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    Electronic ballast for hot cathode discharge lamps
    1.
    发明授权
    Electronic ballast for hot cathode discharge lamps 失效
    电子镇流器用于热阴极放电灯

    公开(公告)号：US5565740A

    公开(公告)日：1996-10-15

    申请号：US517302

    申请日：1995-08-21

    申请人： Akinori Hiramatsu ,  Hiroyuki Sako ,  Kazuhiro Gotoh ,  Nobukazu Miki

    发明人： Akinori Hiramatsu ,  Hiroyuki Sako ,  Kazuhiro Gotoh ,  Nobukazu Miki

    IPC分类号： H02M7/48 ,  H05B41/24 ,  H05B41/282 ,  H05B41/295 ,  H05B37/02

    CPC分类号： H05B41/295 ,  Y10S315/07

    摘要： An electronic ballast for hot cathode discharge lamp comprises a DC voltage source, a chopper, and an inverter. The chopper includes a switching element connected in series with an inductor across the DC voltage and driven to turn on and off for providing a periodically interrupted voltage which is smoothed by a capacitor to produce a smoothed DC voltage as a chopper output. The inverter includes at least one switching element which is coupled to the chopper output to produce therefrom a high frequency AC voltage as an inverter output to be applied to cathodes of the discharge lamp for lighting the discharge lamp. The ballast is characterized to include an inverter controller and a delay circuit. The inverter controller controls the inverter to operate selectively in a normal mode of providing the inverter output of a first level and in a limited mode of providing the inverter output of a second level which is lower than the first level and is determined to give a preheating current to the cathodes. The delay circuit delays the start-up of the inverter for a time period from the start-up of the chopper. The inverter controller controls the inverter to operate in the limited mode after the start-up of the inverter for a predetermined period for preheating the discharge lamp after which the inverter controller allows the inverter to operate in the normal operation mode for lighting the discharge lamp.

    摘要翻译： 一种用于热阴极放电灯的电子镇流器包括直流电压源，斩波器和逆变器。 斩波器包括与跨越直流电压的电感器串联连接的开关元件，并被驱动以导通和截止，以提供由电容器平滑以产生平滑的直流电压作为斩波器输出的周期性中断的电压。 逆变器包括至少一个开关元件，该开关元件耦合到斩波器输出，从而产生高频AC电压作为逆变器输出，以施加到用于点亮放电灯的放电灯的阴极。 该镇流器的特征在于包括逆变器控制器和延迟电路。 逆变器控制器控制逆变器在提供第一电平的逆变器输出的正常模式下选择性地操作，并且在限制模式中提供低于第一电平的第二电平的逆变器输出，并且被确定为给出预热 电流到阴极。 延迟电路延迟从斩波器启动起的一段时间内的逆变器启动。 逆变器控制器在逆变器控制器允许逆变器在用于照明放电灯的正常操作模式下操作的预定放电灯的预定时间之后，控制逆变器在变频器启动之后以限制模式操作。

    Inverter AC power supply
    2.
    发明授权
    Inverter AC power supply 失效
    变频器交流电源

    公开(公告)号：US5563777A

    公开(公告)日：1996-10-08

    申请号：US288090

    申请日：1994-08-10

    申请人： Nobukazu Miki ,  Toshiya Kanja ,  Koji Nishiura ,  Akinori Hiramatsu

    发明人： Nobukazu Miki ,  Toshiya Kanja ,  Koji Nishiura ,  Akinori Hiramatsu

    IPC分类号： H02M7/06 ,  H02M7/48 ,  H05B41/24 ,  H05B41/28 ,  H05B41/282 ,  H02M5/45

    CPC分类号： H02M1/425 ,  H02M7/53832 ,  H05B41/28 ,  H05B41/2825 ,  Y02B20/185 ,  Y02B70/126 ,  Y02B70/1441

    摘要： A inverter AC power supply comprises a chopper connected to receive an AC voltage from a low frequency AC voltage source to provide a smoothed DC voltage, and an inverter providing a high frequency AC voltage from the smoothed DC voltage for driving a load. The chopper includes an inductor and a series connected pair of first and second switching elements which alternately turn on and off for periodically interrupting an input AC voltage to store a resulting energy to the inductor which is subsequently released to charge a smoothing capacitor to give a smoothed DC voltage there across. The inverter shares the first and second switching elements with the chopper and comprises a L-C resonant circuit which is connected across one of the first and second switching elements together with the load to provide an oscillating voltage as the high frequency AC voltage to the load. A self-excitation control circuit is included in the inverter to acknowledge a change in the oscillating voltage. The self-excitation control circuit is connected to control terminals of the first and second switching elements in order to alternately turn on and off the first and second switching elements in response to the change in the oscillating voltage.

    摘要翻译： 逆变器交流电源包括连接成从低频交流电压源接收交流电压以提供平滑的直流电压的斩波器，以及用于驱动负载的平滑的直流电压提供高频交流电压的逆变器。 斩波器包括电感器和串联的第一和第二开关元件对，其交替地导通和截止以周期性地中断输入AC电压以将所产生的能量存储到电感器，该电感器随后被释放以对平滑电容器充电以给出平滑的 直流电压在那里。 逆变器与斩波器共享第一和第二开关元件，并且包括L-C谐振电路，其连接到第一和第二开关元件中的一个与负载一起，以向负载提供作为高频AC电压的振荡电压。 逆变器中包含一个自励控制电路，以确认振荡电压的变化。 自励控制电路连接到第一和第二开关元件的控制端子，以便响应于振荡电压的变化交替地接通和断开第一和第二开关元件。

    Power supply
    3.
    发明授权
    Power supply 失效
    电源

    公开(公告)号：US5495149A

    公开(公告)日：1996-02-27

    申请号：US65247

    申请日：1993-05-20

    申请人： Akinori Hiramatsu ,  Hiroyuki Sako ,  Kazuhiro Gotoh ,  Nobukazu Miki ,  Seiji Soga ,  Naokage Kishimoto

    发明人： Akinori Hiramatsu ,  Hiroyuki Sako ,  Kazuhiro Gotoh ,  Nobukazu Miki ,  Seiji Soga ,  Naokage Kishimoto

    IPC分类号： H02H7/122 ,  H05B41/24 ,  H05B41/282 ,  H05B41/285 ,  H05B41/295 ,  H05B41/298 ,  H05B37/02

    CPC分类号： H05B41/2855 ,  H05B41/282 ,  H05B41/295 ,  H05B41/2985 ,  Y02B20/183 ,  Y10S315/07

    摘要： A power supply for driving one or more loads includes a DC voltage source, an inverter connected to the DC voltage source for providing a high frequency AC voltage at its output end, and an output transformer having a primary winding and a secondary winding. The primary winding is coupled to the output end of the inverter through a tuning inductor, while the secondary winding is coupled to the load. A tuning capacitor, which constitutes a resonant circuit in cooperation with the resonance inductance for supplying a resonance current to the load, is connected across the secondary winding of the output transformer in parallel relation to the load. The tuning capacitor is arranged in circuit on the opposite side of the secondary winding from the load such that the tuning capacitor is open-circuited when the load is disconnected from the secondary winding.

    摘要翻译： 用于驱动一个或多个负载的电源包括DC电压源，连接到DC电压源的反相器，用于在其输出端提供高频AC电压，以及具有初级绕组和次级绕组的输出变压器。 初级绕组通过调谐电感器耦合到逆变器的输出端，而次级绕组耦合到负载。 与谐振电感配合构成谐振电路的调谐电容器与负载并联地连接在输出变压器的次级绕组的两端。 调谐电容器布置在次级绕组与负载相对的电路中，使得当负载与次级绕组断开时调谐电容器开路。