EP0707437B1 - Circuit pour alimenter une ou plusieurs lampes à décharge - Google Patents

Circuit pour alimenter une ou plusieurs lampes à décharge Download PDF

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Publication number
EP0707437B1
EP0707437B1 EP95115565A EP95115565A EP0707437B1 EP 0707437 B1 EP0707437 B1 EP 0707437B1 EP 95115565 A EP95115565 A EP 95115565A EP 95115565 A EP95115565 A EP 95115565A EP 0707437 B1 EP0707437 B1 EP 0707437B1
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EP
European Patent Office
Prior art keywords
inverter
circuit
pressure discharge
low
circuit arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95115565A
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German (de)
English (en)
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EP0707437A3 (fr
EP0707437A2 (fr
Inventor
Ulrich Dr. Roll
Ludwig Reiser
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Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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Publication of EP0707437A2 publication Critical patent/EP0707437A2/fr
Publication of EP0707437A3 publication Critical patent/EP0707437A3/fr
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Publication of EP0707437B1 publication Critical patent/EP0707437B1/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/295—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices

Definitions

  • the invention relates to a circuit arrangement for operating one or more Low-pressure discharge lamps according to the preamble of patent claim 1.
  • Such a circuit arrangement is for example in the published patent application DE 43 03 595 described.
  • This circuit arrangement has an inverter with a downstream LC output circuit or resonance circuit into which a compact Fluorescent lamp is integrated.
  • Parallel to the electrode coils Fluorescent lamps are switched reactors that cause excessive current flow due to the electrode coils and thus excessive heating of the lamp electrodes during the electrode preheating phase and excessive damping of the Prevent the resonance circuit in the ignition and operating phase.
  • Those in the above Disclosure published circuit arrangement works even with defective Lamp electrodes, e.g. B. with broken electrode coils because of the resonant circuit is not interrupted by the defective lamp electrodes. This operating state is undesirable for safety reasons, since it can overheat Parts of the lamp and the destruction of the control gear.
  • the circuit arrangement according to the invention contains an inverter and a control device for the inverter and at least one high-impedance DC path, the control device of the inverter with an electrical voltage source connects and in which the electrodes of the low-pressure discharge lamp to be operated or low-pressure discharge lamps are integrated.
  • the control device starts the inverter for the first time.
  • the usual Lamp electrodes designed as coils are in the high-resistance DC path integrated that this in the event of a defective lamp electrode is interrupted. This measure prevents the Supply voltage of the inverter swings when one of the lamp electrodes is broken.
  • the implementation of this high-resistance direct current path only requires few additional components, so that the entire circuit arrangement even in the socket a compact fluorescent lamp can be accommodated.
  • inverters To operate low-pressure discharge lamps on mains voltage are used as inverters usually inverters, in particular half-bridge inverters, with one or several LC output circuits connected in parallel, into which the low-pressure discharge lamp or low-pressure discharge lamps are integrated. Owns the inverter has only one LC output circuit, in which only one or more in Series connected low-pressure discharge lamps are integrated, so the circuit arrangement advantageously only a high-impedance DC path on the the positive pole of a DC voltage source with the control device of the inverter connects and also the electrode coils connected in series contains all low pressure discharge lamps. Occurs at one of the lamp electrodes If the coil breaks, the high-resistance DC path is interrupted and that Swinging of the inverter when the supply voltage is switched on again prevented for the circuit arrangement.
  • each of the high-impedance DC paths contains a series connection of the lamp electrodes integrated in the associated LC output circuit Low-pressure discharge lamp or low-pressure discharge lamps.
  • the high impedance DC current paths are here, starting from the positive pole of a DC voltage source, led to the input of an AND gate, the output of which in turn the control device of the inverter is connected. In this way it is ensured that if one of the DC paths, e.g. B. causes due to a defective lamp electrode, the inverter when switched on again the supply voltage for the circuit arrangement does not oscillate.
  • FIG. 1 illustrates the principle of the circuit arrangement according to the invention based on a first embodiment.
  • the circuit according to FIG. 1 has one consisting of two transistors T10, T11, fed by a DC voltage source Half-bridge inverter with a control device ST1.
  • T11 To the Center tap M1 of the half-bridge inverter T10, T11 is a resonant circuit C11, L1 trained LC output circuit connected.
  • the resonant circuit contains a resonance inductor L1 connected to the center tap M1 and a resonance capacitor C11 connected to the resonance inductance L1 and to the positive pole of the DC voltage source is connected.
  • a coupling capacitor C10 on the one hand with the negative pole the DC voltage source and on the other hand via a tap A1 and an ohmic Resistor is also connected to the positive pole of the DC voltage source.
  • the Low-pressure discharge lamp LP1 to be operated is between the taps A1 and the tap A2, which is between the resonance inductor L1 and the resonance capacitor C11 is integrated in the circuit.
  • the electrodes E10, E11 of the low-pressure discharge lamp LP1 are as coils with two electrical connections each educated.
  • the first connection of the electrode coils E10, E11 is with connected to tap A1 or to tap A2, while the second connection both electrode coils E10, E11 each to a connection of the ignition capacitor C12 and the ohmic resistor R11 are guided, so that both the ignition capacitor C12 and the resistor R11 parallel to the discharge path of the Low pressure discharge lamp LP1 are switched.
  • the circuit arrangement has an ohmic resistor R12, which is connected to the control device ST1 and via a tap A3 with the resonance inductance L1 and the center tap M1 is connected.
  • T11 starts to oscillate on the ignition capacitor C12 by means of resonance increase for the ignition of the low-pressure discharge lamp LP1 required ignition voltage provided and the lamp ignited without preheating the lamp electrodes.
  • Flows during operation a high frequency between taps M1 and A1 over the discharge path of the lamp AC, d. i.e. with a frequency in the range from approx. 20 KHz to approx. 200 kHz.
  • the resonant circuit L1, C11 also provides a missing one Lamp LP1 is a closed circuit, in particular the lamp electrodes not integrated in the resonance circuit.
  • the half-bridge inverter could can also be operated if the lamp LP1 is missing or defective.
  • FIG. 2 shows the application of the invention to two low-pressure discharge lamps connected in series LP20, LP21 according to a second embodiment.
  • the circuit arrangement shown in FIG. 2 has one of two field effect transistors T20, T21 existing, powered by a DC voltage source Half-bridge inverter, which is clocked by a control device ST2 becomes.
  • There is an LC output circuit at the center tap M2 of the inverter T20, T21 connected, via the coupling capacitor C20, the resonance inductance L20, the electrode filament E23 of the low-pressure discharge lamp LP21 Resonance capacitor C21 and the electrode coil E20 of the low-pressure discharge lamp LP20 is led to the positive pole of the DC voltage source.
  • the circuit arrangement has the DC path according to the invention, which the Positive pole of the DC voltage source via the electrode coil E20 of the low-pressure discharge lamp LP20, the resistors R21 and R22, the electrode coil E21 of the low pressure discharge lamp LP20, which is inductive to the resonance inductance L20 coupled secondary winding L21, the electrode coil E22 of the low-pressure discharge lamp LP21, the resistors R23 and R24, the electrode coil E23 of the low pressure discharge lamp LP21, the resonance inductance L20 and above connects the resistor R20 to the input of the control device ST2.
  • the circuit arrangement has a capacitor C23 which, on the one hand, has the negative pole of the DC voltage source and on the other hand with the resonance inductance and is connected to a connection of the electrode coil E23, and one Heating capacitor C22, which together with the electrode filaments E21, E22 and Secondary winding L21 forms a closed circuit and preheats it two lamp electrodes E21, E22 by means of a high-frequency, in the secondary winding L21 induced AC current allows.
  • FIG. 3 illustrates the principle of the invention for two low-pressure discharge lamps connected in parallel LP30, LP31 according to a third embodiment.
  • the circuit arrangement shown in FIG. 3 has one of two field effect transistors T30, T31 existing half-bridge inverters powered by a DC voltage source, which is controlled by a control device ST3.
  • T30 At the center tap M3 of the inverter T30, T31 there are two connected in parallel LC output circuits for one LP30, LP31 low-pressure discharge lamp each.
  • the first LC output circuit contains the coupling capacitor C30 that Resonance inductance L30 and the parallel acting resonance capacitors C32, C33.
  • the low pressure discharge lamp LP30 is parallel to the resonance capacitors C32, C33 arranged.
  • the second LC output circuit comprises the coupling capacitor C31, the resonance inductor L31 and the resonance capacitors acting in parallel C34, C35.
  • the second low-pressure discharge lamp LP31 is parallel arranged to the resonance capacitors C34, C35.
  • the in Figure 3 circuit arrangement shown an AND gate U, the output with is connected to the input of the control device ST3 and two high-resistance DC paths leading from the positive pole of the DC voltage source to one Input of the AND gate U are performed.
  • the E30 electrode filaments which are parallel to the discharge path of the low-pressure discharge lamp LP30 switched resistors R34 and R35, the electrode coil E31, the resonance inductor L30 and the resistor R30, which with the Tap A4 between the resonance inductor L30 and the coupling capacitor C30 is connected, integrated in series.
  • the E32 electrode filaments which are parallel to the discharge path of the low-pressure discharge lamp LP31 arranged resistors R36 and R37, the electrode coil E33, the resonance inductor L31 and the resistor R32, which with the Tap A5 between the resonance inductor L31 and the coupling capacitor C31 is connected, integrated in series.
  • the circuit arrangement has two further resistors R31, R33, which between the resistor R30 and AND gate located tap A6, or between the resistor R32 and the tap A7 arranged with the AND gate with the negative pole of the DC voltage source connect.
  • the circuit arrangement shown represents the two DC paths connected in parallel a direct current connection between the positive pole of the via the AND gate DC voltage source and the control device ST3 of the inverter T30, T31 and thereby enable the inverters T30, T31 and then the lamp operation. But if one of the two DC paths is interrupted, caused, for example, by the occurrence of a spiral break in one of the in this direct current path serially integrated lamp electrodes E30, E31 or E32, E33, this will cause an oscillation when the supply voltage is switched on again of the inverter T30, T31 because the DC connection between the positive pole of the DC voltage source and the control device ST3 is also interrupted.
  • the fourth embodiment of the invention shown in FIG. 4 shows the Application of the invention to a free-swinging, current-feedback inverter Q40, Q41 for operating a LP4 low-pressure discharge lamp with filaments trained, preheated lamp electrodes E40, E41.
  • This circuit arrangement has two, connected as half-bridge inverters, one DC voltage-fed bipolar transistors Q40, Q41.
  • an LC output circuit is connected, the primary winding RK4a of a toroidal transformer RK4, a resonance inductance L4 and a resonance capacitor C42, one of which is connected to is connected to the positive pole of the DC voltage source.
  • the circuit arrangement 4 also has two coupling capacitors connected in series C40, C41 with a center tap A8.
  • the coupling capacitor C40 is over the Collector of the bipolar transistor Q40 connected to the positive pole of the DC voltage source, while the other coupling capacitor C41 through the emitter of the second Bipolar transistor Q41 connected to the negative pole of the DC voltage source is.
  • the low pressure discharge lamp LP4 is between the center tap A8 and the Tap A9, which is in the LC output circuit between the resonance inductor L4 and the Resonance capacitor C42 is integrated in the circuit arrangement.
  • Parallel to Discharge path of the low-pressure discharge lamp LP4 are in a first parallel circuit a heating or ignition capacitor C44, C45 arranged and in a second Parallel circuit a series connection of an ohmic resistor R43 and a PTC thermistor.
  • the two ignition capacitors C44, C45 and the resistance elements R43, KL4 have center taps V1, V2 that are connected to each other.
  • the control device for the half-bridge inverter essentially consists from the toroidal transformer RK4, whose primary winding RK4a in the LC output circuit is arranged while a secondary winding RK4b or RK4c together with a base series resistor R40 or R41 in the base circuit of the bipolar transistors Q40 or Q41 is switched.
  • the control device a starting device, which essentially consists of a diac DC4, a Capacitor C43 and a diode D4.
  • the circuit arrangement has of the fourth embodiment a high-resistance direct current path, the the half-bridge inverter Q40, Q41 starts to swing in the event of a defective one Lamp electrode E40, E41 prevented.
  • This DC path contains outgoing from the positive pole of the DC voltage source, an ohmic resistor R44, the capacitor C43, the center tap M4, the primary winding RK4a, the resonance inductance L4, the electrode coil E40, the ohmic resistor R43, the PTC thermistor KL4, the electrode coil E41, the center tap A8 and an ohmic resistor R42, which is arranged in parallel with the coupling capacitor C41 and connected to the The negative pole of the DC voltage source is connected. All of the above components of the high-resistance direct current paths are connected in series in direct current.
  • the Capacitor C43 is charged so that the diac DC4 trigger pulses to the base of the Bipolar transistor Q40 gives and thus the oscillation of the half-bridge inverter Q40, Q41 triggers.
  • the inverter Q40, Q41 has started up the capacitor C43 is so far discharged via the diode D4 that the diac DC4 no further trigger pulses generated for the base of transistor Q40.
  • the invention high-resistance DC path interrupted in the event of defective lamp LP4. This will when the circuit arrangement is switched on again, the capacitor C43 is not charged and thus the diac DC4 cannot trigger pulses for transistor Q40 generate so that the half-bridge inverter Q40, Q41 starts to oscillate defective lamp LP4 is prevented.
  • FIG. 5 shows a fifth embodiment of the circuit arrangement according to the invention.
  • This circuit has a free-swinging, current feedback, from a half-bridge inverter Q50, Q51 fed by a DC voltage source Operation of a cold start, d. H. without preheating the lamp electrodes E50, E51 lighting low pressure discharge lamp LP5.
  • Q51 formed half-bridge inverter is an LC output circuit connected, starting from the center tap M4 via the primary winding RK5a of a toroidal transformer, a coupling capacitor C50, a Resonance inductance L5 and a resonance capacitor C51 to the collector of the transistor Q50 or to the positive pole of the DC voltage source.
  • the control device for the Half-bridge inverters Q50, Q51 essentially consist of a toroidal transformer RK5, whose primary winding RK5a is connected to the LC output circuit is, and the secondary windings RK5b and RK5c each in a base circle the switching transistors Q50 and Q51 are integrated, as well as one capacitor each C53, C54 and a rectifier diode D50, D51, arranged in parallel to it which are also integrated in the base circuit of one of the transistors Q50, Q51.
  • the circuit arrangement has a high-impedance direct current path, the the base of the bipolar transistor Q51 in direct current with the positive pole of the direct voltage source connects.
  • This high impedance DC path includes, starting from from the positive pole of the DC voltage source, the first lamp electrode designed as a filament E50, the ohmic resistance element R50, the second one designed as a spiral Lamp electrode E51, the resonance inductance L5 and an ohmic resistor R51 connected to one between the coupling capacitor C50 and the resonance inductor L5 branching point in the LC output circuit and with the base of transistor Q51.
  • the base of the first transistor Q50 is via an ohmic resistor R52 also with the positive pole connected to the DC voltage source.
  • Figure 6 shows a sixth embodiment of the circuit arrangement according to the invention for operating a compact fluorescent lamp with an electrical power consumption of approx. 23 W on an AC voltage of 120 V and 60 Hz.
  • This circuit arrangement has a freely oscillating, current-feedback, Half-bridge inverters T60, T61 powered by a DC voltage source.
  • the DC voltage source is an electrolytic capacitor C60, which is connected upstream Rectifier GL, a radio interference filter F and a fuse SI with a mains voltage source is connected.
  • T61 formed half-bridge inverter is an LC output circuit connected, starting from the center tap M6 via the resonance inductance L6a and the resonance capacitor C61 to drain the MOSFET transistor T60 is guided.
  • the coupling capacitor C64 and the fluorescent lamp LP6 are arranged.
  • An ohmic resistor R61 is connected in parallel with the coupling capacitor C64.
  • a heating or Ignition capacitor C62 or C63 arranged in a first parallel circuit to the fluorescent lamp LP6, a heating or Ignition capacitor C62 or C63 arranged.
  • a second parallel circuit to the fluorescent lamp LP6 contains a high-ohmic resistance R60 and one PTC thermistor KL6. The center taps V3, V4 between the capacitors C62, C63 and are connected to one another between the resistance elements R60, KL6.
  • the control device for the inverter T60, T61 essentially consists of two secondary windings L6b and L6c, which are inductive to the resonance inductance L6a are coupled and each with the gate electrode of a transistor T60 or T61 are connected, as well as one upstream of the gate electrode Low pass filter R63, C65 or R64, C66.
  • the control device a starting device on the diac DC6, the capacitor C67 and the diode D6 includes. It corresponds to the starting device in terms of its connection and mode of operation of the fourth embodiment.
  • a high-impedance direct current path starting from from the positive pole of the electrolytic capacitor C60, the first lamp electrode designed as a filament E60 of the compact fluorescent lamp LP6, the resistor R60, the PTC thermistor KL6, the second lamp electrode E61 designed as a filament, the resistor R61, the resonance inductor L6 and an ohmic resistor R62 contains, which is connected to a first terminal of the capacitor C67, while the other connection of the capacitor C67 to the negative pole of the electrolytic capacitor C60 is led.
  • the inverter T60, T61 fed from the electrolytic capacitor C60 with the rectified mains voltage.
  • the starting capacitor is connected via the high-impedance direct current path mentioned above C67 is charged so that the diac DC6 trigger pulses to the gate of the transistor T61 gives and thus the start of the half-bridge inverter T60, T61 triggers.
  • the starting capacitor C67 Discharged so far via the diode D6 that no further trigger pulses from the diac DC6 be generated.
  • the inverter T60, T61 acts on the LC output circuit as well as the fluorescent lamp LP6 and the parallel circles to the fluorescent lamp LP6 a high-frequency AC voltage (between approx. 20 KHz and 200 KHz).
  • this direct current is approximately two powers of ten smaller than that of the Inverters generate alternating current so that there is no interference with lamp operation can be expected from this direct current.
  • the high-resistance DC path described above is interrupted, since the electrode coils E60, E61 are serially integrated in this direct current path are so that when the power supply is switched on again, the starting capacitor C67 not charged and therefore no trigger pulses from diac DC6 for the gate of the transistor T61 are generated. This causes the half-bridge inverter to start up T60, T61 prevented with a defective lamp electrode E60, E61.
  • the invention is not limited to the exemplary embodiments described in more detail above.
  • the DC path according to the invention can also be used in circuit arrangements with other inverters, e.g. B. in full bridge inverters.

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Claims (7)

  1. Montage pour faire fonctionner une ou plusieurs lampes à décharge à basse tension, le montage comportant un inverseur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) et un dispositif (ST1 ; ST2 ; ST3 ; RK4 ; RK5 ; L6) de commande pour l'inverseur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61),
       caractérisé en ce que le montage comporte au moins une voie de courant continu à haute impédance qui relie le dispositif (ST1 ; ST2 ; ST3 ; RK4 ; RK5 ; L6) de commande de l'inverseur (T10, T11 ; T20, T21 ; T30, T3 ; Q40, Q41 ; Q50, Q51 ; T60, T61) à une source de tension et auquel sont intégrées les électrodes (E10, E11 ; E20, E21, E22, E23 ; E30, E31, E32, E33; E40, E41 ; E50, E51 ; E60, E61) de la lampe (LP1 ; LP4 ; LP5; LP6) à décharge à basse pression ou de lampes (LP20, LP21 ; LP30, LP31) à décharge à basse pression, cette voie de courant continu à haute impédance ou les voies de courant continu à haute impédance étant interrompues dans le cas d'une électrode (E10, E11 ; E20, E21, E22, E23 ; E30, E31, E32, E33 ; E40, E41 ; E50, E51 ; E60, E61) de lampe défectueuse et le signal de commande étant ainsi extrait de l'inverseur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) lors du branchement renouvelé de l'alimentation en tension.
  2. Montage suivant la revendication 1, caractérisé en ce que
    l'inverseur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) est un onduleur,
    il est raccordé à l'onduleur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) au moins un circuit de sortie LC auquel est intégrée la lampe (LP1 ; LP4 ; LP5 ; LP6) à décharge à basse tension ou auquel sont intégrées les lampes (LP20, LP21 ; LP30, LP31) à décharge à basse tension,
    les électrodes (E10, E11 ; E20, E21, E22, E23 ; E30, E31, E32, E33 ; E40, E41 ; E50, E51 ; E60, E61) de la lampe (LP1 ; LP4 ; LP5 ; LP6) à décharge à basse tension ou les lampes (LP20, LP21 ; LP30, LP31) à décharge à basse tension étant réalisées en filaments,
    les filaments boudinés (E10, E11 ; E20, E21, E22, E23 ; E30, E31, E32, E33 ; E40, E41 ; E50, E51 ; E60, E61) d'électrodes étant intégrés en série à la voie de courant à haute impédance ou aux voies de courant à haute impédance,
    la voie de courant à haute impédance ou les voies de courant à haute impédance relient (NT) le dispositif (ST1 ; ST2 ; ST3 ; RK4 ; RK5; L6) de commande de l'onduleur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) à une source de tension.
  3. Montage suivant l'une des revendications 1 et 2, caractérisé en ce que
    l'onduleur (T20, T21) comporte un circuit de sortie LC ayant au moins deux lampes (LP20, LP21) à décharge à basse pression branchées en série,
    les filaments (E20, E21, E22, E23) d'électrodes des lampes (LP20, LP21) à décharge à basse pression branchées en série étant intégrés en série à une voie de courant continu à haute impédance,
       la voie de courant à haute impédance reliant le dispositif (ST2) de commande de l'onduleur (T20, T21) à une source de tension.
  4. Montage suivant l'une des revendications 1 et 2, caractérisé en ce que
    en ce qu'il est raccordé à l'onduleur (T30, T31) plusieurs circuits de sortie LC branchés en parallèle les uns aux autres,
    chaque circuit de sortie LC comporte au moins une lampe (LP30, LP31) à décharge à basse pression,
    il est prévu pour chaque circuit de sortie LC une voie de courant continu à laquelle sont intégrés en série les filaments (E30, E31, E32, E33) d'électrode de la lampe (LP30, LP31) à décharge à basse pression ou des lampes à décharge à basse pression faisant partie du circuit de sortie LC correspondant,
    les voies de courant continu à haute impédance sont reliées à l'entrée d'une porte (U) ET et à une source de tension,
    la sortie de la porte (U) ET est reliée au dispositif (ST3) de commande de l'onduleur (T30, T31).
  5. Montage suivant la revendication 2, caractérisé en ce que l'onduleur (T10, T11 ; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) est un onduleur en demi-pont.
  6. Montage suivant la revendication 2, caractérisé en ce que l'onduleur (T10, T11; T20, T21 ; T30, T31 ; Q40, Q41 ; Q50, Q51 ; T60, T61) est un onduleur à oscillation libre, rétrocouplé en courant.
  7. Montage suivant la revendication 2, caractérisé en ce que l'onduleur (T10, T11 ; T20, T21; T30, T31) est un onduleur commandé de l'extérieur.
EP95115565A 1994-10-12 1995-10-02 Circuit pour alimenter une ou plusieurs lampes à décharge Expired - Lifetime EP0707437B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436463A DE4436463A1 (de) 1994-10-12 1994-10-12 Schaltungsanordnung zum Betrieb einer oder mehrerer Niederdruckentladungslampen
DE4436463 1994-10-12

Publications (3)

Publication Number Publication Date
EP0707437A2 EP0707437A2 (fr) 1996-04-17
EP0707437A3 EP0707437A3 (fr) 1997-12-03
EP0707437B1 true EP0707437B1 (fr) 2001-07-18

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EP95115565A Expired - Lifetime EP0707437B1 (fr) 1994-10-12 1995-10-02 Circuit pour alimenter une ou plusieurs lampes à décharge

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EP (1) EP0707437B1 (fr)
JP (1) JPH08213178A (fr)
KR (1) KR100334378B1 (fr)
CA (1) CA2160309C (fr)
DE (2) DE4436463A1 (fr)

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DE19819671B4 (de) * 1998-05-02 2008-04-10 Insta Elektro Gmbh Schaltungsanordnung zum Schutz von Leuchtstofflampen und elektronischem Vorschaltgerät
DE19916080C2 (de) * 1999-04-09 2001-11-22 Vossloh Schwabe Elektronik Vorschaltgerät mit Fehlererkennung
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KR100334378B1 (ko) 2002-10-31
KR960016646A (ko) 1996-05-22
CA2160309C (fr) 2004-12-07
DE59509422D1 (de) 2001-08-23
JPH08213178A (ja) 1996-08-20
DE4436463A1 (de) 1996-04-18
EP0707437A3 (fr) 1997-12-03
CA2160309A1 (fr) 1996-04-13
EP0707437A2 (fr) 1996-04-17

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