EP1095543B1 - Ballast pour au moins une lampe a decharge, et procede pour faire fonctionner une tel ballast - Google Patents

Ballast pour au moins une lampe a decharge, et procede pour faire fonctionner une tel ballast Download PDF

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Publication number
EP1095543B1
EP1095543B1 EP00941880A EP00941880A EP1095543B1 EP 1095543 B1 EP1095543 B1 EP 1095543B1 EP 00941880 A EP00941880 A EP 00941880A EP 00941880 A EP00941880 A EP 00941880A EP 1095543 B1 EP1095543 B1 EP 1095543B1
Authority
EP
European Patent Office
Prior art keywords
pulse duty
duty factor
ballast
control circuit
gas discharge
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
EP00941880A
Other languages
German (de)
English (en)
Other versions
EP1095543A1 (fr
Inventor
Franz Raiser
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
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1095543A1 publication Critical patent/EP1095543A1/fr
Application granted granted Critical
Publication of EP1095543B1 publication Critical patent/EP1095543B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H05B41/282—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
    • H05B41/2825—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 by means of a bridge converter in the final stage
    • H05B41/2828—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 by means of a bridge converter in the final stage using control circuits for the switching elements
    • 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
    • H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal 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
    • H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the present invention relates to a ballast for at least one gas discharge lamp according to the preamble of claim 1 and a method for operating a ballast for at least one gas discharge lamp according to the preamble of claim 7.
  • Another object of the present invention is a method to operate a ballast of the type mentioned in the introduction, prevents an uneven glowing of the gas discharge lamp becomes.
  • the invention is based on the knowledge that a dimming operation with the control circuit provided control signals according to Figures 3a and 3b of WO 94/06261 to a different temperature of the two Lamp electrodes leads. As experiments have shown, essentially occurs same thermal load on the two electrodes of the gas discharge lamp no more uneven lighting.
  • the solution according to the invention not only offers advantages in dimming operation Gas discharge lamp, it can also be used predetermined ballast by varying the duty cycle in inventive Way for the operation of various gas discharge lamps with completely different lamp parameters, especially lamp powers to make available.
  • a ballast becomes like this dimensioned that it to operate the gas discharge lamp, the maximum power requires working with a 50% duty cycle. All other lamps, which are to be operated with the same ballast, then operated with a duty cycle of less than 50% without uneven Lights of these lamps would be feared.
  • the first and second switches operated in push-pull mode, i.e. during the one switch Receives input signal at a high level, the other switch receives one on low level and vice versa.
  • the control circuit Duty cycle of both switches is changed periodically. This manifests itself preferably in that the duty cycle is controlled with the control circuit is that the sum of the ON times of the first switch is equal on average is the sum of the ON times of the second switch.
  • the first and the second switch can be operated with N different duty cycles, where N ⁇ 2 and the change between the different duty cycles with a period that in the shortest case determines it is that each duty cycle is only executed once before the next is changed, and which in the longest case is determined by the thermal inertia of the first and second electrodes.
  • N N ⁇ 2 and the change between the different duty cycles with a period that in the shortest case determines it is that each duty cycle is only executed once before the next is changed, and which in the longest case is determined by the thermal inertia of the first and second electrodes.
  • N 2
  • D 100 - D.
  • Lamp matching duty cycle be stored in the control circuit can also be provided, in addition, an input of the control circuit provide the duty cycle by an operator can be changed, for example for dimming the gas discharge lamp.
  • FIG. 1 shows a ballast 10 according to the invention with a component 12 which is connected on the input side to a mains voltage source U N and comprises a rectifier, filters known to the person skilled in the art and, if appropriate, also devices for correcting the mains-side power factor.
  • the DC voltage signal provided by module 12 is stabilized via a capacitor C0 and applied to a bridge circuit with a switch T1 and a switch T2.
  • the bridge center is connected to the load circuit 14, which comprises a gas discharge lamp 26 with a first and a second electrode 28, 30.
  • the switches T1 and T2 form together with the capacitors C1 and C2 a half-bridge arrangement.
  • a Control circuit 16 supplies the control signals for switches T1 and T2 Lines 18 and 20 respectively.
  • the control circuit 16 can be connected via a line 22 Lamp data are provided, for example data about the current in the lamp's power and the lamp current generated during the generation that applied to switches T1 and T2 via lines 18 and 20 Control signals can be taken into account.
  • the control circuit 16 can have a microcontroller in which the configuration of the Lines 18, 20 are filed to the control signals provided at the switches T1 and T2 is, for example for the operation of the respective gas discharge lamp 26 with Maximum power.
  • an input signal of the control circuit via a line 24 are supplied with which an operator receives the control signals can influence the switches T1 and T2, for example by pressing one Knob or the like for dimming the gas discharge lamp 26.
  • Die control signals provided by the control circuit 16 via the lines 18 and 20 are described in more detail below with reference to FIGS. 2 and 3:
  • Fig. 2 shows in the curves A and B the time course of the control signals of the first and second switches T1, T2 according to the teaching of the prior art.
  • Switch T1 is operated according to the curve with a duty cycle of 30%.
  • Switch T2 is operated according to curve B with a duty cycle of 70%.
  • the curves C and D show the time profiles of the associated currents I1 and I2 through the switch T1 and through the switch T2.
  • Curve E shows the time course of the load current I L. Due to the differently long ON times of switch T1 and switch T2, different currents result through electrodes 28, 30 of the gas discharge lamp 26, depending on whether switch T1 or T2 is in the ON state. This leads to an uneven thermal load on the electrodes 28, 30 of the gas discharge lamp 26.
  • Fig. 3 shows, corresponding to Fig. 2, the time course of the same Circuit parameters when modifying the ballast according to the invention Teaching.
  • Both switches T1 and T2 are operated in push-pull, i.e. with the exception of negligible switching operations the one switch a signal with a high level as drive signal, while the other switch has a drive signal with a low level and vice versa.
  • curve A is considered: While switch T1 is operated with a duty cycle of 70% between times t1 and t2, control circuit 16 changes the duty cycle to 30% at time t2. This duty cycle is maintained until time t3, after which the switch is made to a duty cycle of 70%. With reference to curve B of FIG. 3, switch T2 is operated with the corresponding inverse duty cycle, ie between times t2 and t3 with a duty cycle of 70% and after t3 there is again a duty cycle of 70%.
  • the curves C, D and E in turn show the time profiles of the currents I1, 12 and the load current I L.
  • Fig. 3 shows a switch from a duty cycle to one others immediately after going through a duty cycle of a particular one Duty cycle. However, it can also be provided a specific one Maintain duty cycle over a longer period of time before moving on to the next Duty cycle is switched, but on the condition that there are no significantly different thermal loads on the two Electrodes 28, 30 of the gas discharge lamp 26 result.
  • Switching from a duty cycle to another not immediately after a single execution a certain duty cycle has the advantage that in the control circuit 16 components can be used for lower frequencies designed and therefore cheaper. For example, a cheaper microcontroller can be used, as the switchover times are shorter Amount of data must be processed.
  • the circuit described is not only for externally controlled but also for free-swinging inverters can be used.
  • Bipolar transistors were selected as an example in FIG. 1.
  • Other types of switches for example Field effect transistors come into consideration.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (14)

  1. Ballast pour au moins une lampe (26) à décharge dans du gaz comprenant un onduleur alimenté par une source (C0) de tension continue qui a un montage en pont monté en parallèle à la source (C0) de tension continue et ayant un premier et un deuxième interrupteur (T1, T2) pouvant être commandés, le point médian du pont étant relié à un circuit (14) de charge qui comporte au moins une lampe (26) à décharge dans du gaz, chaque lampe (26) à décharge dans du gaz ayant une première et une deuxième électrode (28, 30), et un circuit (16) de commande par lequel le rapport cyclique du premier et du deuxième interrupteur (T1, T2) peut être influencé, et le rapport cyclique est différent de 50 %,
    caractérisé en ce que le rapport cyclique peut être commandé par le circuit (16) de commande de façon à ce que la première et la deuxième électrode (28, 30) soient chargées thermiquement sensiblement de la même façon en moyenne.
  2. Ballast suivant la revendication 1, caractérisé en ce que le premier et le deuxième interrupteur (T1, T2) peuvent fonctionner en push pull.
  3. Ballast suivant la revendication 1 ou 2, caractérisé en ce que le rapport cyclique des deux interrupteurs (T1, T2) peut être modifié périodiquement par le circuit de commande.
  4. Ballast suivant la revendication 3, caractérisé en ce que le rapport cyclique peut être commandé par le circuit (16) de commande de façon à ce que la somme des temps de fermeture du premier interrupteur est égale en moyenne à la somme des temps de fermeture du deuxième interrupteur.
  5. Ballast suivant la revendication 3 ou 4, caractérisé en ce que, par le circuit (16) de commande, le premier et le deuxième interrupteur (T1, T2) peuvent fonctionner avec N rapports cycliques différents, N étant supérieur ou égal à 2, et le passage entre les rapports cycliques différents peut être commandé suivant une période qui est déterminée dans le cas le plus court par le fait que chaque rapport cyclique n'est réalisé qu'exactement une fois avant de passer au suivant et qui, dans le cas le plus long, est déterminée par l'inertie thermique de la première et de la deuxième électrode (28, 30).
  6. Ballast suivant la revendication 5, caractérisé en ce que N est égal à 2, le premier rapport cyclique D et le deuxième rapport cyclique E étant tels, que E = 100 % - D.
  7. Ballast suivant l'une des revendications précédentes, caractérisé en ce que le circuit (16) de commande a une entrée par laquelle le rapport cyclique peut être influencé par une personne de service.
  8. Procédé pour faire fonctionner un ballast pour au moins une lampe (26) de décharge dans du gaz, le ballast comprenant un onduleur alimenté par une source (C0) de tension continue qui a un montage en pont monté en parallèle à la source (C0) de tension continue et ayant un premier et un deuxième interrupteur (T1, T2) pouvant être commandés, le point médian du pont étant relié à un circuit (14) de charge qui comporte au moins une lampe (26) à décharge dans du gaz, chaque lampe (26) à décharge dans du gaz ayant une première et une deuxième électrode (28, 30), et un circuit (16) de commande par lequel le rapport cyclique du premier et du deuxième interrupteur (T1, T2) peut être influencé, et le rapport cyclique est différent de 50 %,
    caractérisé en ce que l'on commande le rapport cyclique par le circuit (16) de commande de façon à ce que les première et deuxième électrodes (28, 30) soient chargées thermiquement de manière sensiblement égale en moyenne.
  9. Procédé suivant la revendication 8, caractérisé en ce que l'on fait fonctionner le premier et le deuxième interrupteur (T1, T2) en push pull.
  10. Procédé suivant la revendication 8 ou 9, caractérisé en ce que, par le circuit (16) de commande, on modifie périodiquement le rapport cyclique des deux interrupteurs (T1, T2).
  11. Procédé suivant la revendication 10, caractérisé en ce que l'on commande le rapport cyclique de manière à ce que la somme des temps de fermeture du premier interrupteur soit en moyenne égale à la somme des temps de fermeture du deuxième interrupteur.
  12. Procédé suivant la revendication 10 ou 11, caractérisé en ce que l'on fait fonctionner le premier et le deuxième interrupteur (T1, T2) avec N rapports cycliques différents, N étant supérieur ou égal à 2, et le passage entre les rapports cycliques différents peut être commandé suivant une période qui est déterminée dans le cas le plus court par le fait que chaque rapport cyclique n'est réalisé qu'exactement une fois avant de passer au suivant et qui, dans le cas le plus long, est déterminée par une inertie thermique de la première et de la deuxième électrode (28, 30).
  13. Procédé suivant la revendication 12, caractérisé en ce que N est égal à 2, le premier rapport cyclique D et le deuxième rapport cyclique E étant tels, que E = 100 % - D.
  14. Procédé suivant l'une des revendications 8 à 13, caractérisé en ce que le circuit (16) de commande a une entrée par laquelle le rapport cyclique est influencé par une personne de service.
EP00941880A 1999-05-12 2000-04-19 Ballast pour au moins une lampe a decharge, et procede pour faire fonctionner une tel ballast Expired - Lifetime EP1095543B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19922039A DE19922039A1 (de) 1999-05-12 1999-05-12 Vorschaltgerät für mindestens eine Gasentladungslampe und Verfahren zum Betreiben eines derartigen Vorschaltgeräts
DE19922039 1999-05-12
PCT/DE2000/001226 WO2000070921A1 (fr) 1999-05-12 2000-04-19 Ballast pour au moins une lampe a decharge, et procede pour faire fonctionner une tel ballast

Publications (2)

Publication Number Publication Date
EP1095543A1 EP1095543A1 (fr) 2001-05-02
EP1095543B1 true EP1095543B1 (fr) 2003-11-12

Family

ID=7907933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00941880A Expired - Lifetime EP1095543B1 (fr) 1999-05-12 2000-04-19 Ballast pour au moins une lampe a decharge, et procede pour faire fonctionner une tel ballast

Country Status (10)

Country Link
US (1) US6316888B1 (fr)
EP (1) EP1095543B1 (fr)
JP (1) JP2003500808A (fr)
KR (1) KR20010071870A (fr)
CN (1) CN1242653C (fr)
AT (1) ATE254385T1 (fr)
CA (1) CA2337062A1 (fr)
DE (2) DE19922039A1 (fr)
TW (1) TW494706B (fr)
WO (1) WO2000070921A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1297728B1 (fr) * 2000-06-20 2005-08-24 Koninklijke Philips Electronics N.V. Dispositif de circuit
US6388398B1 (en) * 2001-03-20 2002-05-14 Koninklijke Philips Electronics N.V. Mixed mode control for ballast circuit
SE516910C2 (sv) 2001-03-29 2002-03-19 Kanthal Ab Anordning vid horisontell installation av elektriska motståndselement
DE10125510A1 (de) * 2001-05-23 2002-12-05 Innolux Gmbh Leuchtstofflampenschaltung
WO2003009650A1 (fr) * 2001-07-19 2003-01-30 Koninklijke Philips Electronics N.V. Dispositif pour actionner une lampe a decharge haute pression
US7964883B2 (en) * 2004-02-26 2011-06-21 Lighting Science Group Corporation Light emitting diode package assembly that emulates the light pattern produced by an incandescent filament bulb
JP4771073B2 (ja) * 2005-03-24 2011-09-14 東芝ライテック株式会社 放電ランプ点灯装置および照明装置
DE102005021595A1 (de) * 2005-05-10 2006-11-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elekronisches Vorschaltgerät und entsprechendes Einstellverfahren

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FR2067690A5 (fr) * 1969-11-13 1971-08-20 Lepaute
US4388563A (en) * 1981-05-26 1983-06-14 Commodore Electronics, Ltd. Solid-state fluorescent lamp ballast
US4682080A (en) * 1984-08-17 1987-07-21 Hitachi, Ltd. Discharge lamp operating device
AT392384B (de) * 1985-02-04 1991-03-25 Zumtobel Ag Vorschaltgeraet zum betrieb von gasentladungslampen mit gleichstrom
DE3729383A1 (de) * 1987-09-03 1989-03-16 Philips Patentverwaltung Schaltungsanordnung zum starten einer hochdruckgasentladungslampe
US4920299A (en) * 1988-04-27 1990-04-24 General Electric Company Push-pull fluorescent dimming circuit
US5103138A (en) * 1990-04-26 1992-04-07 Orenstein Edward D Switching excitation supply for gas discharge tubes having means for eliminating the bubble effect
DE4123187A1 (de) * 1991-07-12 1993-01-14 Tridonic Bauelemente Vorschaltgeraet zum pulsbetrieb von gasentladungslampen
US5189343A (en) * 1991-08-27 1993-02-23 Everbrite, Inc. High frequency luminous tube power supply having neon-bubble and mercury-migration suppression
DE4228641A1 (de) * 1992-08-28 1994-03-03 Tridonic Bauelemente Gmbh Dorn Vorschaltgerät für eine Gasentladungslampe mit einem Wechselrichter
TW344190B (en) * 1992-09-22 1998-11-01 Matsushita Electric Works Ltd Discharge lamp lighting device
JP3244859B2 (ja) * 1993-04-12 2002-01-07 池田デンソー株式会社 放電灯点灯装置
US5583402A (en) * 1994-01-31 1996-12-10 Magnetek, Inc. Symmetry control circuit and method
DE19708792A1 (de) * 1997-03-04 1998-09-10 Tridonic Bauelemente Verfahren und Vorrichtung zum Erfassen des in einer Gasentladungslampe auftretenden Gleichrichteffekts
US5949197A (en) * 1997-06-30 1999-09-07 Everbrite, Inc. Apparatus and method for dimming a gas discharge lamp

Also Published As

Publication number Publication date
CN1304631A (zh) 2001-07-18
DE19922039A1 (de) 2000-11-16
CN1242653C (zh) 2006-02-15
ATE254385T1 (de) 2003-11-15
TW494706B (en) 2002-07-11
JP2003500808A (ja) 2003-01-07
US6316888B1 (en) 2001-11-13
KR20010071870A (ko) 2001-07-31
EP1095543A1 (fr) 2001-05-02
DE50004415D1 (de) 2003-12-18
WO2000070921A1 (fr) 2000-11-23
CA2337062A1 (fr) 2000-11-23

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