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92 条记录 (耗时 0.019 秒)

    Controlling and measuring the functions of an electronic ballast
    1.
    发明授权
    Controlling and measuring the functions of an electronic ballast 有权
    控制和电子镇流器的功能测量

    公开(公告)号：EP2271187B1

    公开(公告)日：2017-04-19

    申请号：EP10163702.3

    申请日：2010-05-24

    申请人： Helvar Oy Ab

    发明人： Vihinen, Hannu

    IPC分类号： H05B41/282 ,  H05B41/285 ,  H05B41/292 ,  H05B41/298

    CPC分类号： H05B41/2851 ,  H05B41/2825 ,  H05B41/2921 ,  H05B41/2981

    摘要： The invention relates to a lamp for producing illuminating radiation, said lamp comprising an electronic ballast 102 for establishing an ignition voltage for the lamp in order to initiate the production of illuminating radiation, said electronic ballast 102 comprising at least two switching transistors Q1, Q2 for supplying current to at least one coil L1 which develops the lamp ignition voltage, and the electronic ballast 102 having a control circuit 104 integrated therewith. The electronic ballast 102 comprises at least two resistors R8 and R10 arranged at least in a series connection relative to each other for measuring and/or regulating the currents of said at least two switching transistors Q1 and Q2, said resistor R8 being in connection with the switching transistor Q2 and the resistor R10 being in a series connection with the resistor R8 and with a voltage source. The electronic ballast 102 comprises the series connection of said resistors R8 and R10 for operating said control circuit 104 in order to detect whether a current passing through the switching transistor Q1 or Q2 is overly high with respect to a limit current value set for the control circuit, and by operating said control circuit 104, for immediately switching off the control of that switching transistor Q1 or Q2 which switching transistor Q1 or Q2 has been found with an overly high passing current and for immediately switching on the current of the other switching transistor Q1 or Q2.

    Vorschaltgerät für Gasentladungslampen
    4.
    发明公开
    Vorschaltgerät für Gasentladungslampen 审中-公开
    VorschaltgerätfürGasentladungslampen

    公开(公告)号：EP2219423A2

    公开(公告)日：2010-08-18

    申请号：EP10000003.3

    申请日：2010-01-04

    申请人： Vossloh-Schwabe Deutschland GmbH

    发明人： Cernek, Markus ,  Abele, Manfred ,  Braunschmid, Peter

    IPC分类号： H05B41/298

    CPC分类号： H05B41/2981 ,  H02M2001/0009

    摘要： Für ein elektronisches Vorschaltgerät (1) mit eine Steuerschaltung (12) und einem Wechselrichter (5) zum Betrieb von Niederdruck-Gasentladungslampen (2) ist eine Stromerfassungsschaltung (15, 15a, 15b, 15c) vorgesehen, die den erfassten Strom i mit einem variablen Proportionalitätsfaktor k in ein entsprechendes Signal S umsetzt rund an einem Signaleingang der Steuerschaltung (12) liefert. Die Steuerschaltung (12) passt dem Proportionalitätsfaktor k in Abhängigkeit von verschiedenen Betriebsarten, die sie einnimmt, jeweils so an, dass der Proportionalitätsfaktor den jeweils zweckmäßigen Wert k1 oder k2 annimmt. Dadurch ist es möglich, eine korrekte Stromüberwachung auch bei extremen Betriebsarten wie Zündbetrieb oder Dimmbetrieb durchzuführen.

    摘要翻译： 串联连接单元（1）具有串联连接有两个开关（6,7）的逆变器模块（5）。 其中一个开关与工作电压（B）连接，另一个开关通过电流检测开关与地相连。 电流检测器开关从电流（i）流过，并且在信号输出（16）处产生与具有比例因子的电流成比例的信号（S）。

    Ballast with output ground-fault protection
    6.
    发明公开
    Ballast with output ground-fault protection 审中-公开
    镇流器与接地故障保护ausgangseitigem

    公开(公告)号：EP1740023A3

    公开(公告)日：2009-07-08

    申请号：EP06013141.4

    申请日：2006-06-26

    申请人： OSRAM-SYLVANIA INC.

    发明人： Yadlapalli, Naveen

    IPC分类号： H05B41/285 ,  H05B41/298

    CPC分类号： H05B41/2981 ,  H05B41/2851 ,  H05B41/2986 ,  Y02B20/186

    摘要： A ballast (10) for powering at least one gas discharge lamp (40) includes an EMI filter (100), a full-wave rectifier (200), a DC-to-DC converter (300), an inverter (400), an output circuit (500), and a microcontroller (600). In response to an output ground-fault condition wherein at least one output terminal (502,504,506,508) of the ballast (20) is shorted to earth ground, the microcontroller (600) directs the DC-to-DC converter (300) to remain in a non-operating mode wherein the output voltage of the DC-to-DC converter (600) is substantially zero, thereby protecting the inverter (400) from damage. Preferably, the microcontroller (600) monitors a voltage across a DC blocking capacitor (530) within the output circuit (500) prior to startup of the DC-to-DC converter (300) in order to determine if an output ground-fault condition is present.

    Fluorescent lamp controllers
    10.
    发明公开
    Fluorescent lamp controllers 失效
    荧光灯控制器

    公开(公告)号：EP0351012A3

    公开(公告)日：1990-08-29

    申请号：EP89201814.4

    申请日：1989-07-10

    申请人： Philips Electronics N.V.

    发明人： Fellows, Mark ,  Wong, John ,  Toy, Edmond

    IPC分类号： H05B41/29

    CPC分类号： H05B41/2981 ,  H05B41/28 ,  Y10S315/02

    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.