this circuit has the following disadvantages: no filament preheating function, easy to produce filament electrode sputtering, reducing the service life of the filament, the use of a long time easily lead to