EP0589962B1 - Schaltungsanordnung zum betrieb einer entladungslampe - Google Patents

Schaltungsanordnung zum betrieb einer entladungslampe Download PDF

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Publication number
EP0589962B1
EP0589962B1 EP92912054A EP92912054A EP0589962B1 EP 0589962 B1 EP0589962 B1 EP 0589962B1 EP 92912054 A EP92912054 A EP 92912054A EP 92912054 A EP92912054 A EP 92912054A EP 0589962 B1 EP0589962 B1 EP 0589962B1
Authority
EP
European Patent Office
Prior art keywords
breakdown voltage
discharge lamp
circuit arrangement
arrangement according
circuit
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
EP92912054A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0589962A1 (de
Inventor
Erhard Bernicke
Klaus RÖHR
Karl Eibisch
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.)
Prolux Maschinenbau GmbH
Original Assignee
Prolux Maschinenbau 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 Prolux Maschinenbau GmbH filed Critical Prolux Maschinenbau GmbH
Publication of EP0589962A1 publication Critical patent/EP0589962A1/de
Application granted granted Critical
Publication of EP0589962B1 publication Critical patent/EP0589962B1/de
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
    • 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

Definitions

  • the invention relates to a circuit arrangement for operating a discharge lamp, preferably a low-pressure discharge lamp, with a high-frequency inverter or converter, an inductance connected in series with the discharge lamp and a capacitor arranged in parallel with the discharge lamp.
  • the operation of a discharge lamp is understood to mean all states of a discharge lamp from ignition to stationary burning.
  • Low pressure discharge lamps in particular fluorescent lamps, are widely used for electrical light generation. Compared to incandescent lamps, they are characterized by a higher luminous efficacy, greater efficiency and a longer service life.
  • Low-pressure discharge lamps essentially consist of a discharge vessel which is coated on the inside of fluorescent lamps with fluorescent lamps, electrodes, a gas filling and a lamp base with contact pins.
  • the discharge lamps generate light via the process of gas discharge in the discharge vessel.
  • ballasts There are various implementation options for ballasts, which essentially differ in the way in which the lamp is ignited. Ballasts are the most common, in which the electrodes are preheated before the gas discharge is ignited.
  • ballasts In such ballasts, the gas discharge is ignited by a voltage pulse.
  • the conventional ballasts use a glow starter to generate voltage pulses.
  • the ballast is preferably implemented using purely electronic components. This is particularly true for compact lamps in which the ballast is integrated into the lamp base to save space. Compact lamps stand out in contrast to the conventional rod-shaped fluorescent lamps by small dimensions.
  • Electronic ballasts are known. They essentially consist of a low-pass filter, a radio interference filter, a rectifier and an inverter or converter.
  • the inverter or converter generates a high-frequency AC voltage of approximately 25 to 50 kHz, which is applied to the electrodes of the discharge lamp.
  • a low-pressure discharge lamp is operated with a high-frequency alternating voltage, a higher luminous efficiency of the lamps is achieved than with low-frequency operation.
  • the light generated in this mode is also flicker-free.
  • DE-OS 38 40 845 A1 describes a circuit arrangement for operating a low-pressure discharge lamp with an inductance connected in series with the discharge lamp and a capacitor arranged in parallel with the discharge lamp.
  • a two-pole connection is provided, which is connected on the one hand to a switching point of the load circuit and on the other hand at least via a diode to the positive pole and / or via a diode to the negative pole of a DC voltage source for supplying the circuit arrangement.
  • the diodes block the preheating circuit after the discharge lamp has been ignited.
  • the two-pole circuit consists of a series connection of a PTC thermistor and two Z diodes which are polarized in opposite directions. This serves to secure the blocking of the preheating circuit at burning voltages over 70 V.
  • a circuit arrangement for operating a discharge lamp which consists of an inverter for generating a high-frequency operating voltage for the discharge lamp, an inductor connected in series with the discharge lamp, a capacitor arranged in parallel with the discharge lamp and a capacitor arranged in parallel with the capacitor PTC thermistor exists.
  • a current flows through the PTC thermistor even after the discharge lamp has been ignited, as a result of which the aging of the PTC thermistor is accelerated.
  • the starting characteristic of the discharge lamp is determined by the ambient temperature and the operating data of the PTC thermistor that change with aging, so that constant ignition of a discharge lamp is not possible with the known circuit arrangements.
  • the invention has for its object to provide a simple circuit arrangement according to the preamble of the first claim for gentle operation of a discharge lamp, which enables a substantially constant ignition of a discharge lamp.
  • this object is achieved in that in a circuit arrangement which has a high-frequency alternating or converter, which has an inductance connected in series with the discharge lamp and a capacitor arranged in parallel with the discharge lamp, the series connection of a PTC thermistor with a bidirectional breakdown voltage component is arranged in parallel with the inductor or capacitor, so that the PTC thermistor and the bidirectional breakdown voltage component are thermally coupled to one another are and that the degree of thermal coupling is selectively adjustable.
  • the solution according to the invention creates a simple circuit arrangement for the gentle operation of a discharge lamp, in particular a low-pressure discharge lamp, by causing a voltage limitation in the preheating phase of the lamp and thus preventing spontaneous ignition of the discharge lamp by excessive resonance in the load circuit.
  • the specifically adjustable thermal coupling of the PTC thermistor and the bidirectional breakdown voltage component leads to additional heating of the PTC thermistor by the heat loss of the bidirectionally acting breakdown voltage component.
  • the supply of heat by the bidirectional breakdown voltage component has the effect, in particular, that the change in the operating data of the PTC thermistor due to aging and the ambient temperature are only greatly reduced in the starting characteristic of the discharge lamp and thus an essentially constant ignition of the discharge lamp is ensured.
  • the inductance and a capacitor provided as a capacitor form a series resonant circuit.
  • current flows through the PTC thermistor and the bidirectional breakdown voltage component, so that they heat up.
  • the degree of thermal coupling of the PTC thermistor and the bidirectional breakdown voltage component can be specifically adjusted. This enables a targeted setting of the starting characteristics of the discharge lamp:
  • the bidirectional breakdown voltage component is subjected to a high power loss, which leads to a certain additional heating of the PTC thermistor via the thermal coupling and thus sooner or later corresponding to the degree of thermal coupling to the resonance increase in the series resonant circuit and to the ignition of the discharge lamp .
  • the degree of thermal coupling of PTC thermistor and bidirectional Breakdown voltage component thus enables a targeted setting of the starting characteristics of the lamp.
  • the circuit arrangement according to the invention enables simple adaptation of the heating time to different lamp parameters.
  • the thermal coupling of the PTC thermistor and the bidirectional breakdown voltage component is advantageously carried out by a connecting medium.
  • Glue or lacquer for example, are suitable as the connecting medium.
  • the degree of thermal coupling can be adjusted in particular by appropriate choice of the connecting medium.
  • the thermal coupling can also be set by varying the spatial distance between the PTC thermistor and the bidirectional breakdown voltage component.
  • a transil diode or a varistor, for example, is used as the bidirectional breakdown voltage component.
  • Two oppositely polarized and series-connected Zener diodes are also suitable for realizing the bidirectionally acting breakdown voltage component.
  • the breakdown voltage of the bidirectional breakdown voltage component is advantageously chosen so that it is below the ignition voltage and above the operating voltage of the discharge lamp. It is achieved on the one hand that in the preheating phase of the lamp by the PTC thermistor and the bidirectional breakdown voltage component existing preheating circuit current flows and thus the electrodes are preheated while the gas discharge is not yet igniting.
  • the PTC thermistor and the bidirectional breakdown voltage component are preferably integrated in one component.
  • the load circuit 3 contains the inductance L1, which is connected in series to the parallel connection of the discharge lamp H1 with at least one capacitor C1 as a capacitor.
  • the series circuit comprising a PTC thermistor V1 and a transile diode V2 is arranged in parallel with the capacitor C1.
  • the PTC thermistor V1 and the transile diode V2 are preferably thermally coupled to one another via a lacquer, which is indicated by the dashed connection of the two components.
  • the capacitors C2 and C3 serve both for AC coupling and for smoothing the supply voltage.
  • the inverter 2 supplies a square wave voltage of approximately 310 Vpp.
  • the current in the load circuit 3 flows through the inductance L1, the heating coils of the lamp electrodes and the capacitor C1, the PTC thermistor V1 and the transile diode V2.
  • the breakdown voltage of the transile diode V2 is dimensioned such that the discharge lamp H1 does not ignite spontaneously, but heating of the electrodes is ensured. Due to the thermal coupling between PTC thermistor V1 and transile diode V2, PTC thermistor V1 is additionally warmed up by the heat loss of the transile diode V2. As the PTC thermistor V1 heats up, its resistance and thus the resonance increase at the discharge lamp H1 increases until it is ignited.
  • the peak voltage of the discharge lamp H1 is below the breakdown voltage of the transile diode V2.
  • the preheating circuit is blocked and therefore does not represent an additional load.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP92912054A 1991-06-21 1992-06-19 Schaltungsanordnung zum betrieb einer entladungslampe Expired - Lifetime EP0589962B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4121009 1991-06-21
DE4121009A DE4121009C2 (de) 1991-06-21 1991-06-21 Schaltungsanordnung zum Betrieb einer Entladungslampe
PCT/DE1992/000514 WO1993000784A1 (de) 1991-06-21 1992-06-19 Schaltungsanordnung zum betrieb einer entladungslampe

Publications (2)

Publication Number Publication Date
EP0589962A1 EP0589962A1 (de) 1994-04-06
EP0589962B1 true EP0589962B1 (de) 1997-01-08

Family

ID=6434732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92912054A Expired - Lifetime EP0589962B1 (de) 1991-06-21 1992-06-19 Schaltungsanordnung zum betrieb einer entladungslampe

Country Status (10)

Country Link
US (1) US5543690A (cs)
EP (1) EP0589962B1 (cs)
CA (1) CA2112121A1 (cs)
CZ (1) CZ280431B6 (cs)
DE (2) DE4121009C2 (cs)
HU (1) HU213965B (cs)
PL (1) PL168728B1 (cs)
RU (1) RU2115272C1 (cs)
SK (1) SK279063B6 (cs)
WO (1) WO1993000784A1 (cs)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641147A1 (en) * 1993-08-30 1995-03-01 General Electric Company Electronic quad ballast with improved hot restart
CN2183650Y (zh) * 1994-01-18 1994-11-23 马士科技有限公司 荧光灯预热启动器件
GB9509234D0 (en) * 1995-05-05 1995-06-28 Bailey Arthur R High frequency fluorescent lamp circuit with ballast protection
AUPN342195A0 (en) * 1995-06-08 1995-06-29 Ultralite International Pty. Limited Improved pre-heat circuit for electrical discharge lamp
FR2738444A1 (fr) * 1995-09-06 1997-03-07 Lor Hak Ballast electronique auto-oscillant a transformateur unique special et protection contre les allumages sans charge
DE19709545A1 (de) * 1997-03-07 1998-09-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltsteuerung einer Betriebsschaltung
US5982107A (en) * 1997-04-08 1999-11-09 Pinbeam Ag Drive circuit for a power-saving lamp
TW437909U (en) * 1998-10-26 2001-05-28 Idea Up Tech Co Ltd Soft start device of lighting
US6147455A (en) * 1999-06-02 2000-11-14 General Electric Company Gas discharge lamp ballast circuit with electronic starter
US6153983A (en) * 1999-07-21 2000-11-28 General Electric Company Full wave electronic starter
US6429602B1 (en) * 1999-11-05 2002-08-06 Matsushita Electric Industrial Co., Ltd. Fluorescent lamp operating apparatus
JP2003036987A (ja) * 2001-07-24 2003-02-07 Harison Toshiba Lighting Corp 放電ランプ点灯装置、機器および画像形成装置
US6936970B2 (en) * 2003-09-30 2005-08-30 General Electric Company Method and apparatus for a unidirectional switching, current limited cutoff circuit for an electronic ballast
DE102004056002A1 (de) * 2004-11-19 2006-05-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe mit Impulszündvorrichtung und Betriebsverfahren für eine Hochdruckentladungslampe
JP6588463B2 (ja) * 2014-04-07 2019-10-09 ルミレッズ ホールディング ベーフェー 点火装置の構成
PL235522B1 (pl) * 2018-08-03 2020-08-24 Edward Reszke Sposób wytwarzania impulsów zasilających do generowania wyładowania jarzeniowego pomiędzy elektrodami zamkniętymi w komorze z obniżonym ciśnieniem gazu i układ do wytwarzania impulsów zasilających do generowania wyładowania jarzeniowego pomiędzy elektrodami zamkniętymi w komorze z obniżonym ciśnieniem gazu

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT380373B (de) * 1983-05-17 1986-05-12 Zumtobel Ag Umschwingwechselrichter zur speisung von leuchtstofflampen
NL8400923A (nl) * 1984-03-23 1985-10-16 Philips Nv Elektrische inrichting voor het onsteken en voeden van een gas- en/of dampontladingsbuis.
NL8701314A (nl) * 1987-06-05 1989-01-02 Philips Nv Gelijkstroom-wisselstroom omzetter voor het onsteken en voeden van een gasontladingslamp.
DD264564B5 (de) * 1987-10-02 1994-04-07 Narva Gluehlampen Schaltungsanordnung fuer die zuendung und den betrieb einer niederdruckentladungslampe
NL8702489A (nl) * 1987-10-19 1989-05-16 Philips Nv Gelijkstroom-wisselstroom omzetter voor het ontsteken en voeden van een gasontladingslamp.
DE3805510A1 (de) * 1988-02-22 1989-08-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer niederdruckentladungslampe
DE3901111A1 (de) * 1989-01-16 1990-07-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb von entladungslampen
US5075602A (en) * 1989-11-29 1991-12-24 U.S. Philips Corporation Discharge lamp control circuit arrangement

Also Published As

Publication number Publication date
SK279063B6 (sk) 1998-06-03
SK145193A3 (en) 1994-12-07
CZ280431B6 (cs) 1996-01-17
CA2112121A1 (en) 1993-01-07
PL168728B1 (pl) 1996-03-29
WO1993000784A1 (de) 1993-01-07
HUT67231A (en) 1995-03-28
RU2115272C1 (ru) 1998-07-10
EP0589962A1 (de) 1994-04-06
DE4121009C2 (de) 1994-01-13
DE59207858D1 (de) 1997-02-20
DE4121009A1 (de) 1992-12-24
CZ283593A3 (en) 1994-05-18
US5543690A (en) 1996-08-06
HU213965B (en) 1997-11-28

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