EP0422255B1 - Ballast électronique - Google Patents

Ballast électronique Download PDF

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Publication number
EP0422255B1
EP0422255B1 EP89118713A EP89118713A EP0422255B1 EP 0422255 B1 EP0422255 B1 EP 0422255B1 EP 89118713 A EP89118713 A EP 89118713A EP 89118713 A EP89118713 A EP 89118713A EP 0422255 B1 EP0422255 B1 EP 0422255B1
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EP
European Patent Office
Prior art keywords
voltage
fluorescent lamp
circuit
lamp
auxiliary
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.)
Expired - Lifetime
Application number
EP89118713A
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German (de)
English (en)
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EP0422255A1 (fr
Inventor
Jürgen Klier
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.)
Siemens AG
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Siemens AG
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
Priority to ES89118713T priority Critical patent/ES2049790T3/es
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP89118713A priority patent/EP0422255B1/fr
Priority to DE89118713T priority patent/DE58907133D1/de
Priority to AT89118713T priority patent/ATE102430T1/de
Priority to US07/592,125 priority patent/US5066894A/en
Priority to JP2269688A priority patent/JPH07101638B2/ja
Publication of EP0422255A1 publication Critical patent/EP0422255A1/fr
Application granted granted Critical
Publication of EP0422255B1 publication Critical patent/EP0422255B1/fr
Priority to HK123395A priority patent/HK123395A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B41/36—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 invention relates to an electronic ballast according to the preamble of claim 1.
  • Electronic ballasts of this type are known for example from DE-A1-3709004. If such an electronic ballast is to be used for dimming a fluorescent lamp within wide limits, particular difficulties arise when the positions are ⁇ 10% of the nominal luminous flux.
  • the fluorescent lamps have large tolerances with regard to their electrical properties, are sensitive to changes in temperature and are subject to signs of aging. There is therefore a risk that when the fluorescent lamp is dimmed to low values by tearing off the discharge, the fluorescent lamp goes out.
  • the controller regulates the brightness of the fluorescent lamp via its discharge current.
  • this principle fails at positions ⁇ 10% of the nominal luminous flux, since the differential current transformer required for this would have to be completely free of stray fields. In the 1% dimming position, a leakage flux of the residual current transformer of only 1% of the main flow would falsify the measurement result by approx. 100%.
  • a dimming circuit for high-pressure lamps is known from US-A-3,989,976.
  • this known circuit has an auxiliary control loop.
  • This auxiliary control loop detects a tendency for the lamp arc to go out due to the increasing alternating voltage of the high-pressure lamp.
  • the auxiliary control loop is designed in such a way that the increased alternating burning voltage which occurs during dimming is automatically compensated for by the fact that increased power is supplied to the lamp via the ballast. This is done in such a way that the normal control of the ballast, which is matched to the cycle of the AC line voltage, is deactivated in this critical operating state and the control is instead based on the output signal of a scanning circuit evaluating the lamp lamp voltage.
  • the invention is based on the object of specifying a solution for a dimmable electronic ballast of the type mentioned at the outset, regardless of whether use is made of a discharge current control or a power control of the fluorescent lamp, which, with little additional effort, ensures reliable dimming even at dimming positions below 10 % of the nominal luminous flux down to less than 1%.
  • the invention is based on the finding that when the fluorescent lamp is dimmed, the discharge current mainly changes, while the operating voltage - at least in terms of magnitude - remains the same. This means that the voltage-current ratio, that is, the resistance of the discharge gap with increasing brightness of the fluorescent lamp, becomes ever greater and finally tends towards infinity when the discharge stops.
  • a fluorescent lamp can thus still be operated safely at 1% of its nominal luminous flux if the discharge resistance is also monitored and the control variable derived from this in the sense of a correction of the control variable for the controller in the lower range the brightness control is used.
  • ballast can recognize whether the lamp is on without the need for optoelectronic devices or a differential current transformer for lamp current detection. This can be used, for example, in electronic ballasts provided for warm starts to control the preheating phase of the fluorescent lamp, since premature ignition of the fluorescent lamp can be detected and immediately switched from preheating to operation.
  • the dimmable electronic ballast shown partially in the form of a block diagram in FIG. 1 essentially consists of an inverter WR which is connected on the output side to a load circuit.
  • the load circuit consists of the series connection of a lamp inductor L1 with a fluorescent lamp LL, which is an ignition capacitor C2 in parallel.
  • the inverter WR uses a half-bridge circuit comprising two switches T1, T2, which are connected in series as power transistors, and a half-bridge capacitor C1, to which a discharge resistor R1 is connected in parallel.
  • the common connection point of half-bridge capacitor C1, discharge resistor R1 and one of the electrodes of the fluorescent lamp LL is denoted by A and the connection point of the other electrode to the lamp inductor L1 is denoted by B.
  • the switches T1 and T2 of the half-bridge circuit are controlled by an oscillator O, which in turn is connected via its control input to the output of a controller RR.
  • the control input of the controller RR is preceded by a summer SR having comparator properties, the three inputs of which are supplied with a setpoint SW, an actual value IW and an auxiliary control variable HMG.
  • the correct addition of the actual value IW, the setpoint SW and the auxiliary control variable HMG result in a variable for the control deviation RAG, which is fed from the output of the summer SR to the control input of the controller RR.
  • the setpoint value SW, the actual value IW and the auxiliary control variable HMG are DC voltages, which together result in the control deviation RAG, which also represents a DC voltage.
  • the power supply for the inverter WR usually takes the form of a DC voltage which is obtained from the AC line voltage and is indicated in FIG. 1 as an intermediate circuit DC voltage Uzw.
  • This DC link voltage is due to the series connection of the two switches T1 and T2.
  • the half-bridge capacitor C1 and the discharge resistor R1 are in turn connected to the positive pole of the DC link voltage Uzw.
  • the auxiliary control variable HMG is taken from the tap of a voltage divider formed from resistors R2 and R3, which in turn is connected from the connection point A to the negative pole of the DC link voltage Uzw.
  • the setpoint value SW representing a reference voltage is usually generated by a DC voltage which is adjustable in size and is not shown in FIG. 1 and the other figures.
  • the actual value IW which also represents a DC voltage, is either proportional to the discharge current flowing through the fluorescent lamp LL or else to the lamp power. It can be obtained in a known manner via a differential current transformer or via a current-voltage measurement in the area of the load circuit. The circuitry of such an actual value detection is also omitted in FIG. 1, as in the other figures.
  • half the DC link voltage Uzw is set at the connection point B when the fluorescent lamp LL is lit, superimposed by the alternating voltage of the fluorescent lamp LL.
  • the half-bridge capacitor C1 and the discharge resistor R1 lying parallel to it are usually so large that half the DC link voltage Uzw also occurs at the nominal luminous flux of the fluorescent lamp at the connection point A.
  • the discharge resistor R1 is substantially larger than the discharge resistor of the fluorescent lamp, so that the discharge of the half-bridge capacitor C1 caused by the discharge resistor R1 can be practically neglected.
  • the high-frequency lamp current causes only a small voltage drop across the half-bridge capacitor C1.
  • the discharge resistance of the fluorescent lamp LL becomes so great that the discharge resistor R1 can partially discharge the half-bridge capacitor C1.
  • the potential at connection point A and the auxiliary control variable HMG divided down via voltage divider R2 / R3 at the tap of this voltage divider also increase.
  • the auxiliary control variable HMG thus counteracts a further reduction in the lamp power and prevents the unwanted tearing off of the discharge via the controller RR.
  • the described change in the auxiliary control variable HMG has a noticeable effect only in the immediate vicinity of the lower limit of the brightness control range of the fluorescent lamp LL, because only in this range does the discharge resistance of the fluorescent lamp and thus also the potential at the connection point A increase significantly.
  • This type of derivation of the auxiliary control variable HMG from the size of the discharge resistance of the fluorescent lamp LL by means of a DC voltage measurement presupposes that no rectifier effects per se occur in the fluorescent lamp.
  • Such a rectifier effect can occur, for example, if there are large differences in the emissivity of the electrodes of the fluorescent lamp LL. If the dependency of the DC voltage measurement and thus the generation of the auxiliary control variable HMG on such a rectifier effect is to be excluded, then the auxiliary control variable HMG can also be derived from an AC voltage.
  • a corresponding exemplary embodiment is shown in FIG. 2.
  • the auxiliary control variable HMG is derived by superimposing a low-frequency AC voltage on the fluorescent lamp LL with the high-frequency burning AC voltage.
  • the light-bulb lamp LL is additionally connected to the AC line voltage Un via coupling elements KE1, for example in the form of coupling resistors Rk.
  • the low-frequency component of the AC combustion voltage thus occurring on the fluorescent lamp LL is then fed via further coupling elements KE2, which block the high-frequency component of the AC combustion voltage and also the DC component, to a rectifier GL, which is followed by a filter element SG for smoothing the rectified, low-frequency component of the AC combustion voltage.
  • the voltage divider R2 / R3, which is already known from FIG. 1, is connected in parallel to the output of the filter element SG, and the auxiliary control variable HMG is present at its tap.
  • the coupling elements KE2 consist of the series connection of a filter choke Ls and a filter capacitor Cs.
  • a threshold for example in the form of an additional threshold, can be added to the connection path of the tap of the voltage divider R2 / R3 to the summer SR, as shown in FIG. 3 a Zener diode D1. Only when the auxiliary control variable HMG at the tap of the voltage divider R2 / R3 with a dimming position of, for example, one or two percent of the nominal luminous flux has become so large that the zener diode becomes low-resistance does the additional regulation prevent the discharge from breaking off. The behavior of the controller in The brightness control range above this threshold is then, which is sometimes desirable, not influenced by this additional control.
  • the Zener diode D1 is entered in the circuit diagram of FIG. 3.
  • the circuit according to FIG. 3 represents a further development of the circuit according to FIG. 1.
  • the circuit according to FIG. 3 differs from the circuit according to FIG. 1 an additional circuit ZS.
  • a further auxiliary control variable HMG1 is generated via this additional circuit ZS, which is superimposed on the auxiliary control variable HMG with the same effect. As a result, the control speed of the additional control is significantly increased.
  • the change in the discharge resistance during a dimming process of the fluorescent lamp LL in the direction of decreasing brightness results in a relatively slow change in the potential at the connection point A, because a large time constant of the half-bridge capacitor C1 and the discharge resistor R1 is predetermined by the overall circuit. If the dimensions are unfavorable, control vibrations can occur. However, the dynamic behavior of the controller can be significantly improved by the additional circuit ZS because the influence of this large time constant can be reduced. If the lamp power is greatly reduced to values below 10% of the nominal power, the alternating voltage of the fluorescent lamp LL decreases with the lamp power.
  • the additional circuit ZS takes advantage of this by generating a DC voltage from the AC combustion voltage which is proportional to the AC combustion voltage and is superimposed on the auxiliary control variable HMG with the correct sign in the sense of the desired regulation as a further auxiliary control variable HMG1.
  • FIG. 4 A preferred embodiment of the additional circuit ZS according to FIG. 3 is shown in FIG. 4. It consists between the connection point B and the negative pole of the DC link voltage Uzw from the series connection of the capacitor C3 with a voltage divider R4 / R5 formed from resistors R4 and R5.
  • the divided portion of the AC combustion voltage across the resistor R5 is now rectified via a diode D2 and the rectified AC combustion voltage is fed to the parallel circuit comprising a capacitor C4 and a resistor R6.
  • the change in the rectified AC combustion voltage takes effect on the capacitor C4 and is fed via the capacitor C5 to the resistor R3 of the voltage divider R2 / R3 as the further auxiliary control variable HMG1.

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  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Glass Compositions (AREA)
  • Furan Compounds (AREA)
  • Organic Insulating Materials (AREA)
  • Discharge Heating (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Claims (9)

  1. Ballast électronique comportant un onduleur (W1) réalisé selon un montage en pont d'interrupteurs et auquel est raccordé, côté sortie, au moins un circuit de charge, qui possède une self (L1) d'une lampe et un montage parallèle formé d'une lampe fluorescente (LL) et d'un condensateur d'amorçage (C2) et branché en série avec la self de la lampe, et un dispositif de régulation (SR, RR), qui commande l'onduleur et qui, en fonction d'une valeur réelle (IW), qui est dérivée d'une valeur instantanée mesurée de la puissance de la lampe ou du courant de la lampe, ainsi qu'en fonction d'une valeur de consigne correspondante (SW), qui est rapportée à la puissance ou au courant de la lampe et dont l'amplitude est réglable, à l'aide d'une comparaison valeur de consigne - valeur réelle et d'un écart de régulation (REG), qui en résulte, permet un fonctionnement permanent avec une luminosité stabilisée ainsi qu'une régulation de la luminosité de la lampe fluorescente, caractérisé par le fait qu'il est prévu un circuit de mesure auxiliaire (Uzw, R1, R2, R3 ou Un, KE1, KE2, R2, R3) pour mesurer la résistance instantanée de décharge de la lampe fluorescente et qui obtient, à partir de cette résistance de décharge qui augmente lorsque la luminosité de la lampe fluorescente diminue, une grandeur de régulation auxiliaire (HMG), qui est superposée à l'écart de régulation dans le dispositif de régulation.
  2. Ballast électronique suivant la revendication 1, caractérisé par le fait que le dispositif de régulation (SR, RR) possède, en dehors d'un régulateur (RR) commandant l'onduleur (WR), un additionneur (SR), auquel sont envoyées la valeur réelle (IW) et la grandeur de régulation auxiliaire (HMG) sous la forme de tensions continues et qui, en additionnant ces tensions continues de façon correcte du point de vue des signes, forme en tant que tension de sortie l'écart de régulation superposé (RHG), qui est envoyé au régulateur en tant que grandeur de régulation.
  3. Ballast électronique suivant la revendication 1 ou 2, dans lequel l'onduleur (WR) comporte deux interrupteurs commandés (T1, T2) branchés en série et dont le point de jonction commun forme la sortie de l'onduleur et est raccordé, par l'intermédiaire de la self (L1) de la lampe, à une électrode de la lampe fluorescente (LL), et dans lequel ce montage série des interrupteurs commandés est raccordé à une tension continue (Uzw) du circuit intermédiaire, qui forme l'alimentation en courant de l'onduleur et est dérivée d'une tension alternative (Un) du secteur et, dans lequel un pôle de ce montage série des interrupteurs commandés est raccordé par l'intermédiaire d'un condensateur de demi-pont (C1) à la seconde électrode de la lampe fluorescente (LL), caractérisé par le fait que le circuit de mesure auxiliaire (Uzw, R1, R2, R3) comprend une résistance de décharge (R1), qui est branchée en parallèle avec le condensateur de demi-pont (C1), ainsi qu'un diviseur de tension (R2/R3), qui est formé par deux autres résistances (R2 ou R3) et qui, d'une part, est raccordé à l'électrode, reliée au condensateur de demi-pont, de la lampe fluorescente et par conséquent, par l'intermédiaire de ce condensateur, à un pôle (+) de la tension du circuit intermédiaire, et qui, d'autre part, est reliée directement à l'autre pôle (-) de la tension du circuit intermédiaire et possède une prise médiane qui forme la sortie du circuit de mesure auxiliaire et qui est raccordée à l'entrée du dispositif de régulation (SR, RR).
  4. Ballast électronique suivant la revendication 3, caractérisé par le fait qu'entre l'électrode de la lampe fluorescente (LL), qui est raccordée par l'intermédiaire d'un point de jonction commun (B) à la self (L1) de la lampe, et l'autre pôle (-) de la tension continue (Uzw) du circuit intermédiaire est prévu un circuit supplémentaire (ZS) servant à former une autre grandeur de régulation auxiliaire (HMG1), qui est obtenue sous la forme d'une tension continue à partir de la tension alternative de fonctionnement de la lampe fluorescente et est appliquée à la grandeur de régulation auxiliaire (HMG) obtenue à partir de la résistance de décharge de la lampe fluorescente, au niveau de la prise médiane du diviseur de tension (R2/R3) de sorte qu'en étant superposée à cette grandeur de régulation auxiliaire dérivée de la résistance de décharge de la lampe fluorescente, elle assiste en la renforçant la variation de tension de cette grandeur de régulation auxiliaire dans la plage inférieure de régulation de la luminosité.
  5. Ballast électronique suivant la revendication 4, caractérisé par le fait que le circuit supplémentaire (ZS) servant à mesurer la tension alternative de fonctionnement de la lampe fluorescente (LN) possède un circuit série constitué par un autre condensateur (C3) ainsi que par deux autres résistances (R4, R5), qui forment également un diviseur de tension, ce circuit série étant disposé entre le point de jonction (B) de la self (L1) de la lampe et l'électrode associée de la lampe fluorescente, et l'autre pôle (-) de la tension continue (Uzw) du circuit intermédiaire, qu'en outre entre une prise médiane de ce diviseur de tension (R4/R5) du circuit supplémentaire et l'autre pôle (-) de la tension continue du circuit intermédiaire est branché, en parallèle avec la résistance correspondante (R5) de ce diviseur de tension, un quadripôle π comportant des circuits transversaux, qui sont constitués par le montage en parallèle d'un autre condensateur (C4) et d'une autre résistance (R6), et comportant des circuits longitudinaux qui sont formés par un montage série constitué par une diode (D2) raccordée à la prise médiane du diviseur de tension (R4/R5) et par un autre condensateur (C5), ce quadripôle π redressant et filtrant une tension partielle prélevée sur la prise médiane du diviseur de tension du circuit supplémentaire et proportionnel à la tension alternative de fonctionnement de la lampe fluorescente, et délivrant cette tension en tant qu'autre grandeur de régulation auxiliaire (HMG1), dérivée de la tension alternative de fonctionnement, sur la borne libre du condensateur (C5) du circuit longitudinal.
  6. Ballast électronique suivant l'une des revendications précédentes, caractérisé par le fait que la valeur de la résistance de décharge (R1) branchée en parallèle avec le condensateur de demi-pont (C1) est dimensionnée avec un ordre de grandeur correspondant à la valeur de la résistance de décharge de la lampe fluorescente (LL), qui apparaît au niveau de la limite inférieure de la plage de réglage de luminosité.
  7. Ballast électronique suivant la revendication 1 ou 2, caractérisé par le fait que le circuit de mesure auxiliaire (Un, KE1, KE2) servant à délivrer la grandeur de régulation auxiliaire (HMG) dérivée de la résistance de décharge de la lampe fluorescente (LL), est alimenté par une tension alternative à basse fréquence (Un), comprend des premiers circuits de couplage (KE1) servant à superposer à cette tension alternative à basse fréquence la tension alternative à haute fréquence de fonctionnement de la lampe fluorescente, et des seconds circuits de couplage (KE2) servant à lisser un signal de tension alternative à basse fréquence correspondant, ainsi qu'un circuit redresseur (GL) servant à redresser ce signal lissé de tension alternative et qu'à ce circuit redresseur équipé de ses deux résistances est raccordé le diviseur de tension (R2/R3), qui délivre la grandeur de régulation auxiliaire sur sa prise médiane, du circuit de mesure auxiliaire.
  8. Ballast électronique suivant la revendication 7, caractérisé par le fait qu'on utilise comme tension alternative à basse fréquence la tension alternative (Un) du secteur, qui est envoyée directement aux électrodes de la lampe fluoresente (LL) par l'intermédiaire des premiers circuits de couplage (KE1), que les seconds circuits de couplage (KE2), qui bloquent la composante à haute fréquence de la tension alternative de fonctionnement ainsi qu'une partie de la tension continue, sont raccordés respectivement à l'une des électrodes de la lampe fluorescente, et qu'entre le circuit redresseur (GL) et le diviseur de tension (R2/R3) du circuit de mesure auxiliaire est prévu un circuit de lissage (SG) servant à lisser le signal de tension alternative redressé à haute fréquence.
  9. Ballast électronique suivant l'une des revendications précédentes, caractérisé par le fait que le circuit de mesure auxiliaire (Uzw, R1, R2, R3 ou Un, KE1, KE2, R2, R3) possède, à sa sortie, un circuit à valeur de seuil (D1), qui bloque cette sortie jusqu'à ce que la grandeur de mesure auxiliaire (HMG), dérivée de la résistance de décharge de la lampe fluorescente (LL), dépasse une valeur de seuil prédéterminée.
EP89118713A 1989-10-09 1989-10-09 Ballast électronique Expired - Lifetime EP0422255B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP89118713A EP0422255B1 (fr) 1989-10-09 1989-10-09 Ballast électronique
DE89118713T DE58907133D1 (de) 1989-10-09 1989-10-09 Elektronisches Vorschaltgerät.
AT89118713T ATE102430T1 (de) 1989-10-09 1989-10-09 Elektronisches vorschaltgeraet.
ES89118713T ES2049790T3 (es) 1989-10-09 1989-10-09 Adaptador electronico.
US07/592,125 US5066894A (en) 1989-10-09 1990-10-03 Electronic ballast
JP2269688A JPH07101638B2 (ja) 1989-10-09 1990-10-09 スイツチブリツジとして構成されたインバータを有する電子式補助スイツチング装置
HK123395A HK123395A (en) 1989-10-09 1995-07-27 Electronic ballast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89118713A EP0422255B1 (fr) 1989-10-09 1989-10-09 Ballast électronique

Publications (2)

Publication Number Publication Date
EP0422255A1 EP0422255A1 (fr) 1991-04-17
EP0422255B1 true EP0422255B1 (fr) 1994-03-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118713A Expired - Lifetime EP0422255B1 (fr) 1989-10-09 1989-10-09 Ballast électronique

Country Status (7)

Country Link
US (1) US5066894A (fr)
EP (1) EP0422255B1 (fr)
JP (1) JPH07101638B2 (fr)
AT (1) ATE102430T1 (fr)
DE (1) DE58907133D1 (fr)
ES (1) ES2049790T3 (fr)
HK (1) HK123395A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1395096A2 (fr) 2002-08-30 2004-03-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Procédé de commande de lampes fluorescentes
DE102011082245B3 (de) * 2011-09-07 2013-01-17 Osram Ag Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer Entladungslampe
DE102011082239B3 (de) * 2011-09-07 2013-01-17 Osram Ag Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer Entladungslampe
US8878462B2 (en) 2010-07-12 2014-11-04 Osram Gesellschaft Mit Beschraenkter Haftung Circuit arrangement and method for operating at least one discharge lamp

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US5369339A (en) * 1991-12-16 1994-11-29 U.S. Philips Corporation Circuit arrangement for reducing striations in a low-pressure mercury discharge lamp
DE4340604A1 (de) * 1993-08-25 1995-03-02 Tridonic Bauelemente Ges Mbh Elektronisches Vorschaltgerät zum Versorgen einer Last, beispielsweise einer Lampe
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DE19708783C1 (de) * 1997-03-04 1998-10-08 Tridonic Bauelemente Verfahren und Vorrichtung zum Regeln des Betriebsverhaltens von Gasentladungslampen
DE19714416A1 (de) * 1997-04-08 1998-10-15 Kbl Solarien Gmbh Verfahren und Schaltungsanordnung zum Betreiben eines elektrischen Leuchtmittels, insbesondere einer Gasentladungslampe, z.B. einer UV-Niederdruckröhre
US5770925A (en) * 1997-05-30 1998-06-23 Motorola Inc. Electronic ballast with inverter protection and relamping circuits
DE19928042A1 (de) * 1999-06-18 2000-12-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben mindestens einer Leuchtstofflampe sowie elektronisches Vorschaltgerät dafür
DE10018860A1 (de) * 2000-04-14 2001-10-18 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Stabilisierung des Betriebs von Gasentladungslampen
DE10306347A1 (de) * 2003-02-15 2004-08-26 Hüttinger Elektronik GmbH & Co. KG Leistungszufuhrregeleinheit
DE102005013308A1 (de) 2005-03-22 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorschaltgerät mit einer Dimmvorrichtung
DE102005013309A1 (de) 2005-03-22 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorschaltgerät mit Dimmvorrichtung
EP1720195B1 (fr) * 2005-05-06 2012-12-12 HÜTTINGER Elektronik GmbH + Co. KG Système pour la suppression d'arcs
DE102005021595A1 (de) * 2005-05-10 2006-11-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elekronisches Vorschaltgerät und entsprechendes Einstellverfahren
JPWO2007074724A1 (ja) * 2005-12-26 2009-06-04 日本電気株式会社 電源回路及び照明システム
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EP1395096A2 (fr) 2002-08-30 2004-03-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Procédé de commande de lampes fluorescentes
US8878462B2 (en) 2010-07-12 2014-11-04 Osram Gesellschaft Mit Beschraenkter Haftung Circuit arrangement and method for operating at least one discharge lamp
DE102011082245B3 (de) * 2011-09-07 2013-01-17 Osram Ag Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer Entladungslampe
DE102011082239B3 (de) * 2011-09-07 2013-01-17 Osram Ag Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer Entladungslampe
WO2013034387A1 (fr) 2011-09-07 2013-03-14 Osram Ag Ballast électronique et procédé pour faire fonctionner une lampe à décharge
WO2013034386A1 (fr) 2011-09-07 2013-03-14 Osram Ag Ballast électronique et procédé pour faire fonctionner une lampe à décharge

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ES2049790T3 (es) 1994-05-01
US5066894A (en) 1991-11-19
JPH03138896A (ja) 1991-06-13
ATE102430T1 (de) 1994-03-15
DE58907133D1 (de) 1994-04-07
JPH07101638B2 (ja) 1995-11-01
HK123395A (en) 1995-08-04
EP0422255A1 (fr) 1991-04-17

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