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    • 1. 发明授权
    • Neon sign power supply circuit with automatic power interruption
    • 霓虹灯电源电路自动断电
    • US5291099A
    • 1994-03-01
    • US900955
    • 1992-06-18
    • John M. GillRobert H. Clausing
    • John M. GillRobert H. Clausing
    • H02H3/12H05B41/232H05B41/285H05B37/00
    • H02H3/12H05B41/232H05B41/2855
    • A power supply circuit for a neon tube includes a step-up power transformer having a primary winding connectable to a power source, a secondary winding to which the neon tube is connected, and an auxiliary winding which is used to sense if the secondary winding is loaded or not and develops a control voltage proportional to current flowing through the neon tube, the control voltage maintaining a relay operated so that the primary winding of the transformer is connected to the power source in the absence of load fault conditions, a load fault condition causing the control voltage to decrease below the level required to maintain the relay operated, so that the primary winding of the transformer is disconnected from the power source, interrupting high voltage in the secondary winding of the transformer.
    • 用于氖管的电源电路包括升压电力变压器,其具有可连接到电源的初级绕组,连接氖管的次级绕组和用于感测次级绕组是否为辅助绕组的辅助绕组 加载或不加载,并且产生与流过氖管的电流成比例的控制电压,控制电压保持继电器操作,使得变压器的初级绕组在没有负载故障条件,负载故障条件下连接到电源 使控制电压降低到维持继电器运行所需的电平以下,使变压器的初级绕组与电源断开,从而中断变压器次级绕组中的高电压。