EP1908337B2 - Regulation adaptative de la puissance de lampes a decharge gazeuse - Google Patents

Regulation adaptative de la puissance de lampes a decharge gazeuse Download PDF

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Publication number
EP1908337B2
EP1908337B2 EP20060754719 EP06754719A EP1908337B2 EP 1908337 B2 EP1908337 B2 EP 1908337B2 EP 20060754719 EP20060754719 EP 20060754719 EP 06754719 A EP06754719 A EP 06754719A EP 1908337 B2 EP1908337 B2 EP 1908337B2
Authority
EP
European Patent Office
Prior art keywords
value
lamp
desired value
gas discharge
difference
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
EP20060754719
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German (de)
English (en)
Other versions
EP1908337B1 (fr
EP1908337A1 (fr
Inventor
Stefan Zudrell-Koch
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
Original Assignee
Tridonic GmbH and Co KG
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Publication date
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Application filed by Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Publication of EP1908337A1 publication Critical patent/EP1908337A1/fr
Publication of EP1908337B1 publication Critical patent/EP1908337B1/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
    • H05B41/36—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
    • 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

Definitions

  • the invention relates to methods for controlling the operation of a gas discharge lamp.
  • Background of the present invention is quite generally the power control of gas discharge lamps, which are operated with alternating voltage, by means of an upstream operating device.
  • gas discharge lamps which are operated with alternating voltage, by means of an upstream operating device.
  • a ballast in particular an electronic ballast.
  • the ballast will then generate a drive value for the lamp power, which drive value in the case of AC powered gas discharge lamps is for example the frequency of the supplied AC voltage, thus exploiting dimming by utilizing the known resonance curve of such lamps in a resonant load circuit.
  • the document US 5,806,055 shows a method of operating a fluorescent lamp, which detects and corrects a lamp extinction.
  • the document US 6,307,765 shows a method of operating a fluorescent lamp. A dimming operation is shown. In addition, a method for preventing instabilities in operation is shown.
  • the invention addresses this point and proposes a technique to ensure the power regulation of a gas discharge lamp even under the low dimming / low temperature conditions mentioned.
  • the central idea of the invention is that in such conditions, the exact compliance with the externally specified setpoint in the form of a variable dimming value is given a lower priority than the operation of the lamp at a stable operating point.
  • the invention thus according to a first aspect provides a method for controlling the operation of a gas discharge lamp.
  • a setpoint in the form of a variable dimming value for the lamp power ie a dimming setpoint
  • a parameter on the lamp is detected, which is an indication of the lamp power.
  • This parameter is returned as the actual value.
  • a drive value for the lamp power is generated as a function of the difference of the setpoint value and the said returned actual value, which is weighted by a controller function.
  • the setpoint value is internally increased via the externally specified setpoint, if it is detected on the basis of the controller difference that there are instabilities in the control loop. Instabilities are detected when the control difference has cyclic temporal fluctuations.
  • the control loop comprises in particular the load circuit with the gas discharge lamp.
  • the modification of the setpoint results in an increase of the setpoint value beyond the externally specified value, since regularly increasing the setpoint leads to a more stable operation with a higher dimming output.
  • an instability of the control loop can be detected even if there is a static controller difference that can not be compensated by the normal controller function.
  • the modification of the setpoint may be limited to low external setpoints and / or low temperatures.
  • the modification of the setpoint can of course be canceled as soon as the control loop is recognized as stable again. Thus, then the lamp power will approach the externally specified value.
  • the modification of the desired value can be carried out continuously.
  • the modification of the reference value can be carried out with a time constant that is large in relation to the instabilities of the control loop and the dynamics of the control loop.
  • Such a controller function can be implemented digitally, but also analogously or hybrid.
  • control module for a lamp operating device which is designed for such a method and may be, for example, an ASIC or a microcontroller.
  • the invention also relates to control gear for gas discharge lamps, such as electronic ballasts (electronic ballasts for fluorescent lamps or high-pressure gas discharge lamps), which have such a control module or are suitable for supporting the aforementioned method.
  • electronic ballasts electronic ballasts for fluorescent lamps or high-pressure gas discharge lamps
  • the invention also relates to a computer software program product that implements such a method when running on a computing device.
  • Fig. 1 an electronic regulator circuit for the operation of a gas discharge lamp 2 is provided with the reference numeral 1.
  • This regulator circuit 1 can be implemented analog and / or digital.
  • the illustrated functions may be implemented by a microcontroller, and in particular by an ASIC.
  • the lamp 2 is part of a load circuit 3, which has an RL resonance circuit 4.
  • variable resistor Due to the operating point dependent impedance of a gas discharge lamp, this is shown schematically as a variable resistor.
  • the load circuit 3 is a high-frequency alternating voltage supplied, which is tapped at the midpoint 5 of a half-bridge circuit 6 with two electronic switches (FETs). The switches of the half-bridge are in turn supplied with a DC supply voltage V bus .
  • the circuit 1, which is part of an operating device for the lamp 2, is connected to a data bus 7, which can supply various commands, in particular set values for the power of the lamp 2 (so-called dimming values) to a dimming interface 8.
  • the dimming interface 8 is connected to a system controller 9 and is available this in bidirectional communication, wherein the system controller 9 has functions implemented via firmware.
  • the system controller is with a system memory 10 in bidirectional communication.
  • the circuit 1 has a system clock 11.
  • a signal 12 is tapped, which reflects the current power of the lamp 2.
  • Examples of such a signal are, for example, the lamp voltage and / or the lamp current.
  • This signal 12 is supplied to the circuit 1 and digitized there by an AD converter 13.
  • the system controller 9 depending on the externally supplied setpoint (Dimmwert) before a control value for the control circuit.
  • This predetermined control value is compared with the detected and digitized signal 12 and then fed to a controller 14 as a control difference.
  • a controller 14 a known control algorithm is implemented.
  • the controller 14 generates depending on the detected controller difference, a control value for a driver circuit 15, which in turn drives the switches of the half-bridge circuit 6, for example by means of PWM modulation.
  • the control value which is compared with the actual value 12, now depends not only on the externally predetermined value of the dimming interface 8. Rather, a controller difference detection unit 16 is provided which evaluates the controller difference and in particular determines the time profile and the static properties of the controller difference.
  • the controller difference detection unit 16 is designed to detect cyclic fluctuations over time of the controller error.
  • controller difference detection unit 16 may be additionally configured to be statically unregulated Determine controller differences. It is designed to send a corresponding controller difference detection signal to the system controller 9.
  • the system controller 9 can preset the control value deviating from the received via the dimming interface 8 external setpoint and / or specifications for the controller difference detection circuit 16 depending on the detected specifics in the controller difference do.
  • controller difference detection unit 16 can also be part of the controller 9 in the form of an evaluation algorithm.
  • controller difference detection unit 16 may also be designed as a (in particular hard-wired) logic circuit or as a hybrid unit.
  • control difference is filtered in a first step by a hard-wired logic circuit with respect to the amplitude and the time changes (see “Filtered” in FIG. 2 ). That is, only when there is a change over a defined threshold during a defined period of time, a signal "Illegal controller difference" is set.
  • This signal is then evaluated by the firmware of the controller 9 and counted up when set signal, the setpoint and counted down when not set signal.
  • the step size and the clock rate of counting can be adjustable, for example, depending on the lamp power.
  • system controller 9 may also have the properties, in particular the dynamic properties of the controller function implemented in the controller 14 to adjust. For this purpose, for example, he can access parameter sets in the system memory 10.
  • Fig. 2 An example of this is in Fig. 2 shown.
  • the external predetermined setpoint is changed from a higher dimming value S2 to a low dimming value S1.
  • the controller difference can be as in Fig. 2 can be filtered, wherein at the time t 2, the filtered controller difference value exceeds a predetermined setpoint.
  • the system controller 9 causes a corresponding filtered signal from the controller difference detection unit 16 is supplied, that the target value is increased beyond the actually externally specified value S1 addition, in order to achieve a stabilization of the control loop.
  • the modulation of the target value carried out by the system controller 9 is carried out continuously in both directions (i.e., both in the change other than the externally set value and in the approach).
  • the time constant is relatively large (in comparison to the typical instabilities of the control loop or the dynamics of the control loop), so that it can be continuously checked whether the setpoint further approximated to the externally specified value, so usually can be further reduced.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (12)

  1. Procédé pour la régulation du fonctionnement d'une lampe à décharge de gaz, présentant les étapes suivantes :
    - spécification externe d'une valeur de consigne, sous la forme d'une valeur de gradation modifiable, pour la puissance de la lampe,
    - détection et rétroaction d'un paramètre, qui reproduit la puissance réelle de la lampe, en tant que valeur réelle, et
    - génération d'une valeur de commande pour la puissance de la lampe en fonction de la différence, pondérée par une fonction de régulateur, entre la valeur de consigne et la valeur réelle,
    dans lequel la valeur de consigne est augmentée de manière interne au-dessus de la valeur de consigne spécifiée de manière externe lorsque des instabilités de la boucle de régulation sont identifiées sur la base de la différence de régulation entre valeur de consigne et valeur réelle, et
    dans lequel des instabilités sont identifiées lorsque la différence de régulation présente des fluctuations temporelles cycliques.
  2. Procédé selon la revendication 1,
    dans lequel la valeur de consigne est modifiée lorsqu'il existe une différence de régulation statique.
  3. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel la valeur de consigne est modifiée uniquement en cas de faibles valeurs de consigne externes.
  4. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel la modification de la valeur de consigne est annulée dès que la boucle de régulation est à nouveau stable.
  5. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel la modification de la valeur de consigne est réalisée de manière continue.
  6. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel la modification de la valeur de consigne est exécutée avec une constante de temps qui est grande par rapport aux instabilités de la boucle de régulation.
  7. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel la fonction de régulateur est mise en oeuvre numériquement.
  8. Module de commande pour un appareil de commande de lampe,
    qui est conçu pour mettre en oeuvre un procédé selon l'une quelconque des revendications précédentes.
  9. Module de commande selon la revendication 8,
    caractérisé en ce qu'il s'agit d'un ASIC.
  10. Appareil de commande pour lampes à décharge de gaz,
    présentant un module de commande selon la revendication 8 ou 9.
  11. Appareil de commande pour lampes à décharge de gaz selon la revendication 10,
    caractérisé en ce qu'il s'agit d'un ballast électronique pour une lampe fluorescente ou une lampe à décharge de gaz à haute pression.
  12. Produit programme d'ordinateur,
    qui met en oeuvre un procédé selon l'une quelconque des revendications 1 à 7 lorsqu'il est exécuté sur un dispositif de calcul.
EP20060754719 2005-07-28 2006-07-12 Regulation adaptative de la puissance de lampes a decharge gazeuse Not-in-force EP1908337B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005035466A DE102005035466A1 (de) 2005-07-28 2005-07-28 Adaptive Regelung der Leistung von Gasentladungslampen
PCT/EP2006/006824 WO2007012403A1 (fr) 2005-07-28 2006-07-12 Regulation adaptative de la puissance de lampes a decharge gazeuse

Publications (3)

Publication Number Publication Date
EP1908337A1 EP1908337A1 (fr) 2008-04-09
EP1908337B1 EP1908337B1 (fr) 2009-11-18
EP1908337B2 true EP1908337B2 (fr) 2015-05-06

Family

ID=36954478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060754719 Not-in-force EP1908337B2 (fr) 2005-07-28 2006-07-12 Regulation adaptative de la puissance de lampes a decharge gazeuse

Country Status (4)

Country Link
EP (1) EP1908337B2 (fr)
AT (1) ATE449529T1 (fr)
DE (2) DE102005035466A1 (fr)
WO (1) WO2007012403A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009032028A1 (de) * 2009-07-07 2011-01-13 Tridonicatco Gmbh & Co. Kg Verfahren zum Betrieb von Gasentladungslampen bei niedrigen Außentemperaturen und dafür ausgelegtes Betriebsgerät
DE102010042020A1 (de) * 2010-10-06 2012-04-12 Osram Ag Schaltung und Verfahren zur Ansteuerung einer Lampe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5382881A (en) * 1992-12-28 1995-01-17 North American Philips Corporation Ballast stabilization circuitry for eliminating moding or oscillation of the current envelope in gas discharge lamps and method of operating
US5623187A (en) * 1994-12-28 1997-04-22 Philips Electronics North America Corporation Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control
US5734232A (en) * 1995-11-07 1998-03-31 U.S. Philips Corporation Circuit arrangement
DE10225881A1 (de) * 2002-06-11 2004-01-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampenbetriebsschaltung mit Schaltung zur Detektion der Nähe zu einem kapazitiven Betrieb
JP2005227748A (ja) * 2004-01-14 2005-08-25 Sanyo Electric Co Ltd 投射型映像表示装置

Also Published As

Publication number Publication date
EP1908337B1 (fr) 2009-11-18
DE102005035466A1 (de) 2007-02-01
ATE449529T1 (de) 2009-12-15
EP1908337A1 (fr) 2008-04-09
DE502006005415D1 (de) 2009-12-31
WO2007012403A1 (fr) 2007-02-01

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