WO2012109687A1 - Procédé d'identification d'un effet schottky dans une lampe à décharge à gradation de lumière - Google Patents

Procédé d'identification d'un effet schottky dans une lampe à décharge à gradation de lumière Download PDF

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Publication number
WO2012109687A1
WO2012109687A1 PCT/AT2012/000035 AT2012000035W WO2012109687A1 WO 2012109687 A1 WO2012109687 A1 WO 2012109687A1 AT 2012000035 W AT2012000035 W AT 2012000035W WO 2012109687 A1 WO2012109687 A1 WO 2012109687A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
values
dimming
value
pref
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.)
Ceased
Application number
PCT/AT2012/000035
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German (de)
English (en)
Inventor
Daniel Salzmann
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
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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Publication of WO2012109687A1 publication Critical patent/WO2012109687A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/295—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—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
    • H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation

Definitions

  • the emitter material at the electrodes is consumed.
  • the emitter of the filament is consumed. This has the consequence that the exit energy of the electrons is increased.
  • the increased voltage drop also referred to as "cathode drop” results in an increase in power, which leads to an increase in the surface temperature to that in the region of the electrodes.
  • ions accelerate and strike the gas from the gas in the direction of the helix, resulting in the risk of melting the lamp socket end of life), ie they turn off the lamp as it approaches the end of its life, before the risk described above becomes reality.
  • a dimmable gas discharge lamp according to the independent claim 1 to make the rectifier effect recognizable by comparing a measuring signal fed back from the load circuit containing the gas discharge lamp with a reference value
  • the reference value is set as a discrete or continuous function depending on a parameter directly or indirectly representing the dimming value of the gas discharge lamp.
  • the reference value function may preferably have a curve profile obtained by interpolation of measured reference values.
  • a measurement signal is derived from the lamp voltage, the lamp current or the lamp power, which contains a corresponding DC component, if a rectifier effect occurs in the lamp
  • the DC component signal is compared with a stored reference signal which, depending on the respective dimming value, corresponds to an admissible limit value for the DC component signals
  • the reference signals can be used as a table of discrete individual reference values or as the discrete ones
  • Single reference values formed staircase function or as a non-continuous function in which the individual Reference values are connected by respective straight line sections, or stored as a continuous function of continuously successive reference values.
  • the straight-line sections of the non-continuous function can be determined by interpolation of the limiting individual reference values.
  • the individual reference values or the function formed by them are expediently chosen such that a reference value corresponding to a higher dimming value is greater than or equal to a reference value corresponding to a lower dimming value.
  • Means for generating an AC supply voltage for the lamp
  • Means which are connected to a load circuit enclosing the lamp and serve to generate a measurement signal which corresponds to the lamp current of the lamp voltage or the lamp power,
  • the storage means may be connected to a bus delivering the dimming values.
  • the reference value can additionally be selected depending on the type of the connected gas discharge lamp.
  • the reference values stored in the storage means can be individual values which correspond to certain spaced dimming values and form a staircase function.
  • the reference values may also form a non-continuous function dependent on the dimming values, which consists of straight line sections,
  • each straight line section extends between in each case two individual reference values
  • FIG. 1 is a schematic block diagram of a gas discharge lamp with detection of the rectifier effect and EoL shutdown
  • FIG. 2 shows a graphical representation of the reference values as a function of the dimming values.
  • a gas discharge lamp L is operated with a high-frequency AC voltage U A c. This is generated from an operating voltage U D c by means of a switch half bridge 1.
  • the operating voltage U D c is generated for example by rectification of the mains voltage.
  • the rectifier is not shown here.
  • the switch half-bridge 1 consists of two series-connected electronic switch elements Sl, S2 in the form of FETs.
  • the two switch elements Sl and S2 are connected as a series circuit together with a resistor Rl between the positive terminal + U D c and ground.
  • the two switch elements Sl and S2 are switched in a push-pull by a control unit 3 conductive and non-conductive. This produces at the bridge point between the two switch elements Sl and S2 required for the operation of the gas discharge lamp L high-frequency
  • the excessive resonant voltage occurring across the resonant capacitor C1 is supplied via a coupling capacitor C2 of the one electrode of the gas discharge lamp L, whose other electrode is grounded via a shunt resistor R4 (current measuring resistor).
  • the lamp current I L flowing through the shunt resistor R4 causes a voltage drop at the shunt resistor R4, which is supplied as an actual value signal S to a control unit 3 controlling the switch elements S1 and S2.
  • a voltage divider In parallel with the series connection of the gas discharge lamp L and the shunt resistor R4 is also a voltage divider, which is formed by two resistors R2 and R3.
  • the voltage drop across the voltage divider R2, R3 corresponds to the AC lamp voltage ⁇ ⁇ .
  • the voltage R3 of this voltage is fed as measurement signal M to the control unit 3 on the one hand and to a DC evaluation circuit part 5 on the other hand.
  • one electrode of the gas discharge lamp L wears off more than the other. This results in a rectifier effect, which manifests itself in that the measurement signal M contains a DC component. This is detected by the DC evaluation circuit part 5.
  • a DC share signal P D c- This signal is a power value, which is indicated in watts.
  • the control unit 3 is connected to a bus, preferably a DALI bus. Via the DALI bus, digital dimming signals D (not shown) are transmitted to the control unit 3.
  • the dimming signals D are formed by eight bits. The eight bits defining a number between 0 and 256 yields.
  • the lamp L operates at full power and maximum brightness.
  • the greatest possible dimming is when the dimming value D reaches about 85.
  • the greatest possible dimming leads to the lowest possible brightness with the L lamp. That's the brightness that you just have not extinguished.
  • the control unit evaluates the dimming values D by changing the repetition frequency of the switching signals for the two switch elements Sl and S2 and / or the pulse width representing the switch-on duration.
  • the dimming values D sent by the control center via the bus are also fed to an EoL reference value memory 6.
  • reference values P REF corresponding to the dimming values are stored, either in the form of a table or a function curve.
  • Each reference value P REF represents a maximum permissible value for a DC component value P D c at a certain dimming value.
  • FIG. 2 shows two possibilities for a function curve. It can be seen that numerical values corresponding to dimming values D are plotted on the abscissa. The numbers are between 85 and 256. The ordinate plots reference values P REF in watts. The reference values P D c are between " o and 60 W. In each case, corresponding reference values P REF in watt are entered for discrete dimming values D, which are each spaced 15 watts apart.
  • the corner points of the staircase function are additionally connected by straight line sections with which the areas between the corner points have been bridged by extrapolation.
  • the corresponding reference values P RE F can be selected as a function of the dimming value and the lamp type.
  • the type of the connected gas discharge lamp can be carried out, for example, by means of a helix identification or a measurement of the power characteristic of the connected gas discharge lamp. For example, such a determination of the type of gas discharge lamp may be made at each restart or after each lamp replacement. In this way, an adaptation of the permissible DC component to the actual actual power of the gas discharge lamp is to be allowed in accordance with the dimming value.
  • the reference value (PREF) can additionally be selected depending on the type of the connected gas discharge lamp.
  • the DC component can be determined, for example, by supplying the measurement signal M to the DC evaluation circuit part 5.
  • Circuit parts 5 the measurement signal M of it with a reference voltage Vref (not shown) compared.
  • the result of the comparison is supplied to a duty cycle evaluation unit, which is a system clock is clocked.
  • the duty cycle can be determined, for example, by providing a digital counter which, for example, counts downwards in the case of a measuring signal M which is smaller than the reference voltage Vref and counts upwards in the case of a measuring signal M which is greater than the reference voltage Vref.
  • the deviation of the count from its output level is a measure of the DC component of the lamp voltage.
  • Such a determination of the DC component can also take place over several periods of the control of the switch half-bridge 1.
  • the DC component can also be effected, for example, by comparing the positive and the negative peak value of the lamp voltage or by integrating the lamp voltage over one or more periods of the activation of the switch half-bridge 1.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un procédé permettant d'identifier un effet Schottky dans une lampe à décharge (L) à gradation de lumière, ledit effet Schottky étant identifié du fait qu'un signal de mesure (M) renvoyé depuis le circuit de charge (L,C1, C2, R2, R3, R4, L) contenant la lampe à décharge (1) est comparé à une valeur de référence (PREF), ladite valeur de référence (PREF) étant ajustée en tant que fonction discrète ou continue, en fonction d'un paramètre reproduisant directement ou indirectement la valeur de gradation (D) de la lampe à décharge (L).
PCT/AT2012/000035 2011-02-18 2012-02-20 Procédé d'identification d'un effet schottky dans une lampe à décharge à gradation de lumière Ceased WO2012109687A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011004351.9 2011-02-18
DE201110004351 DE102011004351A1 (de) 2011-02-18 2011-02-18 Verfahren zum Erkennen eines Gleichrichtereffektes bei einer dimmbaren Gasentladungslampe

Publications (1)

Publication Number Publication Date
WO2012109687A1 true WO2012109687A1 (fr) 2012-08-23

Family

ID=45991973

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2012/000035 Ceased WO2012109687A1 (fr) 2011-02-18 2012-02-20 Procédé d'identification d'un effet schottky dans une lampe à décharge à gradation de lumière

Country Status (2)

Country Link
DE (1) DE102011004351A1 (fr)
WO (1) WO2012109687A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012207002A1 (de) * 2011-12-23 2013-06-27 Tridonic Gmbh & Co. Kg Verfahren, Betriebsgerät und Beleuchtungssystem

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034647A1 (fr) * 1997-12-23 1999-07-08 Tridonic Bauelemente Gmbh Procede et dispositif permettant de detecter l'effet redresseur apparaissant dans une lampe a decharge
WO2003041457A1 (fr) * 2001-11-07 2003-05-15 Koninklijke Philips Electronics N.V. Arrangement de circuit ballast assurant le fonctionnement d'une lampe a decharge, avec detection de la fin de duree de vie de cette lampe
WO2008116561A1 (fr) 2007-03-28 2008-10-02 Tridonicatco Gmbh & Co.Kg Détection de défaut dans un appareil électrique pour moyen d'éclairage
DE102008013852A1 (de) * 2008-03-12 2009-09-17 Tridonicatco Gmbh & Co. Kg Fehlererfassung in einem Betriebsgerät für Leuchtmittel
US20100001649A1 (en) * 2008-06-25 2010-01-07 Masafumi Yamamoto Electronic Ballast with Lamp End of Life Detection and Protection Circuits
US20100001650A1 (en) * 2008-06-25 2010-01-07 Tetsuya Hamana Lamp End of Life Protection Circuit and Method for an Electronic Dimming Ballast
US20100096995A1 (en) * 2008-09-12 2010-04-22 Naokage Kishimoto Dimming electronic ballast with lamp end of life detection
US20100327763A1 (en) * 2009-06-30 2010-12-30 General Electric Company Ballast with end-of-life protection for one or more lamps

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW381409B (en) * 1996-03-14 2000-02-01 Mitsubishi Electric Corp Discharging lamp lighting device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034647A1 (fr) * 1997-12-23 1999-07-08 Tridonic Bauelemente Gmbh Procede et dispositif permettant de detecter l'effet redresseur apparaissant dans une lampe a decharge
EP1066739B1 (fr) 1997-12-23 2002-02-27 Tridonic Bauelemente GmbH Procede et dispositif permettant de detecter l'effet redresseur apparaissant dans une lampe a decharge
WO2003041457A1 (fr) * 2001-11-07 2003-05-15 Koninklijke Philips Electronics N.V. Arrangement de circuit ballast assurant le fonctionnement d'une lampe a decharge, avec detection de la fin de duree de vie de cette lampe
WO2008116561A1 (fr) 2007-03-28 2008-10-02 Tridonicatco Gmbh & Co.Kg Détection de défaut dans un appareil électrique pour moyen d'éclairage
DE102008013852A1 (de) * 2008-03-12 2009-09-17 Tridonicatco Gmbh & Co. Kg Fehlererfassung in einem Betriebsgerät für Leuchtmittel
US20100001649A1 (en) * 2008-06-25 2010-01-07 Masafumi Yamamoto Electronic Ballast with Lamp End of Life Detection and Protection Circuits
US20100001650A1 (en) * 2008-06-25 2010-01-07 Tetsuya Hamana Lamp End of Life Protection Circuit and Method for an Electronic Dimming Ballast
US20100096995A1 (en) * 2008-09-12 2010-04-22 Naokage Kishimoto Dimming electronic ballast with lamp end of life detection
US20100327763A1 (en) * 2009-06-30 2010-12-30 General Electric Company Ballast with end-of-life protection for one or more lamps

Also Published As

Publication number Publication date
DE102011004351A1 (de) 2012-08-23

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