EP1872635B1 - Dispositifs a regulation de tube par evaluation de la temperature de tube - Google Patents

Dispositifs a regulation de tube par evaluation de la temperature de tube Download PDF

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Publication number
EP1872635B1
EP1872635B1 EP06724015.0A EP06724015A EP1872635B1 EP 1872635 B1 EP1872635 B1 EP 1872635B1 EP 06724015 A EP06724015 A EP 06724015A EP 1872635 B1 EP1872635 B1 EP 1872635B1
Authority
EP
European Patent Office
Prior art keywords
lamp
voltage
rdis
fluorescent
power
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
EP06724015.0A
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German (de)
English (en)
Other versions
EP1872635A1 (fr
Inventor
Nebojsa Jelaca
Markus Mayrhofer
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.)
Tridonic GmbH and Co KG
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Tridonic GmbH and Co KG
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Application filed by Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Publication of EP1872635A1 publication Critical patent/EP1872635A1/fr
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Publication of EP1872635B1 publication Critical patent/EP1872635B1/fr
Not-in-force legal-status Critical Current
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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
    • H05B41/36—Controlling
    • 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations

Definitions

  • the present invention relates to the operation of AC powered fluorescent lamps, such as gas discharge lamps. More specifically, the invention relates to controls for such lamps, which take into account the directly or indirectly determined lamp temperature in the lamp control. Typically, such regulations are used in control gear such as electronic ballasts.
  • fluorescent lamps operated with dimmable electronic ballasts can be operated close to the nominal mode - and thus at nominal power - and on the other hand with dimmed, ie reduced lamp power.
  • the operation with nominal power is relatively unproblematic compared to the operation with reduced, in particular greatly reduced lamp power.
  • the permissible lamp ambient temperatures in dimming operation are specified much narrower compared to the normal power operation. Namely, at low dimming values, the ambient temperature of the lamp plays a greater role for a stable regulation of the dimmed fluorescent lamps, ie a regulation with constant light output and in particular a regulation which reliably prevents unwanted extinction of the lamp.
  • the stronger lamp ambient temperature dependence at low dimming levels is i.a. caused by the fact that the lamp voltage at low ambient temperatures and small lamp currents (as they occur with dimmed lamp power) increases sharply and may assume inadmissibly high values.
  • the temperature in the immediate vicinity of the lamp is crucial, which does not necessarily have to be the ambient temperature of an optionally provided spatially and thermally separately provided electronic ballast.
  • the temperature of the electronic ballast can not be used directly to assess the lamp ambient temperature.
  • the circuit arrangement has two pairs of lamp circuits, ie two fluorescent lamps at an AC generator output, which outputs a high-frequency AC voltage between two series-connected power switching transistors.
  • the circuit arrangement has a Zener diode in series with the primary winding of a heat exchanger, which generates a DC component in the primary winding of the heat exchanger, which prevents the effect of the "running layers" occurring when the lamps are dimmed.
  • the "running layers” consist in particular of dimming occurring light / dark zones, which run at a predetermined speed along the tubes. Overlaying low DC current accelerates this running effect so that it no longer interferes.
  • the central idea of the invention is to apply a targeted DC voltage to the lamp voltage.
  • the above-mentioned critical states can then be detected by detecting and evaluating the lamp pattern.
  • the targeted admission of the DC component thus enables a more accurate compared to the prior art detection of the lamp temperature.
  • a method of determining the temperature of an AC lamp powered fluorescent lamp In this case, the AC voltage is deliberately superimposed on a DC voltage.
  • the lamp voltage of the fluorescent lamp is detected, evaluated as a parameter for the temperature of the fluorescent lamp and used as the input variable of the lamp control.
  • the DC voltage component of the lamp voltage can be evaluated. Additional parameters of the lamp voltage can optionally also be taken into account during the evaluation.
  • the lamp voltage can be evaluated, for example, based on an asymmetry of the periodically extending lamp voltage.
  • the evaluation of the lamp voltage can be determined, for example, based on the distances of successive zero crossings of the lamp voltage.
  • the impedance can be evaluated digitally, in particular if the total lamp power control is digital.
  • the evaluation of the lamp voltage can be determined, for example, by digital counting of the distances between successive half-waves (zero crossings) of the lamp voltage.
  • the power of the lamp can be specifically controlled to a power lying above this predetermined dimming value (set value), especially at low dimming values.
  • This increase in the lamp power over a predetermined dimming value or setpoint can thus be carried out in particular at low lamp powers, in which u.a. There is a risk of the lamp extinguishing at low ambient temperatures.
  • Such a method can be used in an electronic ballast.
  • the present invention also relates to an electronic ballast for Fluorescent lamps having a digital circuit for implementing such a method.
  • the present invention also relates to a circuit for determining the temperature of a fluorescent lamp operated with alternating voltage.
  • a detection circuit for the voltage of the fluorescent lamp is provided, the output signal of which can be supplied to an evaluation circuit, which evaluates the detected lamp voltage as a parameter for the temperature of the fluorescent lamp and considered, for example, in the course of a digital lamp control.
  • the means for the targeted superposition of a DC voltage to the fluorescent lamp may have a DC voltage path, which is provided parallel to the AC operating voltage for the lamp.
  • the present invention also relates to an electronic ballast having such a circuit.
  • the invention also relates to a luminaire which has such an electronic ballast.
  • Fig. 4 is shown that the lamp voltage V Dis at low temperatures (see example, -15 ° C) in the low dimming range (represented by the lamp current I Dis ) can rise very high and may exceed permitted limits. In the reference example of a lamp temperature of 35 ° C, this effect occurs less strongly or not at all. At the same time it is off Fig. 4 to see that the lamp voltage V Dis is not a clear parameter for the temperature of the lamp as a whole. As can be seen, in the region of slightly higher lamp currents, the lamp voltage V Dis at higher temperatures (example 35 ° C.) may even exceed that at low temperatures (example -15 ° C.).
  • the illustrated dependency of the lamp voltage is due to the fact that the lamp resistance (ie the impedance of the discharge path of the lamp at the respective operating point) has both a dependence on the discharge current V Dis and on the ambient temperature T. In a certain operating point, in which the lamp current I Dis is kept substantially constant by the ballast, there is thus a dependence of the lamp impedance Z Dis on the ambient temperature T.
  • the present invention proposes to store the high-frequency operating voltage for the lamp U HF targeted a DC voltage V DC from a high-impedance source, so that then the voltage applied to the lamp voltage with respect to different criteria, such as, the DC Share, under which conditions the lamp is currently operated:
  • the source voltage V DC of the DC source is divided according to the resistance ratio of internal resistance of the DC source Z i to the impedance of the lamp Z l at the current operating point, wherein the lamp resistance Z l et al depends on the ambient temperature of the lamp T. This can also be done via the resistance ratio Z L / Z i + Z L the dependence of the measured DC component of the lamp voltage V DC, ZL on the ambient temperature T of the lamp is detected.
  • the electronic ballast can take appropriate countermeasures to meet. It makes sense to detect the DC component of the lamp voltage V DC, ZL over a certain time range and then to average it in order to take account of time compensation processes in the lamp.
  • the ballast can automatically increase the lamp power, for example, until the DC component of the lamp voltage V DC, ZL returns to permissible values , ie has fallen below the predetermined threshold.
  • automatically increasing the lamp power through the electronic ballast is to be understood that the electronic ballast also increases the lamp power over possibly supplied from the outside setpoints (dimming commands, etc.) and thus the stability of the lamp control has a higher priority than the strict compliance specified outside values (dimming commands, etc.) is granted.
  • This increase in the lamp power can be limited according to the invention to the range of low dimming values.
  • the electronic ballast decreases the lamp power back again until either the predetermined threshold value for the DC component of the lamp voltage V DC, ZL has been reached again or the preset desired value (dimming command, etc.) for the lamp power has now been correctly achieved.
  • Fig. 1a an electronic ballast according to the invention is illustrated schematically.
  • An inverter with two switches S1, S2 converts a provided DC voltage (DC link voltage, bus voltage) into a high-frequency operating voltage for a resonant load circuit.
  • the AC voltage is tapped at the midpoint of the two switches S1, S2.
  • the resonant load circuit has an inductance L R , a capacitor C R and a coupling capacitor C K.
  • a lamp which is schematically indicated by means of its internal resistance R Dis , is operated, as is generally known, with this high-frequency AC voltage.
  • the control of the switches S1, S2 and in particular the switching frequency of the alternating switching of the two switches S1, S2 is carried out by a lamp control, which can be performed digitally according to the invention.
  • the described alternating operating voltage for the lamp is deliberately superposed on a DC voltage component V DC .
  • a diode D and a resistor R DC are provided in parallel to the inductance L R and the coupling capacitor C K , which represent a DC voltage path parallel to the resonant circuit for the AC voltage.
  • a voltage divider with two resistors R1, R2 is provided.
  • a signal representing the lamp voltage V ZL is tapped at the midpoint of the voltage divider R1, R2 and supplied to the lamp control circuit.
  • the lamp control circuit further operating parameters such as the lamp current, etc., as well as externally specified values (Dimmbetatione, etc.) are supplied.
  • FIG. 6 A development of the present invention is in FIG. 6 and relates to the application to multi-lamp electronic ballasts, in which so several individual lamps are operated in parallel.
  • multi-lamp luminaires often the problem arises that the balancing of the lamp performance is often not guaranteed, especially at low dimming and low temperatures.
  • this also means that, for the reasons stated above, the lamp voltages of the two lamps operated by the same electronic ballast can have greatly different values.
  • the lamp power control can be carried out digitally.
  • the DC voltage component of the lamp voltage is digitally detected. This will now be with reference to FIGS. 2 and 3 be explained.
  • Fig. 2 shows a circuit implementation of this embodiment with an up / down counter 107, which receives as a real input signal, a signal U ZERO and further as a control signals, a high-frequency reference clock signal CLK and a reset or reset signal.
  • the advantage here is the digital detection of the feedback signal by evaluation, for example, the zero crossings of the lamp voltage.
  • the signal U ZERO assumes during each positive half wave of the voltage applied to the terminal V L lamp voltage to a positive and otherwise a negative voltage level and thus detects the zero crossing of the lamp voltage.
  • the counter 107 is started at zero crossing of the lamp voltage and counts during the subsequent half cycle of the lamp voltage either up or down. Thus, the zero crossings are digitally counted.
  • the counting direction of the counter 107 is reversed.
  • the current count N of the counter 103 is a comparator connected, which may be formed for example by the comparator 103 already described above. This comparator 103 compares the current counter reading N with the initialization value or the original counter reading of the counter 107. If there is no rectification effect, the counter reading N must have reached the output value N 0 again after reaching the next zero crossing of the lamp voltage. On the other hand, if the count N deviates from the output value N 0 , a DC voltage component is present in the lamp voltage.
  • the comparator 103 compares the count N with the output value N 0 within certain tolerance limits, so as not to prematurely infer the presence of a rectifying effect.
  • the output signal of the comparator 103 is supplied via a clocked by a latch signal D flip-flop 108 of the Meßphasen Kunststoffung 900, which - as described above - evaluates this signal and in particular performs an event filtered score, ie only on the presence of a DC voltage component closes, if one of the comparator 103, for example, 32 times successively every 255th Period of the lamp voltage, a DC component is reported.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (21)

  1. Procédé de régulation du fonctionnement d'une lampe fluorescente (RDis) fonctionnant avec une tension alternative (UHF),
    présentant les étapes suivantes :
    - superposition ciblée d'une tension continue (VDC) à la lampe fluorescente (RDis),
    - détection de la tension de lampe de la lampe fluorescente (RDis), et
    - évaluation de la tension de lampe en tant que grandeur d'entrée de la régulation de la puissance de lampe,
    dans lequel l'évaluation de la tension de lampe comprend au moins la détection d'une composante de tension continue de la tension de lampe,
    dans lequel les passages par zéro de la tension de lampe sont détectés et la tension de lampe est évaluée au moyen d'un comptage numérique des espacements de passages par zéro successifs de la tension de lampe.
  2. Procédé selon la revendication 1,
    dans lequel la tension de lampe est évaluée à partir d'une asymétrie de la tension de lampe variant dans le temps de manière périodique.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    la tension de lampe est évaluée numériquement.
  4. Procédé selon l'une des revendications précédentes,
    dans lequel, en fonction de l'évaluation de la tension de lampe, la puissance de la lampe (RDis) est augmentée à une valeur qui est supérieure à une valeur de consigne prédéfinie de manière externe.
  5. Procédé selon la revendication 4,
    dans lequel l'augmentation de la puissance de lampe est effectuée uniquement en cas de puissance de lampe basse.
  6. Procédé selon l'une des revendications précédentes,
    dans lequel la régulation de la puissance de lampe est effectuée numériquement.
  7. Procédé selon l'une des revendications précédentes,
    dans lequel, pour la détection de la température de la lampe fluorescente (RDis) fonctionnant avec une tension alternative, il est effectué une évaluation d'au moins la composante de tension continue de la tension de lampe et le cas échéant d'autres paramètres de la tension de lampe en tant que paramètre(s) pour la température de la lampe fluorescente (RDis).
  8. Procédé selon l'une des revendications précédentes,
    dans lequel, pour la régulation du fonctionnement de plusieurs lampes fluorescentes fonctionnant en parallèle et fonctionnant avec une tension alternative, les étapes suivantes sont exécutées :
    - superposition ciblée d'une tension continue à chacune desdites plusieurs lampes fluorescentes,
    - détection de la tension de lampe de chacune desdites plusieurs lampes fluorescentes, et
    - évaluation des tensions de lampe respectives en tant que grandeurs d'entrée de la régulation de la puissance de lampe.
  9. Procédé selon la revendication 8,
    dans lequel la différence des tensions de lampe est détectée.
  10. Procédé selon la revendication 9,
    dans lequel la différence des composantes de tension continue des tensions de lampe est détectée.
  11. Procédé selon la revendication 10,
    dans lequel les puissances de lampe sont augmentées lorsque la différence des composantes de tension continue des tensions de lampe dépasse un seuil.
  12. Circuit destiné à la régulation du fonctionnement d'une lampe fluorescente (RDis) fonctionnant avec une tension alternative (UHF),
    présentant :
    - des moyens destinés à une superposition ciblée d'une tension continue (VDC) à la lampe fluorescente (RDis),
    - un circuit de détection destiné à la détection de la tension de lampe de la lampe fluorescente (RDis), et
    - des moyens destinés à l'évaluation de la tension de lampe en tant que grandeur d'entrée de la régulation de la puissance de lampe,
    dans lequel les moyens destinés à l'évaluation de la tension de lampe détectent au moins une composante de tension continue de la tension de lampe,
    dans lequel le circuit de régulation comprend des moyens pour détecter les passages par zéro de la tension de lampe et évaluer la tension de lampe au moyen d'un comptage numérique des espacements de passages par zéro successifs de la tension de lampe.
  13. Circuit selon la revendication 12,
    présentant un circuit de régulation pour la puissance de la lampe, lequel reçoit la tension de lampe en tant que grandeur d'entrée,
    dans lequel le circuit de régulation est conçu pour détecter une asymétrie de la tension de lampe variant périodiquement dans le temps.
  14. Circuit selon la revendication 12 ou 13,
    dans lequel les moyens destinés à une superposition ciblée d'une tension continue (VDC) à la lampe fluorescente (RDis) présentent un trajet de tension continue, qui est prévu en parallèle de la tension de fonctionnement alternative pour la lampe.
  15. Circuit selon l'une des revendications 12 à 14,
    dans lequel le circuit d'évaluation est réalisé numériquement.
  16. Circuit selon l'une des revendications 12 à 15,
    dans lequel le circuit de régulation est conçu pour augmenter, en fonction de l'évaluation de la tension de lampe, la puissance de la lampe à une valeur qui est supérieure à une valeur de consigne fournie au circuit de manière externe.
  17. Circuit selon l'une des revendications précédentes destiné à la commande de plusieurs lampes fluorescentes fonctionnant en parallèle et fonctionnant avec une tension alternative, présentant un circuit de régulation de lampe, qui prend en compte les tensions de lampe respectives en tant que grandeurs d'entrée pour la régulation des puissances de lampe.
  18. Circuit selon la revendication 17,
    dans lequel le circuit de régulation de lampe détecte la différence des tensions de lampe.
  19. Circuit selon la revendication 18,
    dans lequel le circuit de régulation de lampe détecte la différence des composantes de tension continue des tensions de lampe.
  20. Circuit selon la revendication 19,
    dans lequel le circuit de régulation de lampe augmente les puissances de lampe lorsque la différence des composantes de tension continue des tensions de lampe dépasse une valeur de seuil.
  21. Appareil d'alimentation pour lampe fluorescente (RDis) présentant un circuit selon l'une des revendications 12 à 20.
EP06724015.0A 2005-04-22 2006-04-04 Dispositifs a regulation de tube par evaluation de la temperature de tube Not-in-force EP1872635B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510018763 DE102005018763A1 (de) 2005-04-22 2005-04-22 Betriebsgeräte mit Auswertung der Lampentemperatur bei der Lampenregelung
PCT/EP2006/003060 WO2006111269A1 (fr) 2005-04-22 2006-04-04 Dispositifs a regulation de tube par evaluation de la temperature de tube

Publications (2)

Publication Number Publication Date
EP1872635A1 EP1872635A1 (fr) 2008-01-02
EP1872635B1 true EP1872635B1 (fr) 2013-10-16

Family

ID=36947591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06724015.0A Not-in-force EP1872635B1 (fr) 2005-04-22 2006-04-04 Dispositifs a regulation de tube par evaluation de la temperature de tube

Country Status (4)

Country Link
EP (1) EP1872635B1 (fr)
CN (1) CN101164390B (fr)
DE (1) DE102005018763A1 (fr)
WO (1) WO2006111269A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4608470B2 (ja) 2006-08-31 2011-01-12 パナソニック電工株式会社 放電灯点灯装置、及び照明装置
DE102012207002A1 (de) * 2011-12-23 2013-06-27 Tridonic Gmbh & Co. Kg Verfahren, Betriebsgerät und Beleuchtungssystem

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4039161C2 (de) * 1990-12-07 2001-05-31 Zumtobel Ag Dornbirn System zur Steuerung der Helligkeit und des Betriebsverhaltens von Leuchtstofflampen
JP3324270B2 (ja) * 1993-04-23 2002-09-17 松下電工株式会社 放電灯点灯装置
US6218787B1 (en) * 1998-04-20 2001-04-17 Jrs Technology Inc. Remote dimming control system for a fluorescent ballast utilizing existing building wiring
JP4104808B2 (ja) * 2000-04-27 2008-06-18 株式会社三社電機製作所 ランプ点灯用電源装置
JP3945681B2 (ja) * 2001-03-07 2007-07-18 株式会社日立製作所 照明用点灯装置
DE10206731B4 (de) * 2002-02-18 2016-12-22 Tridonic Gmbh & Co Kg Lampensensor für ein Vorschaltgerät zum Betrieb einer Gasentladunslampe

Also Published As

Publication number Publication date
WO2006111269A1 (fr) 2006-10-26
DE102005018763A1 (de) 2006-10-26
EP1872635A1 (fr) 2008-01-02
CN101164390A (zh) 2008-04-16
CN101164390B (zh) 2012-01-25

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