EP2274960A1 - Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge - Google Patents

Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge

Info

Publication number
EP2274960A1
EP2274960A1 EP08736581A EP08736581A EP2274960A1 EP 2274960 A1 EP2274960 A1 EP 2274960A1 EP 08736581 A EP08736581 A EP 08736581A EP 08736581 A EP08736581 A EP 08736581A EP 2274960 A1 EP2274960 A1 EP 2274960A1
Authority
EP
European Patent Office
Prior art keywords
value
threshold value
threshold
lamp
coupled
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.)
Granted
Application number
EP08736581A
Other languages
German (de)
English (en)
Other versions
EP2274960B1 (fr
Inventor
Peter Krummel
Andreas Mitze
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2274960A1 publication Critical patent/EP2274960A1/fr
Application granted granted Critical
Publication of EP2274960B1 publication Critical patent/EP2274960B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 a method for operating at least one discharge lamp on a circuit arrangement having an input with a first and a second input terminal for connecting a DC supply voltage, an output with at least a first and a second output terminal for connecting the at least one discharge lamp, an inverter with at least a first and a second electronic switch, which are coupled in series between the first and the second input terminal, wherein between the first and the second switch, a center of the inverter is formed, an ignition device, which comprises a lamp inductor and a resonant ⁇ nanzkondensator, a A preheater comprising the series connection of a primary inductor, a third electronic switch and a current sense resistor coupled between the center of the inverter and the second input terminal, then as a first and a second with the primary winding gekop ⁇ pelte secondary inductor, wherein the first Sekundärin ⁇ productivity with the first output terminal and the two ⁇ te secondary inductance is coupled to the second output
  • Such a circuit arrangement is known from DE 103 45 610 Al and is shown to facilitate understanding ⁇ nisses in Fig. 1.
  • an intermediate circuit capacitor Cl Parallel to the DC voltage input of the half-bridge inverter Tl, T2 an intermediate circuit capacitor Cl is arranged with a comparatively large capacity.
  • the insects serves as a DC voltage source and provides the so-called intermediate-circuit voltage U Zw for the half-bridge inverter ready.
  • the intermediate circuit voltage U Zw is usually about 400 V and is from the Mains AC voltage generated by a mains voltage rectifier (not shown) and a boost converter (not shown).
  • the intermediate circuit capacitor Cl is arranged parallel to the voltage output of the boost converter.
  • To the output M of the half-bridge inverter designed as a series resonant circuit load ⁇ circuit is connected, which consists of the lamp inductor Ll and the ignition capacitor C2 substantially. Parallel to the ignition capacitor C2, the discharge path of the fluorescent lamp LP and the capacitor C3 are connected, the stand during lamp operation in the steady To ⁇ of the half-bridge inverter to half Ver ⁇ supply voltage of the half-bridge inverter originatedla ⁇ is the.
  • the lamp electrodes El, E2 of the fluorescent lamp LP are formed as electrode coils with two electrical connections. Parallel to the electric ⁇ denwendeln El, E2 each have a secondary winding Sil, SI2 of a transformer is connected, which is used for inductive heating of the electrode coils El, E2.
  • the primary winding Pl of this transformer is in series with the switching path of another field effect transistor T3, whose control electrode is also acted upon by the microcontroller MC with control signals, and a measuring ⁇ resistance Rl connected, wherein above the measuring resistor Rl a voltage Res decreases, with the reciprocal of the electrical resistance of a coil El, E2 of the discharge lamp LP is correlated.
  • the series circuit of the components Pl, T3 and Rl is connected to the output M of the half-bridge inverter.
  • a first terminal of the primary winding P1 is connected to the output or center tap M of the half-bridge inverter and to the lamp inductor L1, while the second te terminal of the primary winding Pl is connected to the field effect ⁇ transistor T3 and DC in the forward direction via a diode Dl with the high potential at ⁇ connection (+) of the intermediate circuit capacitor Cl.
  • a first terminal of the sensing resistor Rl is connected to the ground potential (-), while the second on ⁇ connection of the measuring resistor with the field effect transistor T3 and via a low-pass filter R2, C4 is connected to the voltage input A of the microcontroller MC.
  • the load circuit Ll, C2, LP applied in a known manner with a high frequency alternating voltage whose frequency by the switching cycle of the transistors Tl, T2 is determined and is in the range of about 50 kHz to about 150 kHz.
  • the transistor T3 is switched on and off by the microcontroller MC in synchronism with the transistor T1.
  • T3 During the turn-on of the transistors Tl, T3 therefore flows through the primary winding Pl and the measuring resistor Rl, a current. During the off of the transistors Tl, T3, the current flow through the measuring resistor R is interrupted un ⁇ .
  • the stored in the magnetic field of the primary winding Pl energy is supplied during the turn-off of the transistors Tl, T3 and the duty cycle of the transistor T2 via the diode Dl the DC link capacitor Cl. Due to the alternating switching transis- Tors T1, T2 and the synchronous to the transistor Tl switching transistor T3 flows through the primary winding Pl a high-frequency current, which induces corresponding heating currents for the electrode coils El, E2 in the secondary windings Sil, SI2.
  • the voltage drop across the measuring resistor Rl is averaged over a time interval of a plurality of switching cycles of the transistor T3 and supplied to the voltage input A of the microcontroller MC.
  • the input voltage at the terminal A of the microcontroller MC is converted into a digital signal by means of an analog-to-digital converter and evaluated in the microcontroller MC.
  • the microcontroller MC detects the voltage drop across the capacitor C4 the first time after about 30 ms after the start of the heating phase and the second time about 600 ms after the start of the heating phase. If the absolute value of the difference of the two voltage values exceeds a predetermined threshold value, the voltage value at the end of the heating phase is compared with a reference value stored in the microcontroller MC and used for identifying the lamp type. In this case, the voltage value, as he mentions ⁇ , correlated with the reciprocal of the coil resistance. If the absolute value of the difference between the two voltage values lies below the threshold value, the lamp is still operated with the current data record, ie no lamp type recognition is performed.
  • step 100 the known method starts. Subsequently ⁇ d whether the DC link voltage U Zw has reached its desired value U Zwso ii is checked in step 110. If this is not the case, in step 120 the DC link voltage U Zw is increased. If it is determined in step 110 that the intermediate circuit voltage has Zw reaches its desired value U Zwso ii U, in step 130 at a first time ⁇ point ti a first value Reslneu the correlated with the helical abutment ⁇ stands a filament of the fluorescent lamp LP voltage drop across the measuring resistor R and a two-th time instant t2, a second value Res2neu this clamping ⁇ voltage drop determined.
  • step 140 the difference (Reslnew - Res2new) is compared against a first threshold Sl. If the difference is above the threshold, an algorithm for lamp type detection is performed. This comprises the steps 150 to 230. Re sineu next in step 150 the absolute amount -1 against
  • Reslalt compared a threshold Xl wherein Res2neu represents the refreshes ⁇ ell measured value of the voltage drop at the measuring reflection ⁇ was Rl and Res2alt the value of the vorangegange-
  • the lamp is operated in step 160 with the current operating parameter set.
  • the new value Res2new differs very little from the old value Res2alt, so that the same lamp is unquestionably connected to the circuit arrangement. Therefore, it can be operated in step 160 unchanged with the current record.
  • step 180 the old value Res2old is overwritten by the new value Res2new.
  • the lamp is then in step 190 continues to be operated with the refreshes ⁇ economic record.
  • step 170 it is determined that the value Re is new
  • step 200 of the corresponding lamps ⁇ record is detected, the lamp is in step 210 with the detected lamp data i operated.
  • Res2alt is overwritten by Res2new. If no lamp data set ordered to the Res2 ref found in step 200, the lamp is operated in step 230 with a default data set.
  • step 140 If it is determined in step 140 that the difference between Reslnew and Res2new is below the threshold value Sl, it is checked in step 240 whether the difference (Reslnew - Res2new) is below a second threshold value S2, which is smaller than the threshold value S1. If this is the case, then in step 250 a dummy coil is assumed Bezie ⁇ hung, a coil short circuit. If a dummy coil can be excluded (it is recognizably a lamp used), then there is a coil short circuit and the circuit is switched off. If it is determined in step 240 that the difference between Reslnew and Res2new is greater than the threshold S2, the lamp will continue to operate in step 260 with the current record.
  • the present invention is based on the finding that in the procedure according to the prior art ⁇ nik therefore damage to the circuit arrangements, because this Although Wendelkurz Being with short Lei ⁇ lines, but not with long lines, as in the operation of multiple lights occur with a circuit arrangement, can recognize.
  • Spiral short circuits with long lines are characterized by the fact that the difference between the first measured value of the voltage drop across the measuring resistor and the second measured value of the voltage drop across the measuring resistor is greater than with a short-circuited short-circuit.
  • the threshold S2 would now for the detection of helix shorts with longer lines raised in step 240, this would, erroneous at a lamp whose coils due ei ⁇ nes preceding operation not yet completely cooled wa- ren to an erroneous detection of a coil short circuit, and a and thus cause unwanted shutdown of the circuit.
  • a further case distinction is larger than the threshold value S2, necessary since otherwise a back illuminated light would not be operated - is therefore in a further development of the prior art Inventive ⁇ provided according to determination that the difference (Res2neu Reslneu).
  • the present invention therefore provides that if it is determined in step 240 that the difference (Reslnew - Res2new) is greater than the threshold value S2, another case distinction is made: If Res2new is greater than a third threshold, with the third threshold being less than the first and greater than the second threshold, a coil short is detected. However, if Res2new is not greater than the third threshold, the lamp will continue to operate with the current operating parameter set. This measure takes into account that the value Res2neu switch at a re- ⁇ is small compared to the value Res2neu a short circuit with longer lines.
  • a preferred embodiment is characterized in that it comprises the following further steps: If the difference (Reslnew - Res2new) is smaller than the second threshold value, the following steps are carried out: If the second measured value lies between a fourth and a fifth threshold value, the fifth Threshold is less than the fourth threshold, the lamp type detection is locked. If the second reading is above the fourth threshold, a filament short is detected. If the second reading is below the fifth threshold, a dummy helix is detected.
  • the latching of the lamp type detection allows a lighting manufacturer to ensure the operation of an inserted lamp with a set of parameters that it has specified. For example, a luminaire manufacturer can design a luminaire for 50 W, thereby ensuring that even an 80-watt lamp used only operates like a 50-watt lamp. This allows in particular a weaker dimensioning of the performance-relevant elements of the luminaire.
  • a lock can be released again, for example, by using a dummy coil with a resistance of near zero.
  • a shutdown is performed, i. H. a shutdown of the circuitry to avoid damage to the circuitry.
  • information about the occurrence of a shutdown is generated, which facilitates troubleshooting.
  • first and / or the second threshold value are formed by the product of a factor a and the second value Res2new, where 0 ⁇ a ⁇ 2. This will be the first and the second
  • the third threshold value S3 is preferred by the product of a factor b to the fourth threshold S4 ge forms ⁇ is, with 0 ⁇ b ⁇ 1, wherein the fourth threshold S4 is greater than the lowest resistance caused by the helical second value Res2neu, and fifth threshold S5 is less than the fourth threshold.
  • Figure 1 is a schematic representation of a known from the prior art circuit arrangement.
  • FIG. 2 is a flow chart illustrating a method known in the art
  • FIG. 3 shows a flowchart for illustrating an embodiment of a method according to the invention
  • Fig. 4 shows the time course of the correlated with the reciprocal of the coil resistance, across the current measuring resistor Rl falling voltage Res in different situations.
  • step 280 when WUR determined in step 240 ⁇ de, that the difference (Reslneu - Res2neu) is greater than a second threshold value S2, wherein the second threshold is smaller than the first threshold Sl, made in step 270, a further case distinction : if it is determined that the value Res2neu is greater than a drit ⁇ ter threshold value S3, then in step 280 a helical is determined short, or when a Ver ⁇ Reset of the lamp type detection has been submitted according to steps 150 to 230, unlocks them. If it is determined in step 270 that Res2neu is not greater than the threshold value th drit ⁇ S3, so the lamp is operated at step 290 with the current operating parameter set.
  • step 240 If it is determined in step 240 that the difference (Reslneu - Res2neu) is smaller than the second threshold S2, a further case distinc ⁇ dung is made in step 300th In this case, it is checked whether the value Res2new is greater than a fourth threshold value S4. Will this be the affirmative, a short-circuit coil is provided in step 310 determines ⁇ , or when the lamp type detection ge ⁇ Gurss the steps 150 to 230 was locked, this bolted ⁇ ent.
  • step 300 if determined in step 300 that the value Res2neu is smaller than the fourth threshold S4, a further case distinc ⁇ dung is made in step 310th In this case, it is checked whether Res2new is greater than a fifth threshold value S5, the fifth threshold value being smaller than the fourth threshold value S4. If this is the case, the lamp type detection is locked according to steps 150 to 230 in step 320. If this is not the case, however, a dummy turn is assumed in step 330.
  • the algorithm of the method according to the invention is implemented in the microcontroller MC of FIG. This includes in particular the required storage and Ver ⁇ same devices.
  • Fig. 4 shows in further understanding the time course of the reciprocal of the coil resistance korre ⁇ profiled voltage drop Res across the current measuring resistor R for different situations: curve a) shows the chronological course, in the case of a dummy coil again, curve b) in the case of a coil short circuit at kur ⁇ zen lines, curve c) in the case of a coil short circuit with longer lines, curve d) in the case of intact filaments and curve e) upon reconnection switch, ie the coils were not cooled from the previous operation.
  • the present invention makes it possible to detect a short-circuit of the filament both for short (curve b) and for longer lines (curve c). It allows operation of the fluorescent lamp when switched on in the cooled state (curve d) and when switching ⁇ th in the not yet cooled state (curve e). Finally, an inserted dummy coil (curve a) is still reliably detected.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

La présente invention concerne un procédé pour faire fonctionner au moins une lampe à décharge (LP) avec un agencement de circuits équipé d'une entrée ayant un premier raccordement d'entrée et un deuxième raccordement d'entrée destinés à raccorder une tension d'alimentation continue (UZw) ; d'une sortie ayant au moins un premier raccordement de sortie et un deuxième raccordement de sortie destinés à raccorder la ou les lampes à décharge (LP) ; d'un onduleur ayant au moins un premier commutateur électronique (T1) et un deuxième commutateur électronique (T2), qui sont couplés en série entre les premier et deuxième raccordements d'entrée, un point central (M) de l'onduleur étant formé entre le premier commutateur (T1) et le deuxième commutateur (T2) ; d'un dispositif d'allumage, qui comporte une bobine de lampe (L1) et un condensateur de résonance (C2) ; d'un dispositif de préchauffage, qui comprend un montage en série d'une inductance primaire (P1), d'un troisième commutateur électronique (T3) et d'une résistance de mesure de courant (R1), le montage en série étant couplé entre le point central (M) de l'onduleur et le deuxième raccordement d'entrée, ainsi que des première (SI1) et deuxième (SI2) inductances secondaires couplées à l'enroulement primaire (P1), la première inductance secondaire (SI1) étant couplée au premier raccordement de sortie et la deuxième inductance secondaire (SI2) étant couplée au deuxième raccordement de sortie ; d'un dispositif de commande (MC) qui est couplé à la résistance de mesure de courant (R1) et dans lequel sont stockés des ensembles de paramètres de fonctionnement associés à au moins deux types différents de lampes à décharge, un ensemble de paramètres de fonctionnement représentant un ensemble de paramètres de fonctionnement actuel, le dispositif de commande (MC) étant conçu pour commander au moins le premier commutateur électronique (T1), le deuxième commutateur électronique (T2) et le troisième commutateur électronique (T3) selon l'ensemble de paramètres de fonctionnement actuel. Dans la phase de préchauffage, une première valeur (Res1neu) de la chute de tension aux bornes de la résistance de mesure de courant (R1), corrélée avec la valeur inverse de la résistance électrique d'au moins un filament spiralé (E1) de la ou des lampes à décharge (LP), est déterminée à un premier instant (t1) et une deuxième valeur (Res2neu) de la chute de tension aux bornes de la résistance de mesure de courant (R1), corrélée avec la valeur inverse de la résistance électrique du ou des filaments spiralés (E1) de la ou des lampes à décharge (LP), est déterminée à un deuxième instant (t2), le deuxième instant (t2) survenant après le premier instant (t1). Le procédé est caractérisé par les étapes consistant à : a) déterminer la différence entre les première (Res1neu) et deuxième (Res2neu) valeurs (étape 140) ; b) b1) si la différence est supérieure à une première valeur de seuil (S1) (étapes 150 à 230) : exécuter un algorithme pour détecter le type de lampe ; b2) si la différence n'est pas supérieure à la première valeur de seuil (S1) : c1) si la différence est supérieure à une deuxième valeur de seuil (S2), la deuxième valeur de seuil (S2) étant inférieure à la première valeur de seuil (S1) (étape 240) : d1) si la deuxième valeur est supérieure à une troisième valeur de seuil (S3) (étape 270) : diagnostiquer un court-circuit du filament (étape 280) ; d2) si la deuxième valeur n'est pas supérieure à la troisième valeur de seuil (S3) : faire fonctionner la lampe avec l'ensemble de paramètres de fonctionnement actuel (étape 290). L'invention concerne en outre un agencement de circuits correspondant, destiné à faire fonctionner au moins une lampe à décharge (LP).
EP08736581A 2008-04-25 2008-04-25 Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge Not-in-force EP2274960B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/055074 WO2009129860A1 (fr) 2008-04-25 2008-04-25 Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge

Publications (2)

Publication Number Publication Date
EP2274960A1 true EP2274960A1 (fr) 2011-01-19
EP2274960B1 EP2274960B1 (fr) 2013-02-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08736581A Not-in-force EP2274960B1 (fr) 2008-04-25 2008-04-25 Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge

Country Status (5)

Country Link
US (1) US8796941B2 (fr)
EP (1) EP2274960B1 (fr)
KR (1) KR20110007225A (fr)
CN (1) CN102017809B (fr)
WO (1) WO2009129860A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102017809B (zh) * 2008-04-25 2013-11-06 奥斯兰姆有限公司 用于驱动至少一个放电灯的方法和装置
EP3223588B1 (fr) * 2016-03-21 2020-04-08 Valeo Iluminacion Gestion de l'information bin dans un module lumineux pour véhicule automobile comprenant des sources lumineuses à élément semi-conducteur
KR102573957B1 (ko) 2021-02-26 2023-09-01 충남대학교산학협력단 공유 사물함 시스템

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Publication number Priority date Publication date Assignee Title
DE19850441A1 (de) * 1998-10-27 2000-05-11 Trilux Lenze Gmbh & Co Kg Verfahren und Vorschaltgerät zum Betrieb einer mit einer Leuchtstofflampe versehenen Leuchte
DE10345610A1 (de) 2003-09-29 2005-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben mindestens einer Niederdruckentladungslampe
DE102005006716A1 (de) 2004-02-04 2006-02-23 Revolux Gmbh Digitales EVG zum dimmbaren Betrieb von Leuchtstofflampen
DE102005013564A1 (de) * 2005-03-23 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung und Verfahren zum Betreiben mindestens einer Lampe
DE102005046482A1 (de) * 2005-09-28 2007-03-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zum Einstellen eines elektronischen Vorschaltgeräts
CN102017809B (zh) * 2008-04-25 2013-11-06 奥斯兰姆有限公司 用于驱动至少一个放电灯的方法和装置

Non-Patent Citations (1)

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Title
See references of WO2009129860A1 *

Also Published As

Publication number Publication date
US8796941B2 (en) 2014-08-05
CN102017809A (zh) 2011-04-13
CN102017809B (zh) 2013-11-06
EP2274960B1 (fr) 2013-02-27
WO2009129860A1 (fr) 2009-10-29
KR20110007225A (ko) 2011-01-21
US20110037393A1 (en) 2011-02-17

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