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    • 3. 发明申请
    • LIGHTING DEVICE WITH A PROTECTION CIRCUIT HAVING DISABLE WINDING
    • 带有具有断电绕组的保护电路的照明装置
    • US20140175984A1
    • 2014-06-26
    • US13721211
    • 2012-12-20
    • GENERAL ELECTRIC COMPANY
    • James Dominic MieskoskiGang Yao
    • H05B41/36
    • H05B41/391
    • This disclosure describes embodiments of a lighting device with circuitry that can manage current and voltage levels across a plurality of fluorescent lamps. In one embodiment, the circuitry has cross-coupled inductors in series with a pair of lamp sockets. This configuration of components causes fluorescent lamps installed in the lamp sockets to generate substantially the same amount of light by drawing approximately equivalent current throughout the entire operable range of a dimmer control. The circuitry also includes a protection circuit with a winding magnetically coupled with the cross-coupled inductors and a control circuit that can cause impedance across the winding to change from a first impedance to a second impedance in response to operating conditions in the lamps. This feature avoids high operating voltages that can occur across the cross-coupled inductors when one of the fluorescent lamps is inoperable and/or removed from the lamp sockets.
    • 本公开描述了具有可以管理跨越多个荧光灯的电流和电压电平的电路的照明装置的实施例。 在一个实施例中,电路具有与一对灯插座串联的交叉耦合电感器。 组件的这种配置使安装在灯座中的荧光灯通过在调光器控制的整个可操作范围内绘制大致相等的电流来产生基本相同量的光。 电路还包括具有与交叉耦合电感器磁耦合的绕组的保护电路,以及响应于灯中的操作条件,可以使线圈两端的阻抗从第一阻抗变为第二阻抗的控制电路。 该特征避免了当一个荧光灯不能操作和/或从灯插座移除时跨交叉电感器发生的高工作电压。