EP1938670B1 - Ballaste electronique et procede pour faire fonctionner une lampe electrique - Google Patents

Ballaste electronique et procede pour faire fonctionner une lampe electrique Download PDF

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Publication number
EP1938670B1
EP1938670B1 EP06807224A EP06807224A EP1938670B1 EP 1938670 B1 EP1938670 B1 EP 1938670B1 EP 06807224 A EP06807224 A EP 06807224A EP 06807224 A EP06807224 A EP 06807224A EP 1938670 B1 EP1938670 B1 EP 1938670B1
Authority
EP
European Patent Office
Prior art keywords
lamp
heating
circuit
electric lamp
operating
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
EP06807224A
Other languages
German (de)
English (en)
Other versions
EP1938670B8 (fr
EP1938670A1 (fr
Inventor
Kay Schmidtmann
Bernhard Schemmel
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
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Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP1938670A1 publication Critical patent/EP1938670A1/fr
Application granted granted Critical
Publication of EP1938670B1 publication Critical patent/EP1938670B1/fr
Publication of EP1938670B8 publication Critical patent/EP1938670B8/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to an electronic ballast for operating an electric lamp, which has a first and a second lamp filament, wherein the lamp filaments for heating during a preheating phase of the electric lamp are electrically connected to a heating circuit of the electronic ballast.
  • the invention also relates to a method for operating an electric lamp with such an electronic ballast.
  • Electric lamps are known in various designs and types. Thus, a variety of different electronic ballasts are also known due to this diversity.
  • An electronic operating device which has a heating circuit with a heating transformer, and the heating circuit can adjust the preheating.
  • An already known electric lamp is the amalgam fluorescent lamp.
  • This has an advantage in that over a wide temperature range, the luminous flux is over 90%.
  • This positive effect of the amalgam fluorescent lamps which can occur more or less depending on the structure of this lamp, can be greatly reduced by a heating circuit for heating the lamp filaments of this lamp in an operating phase.
  • This heating circuit is arranged in the electronic ballast with which the corresponding electric lamp is operated.
  • switchable heating circuits are known during the operating phase, which, however, can only be realized by a very complex and therefore cost-intensive solution.
  • the present invention is therefore based on the object to provide an electronic ballast, in which the negative influence of a heating circuit for heating lamp filaments of an electric lamp in the operating phase of the electric lamp can be at least reduced.
  • it is an object to at least be able to reduce the abovementioned disadvantage in the case of amalgam fluorescent lamps.
  • An inventive ballast for operating an electric lamp comprises a heating circuit which is designed for heating lamp filaments of the electric lamp during a preheating phase.
  • the lamp filaments are electrically connected to the heating circuit.
  • An essential concept of the invention is that the heating circuit is designed such that the heating current generated by this heating circuit in an operating phase of the electric lamp by changing the resonance excitation of a resonant circuit which is part of the heating circuit, with a value between 20% and 60% the lamp current of the electric lamp is dimensioned.
  • the operating phase follows in time the preheating phase and the ignition of the electric lamp.
  • the heating circuit during the operating phase of the electrical Turn off the lamp completely and therefore it is no longer necessary to provide a complex circuit design for it.
  • the heating circuit is designed such that it has a resonance state in a preheating phase, which ensures higher heating currents, wherein the high heating currents are reduced in an operating phase. The heating circuit then no longer has a resonance state in the operating phase.
  • the heating current generated by the heating circuit in the operating phase of the electric lamp with a value between 33% and 53% of the lamp current of the electric lamp can be dimensioned.
  • the adjustable in the operating phase value is between 37% and 48% of the lamp current of the electric lamp.
  • the heating circuit advantageously has a first inductance as a lamp inductor and a first and a second auxiliary inductance, wherein the first additional inductance is electrically connected to a first end of the first lamp filament and the second additional inductance is electrically connected to a first end of the second lamp filament.
  • a resonance circuit is connected at least between the first additional inductance and the first end of the first lamp filament.
  • the resonant circuit essentially has a resonance state in the case of operating conditions to be set in a preheating phase of the electric lamp.
  • the resonance circuit has to be set operating conditions in the operating phase of the electric lamp on a different from the preheating phase operating state.
  • the resonance circuit has a non-resonance state. This means that only in the preheating phase due to the resonant state reached there, a maximum heating current can be delivered to the lamp filaments.
  • the resonance circuit During the transition from the preheating phase into the operating phase, in which the operating frequency, which can be greater than 70 kHz in the preheating phase, is reduced to a lower value, then the resonance circuit also assumes an operating state which is far from the resonance state. As a result, the output to the lamp filaments heating current is significantly reduced.
  • the operating conditions to be set designate and include the operating conditions and settings required during the preheat phase and phase of operation for proper and safe operation.
  • the resonance circuit and thus the entire heating circuit is out of resonance and the influence on the luminous flux of the electric lamp at high temperatures in the operating phase can be significantly reduced, even prevented in the optimal case.
  • the resonant circuit preferably comprises a heating inductor and a heating capacitor which are connected in series. It is preferred if the resonance circuit is designed such that in each case a series circuit of a heating inductance and a heating capacitor is connected between the two additional inductances and the corresponding ends of the lamp filaments. In a quasi-symmetrical configuration, a series connection of a heating capacitor and a heating inductor are thus connected in each case at the first ends of the lamp filaments.
  • the heating circuit can thus be tuned in an effective manner in a preheat phase and in an operating phase.
  • the electric lamp is designed as an amalgam fluorescent lamp.
  • the very positive amalgam eflect (approximately 90% of the luminous flux over a wide temperature range) can be used optimally here and the negative influence of the heating circuit in the operating phase can be significantly reduced.
  • a method for operating an electric lamp with an electronic ballast which has a heating circuit for heating at least one lamp filament of the electric lamp, the heating current of the heating circuit during a phase of operation of the electric lamp to a value between 20% and 60% of the lamp current the electric lamp is set.
  • Advantageous embodiments of the electronic ballast are, insofar as transferable, to be regarded as advantageous embodiments of the method according to the invention.
  • FIG. 1 is an inventive electronic ballast 1 for operating an electric lamp 2, which is formed in the embodiment as amalgam luminescent lamp shown.
  • the electric lamp 2 has a first lamp filament 21 and a second lamp filament 22. Both the first lamp filament 21 and the second lamp filament 22 each include a first end 21 a and 22 a and a second end 21 b and 22 b.
  • the electronic ballast 1 has a heating circuit 3 for heating the two lamp filaments 21 and 22 during a preheating phase of the electric lamp 2.
  • the heating circuit 3 is electrically connected to both the first lamp filament 21 and the second lamp filament 22.
  • the heating circuit 3 comprises a lamp inductor, which is designed as a first inductor 30.
  • This inductor 30 is electrically connected to a first circuit node S1.
  • the heating circuit 3 comprises a first additional inductance 31 a and a second additional inductance 31 b.
  • the first additional inductance 31a is also connected to the first circuit node S1.
  • the first additional inductance 31 a is connected in a circuit branch, which is electrically contacted with the first end 21 a of the first lamp coil 21.
  • the second additional inductance 31 b is connected to a second circuit node S2 and connected in a circuit branch, which is electrically contacted with the first end 22a of the second lamp filament 22.
  • the heating circuit 3 comprises a resonance circuit 32a and 32b, wherein the resonance circuit 32a is connected between the first auxiliary inductance 31a and the first end 21a of the first lamp filament 21.
  • the resonant circuit 32a comprises a heating inductor 321a and a series-connected heating capacitor 322a.
  • a corresponding resonance circuit 32b is connected between the second additional inductance 31b and the first end 22a of the second lamp filament 22, which likewise has a heating inductor 321b and a heating capacitor 322b in a series connection.
  • the circuits 32a and 32b are to be considered as a single common resonant circuit.
  • a resonance capacitor 4 with the second end 21 b of the first lamp coil 21 is electrically contacted.
  • a coupling capacitor 5 is electrically connected to the resonance capacitor 4 on the one hand and to the second circuit node S2 on the other hand.
  • the voltage is supplied via the intermediate circuit voltage U ZW .
  • the circuit shown is merely exemplary and can be configured in many ways in order to achieve the reduction of the heating current in the operating phase compared to the preheating.
  • the resonant circuits 32a and 32b are Parameters of the components 321a, 322a and 321b, 322b designed so that in the preheat phase of the electric lamp, a resonance state is set and thus the heating circuit 3 is substantially in a resonant state. It can thereby be achieved that a very high heating current can be delivered to the two lamp filaments 21 and 22.
  • the heating circuit 3 is designed such that during this phase of operation, the heating current generated by this heating circuit 3 has a value which is proportionately between 20% and 60% of the lamp current of the electric lamp 2. This value is preferably between 33% and 53% of the lamp current. In a further advantageous embodiment, this value can be between 37% and 48% of the lamp current, whereby a further improvement can be achieved at each interval to the effect that a very high luminous flux can be provided over a wide temperature range.
  • FIG. 2 is shown in a schematic manner the dependence of the luminous flux of the embodiment formed as an amalgam fluorescent lamp electric lamp 2 as a function of temperature.
  • the luminous flux at relatively high temperatures in a configuration with a turned-off heating or switched off heating circuit 3 (solid line) in the operating phase of the electric lamp 2 is substantially gleichver founded with a luminous flux curve according to the invention (dashed curve ), during which during the operating phase of the electric lamp 2, a reduction of the heating current a corresponding fraction of the lamp current is performed.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (7)

  1. Ballast électronique pour faire fonctionner une lampe électrique (2) qui comporte un premier filament de lampe (21) et un deuxième filament de lampe (22), les filaments de lampe (21, 22) étant, pour chauffer, reliés électriquement à un circuit de chauffage (3), comportant:
    - un circuit de chauffage (3) qui comporte une première inductance additionnelle (31a) et une deuxième inductance additionnelle (31b) ainsi qu'au moins un circuit de résonance (32a, 32b) ;
    - la première inductance additionnelle (31a) étant reliée électriquement à une première extrémité (21a) du premier filament de lampe (21) et la deuxième inductance additionnelle (31b) étant reliée électriquement à une première extrémité (22a) du deuxième filament de lampe (22) ;
    - le circuit de chauffage (3) étant réalisé de manière telle que le courant de chauffage généré par ce circuit de chauffage (3) dans une phase de fonctionnement de la lampe électrique (2) peut être dimensionné avec une valeur comprise entre 20 % et 60 % du courant de lampe de la lampe électrique (2) ;
    caractérisé en ce que
    - le ballast électronique est réalisé pour faire fonctionner une lampe fluorescente à amalgame;
    - le circuit de résonance (32a) est monté au moins entre la première inductance additionnelle (31a) et la première extrémité (22a) du premier filament de lampe (21) ; et
    - le courant de chauffage peut être dimensionné via l'excitation du circuit de résonance.
  2. Ballast électronique selon la revendication 1,
    caractérisé en ce que
    le courant de chauffage généré par le circuit de chauffage (3) dans la phase de fonctionnement de la lampe électrique (2) peut être dimensionné avec une valeur comprise entre 33 % et 53 % du courant de lampe de la lampe électrique (2).
  3. Ballast électronique selon la revendication 1 ou 2, caractérisé en ce que
    le courant de chauffage généré par le circuit de chauffage (3) dans la phase de fonctionnement de la lampe électrique (2) peut être dimensionné avec une valeur comprise entre 37 % et 48 % du courant de lampe de la lampe électrique (2).
  4. Ballast électronique selon l'une des revendications précédentes,
    caractérisé en ce que
    le circuit de résonance (32a ; 32b), dans des conditions de fonctionnement à régler, présente, dans une phase de préchauffage du fonctionnement de la lampe électrique (2), pour l'essentiel un état de résonance.
  5. Ballast électronique selon la revendication 4,
    caractérisé en ce que
    le circuit de résonance (32a ; 32b), dans des conditions de fonctionnement à régler, présente, dans la phase de fonctionnement de la lampe électrique (2), un état qui est différent de l'état à la phase de préchauffage.
  6. Ballast électronique selon l'une des revendications 4 à 5, caractérisé en ce que
    le circuit de résonance (32a ; 32b) comporte au moins une inductance de chauffage (321a ; 321b) et un condensateur de chauffage (322a ; 322b) qui sont montés en série.
  7. Ballast électronique selon l'une des revendications 4 à 6, caractérisé en ce que
    le circuit de résonance (32a ; 32b) est réalisé de manière telle qu'est respectivement monté, entre les deux inductances additionnelles (31a ; 31b) et les extrémités correspondantes (21a ; 22a) des filaments de lampe (21, 22), un montage en série composé d'une inductance de chauffage (321a ; 321b) et d'un condensateur de chauffage (322a ; 322b).
EP06807224A 2005-10-17 2006-10-12 Ballaste electronique et procede pour faire fonctionner une lampe electrique Not-in-force EP1938670B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005049583A DE102005049583A1 (de) 2005-10-17 2005-10-17 Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer elektrischen Lampe
PCT/EP2006/067359 WO2007045604A1 (fr) 2005-10-17 2006-10-12 Ballast electronique et procede pour faire fonctionner une lampe electrique

Publications (3)

Publication Number Publication Date
EP1938670A1 EP1938670A1 (fr) 2008-07-02
EP1938670B1 true EP1938670B1 (fr) 2011-08-10
EP1938670B8 EP1938670B8 (fr) 2012-02-08

Family

ID=37594907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807224A Not-in-force EP1938670B8 (fr) 2005-10-17 2006-10-12 Ballaste electronique et procede pour faire fonctionner une lampe electrique

Country Status (8)

Country Link
US (1) US7863830B2 (fr)
EP (1) EP1938670B8 (fr)
KR (1) KR101313130B1 (fr)
CN (1) CN101288346B (fr)
AT (1) ATE520287T1 (fr)
CA (1) CA2625335A1 (fr)
DE (1) DE102005049583A1 (fr)
WO (1) WO2007045604A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8212489B2 (en) * 2007-01-17 2012-07-03 Osram Ag Circuit arrangement and method for starting and operating one or more discharge lamps
DE102008021351A1 (de) * 2008-04-29 2009-11-05 Osram Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben einer Entladungslampe sowie Beleuchtungssystem mit einer Entladungslampe
US8564201B2 (en) * 2010-11-05 2013-10-22 Nxp B.V. Amalgam-based fluorescent lamp control circuit
CN102736039B (zh) * 2011-04-02 2016-05-11 欧司朗股份有限公司 灯丝检测电路
CN102355787B (zh) * 2011-08-08 2013-09-25 杭州电子科技大学 基于uba2211的变频调光方法与电路
US9414472B2 (en) 2012-09-28 2016-08-09 Lutron Electronics Co., Inc. Filament miswire protection in an electronic dimming ballast
CN106507559B (zh) * 2015-09-08 2021-05-25 朗德万斯公司 照明装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5668446A (en) 1995-01-17 1997-09-16 Negawatt Technologies Inc. Energy management control system for fluorescent lighting
GB2337644B (en) 1998-05-22 2002-07-17 Mackwell Electronics Ltd Fluorescent Lamps for Emergency Lighting Applications
US6111369A (en) 1998-12-18 2000-08-29 Clalight Israel Ltd. Electronic ballast
JP2001319791A (ja) 2000-05-10 2001-11-16 Matsushita Electric Ind Co Ltd 蛍光ランプ点灯装置
JP3975653B2 (ja) * 2000-06-12 2007-09-12 松下電工株式会社 放電灯点灯装置
US7279853B2 (en) * 2003-09-08 2007-10-09 Maxlite - Sk America, Inc. Fluorescent lamp dimmer control

Also Published As

Publication number Publication date
US20090267518A1 (en) 2009-10-29
CN101288346B (zh) 2012-06-27
WO2007045604A1 (fr) 2007-04-26
CN101288346A (zh) 2008-10-15
KR101313130B1 (ko) 2013-09-30
EP1938670B8 (fr) 2012-02-08
ATE520287T1 (de) 2011-08-15
CA2625335A1 (fr) 2007-04-26
KR20080067350A (ko) 2008-07-18
US7863830B2 (en) 2011-01-04
EP1938670A1 (fr) 2008-07-02
DE102005049583A1 (de) 2007-04-19

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