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    Shielded starting coil for an electrodeless high intensity discharge lamp
    1.
    发明公开
    Shielded starting coil for an electrodeless high intensity discharge lamp 失效
    用于无电极高强度放电灯筛选点火线圈。

    公开(公告)号：EP0520716A1

    公开(公告)日：1992-12-30

    申请号：EP92305690.7

    申请日：1992-06-22

    申请人： GENERAL ELECTRIC COMPANY

    发明人： El-Hamamsy, Sayed-Amr Ahmes ,  Blackmore, John William

    IPC分类号： H05B41/16

    CPC分类号： H05B41/2806 ,  H05B41/24 ,  Y02B20/22

    摘要： A passive, resonant starting circuit for an electrodeless HID lamp (10) includes a starting coil (Lst) that is shielded from stray capacitances that would otherwise result in detuning the resonant circuit and hence decreasing efficiency. The starting circuit (40) further includes a capacitance (Csts) coupled in series with the starting coil (Lst) and another capacitance (Cstp) coupled in parallel with the coil (Lst). In a preferred embodiment, the starting coil (Lst) is enclosed in a conductive cylindrical housing (42) which functions as both a shield from external capacitances and the resonant capacitance in parallel with the starting coil (Lst). The housing (42) has a lengthwise gap (44) in order to prevent the housing (42) from acting as a short circuit secondary with respect to the starting coil (Lst). A conductive disk (46) is mounted to the ground end of the housing (42) to increase shielding even further. The parallel resonant capacitance is determined by the length of the housing (42) and the distance between the coil (Lst) and the housing (42).

    摘要翻译： 在无电极HID灯的无源谐振启动电路（10）包括一个起始线圈（LST）并从杂散电容确实否则将导致失谐的谐振电路，并因此降低效率屏蔽。 起动电路（40）还包括串联耦合的耦合在与所述线圈（LST）并行起动线圈（LST）和另一个电容（CSTP）的电容（技术服务小组）。 在优选实施方案中，起始线圈（LST）被封闭在一个圆柱形导电壳体（42）同时作为从外部电容屏蔽件和平行于起动线圈（LST）的谐振电容哪些功能。 所述壳体（42）具有以防止壳体（42）从作为短路次级相对于所述起始线圈（LST）的纵向间隙（44）。 导电盘（46）安装到所述壳体（42），以增加屏蔽甚至进一步的接地端。 并联谐振电容确定的由所述外壳（42）和线圈（LST）和所述壳体（42）之间的距离的长度开采。