High-frequency power unit for neon tubes
    1.
    发明授权
    High-frequency power unit for neon tubes 失效
    霓虹灯高频电源单元

    公开(公告)号:US5497310A

    公开(公告)日:1996-03-05

    申请号:US143740

    申请日:1993-11-01

    摘要: DC power is converted by an inverter to high-frequency power, which is supplied to the primary winding of a neon transformer. One or more neon tubes are connected in series across the secondary winding of the neon transformer. A saturable reactor is connected across the secondary winding or the neon transformer. The saturable reactor has a characteristic that its magnetic flux is saturated when the output voltage from the secondary winding of the neon transformer increases 1.1 to 2.0 times the rated voltage.

    摘要翻译: 直流电源由逆变器转换成高频电源,供给霓虹变压器的初级绕组。 一个或多个氖管串联连接在氖变压器的次级绕组上。 饱和电抗器连接在次级绕组或氖变压器两端。 饱和电抗器具有当氖变压器的次级绕组的输出电压提高到额定电压的1.1倍至2.0倍时其磁通量饱和的特性。

    Ground fault protection circuit for discharge tube lighting circuit
    2.
    发明授权
    Ground fault protection circuit for discharge tube lighting circuit 失效
    放电管照明电路接地故障保护电路

    公开(公告)号:US06621670B2

    公开(公告)日:2003-09-16

    申请号:US09842011

    申请日:2001-04-26

    IPC分类号: H02H316

    摘要: A step-up transformer is disposed on a wiring substrate 51 on which an inverter which converts a commercial a.c. power into a high frequency power and a ground fault detection circuit are mounted and within a casing 52. Lead wires 53, 54 which extend from the opposite ends of the secondary winding of the step-up transformer to the outside thereof are mounted upright on the wiring substrate 51. Coils 57, 58 are disposed on air-core bobbins 55, 56, which are threaded by the lead wires 53, 54. Outputs from the coils 57, 58 are fed to a ground fault detection circuit.

    摘要翻译: 升压变压器设置在布线基板51上,在该布线基板51上转换商业交流 将高功率功率和接地故障检测电路安装在壳体52内。从升压变压器的次级绕组的相对端延伸到其外部的引线53,54直立地安装在 布线基板51.线圈57,58设置在由引线53,54螺纹的空芯线轴55,56上。来自线圈57,58的输出被馈送到接地故障检测电路。

    Sign lamp lighting transformer with protective functions
    3.
    发明授权
    Sign lamp lighting transformer with protective functions 失效
    标志灯照明变压器具有保护功能

    公开(公告)号:US06680583B2

    公开(公告)日:2004-01-20

    申请号:US10092606

    申请日:2002-03-08

    IPC分类号: H05B3702

    CPC分类号: H05B41/2851

    摘要: An abnormality detection circuit detects abnormality relating to ground fault in secondary winding circuitry of transformer, non-grounding fault of transformer assembly casing or false connection of the AC power source to the transformer assembly in reverse polarity. An interrupter circuit turns a switch off in response to detection of the abnormality by the abnormality detection circuit to interrupt the supply of the AC power to the transformer. When the supply of the AC power is interrupted, the switch is connected to a restart circuit, whereupon the circuit is activated to allow a charging current to flow to a capacitor, which is connected in series in a drive current path of a drive circuit with a time delay on the order of 0.5 to 1.0 second which is determined by a delay circuit thereof. The charging current drives a restoring circuit, which controls the interrupter circuit to its restoring condition temporally so that the switch is turned to its “on” condition only once.

    摘要翻译: 异常检测电路检测变压器次级绕组电路中的接地故障,变压器总成壳体的非接地故障或交流电源与变压器组件的极性相反的异常。 断续电路响应于异常检测电路的异常检测而断开,以中断向变压器供电的交流电。 当交流电源的供应中断时,开关连接到重启电路,由此电路被激活以允许充电电流流向电容器,电容器串联连接在驱动电路的驱动电流路径中, 由延迟电路确定的0.5至1.0秒的时间延迟。 充电电流驱动恢复电路,其将断续器电路在时间上控制到其恢复状态,使得开关仅转换到其“接通”状态一次。