ELEKTRONISCHES VORSCHALTGERÄT
    42.
    发明公开

    公开(公告)号:EP1048190A1

    公开(公告)日:2000-11-02

    申请号:EP98964410.9

    申请日:1998-11-19

    IPC分类号: H05B41/29

    CPC分类号: H05B41/2981

    摘要: The invention relates to an electronic lamp ballast for operating at least one gas-discharge lamp (G1, G2). The electronic lamp ballast comprises a control circuit (IC2), which monitors a voltage potential applied to the input connection (NP) and, depending on the value of the voltage potential, operates the gas-discharge lamp (G1, G2) with or without preheating. The voltage potential monitored by the control circuit (IC2) can in particular depend on the charge status of an energy storage circuit (R22, C17) which is charged while the gas-discharge lamp (G1, G2) is operating and is discharged at a certain time constant when the electronic lamp ballast is switched off. This allows for dynamic switching between cold-start and warm-start operations.

    ELEKTRONISCHES VORSCHALTGERÄT
    43.
    发明公开

    公开(公告)号:EP1040733A1

    公开(公告)日:2000-10-04

    申请号:EP98962360.8

    申请日:1998-11-19

    IPC分类号: H05B41/29 H05B41/38

    CPC分类号: H05B41/2981

    摘要: The invention relates to an electronic lamp ballast for operating gas-discharge lamps (G1, G2), where the electronic lamp ballast is controlled by means of a control circuit (IC2). The control circuit (IC2) controls the operation of the electronic lamp ballast in accordance with certain predetermined operating states (I - VIII) in which the control circuit (IC2) monitors certain status variables of the electronic lamp ballast or of a gas-discharge lamp (G1, G2) in accordance with the operating status. It changes from one operating status to a new operating status only if the status variables being monitored meet a condition assigned to the current operating status.

    Fluorescent lamp controllers
    47.
    发明公开
    Fluorescent lamp controllers 失效
    SteuerungsschaltungenfürLeuchtstofflampen。

    公开(公告)号:EP0351012A2

    公开(公告)日:1990-01-17

    申请号:EP89201814.4

    申请日:1989-07-10

    IPC分类号: H05B41/29

    摘要: The invention relates to a controller for a fluorescent lamp load, comprising DC-AC converter means (24) having an input and an output, DC supply means coupled to said input, output circuit means coupled to said output and arranged for coupling to said fluorescent lamp load (12), and control means (36) for controlling operation of said DC-AC converter and said DC supply means, said output circuit means including inductance means and resonant capacitor means forming a circuit (20) which is resonant at no-load and load-condition resonant frequencies with loads equivalent to those respectively obtained prior to and after lamp ignition.
    The control means (36) are arranged to operate in a lamp ignition phase to operate said converter at a frequency above the no-load resonant frequency of the output circuit means and to operate in an operating phase after lamp ignition to operate said converter in a frequency range above the load-condition resonant frequency of the output circuit means.
    The DC supply means comprise an up-converter (28) and the control means (36) include pulse width modulator means for applying high frequency gating pulses to said up-converter, which have a width so controlled as to maintain the DC output voltage of the DC supply means at a substantially constant level while also obtaining an input current wave form which is proportional to and in phase with the input voltage wave form.
    The control means include means for synchronizing the generation of said high frequency pulse width modulated gating pulses with a variable frequency signal applied to said DC-AC converter means.

    摘要翻译: 本发明涉及一种用于荧光灯负载的控制器,包括DC-AC转换器装置(24),其具有耦合到所述输入端的输入和输出DC供电装置,输出电路装置耦合到所述输出并被布置成耦合到所述荧光灯 灯负载(12)和用于控制所述DC-AC转换器和所述DC供电装置的操作的控制装置(36),所述输出电路装置包括电感装置和谐振电容器装置,形成电路(20) 负载和负载条件谐振频率,其负载与灯点火之前和之后分别获得的负载相同。 控制装置(36)布置成在灯点火阶段中工作,以高于输出电路装置的空载谐振频率的频率操作所述转换器,并且在灯点火之后在操作阶段中操作以在 频率范围高于输出电路装置的负载状态谐振频率。 直流电源装置包括上变换器(28),并且控制装置(36)包括脉冲宽度调制器装置,用于将高频选通脉冲施加到所述上变频器,所述上变频器的宽度被如此控制以保持直流输出电压 DC电源装置处于基本恒定的电平,同时还获得与输入电压波形成比例并且与其成相位的输入电流波形。 控制装置包括用于使所述高频脉冲宽度调制门控脉冲的产生与施加到所述DC-AC转换器装置的可变频率信号同步的装置。

    Vorschaltgerät für eine Entladungslampe
    48.
    发明公开
    Vorschaltgerät für eine Entladungslampe 失效
    Vorschaltgerätfüreine Entladungslampe。

    公开(公告)号:EP0338109A1

    公开(公告)日:1989-10-25

    申请号:EP88106325.9

    申请日:1988-04-20

    IPC分类号: H05B41/29

    CPC分类号: H05B41/2981 H05B41/2828

    摘要: Ein Vorschaltgerät für eine Entladungslampe (L) enthält in üblicher Weise einen von einer Gleichspannungsquelle (B) gespeisten Wechselrichter (C), der die Wechelspannung für die Entladungslampe (L) erzeugt. Die Entladungslampe (L) liegt parallel zur Kapazität (C10) eines Serienresonanz­kreises (L6/C10). Dem Wechselrichter (C) wird von einem variablen Frequenzgenerator (6,7,8,9,15,16) eine Wechsel­spannung variabler Frequenz zugeführt. Die Frequenz des variablen Frequenzgenerators ist von einer Steuereinheit (10) steuerbar. Der Steuereinheit werden Steuersignale zugeführt, die verschiedenen Parametern des Vorschaltgerätes entsprechen. Diese Parameter sind die Lampenspannung, der Lampenstrom, die Gleichstromleistung, die Gleichstrom­spannung, eine Niedervoltgleichspannung und der Phasenwinkel des Lastkreises (E) für den Wechselrichter (C). Die Reaktion der Steuereinheit (10) auf Veränderungen der erwähnten Parameter besteht in einer Veränderung der Frequenz des Frequenzgenerators oder in einem Abschalten des Frequenzgenerators oder des Wechselrichters (C).

    摘要翻译: 用于放电灯(L)的镇流器以常规方式包含从直流电压源(B)供应的逆变器(C),该逆变器产生用于放电灯(L)的交流电压。 放电灯(L)与串联谐振电路(L6 / C10)的电容器(C10)并联设置。 可变频率交流电压从可变频率发生器(6,7,8,9,15,16)提供给逆变器(C)。 变频发生器的频率可由控制单元(10)控制。 控制信号被提供给控制单元,该信号对应于镇流器的各种参数。 这些参数是逆变器(C)的灯电压,灯电流,直流电力,直流电压,低压直流电压和负载电路(E)的相位角。 控制单元(10)对所述参数变化的反应是改变频率发生器的频率或关闭频率发生器或逆变器(C)。

    Electronic ballast circuit for fluorescent lamps
    49.
    发明公开
    Electronic ballast circuit for fluorescent lamps 失效
    ElektronischesVorschaltgerätfürLeuchtstofflampen。

    公开(公告)号:EP0178852A1

    公开(公告)日:1986-04-23

    申请号:EP85307269.2

    申请日:1985-10-10

    发明人: Grubbs, Calvin E.

    IPC分类号: H05B41/29

    摘要: An electronic ballast circuit for fluorescent or other gaseous discharge lamps includes a resonant half-bridge inverter circuit. The source voltage to the inverter is a full-wave rectified line voltage together with a DC carry-over voltage for supplying power in the inter-cusp period of the rectified line voltage. A negative feedback circuit is responsive to lamp current to vary the inverter drive frequency and thereby regulate lamp current. The frequency response of the feedback loop is high enough and the gain-versus- frequency response of the inverter is such that lamp current and voltage are regulated to reduce the crest factor of lamp current to compensate for variation in the amplitude of the voltage across the semiconductor switches.

    摘要翻译: 用于荧光灯或其他气体放电灯的电子镇流器电路包括谐振半桥逆变器电路。 逆变器的源极电压为全波整流线电压以及直流输出电压,用于在整流线电压的中间期供电。 负反馈电路响应于灯电流来改变逆变器驱动频率,从而调节灯电流。 反馈环路的频率响应足够高,并且逆变器的增益 - 频率响应使得灯电流和电压被调节以减小灯电流的波峰因数,以补偿横跨电压的电压幅度的变化 半导体开关