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EP1860925B1 - Appareil de montage de lampe électronique à connexion à chaud - Google Patents

Appareil de montage de lampe électronique à connexion à chaud Download PDF

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Publication number
EP1860925B1
EP1860925B1 EP07108475A EP07108475A EP1860925B1 EP 1860925 B1 EP1860925 B1 EP 1860925B1 EP 07108475 A EP07108475 A EP 07108475A EP 07108475 A EP07108475 A EP 07108475A EP 1860925 B1 EP1860925 B1 EP 1860925B1
Authority
EP
European Patent Office
Prior art keywords
heating
lamp
circuit
power
voltage
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.)
Not-in-force
Application number
EP07108475A
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German (de)
English (en)
Other versions
EP1860925A1 (fr
Inventor
Frank Lochmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridonicatco GmbH and Co KG
Original Assignee
Tridonicatco GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tridonicatco GmbH and Co KG filed Critical Tridonicatco GmbH and Co KG
Publication of EP1860925A1 publication Critical patent/EP1860925A1/fr
Application granted granted Critical
Publication of EP1860925B1 publication Critical patent/EP1860925B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to an electronic ballast (EBG) for operating one or more fluorescent lamps, which has an integrated heating circuit for heating coil electrodes of at least one fluorescent lamp connected to the ECG.
  • ECG electronic ballast
  • An electronic lamp ballast for fluorescent lamps with heatable filament electrodes is, for example, in EP 1 176 851 A1 described.
  • a heating transformer with core which emits energy on the secondary side of the filament electrodes and the primary side draws its energy from the AC voltage provided by an inverter half-bridge circuit.
  • DE 295 14 817 U1 discloses an electronic lamp ballast, which is suitable for operating at least one low-pressure discharge lamp.
  • the electronic ballast described herein has a heating transformer which is supplied with alternating voltage on the primary side via an inverter half-bridge circuit and is connected on the secondary side to the filament electrodes of a low-pressure discharge lamp connected to the electronic ballast.
  • the duty cycle of the rectangular current flowing through the primary winding of the heating transformer and provided by the inverter half-bridge circuit is modulated by a power transistor connected in series with the primary winding and controlled by a pulse width modulator, the frequency of the control signal provided for this purpose by the pulse width modulator is much lower than the frequency of the AC voltage at the output of the inverter.
  • EP 0 748 146 A1 refers to a circuit arrangement comprising an electronic lamp ballast for preheating the filament electrodes of at least one AC-driven fluorescent lamp connected to the ECG. At the output of serving to power the lamp inverter half-bridge while a primary winding of a heating transformer and connected to the primary winding in series controllable semiconductor power switch comprehensive heating circuit is connected, which required for preheating the filaments heating energy through two separate secondary windings of the heating transformer in two transmits independent load circuits in which the respective helical electrodes are located.
  • the heating circuit comprises a primary side connected to the output of an inverter half-bridge circuit heating transformer with two separate secondary windings, which is used to transfer a required for preheating the coil electrodes, provided by the inverter half-bridge heating energy in two independent load circuits in which the individual coil electrodes are located ,
  • DE 10 2004 009 995 A1 describes an electronic lamp ballast for AC operation of a fluorescent lamp having an inverter half bridge connected on the input side to a DC voltage source, a load circuit connected to the inverter half bridge, in which the lamp filaments are located, and a serving for heating the lamp filament heating transformer comprises, consisting of a primary winding and two inductively coupled to the primary winding secondary windings, which are each connected in series with the two lamp filaments.
  • the supplied via the inverter with AC primary winding of the heating transformer is arranged in an intermediate circuit having an adjustable impedance. In dimming operation, the heating power transferred to the lamp filaments is adjusted by changing the impedance of this intermediate circuit.
  • the circuit arrangement described herein comprises a heating circuit comprising a heating transformer with two separate secondary windings, by means of which the two filament electrodes of the lamp are supplied with heating energy independently of each other, and a first semiconductor power switch controlled by a timing element and connected in series with the primary winding of the heating transformer. can be switched with the between two tapping points serving to provide the heating secondary winding of a primary side to the output of a self-excited push-pull sine converter inductively coupled power transformer.
  • the present invention is dedicated to providing an adaptable heating circuit.
  • a circuit provided for heating filament electrodes of fluorescent lamps according to claim 1 which has a heating transformer whose secondary side is connected to at least one filament electrode and which has a magnetically coupled to this secondary side, supplied with voltage primary side.
  • the primary side is designed to provide different heating powers transmitted by the heating transformer.
  • the heating circuit can thus also be adapted during operation to different conditions with regard to the operating state, the dimming state, applied input voltages and / or different lamp types.
  • a plurality of magnetically coupled coils can be provided on the primary side, which can be activated alternatively or in combination.
  • An embodiment in the form of an autotransformer is possible.
  • the present invention relates to a circuit provided for heating filament electrodes of fluorescent lamps, comprising a heating transformer whose secondary side is connected to at least one filament electrode and a primary side which is magnetically coupled to this secondary side and supplied with voltage having.
  • a plurality of magnetically coupled coils are provided on the primary side, which can be activated alternatively or in combination to provide different heating powers.
  • the primary side of the heating transformer is in this case supplied via the midpoint of an inverter half-bridge circuit with an AC voltage for operating a lamp connected to the circuit.
  • the present invention further relates to an operating device for fluorescent lamps, which has a circuit according to one of the two alternatives described above.
  • the operating device may include a control circuit which adjusts the heat output transferred to the helical electrodes depending on the operating and / or dimming state of a connected lamp.
  • the operating device may also have a control circuit which adjusts the heating power depending on the type of a connected lamp and / or adjusts depending on the detection of a parameter representing the operating temperature of the helical electrodes.
  • the operating device can also be designed to dim one or more fluorescent lamps connected to an output terminal of the operating device.
  • the invention relates to a method for heating filament electrodes of fluorescent lamps by means of a heating transformer whose secondary side is connected to at least one coil electrode and which has a magnetically coupled to this secondary side, supplied with voltage primary side.
  • the method comprises the step of adjusting one of a plurality of heating power stages by selective activation of the primary side of the heating transformer on.
  • the present invention is directed to a method of heating filament electrodes of fluorescent lamps by means of a heating transformer whose secondary side is connected to at least one filament electrode and which has a primed primary side magnetically coupled to this secondary side.
  • the method comprises the step of adjusting one of a plurality of heating power stages by selectively activating one or more magnetically coupled coils forming the primary side of the heating transformer.
  • a parameter is detected, which reflects the spiral temperature. If the spiral temperature is still insufficient, a higher heat output level is selected according to the invention.
  • the current Schutschinseck may also be selected depending on the operating condition and / or the dimming state of the lamp connected to the aforementioned circuit or depending on the type of the connected lamp.
  • the present invention also relates to an electronic control unit designed to support one of the methods described above.
  • Fig. 1 is a schematic diagram of an electronic lamp ballast for operating a fluorescent lamp LA shown, which has a heating circuit for at least one of the two lamp filaments W 1 and W 2 .
  • the heating circuit in this case has a heating transformer HzTr 'whose secondary side L s 1' , L s 2 ' , with at least one helical electrode W 1 , W 2 is connected.
  • the heating transformer further has a secondary side L s 1 ', L s 2 ' magnetically coupled primary side ( Lp 1 ' , Lp 2' ) on.
  • the heating circuit can also have a heating current control circuit HRK.
  • the setting of the heating power transmitted by the heating transformer may, for example, in dependence on a manipulated variable StG, which is supplied by a data output Data OUT a digital control and regulating device (R & S module).
  • the control and regulating device is supplied via a data input Data IN 1 with a measured value of a controlled variable RG (actual value) tapped via a load circuit of the electronic lamp ballast, in which one of the two lamp filaments W 1 and W 2 is located.
  • a controlled variable RG actual value
  • This measured value may be, for example, a voltage U M which is proportional to the filament current I W2 flowing through one of the two lamp filaments (W 2 ) and thus a statement about the temperature-dependent effective resistance R W 2 ( ⁇ W 2 ) relevant lamp filament W 2 and the operating temperature ⁇ W 2 supplies.
  • the control and regulating device controls the manipulated variable StG in this case as a function of the measured value of the controlled variable RG present at the data input Data IN 1 and a command variable FG (setpoint value) for the heating power to be transmitted in heating operation to at least one of the two lamp filaments W 1 and W 2 P H 1 or P H 2 .
  • Fig. 2a is a circuit realization of an electronic lamp ballast for AC operation of a fluorescent lamp LA after a first Embodiment of the present invention shown, which is a heating circuit with a Schustromregelnik HRK as described above with reference to Fig. 1 contains described.
  • This in Fig. 2 sketched electronic lamp ballast thereby has an inverter half-bridge circuit DC / AC, consisting of two mutually connected in series, driven alternately with a fixed or adjustable frequency semiconductor power switches T 1 and T 2 , which serves for supplying voltage to the lamp LA AC voltage U WR provides.
  • the frequency of this AC voltage can be controlled to adjust the lamp power.
  • the inverter half-bridge DC / AC is supplied via a storage capacitor C 1 with an AC line voltage U e 1 smoothed by a radio interference suppression filter TPF and power rectifier AC / DC and rectified as an intermediate circuit voltage U c 1 .
  • the output port of the inverter half-bridge DC / AC formed from the connection node between the two controllable semiconductor power switches T 1 and T 2 and the ground node of the electronic ballast is connected via a series resonant circuit consisting of a resonance inductor L and a resonance capacitor C 2 and via an (optional) coupling capacitor C 3 for decoupling the DC voltage component of the lamp LA supplied supply voltage U WR connected, via which the individual coils W 1 and W 2 of the gas discharge charge lamp LA are supplied with heating energy.
  • the intermediate circuit voltage U C 1 is in this case by an alternately performed switching on and off of the two semiconductor power switches T 1 and T 2 of the inverter half-bridge DC / AC in a high-frequency Converted AC voltage that is output from the inverter to the series resonant circuit.
  • At least one of the two lamp filaments W 1 and W 2 is preheated or additionally heated before and / or after the ignition of the lamp to a specific predeterminable operating temperature.
  • the in Fig. 2a illustrated electronic lamp ballast via one or as shown two separate heating circuits HzK 1 and HzK 2 , via which the two helical electrodes W 1 and W 2 are heated to a desired operating temperature ⁇ W.
  • a primary side in the two respective heating circuits HzK 1 or 2 Hz integrated and fed via a further (optional) coupling capacitor C 4 with the inverter output voltage U WR heating transformer HzTr with a secondary winding or two galvanically separated secondary windings L s 1 and L s 2 serves to Provision of the heating energy required in preheating by inductive coupling.
  • the secondary side is connected to the helical electrodes.
  • the primary side of this heating transformer according to the invention consists of at least two, for example. Via a common ferrite magnetically coupled primary windings L p 1 and L p 2 , which are activated alternatively or additively. Depending on the activation, different heating power levels can thus be selected.
  • One of the primary windings L p 1 is, for example, selectively connectable to the other primary winding via a controllable semiconductor power switch T 3 connected in series with a diode D 3 acting as a half-wave rectifier.
  • the circuit breaker may be, for example, one of act a Schustromregelungs Rhein of the R & S module controlled field effect transistor, which can be switched by a corresponding control of its gate electrode in a low-resistance state (switching mode), whereupon the relevant primary winding L p 1 is switched on.
  • the heating operation is preferably started, in particular during preheating with low heating power, and the heating power is increased when a measured value representing the coil temperature indicates an insufficient coil temperature.
  • the semiconductor power switch T 3 is operated in a high-resistance state (blocking operation). The result is that only the power supplied via the primary winding Lp heating power P 2 H2 to the two filament electrodes W 1 and W 2 is transmitted.
  • the relevant primary winding L p 1 of the heating transformer HzTr is switched on via the forward-biased semiconductor power switch T 3 (or switched over to this primary winding L p 1 , if it transmits a higher heating power).
  • the heating power P H 2 supplied to the helical electrodes W 1 and W 2 is increased by the amount of power P H 1 transmittable via this primary winding, or the higher heating power of the other primary winding is transmitted.
  • the traversed by a part of the helical current I W2 measuring resistor R M is connected at one end to the helical electrode W 2 and at another end to the ground node.
  • a to the measuring resistor R 2 connected in parallel with series circuit of two oppositely poled Zener diodes D 1 and D 2 serves to limit the voltage dropping across the measuring resistor R 2 measurement voltage U M.
  • Fig. 2b is an electronic lamp ballast for AC operation of a fluorescent lamp according to a second embodiment of the present invention, which is opposite to the in Fig. 2a differs in that instead of a heating transformer HzTr with two each via a common ferrite core magnetically coupled, galvanically isolated primary ( L p 1 , L p 2 ) and secondary windings ( L s 1 , L s 2 ) a for the provision of heating energy the coil electrodes W 1 and W 2 of the lamp LA serving power transformer HzTr 'is used, the primary side consists of two parallel to each other connected to the associated secondary side via output taps connected autotransformer windings L p 1 ' and L p 2 ' , respectively a controllable semiconductor power switch T 3 and T 4 are individually or combined switchable.
  • a heating transformer HzTr with two each via a common ferrite core magnetically coupled, galvanically isolated primary ( L p 1 , L p 2 ) and secondary windings ( L
  • the secondary side of the power transformer HzTr 'in consists of two integrated into the two respective load circuits LK 1 and LK 2 , to the lamp filaments W 1 and W 2 in Series connected autotransformer windings L s 1 'and L s 2 ', so that results for each of the two consisting of a pair of primary and a secondary side autotransformer winding part transformer predetermined by the winding ratios of the individual autotransformer windings fixed voltage translation ratio , About a to the aforementioned parallel connection of the two switchable by the semiconductor power switches T 3 and T 4 primary side autotransformer windings L p 1 'and Lp 2 ' of the power transformer HzTr 'in series further semiconductor power switch T 5 , both heating circuits HzK 1 and HzK 2 are interrupted together, whereby the Bankwoodsmakersen the two lamp filaments W 1 and W 2 are turned off at the same time.
  • an adjustable capacitor C 6 or C connected in series to the lamp filaments W 1 and W 2 and the individual secondary-side autotransformer windings L s 1 'and L s 2 ' can be connected 7 may be contained, via which the impedances of the respective load circuits and thus the characteristics of the current flowing through the respective lamp filaments helix currents I W 1 and I W 2 can be changed.
  • a current-time diagram is shown, which is the temporal course of the current flowing through helical electrode W 1 preheat current I H 1 in forward mode or in blocking operation of the one of the two primary-side windings L p 1 and L p 2 of the heating transformer used HzTr controllable Semiconductor circuit breaker T 3 shows.
  • the winding ratios ü 1 : 1 and ü 2 : 1 of the transformer windings can be set so that when switching through T 3 after the transient has subsided a preheating I H 1 sets, the peak value, for example, is almost twice as large Peak value of the pre-heating current I H 1 occurring in the blocking operation of T 3 .
  • Fig. 4 shows another embodiment of the present invention, in which a tap (center tap) is provided between the two ends of the inductance forming the primary side.
  • a tap center tap
  • the detection of the spiral temperature can indirectly, for example, on the primary side, namely on the in FIG. 4 apparent resistance R mp done.
  • Fig. 5 shows a further embodiment of the present invention, in which two primary windings Lph1, Lph2 are connected in series with each other.
  • the in Fig. 5 shown heating transformer consists of two primary-side windings Lph1, Lph2 and two secondary windings Lh1, Lh2 coupled thereto.
  • the two secondary-side windings Lh1, Lh2 of the heating transformer are respectively connected to the heating coil terminals P1, P2 of the one lamp electrode and the heating coil terminals P3, P4 of the second lamp electrode.
  • a controllable heating switch S2opt is connected to a terminal of a primary-side winding Lph1 and to ground. This results in a series connection of the two primary-side windings Lph1, Lph2 of the heating transformer and the controllable switch S2opt.
  • winding Lph1 is not connected to ground. Accordingly, no heating energy is transmitted to the helical electrodes P1, P2 via the secondary-side winding Lh1 coupled to the primary-side winding Lph1.
  • the switches S1, S2opt are advantageously designed as AC switches, for example as mosfet switches in a rectifier bridge or in conjunction with the decoupling capacitor Cshortopt.
  • the primary-side winding Lph1 of the heating transformer is connected directly to ground, ie the switch S2opt is not provided.
  • This Einschaltertine can therefore provide two levels of performance with appropriate control of the switch S1, namely on both or only one primary winding.
  • further primary windings are connected in series with the already mentioned primary windings Lph1, Lph2 so that selectively more than two or three different power levels can be provided (further switches are necessary in that case).
  • the circuit arrangement according to the invention is integrated together with a spiral detection function in an electronic ballast.
  • the Wendeldetetation is a known function, which can be realized for example via a measuring resistor R M , see for example FIG. 2a ,
  • the thus detected filament current can be included in a control device to regulate according to the transmitted to the lamp heating power. For example, a low value of the filament current will cause more primary windings Lph1, Lph2 to transmit heating power via the switches S1, S2opt.
  • switches S1, S2opt and primary windings Lph1, Lph2 must be provided.
  • two different coil types are arranged with, for example, different coil resistors.
  • an electronic ballast for very low dimming levels can increase the heating power.
  • the primary side according to the invention is designed to selectively provide two and preferably three or more different power levels.
  • the heating power switching is relatively simple, since it can be done by means of the combination of the MOSFET M1 with the diode D1, so that the control can be preferably without driver block directly, for example, by a microcontroller.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (13)

  1. Circuit pour chauffer des électrodes à filament (W1, W2) de lampes à fluorescence (LA),
    présentant un transformateur de chauffage (HzTr), dont le secondaire (Ls1, Ls2) est relié à au moins une électrode à filament (W1 et/ou W2) et qui présente un primaire (Lp1, Lp2) couplé magnétiquement avec ce secondaire (Ls1, Ls2) et alimenté en tension (UWR),
    caractérisé en ce que
    dans le primaire (Lp1, Lp2) sont disposées plusieurs bobines couplées magnétiquement, qui peuvent être activées alternativement ou de façon combinée, pour mettre à disposition différentes puissances de chauffage (PH1, PH2, PH1 + PH2).
  2. Circuit selon la revendication 1,
    dans lequel lesdits plusieurs bobines couplées magnétiquement sont formées par une inductance avec une prise de tension au milieu d'un autotransformateur.
  3. Circuit selon la revendication 1,
    les différentes puissances de chauffage pouvant être mises à disposition via un module à semi-conducteurs du primaire.
  4. Circuit selon l'une des revendications précédentes, l'alimentation en tension du primaire (Lp1, Lp2) s'effectue par le point central d'un circuit demi-pont onduleur (DC/AC), qui met à disposition une tension alternative (U WR) pour faire fonctionner une lampe (LA) raccordée.
  5. Appareil d'alimentation pour lampes à fluorescence, présentant un circuit selon l'une des revendications précédentes,
  6. Appareil d'alimentation selon la revendication 5, présentant un circuit de commande (R&S-Modul), qui ajuste la puissance de chauffage (PH1, PH2, PH1+PH2) en fonction de l'état de fonctionnement et/ou de l'intensité lumineuse d'une lampe (LA) raccordée.
  7. Appareil d'alimentation selon la revendication 5 ou 6,
    présentant un circuit de commande (R&S-Modul), qui ajuste la puissance de chauffage (PH1, PH2, PH1 + PH2) en fonction du type d'une lampe (LA) raccordée.
  8. Appareil d'alimentation selon la revendication 5 ou 6,
    présentant un circuit de commande (R&S-Modul), qui ajuste la puissance de chauffage (PH1, PH2, PH1 + PH2) en fonction de la détection d'un paramètre (I w1, I w2) qui correspond à la température de filament (θW1, θW2), la tension d'entrée appliquée, l'état de fonctionnement et/ou le type de lampe.
  9. Procédé pour chauffer des électrodes à filament (W1, W2) de lampes à fluorescence (LA) avec l'aide d'un transformateur de chauffage (HzTr), dont le secondaire (Ls1, Ls2) est relié à au moins une électrode à filament (W1 et/ou W2) et qui présente un primaire (Lp1, Lp2) couplé magnétiquement avec ce secondaire (Ls1, Ls2) et alimenté en tension (U WR),
    caractérisé par et présentant l'étape d'un ajustement d'un niveau de puissance de chauffage parmi plusieurs (PH1, PH2, PH1+PH2) par activation sélective d'une ou plusieurs bobines couplées magnétiquement, qui forment le primaire (Lp1, Lp2) du transformateur de chauffage (HzTr).
  10. Procédé selon la revendication 9,
    présentant les étapes suivantes :
    - réglage du niveau de puissance de chauffage le plus bas (PH1, PH2),
    - détection d'un paramètre (IW1, IW2), qui représente la température de filament (θW1, θW2), et
    - choix d'un niveau de puissance de chauffage plus haut (PH1+PH2) au cas où la température de filament (θW1, θW2) n'est pas encore suffisante.
  11. Procédé selon l'une des revendications 9 ou 10, le niveau de puissance de chauffage actuel (PH1, PH2, PH1 + PH2) étant choisi en fonction de l'état de fonctionnement, de la hauteur de la tension d'entrée appliquée, du type de lampe et/ou de l'intensité lumineuse de la lampe (LA) raccordée.
  12. Procédé selon l'une des revendications 9 à 11, le niveau de puissance de chauffage actuel (PH1, PH2, PH1 + PH2) étant choisi en fonction du type de la lampe (LA) raccordée.
  13. Unité de commande électronique,
    qui est configurée pour le soutien d'un procédé selon l'une des revendications 9 à 12.
EP07108475A 2006-05-26 2007-05-18 Appareil de montage de lampe électronique à connexion à chaud Not-in-force EP1860925B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006024700A DE102006024700A1 (de) 2006-05-26 2006-05-26 Elektronisches Lampenvorschaltgerät mit Heizschaltung

Publications (2)

Publication Number Publication Date
EP1860925A1 EP1860925A1 (fr) 2007-11-28
EP1860925B1 true EP1860925B1 (fr) 2009-11-18

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Application Number Title Priority Date Filing Date
EP07108475A Not-in-force EP1860925B1 (fr) 2006-05-26 2007-05-18 Appareil de montage de lampe électronique à connexion à chaud

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EP (1) EP1860925B1 (fr)
AT (1) ATE449528T1 (fr)
DE (2) DE102006024700A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009126472A1 (fr) * 2008-04-11 2009-10-15 Osram Sylvania, Inc. Circuit de préchauffage de filament de lampe autonome pour ballast

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625077B4 (de) * 1996-06-22 2005-05-19 Diehl Stiftung & Co. Kg Leuchtstofflampen-Vorschaltgerät
GB2337644B (en) * 1998-05-22 2002-07-17 Mackwell Electronics Ltd Fluorescent Lamps for Emergency Lighting Applications
DE10345610A1 (de) * 2003-09-29 2005-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben mindestens einer Niederdruckentladungslampe
DE102004009995A1 (de) * 2004-03-01 2005-09-22 Tridonicatco Gmbh & Co. Kg Schaltungsanordnung und Verfahren zum Betreiben einer Gasentladungslampe mit einem Heiztransformator

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Publication number Publication date
DE102006024700A1 (de) 2007-11-29
ATE449528T1 (de) 2009-12-15
EP1860925A1 (fr) 2007-11-28
DE502007002005D1 (de) 2009-12-31

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