Two level inverter circuit
    1.
    发明授权
    Two level inverter circuit 失效
    两级逆变电路

    公开(公告)号:US4029993A

    公开(公告)日:1977-06-14

    申请号:US642014

    申请日:1975-12-18

    IPC分类号: H02J9/06 H02M7/538 H05B41/29

    摘要: An emergency lighting system includes a two-level switching transistor inverter circuit for starting and operating a fluorescent lamp from a battery upon failure of line voltage. One of the switching transistors of the two transistor inverter is arranged for connection first to a tap, then to one of the feed-in terminals of an output transformer coupled with the lamp. A timing controller effects this switching thereby automatically to provide, first, a high power level for starting the lamp, and then, a second lower power level for operating the lamp after starting.

    摘要翻译: 应急照​​明系统包括用于在线路电压故障时从电池启动和操作荧光灯的两电平开关晶体管反相器电路。 两个晶体管反相器的开关晶体管之一被布置成首先连接到抽头,然后被布置成与灯连接的输出变压器的馈入端子之一。 定时控制器自动实现该切换,从而自动地提供用于启动灯的高功率电平,然后提供用于在启动之后操作灯的第二较低功率电平。

    Inverter lockout circuit
    3.
    发明授权
    Inverter lockout circuit 失效
    变频器锁定电路

    公开(公告)号:US4063108A

    公开(公告)日:1977-12-13

    申请号:US646009

    申请日:1976-01-02

    IPC分类号: H02J9/06 H02M7/538 H02J9/00

    摘要: An emergency lighting system includes a switching transistor inverter circuit for starting and operating a fluorescent lamp from a battery upon failure of line voltage. A lockout arrangement serves to shut down inverter operation should the lamp be removed from its fixture. Included is an interlock in the lamp fixture and circuitry responsive to an open condition at the interlock to ground the input to a system controller inhibit function thereby to effect removal of battery power from the inverter circuit.

    摘要翻译: 应急照​​明系统包括用于在线路电压故障时从电池启动和操作荧光灯的开关晶体管反相器电路。 如果灯从其固定装置中取出,则锁定装置用于关闭逆变器操作。 包括灯具和电路中的互锁,其响应于互锁处的打开状态,以将输入接地到系统控制器的禁止功能,从而实现从逆变器电路中去除电池电力。