• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to the field of electrical engineering, in particular to the power supply sources of gas discharge lamps with heated electrodes. The aim of the invention is to limit overvoltages on the inverter elements. The inverter contains two alternately controlled switches 1, 2 controlled by a control unit 3 containing a current transformer. The load circuit is made in the form of a series-connected capacitor 7, a gas-discharge lamp 8 with heated electrodes, control windings and throttles 12. Throttle 12 and capacitor 13 form a circuit, loi O) co wed sd N3 S
    公开号:SU1351527A3
    申请号:SU833673666
    申请日:1983-12-13
    公开日:1987-11-07
    发明作者:Круммель Петер
    申请人:Сименс Аг (Фирма)；
    IPC主号:
    专利说明:

    determining resonant frequency. The introduction of a protection node consisting of a voltage-dependent resistor 14 connected in series with a capacitor 15, in parallel with which a threshold element is connected and connected to an input of the protective type. The invention relates to the field of electrical engineering, in particular to the power sources of gas discharge lamps with heated electrodes.
    The purpose of the invention is to limit overvoltages on the inverter elements.
    FIG. 1 shows a schematic diagram of an inverter; in fig. 2 shows inverter operation diagrams showing the relationship between frequency and voltage in a gas discharge lamp.
    The inverter contains two alternately controlled switches on the transistor pax 1 and 2, controlled by the control unit 3 for alternate switching, containing a current transformer, the primary winding A of which is connected to the load circuit, and the secondary windings 5 and 6 are connected to the control inputs Circuit breakers The load circuit is made in the form of a series-connected oscillating capacitor 7, a gas discharge lamp with heated electrodes 9 and 10, control windings 11 and throttles 12. Electrodes 9 and 10 of the lamp 8 are connected in series cut capacitor 13, and this capacitor and agricultural dros- defined by l. resonant frequency (,. The operating frequency f of the inverter is determined by selecting the parameters of the current transformer versus choosing the parameters of the inverter and its load circuit. It must always be higher than the resonant frequency of the load circuit so that there is a phase without current between locking one transistor and controlling another - a zistor.
    The voltage-dependent resistor 14 forms in series with the conistoror 17, which shunts one of the transformer windings of the control unit, and, if there is a malfunction in the power circuit of the converter and increases the voltage on its main elements, breaks the oscillations of the inverter. 2 Il.
    The detector 15 has a parallel branch, which is parallel to the current transformer inductor 12 connected in series with the current transformer and the second transistor 2 of the inverter. Thus, the capacitor 15 with the conductive transistor 2 through the capacitors 13 and 7 from the storage capacitor 16 is charged and in the same way with the conductive transistor 1 is recharged as soon as the maximum voltage of the resistor 14 is reached.
    A control unit is connected to the capacitor 15 for the current-dependent inverter tripping. To disconnect, a thyristor 17 is used, which is supplied with a constant voltage and to which the control winding 11 of the current transformer is connected in parallel through a diode 18. The control gap of this thyristor is connected through a switching diode 19 to a resistive-capacitive link, which is connected via a resistor 20 and a diode 21 to a capacitor 15 in parallel. If the voltage in the capacitor 22 reaches the limit value determined by the diode 19, the thyristor 17 becomes conductive and shorts the control winding so that the inverter transistors no longer receive control voltages. At the same time, the ignition capacitor 22, which is parallel to the thyristor, is also short-circuited, the voltage of which causes the inverter to start through the switching diode 23. This state remains until the thyristor holding circuit is interrupted by replacing the lamp 8.
    The ordinate (Fig. 2) shows the voltage Ug of the gas discharge lamp, which is also the voltage of a capacitor of a series resonant circuit. The abscissa shows the frequency f, KR1 denotes the voltage curve in the lamp and the capacitor in the ignition mode. The inverter then operates at the operating frequency fg, which is the voltage Ugj of the lamp. Over the resonant frequency of the received wave, (with lossy resonant circuits, the resonant frequency is located slightly to the right of the indicated value and not at the maximum voltage of the capacitor). This resonant frequency is a function of the voltage U of the lamp (curve K2). From it, the K1 curve shifted parallel to the right, which shows the dependence of the voltage Ug, originates. from the working frequency f,
    If, for example, instead of the operating frequency fg, a lower operating frequency fg was set (which without the invention would entail a correspondingly high lamp voltage), then the voltage of the lamp increases along the K1 curve only slightly to the value Ugj, since simultaneously the resonant frequency decreases along the K2 curve to f and the KR2 curve is decisive.
    A shift in the operating frequency in the opposite direction is allowed up to the limit value fg with the corresponding KRG curve. The choice of the parameters of the circuit elements must be carried out in such a way that the highest considered operating frequency does not exceed this limit value, so that the operating point in the conductive section of the voltage-dependent resistor 14 is provided.
    R
    . After igniting the lamp, its operating voltage U is almost stable. In the normal mode of the inverter, when the lamp is burning, the dependent
    the voltage from the resistor 14 is practically de-energized and does not cause a loss.
    five
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    An inverter for supplying a gas discharge lamp with heated electrodes,
    A circuit containing two alternately controlled switches located parallel to the first switch of the load circuit, which through the second switch is connected to the source
    5 constant voltage and made in the form of a series-connected dynamic capacitor, a series resonant circuit with a choke and a capacitor and a gas discharge lamp with heated electrodes connected to each other through a series resonant circuit capacitor, the control unit for alternate switching
    5 switches, where the resonant frequency of the resonant circuit with an unlit gas discharge lamp is lower than the operating frequency of the inverter defined by the control unit, about one liter and Q because in order to limit the voltages on the inverter elements, a voltage-dependent source and an additional capacitor are introduced connected in a series circuit connected in parallel to a branch consisting of a throttle or a capacitor of a series resonant circuit and a second switch, and the parameters of the working
    Voltage-dependent point re-. The resistors are chosen from the condition that the operating point at the highest operating frequency taken into account in the ignition mode of the gas discharge lamp always lies in the conductive part and only when the lamp is lit, in the de-energized part of the characteristic.
    five
    KRG
    pu, flfs)
    Editor N. Dumbass
    Compiled by V. Moin Tehred A. Kravchuk
    Order 5302/59 Circulation 799 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    CorrectorN. King
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    公开号 | 公开日
    FI77135B|1988-09-30|
    DK159038B|1990-08-20|
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    DK159038C|1991-01-28|
    FI834184A0|1983-11-15|
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    DK577083D0|1983-12-14|
    EP0113451B1|1987-10-14|
    DK577083A|1984-06-16|
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    引用文献:
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    NL185746B|1984-11-09|1990-02-01|Maars Holding Bv|DEVICE FOR DEPENDING ON AMBIENT LIGHT FROM ONE LOW-FREQUENT AC VOLTAGE SOURCE OF ONE OR MORE FLUORESCENT LAMPS.|
    US4798583A|1984-11-16|1989-01-17|Walter Beck|Method and apparatus for aspirating secreted fluids from a wound|
    DE3441992A1|1984-11-16|1986-05-22|Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München|CIRCUIT ARRANGEMENT FOR IGNITING A LOW-PRESSURE DISCHARGE LAMP|
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    GB8522778D0|1985-09-14|1985-10-16|Contrology Ltd|Lamp supply circuit|
    DE3611611A1|1986-04-07|1987-10-08|Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh|CIRCUIT ARRANGEMENT FOR HIGH-FREQUENCY OPERATION OF A LOW-PRESSURE DISCHARGE LAMP|
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    DK0610642T3|1993-01-29|1997-09-01|Magnetek Spa|Inverters for supplying discharge lamps with heated electrodes with resonant circuits.|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19823246454|DE3246454A1|1982-12-15|1982-12-15|INVERTER WITH A LOAD CIRCUIT CONTAINING A SERIES RESONANCE CIRCUIT AND A DISCHARGE LAMP|
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