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    • 2. 发明申请
    • CIRCUIT AND METHOD FOR PREHEATING FILAMENTS AND BALLAST
    • 用于预热线和电池的电路和方法
    • US20130175945A1
    • 2013-07-11
    • US13811281
    • 2011-09-01
    • Yuancheng GuoWei ChenJie Hong JianHui Ling Xu
    • Yuancheng GuoWei ChenJie Hong JianHui Ling Xu
    • H05B41/04
    • H05B41/04H05B41/044H05B41/295
    • A circuit for preheating filaments may include: a transistor; a first winding, one terminal of which being electrically connected with a collector of the transistor, and the other terminal being connected to an input of a power source; a second winding, one terminal of which being electrically connected with an emitter of the transistor, the other terminal being electrically connected with a base of the transistor, and the second winding being coupled with the first winding in a self-excitation mode; one or more load windings respectively connected with the filaments in series, and each of which being coupled with the first winding in a flyback mode; and a delay switch, configured to change into an on state from an off state when a trigger signal with a predetermined delay is received, so as to turn off the transistor.
    • 用于预热丝的电路可以包括:晶体管; 第一绕组,其一个端子与晶体管的集电极电连接,另一个端子连接到电源的输入端; 第二绕组,其一个端子与晶体管的发射极电连接,另一个端子与晶体管的基极电连接,第二绕组以自激模式与第一绕组耦合; 一个或多个负载绕组分别与灯丝串联连接,并且每个负载绕组以回扫模式与第一绕组耦合; 以及延迟开关,被配置为当接收到具有预定延迟的触发信号时,从断开状态变为导通状态,以便关断晶体管。