EP1860925A1 - 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
EP1860925A1
EP1860925A1 EP07108475A EP07108475A EP1860925A1 EP 1860925 A1 EP1860925 A1 EP 1860925A1 EP 07108475 A EP07108475 A EP 07108475A EP 07108475 A EP07108475 A EP 07108475A EP 1860925 A1 EP1860925 A1 EP 1860925A1
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EP
European Patent Office
Prior art keywords
heating
lamp
circuit
primary side
voltage
Prior art date
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Granted
Application number
EP07108475A
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German (de)
English (en)
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EP1860925B1 (fr
Inventor
Frank Lochmann
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Tridonicatco GmbH and Co KG
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Tridonicatco GmbH and Co KG
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Publication of EP1860925A1 publication Critical patent/EP1860925A1/fr
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Publication of EP1860925B1 publication Critical patent/EP1860925B1/fr
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    • 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 is 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, which includes a heating circuit with a Schustromregelnik HRK as described above with reference to FIG. 1.
  • the sketched in Fig. 2 electronic lamp ballast has an inverter half-bridge circuit DC / AC, consisting of two mutually connected in series, alternately controlled with a fixed or adjustable frequency semiconductor power switches T 1 and T 2 , the one for power supply of Lamp LA serving 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.
  • the electronic lamp ballast shown in Fig. 2a has 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 2 heating power P H2 is transferred to the two filament electrodes W 1 and W. 2
  • 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 measuring resistor R M through which a portion of the helical current I W2 flows 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 an electronic lamp ballast for AC operation of a fluorescent lamp according to a second embodiment of the present invention is shown, which differs from the electronic ballast shown in Fig. 2a in that instead of a heating transformer HzTr with two magnetically coupled via a common ferrite core, galvanic a separate primary ( L p 1 , L p 2 ) and secondary windings ( L s 1 , L s 2 ) is used to provide heating energy to the filament electrodes W 1 and W 2 of the lamp LA power transformer HzTr 'whose primary side of two connected in parallel with each other, connected to the associated secondary side on the output taps Autotransformer windings L p 1 'and L p 2 ' , which are individually or combined switchable via a respective controllable semiconductor power switch T 3 and T 4 .
  • 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 for each of the two consisting of a pair of primary and a secondary side autotransformer winding part transformer results in a predetermined by the winding ratios of the individual autotransformer windings fixed voltage translation ratio ,
  • both heating circuits HzK 1 and HzK 2 are interrupted together, whereby the Schuputsmakersen 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.
  • Fig. 3 is a current-time diagram is shown, which shows the time course of the flowing through helical electrode W 1 preheat current I H 1 in the forward mode or in the blocking mode for connecting one of the two primary-side windings L p 1 and L p 2 of Banktransformators HzTr used controllable semiconductor power switch 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 a further 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 be done indirectly, for example, on the primary side, namely on the apparent in Figure 4 resistor R mp .
  • Fig. 5 shows another embodiment of the present invention, in which two primary windings Lph1, Lph2 are connected in series with each other.
  • the heating transformer shown in Fig. 5 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 Figure 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)
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 true EP1860925A1 (fr) 2007-11-28
EP1860925B1 EP1860925B1 (fr) 2009-11-18

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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)

Cited By (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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625077A1 (de) * 1996-06-22 1998-01-02 Diehl Gmbh & Co Leuchtstofflampen-Vorschaltgerät
GB2337644A (en) * 1998-05-22 1999-11-24 Mackwell Electronics Limited Starting and warming up of fluorescent lamps
EP1519638A1 (fr) * 2003-09-29 2005-03-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Méthode pour commander une lampe à décharge basse pression
DE102004009995A1 (de) * 2004-03-01 2005-09-22 Tridonicatco Gmbh & Co. Kg Schaltungsanordnung und Verfahren zum Betreiben einer Gasentladungslampe mit einem Heiztransformator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625077A1 (de) * 1996-06-22 1998-01-02 Diehl Gmbh & Co Leuchtstofflampen-Vorschaltgerät
GB2337644A (en) * 1998-05-22 1999-11-24 Mackwell Electronics Limited Starting and warming up of fluorescent lamps
EP1519638A1 (fr) * 2003-09-29 2005-03-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Méthode pour commander une lampe à décharge basse pression
DE102004009995A1 (de) * 2004-03-01 2005-09-22 Tridonicatco Gmbh & Co. Kg Schaltungsanordnung und Verfahren zum Betreiben einer Gasentladungslampe mit einem Heiztransformator

Cited By (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

Also Published As

Publication number Publication date
DE102006024700A1 (de) 2007-11-29
DE502007002005D1 (de) 2009-12-31
EP1860925B1 (fr) 2009-11-18
ATE449528T1 (de) 2009-12-15

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