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14 条记录 (耗时 0.018 秒)

    Boiler system ignition sequence detector and associated methods of protecting boiler systems
    11.
    发明授权
    Boiler system ignition sequence detector and associated methods of protecting boiler systems 失效
    锅炉系统点火序列检测器及相关方法保护锅炉系统

    公开(公告)号：US06507761B1

    公开(公告)日：2003-01-14

    申请号：US09590507

    申请日：2000-06-09

    申请人： Patrick J. Keegan

    发明人： Patrick J. Keegan

    IPC分类号： G05B1101

    CPC分类号： F23N5/203 ,  F23N2023/04 ,  F23N2023/08 ,  F23N2027/22 ,  F23N2027/36

    摘要： An event detector and associated methods of protecting systems provide convenient and economical safety features. In a described embodiment, an ignition sequence detector for a boiler system has a microprocessor which is programmed so that an ignition control module of the boiler system is deprived of primary power when an improper sequence of events occurs. The ignition sequence detector includes multiple event detectors interconnected to the microprocessor, and is configured so that it is usable in high RFI environments.

    摘要翻译： 事件检测器和相关联的保护系统方法提供方便和经济的安全特征。 在所描述的实施例中，用于锅炉系统的点火顺序检测器具有微处理器，该微处理器被编程，使得当发生不正确的事件序列时，锅炉系统的点火控制模块被剥夺主要功率。 点火顺序检测器包括与微处理器互连的多个事件检测器，并且被配置为使得其可用于高RFI环境。

    Electronic ballast producing voltage having trapezoidal envelope for instant start lamps
    13.
    发明授权
    Electronic ballast producing voltage having trapezoidal envelope for instant start lamps 失效
    电子镇流器产生电压，具有立即起动灯的梯形信封

    公开(公告)号：US5982113A

    公开(公告)日：1999-11-09

    申请号：US879181

    申请日：1997-06-20

    申请人： Kent E. Crouse ,  Peter W. Shackle ,  Patrick J. Keegan ,  Ronald J. Bezdon

    发明人： Kent E. Crouse ,  Peter W. Shackle ,  Patrick J. Keegan ,  Ronald J. Bezdon

    IPC分类号： H05B41/282 ,  H05B41/285 ,  H05B37/02

    CPC分类号： H05B41/2853 ,  H05B41/282 ,  H05B41/2855 ,  H05B41/2856 ,  Y10S315/04

    摘要： An instant start ballast includes a variable frequency boost circuit and a driven half-bridge inverter having a series resonant, direct coupled, parallel output. A control circuit includes a variable frequency driver section, a multivibrator section, and a sensing section. The variable frequency driver changes frequency smoothly, i.e. without discontinuities. The multivibrator section acts as a switch that is enabled or disabled by the sensing section for controlling the frequency of the inverter. Lamp current is required for continued operation of the control circuit. The multivibrator section controls starting by causing the inverter to produce an output signal having a trapezoidal envelope. In the event of an arc, the control circuit quenches the arc and the multivibrator periodically pulses the lamp to attempt to re-start the lamp.

    摘要翻译： 瞬时启动镇流器包括可变频率升压电路和具有串联谐振，直接耦合并联输出的驱动半桥逆变器。 控制电路包括可变频率驱动器部分，多谐振荡器部分和感测部分。 可变频率驱动器平滑地改变频率，即不间断。 多谐振荡器部分用作感测部分启用或禁用的开关，用于控制变频器的频率。 控制电路的继续运行需要灯电流。 多谐振荡器部分通过使逆变器产生具有梯形包络的输出信号来控制开始。 在电弧的情况下，控制电路使电弧猝灭，并且多谐振荡器周期性地脉冲灯以试图重新启动灯。

    Electronic ballast with filament cut-out
    14.
    发明授权
    Electronic ballast with filament cut-out 失效
    电子镇流器灯丝切断

    公开(公告)号：US5973455A

    公开(公告)日：1999-10-26

    申请号：US79844

    申请日：1998-05-15

    申请人： Grigoriy Mirskiy ,  William L. Keith ,  Kent E. Crouse ,  Peter W. Shackle ,  Patrick J. Keegan ,  Ronald J. Bezdon

    发明人： Grigoriy Mirskiy ,  William L. Keith ,  Kent E. Crouse ,  Peter W. Shackle ,  Patrick J. Keegan ,  Ronald J. Bezdon

    IPC分类号： H05B41/295 ,  H05B41/36 ,  H05B37/02

    CPC分类号： H05B41/36 ,  H05B41/295 ,  Y10S315/04 ,  Y10S315/07

    摘要： An electronic ballast for a gas discharge lamp includes an AC to DC converter for changing alternating current at power line voltage to direct current and an inverter powered by the converter and having a series resonant, direct coupled output coupled to the lamp. The inverter includes an AC switch having a diode bridge defining an AC diagonal and a DC diagonal and a transistor connected across the DC diagonal. The primary winding of a filament transformer is connected across the AC diagonal of the bridge and the transistor is coupled to the microprocessor for controlling current through the primary winding. The microprocessor is programmed to close the AC switch while the lamp is starting and to open the switch after the lamp is started, thereby cutting off the filaments from a source of power and reducing the power consumed by the ballast during normal operation. A resistor in series with the transistor is used to detect filament resistance and provide an indication of lamp type.

    摘要翻译： 用于气体放电灯的电子镇流器包括用于将电力线电压下的交流电流改变为直流电的AC至DC转换器和由转换器供电的具有耦合到灯的串联谐振的直接耦合输出的逆变器。 逆变器包括AC开关，其具有限定AC对角线和DC对角线的二极管桥和跨DC对角线连接的晶体管。 灯丝变压器的初级绕组连接在桥的AC对角线上，晶体管耦合到微处理器，用于控制通过初级绕组的电流。 微处理器被编程为在灯启动时闭合AC开关，并且在灯启动之后打开开关，从而将灯丝从电源切断，并降低正常操作期间镇流器消耗的功率。 与晶体管串联的电阻器用于检测灯丝电阻并提供灯类型的指示。