EP0024522A2 - Convertisseur pour alimenter au moins deux lampes à décharge - Google Patents

Convertisseur pour alimenter au moins deux lampes à décharge Download PDF

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Publication number
EP0024522A2
EP0024522A2 EP80103981A EP80103981A EP0024522A2 EP 0024522 A2 EP0024522 A2 EP 0024522A2 EP 80103981 A EP80103981 A EP 80103981A EP 80103981 A EP80103981 A EP 80103981A EP 0024522 A2 EP0024522 A2 EP 0024522A2
Authority
EP
European Patent Office
Prior art keywords
inverter
discharge lamps
discharge lamp
windings
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.)
Granted
Application number
EP80103981A
Other languages
German (de)
English (en)
Other versions
EP0024522B1 (fr
EP0024522A3 (en
Inventor
Otto Kreutzer
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
Original Assignee
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
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT80103981T priority Critical patent/ATE4565T1/de
Publication of EP0024522A2 publication Critical patent/EP0024522A2/fr
Publication of EP0024522A3 publication Critical patent/EP0024522A3/de
Application granted granted Critical
Publication of EP0024522B1 publication Critical patent/EP0024522B1/fr
Expired 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
    • H05B41/282—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
    • H05B41/2821—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 single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—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 single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps

Definitions

  • the invention relates to an inverter for operating a discharge lamp with a stray field transformer having a jacket core, to the secondary winding of which the discharge lamp is connected and whose primary winding is arranged on the middle leg.
  • the open circuit voltage is dimensioned so that it is sufficient to ignite the discharge lamp.
  • the operating current of the ignited discharge lamp is set by appropriately dimensioning the stray inductance of the stray field transformer.
  • the jacket core has at least three outer legs arranged around the middle leg, at least two of which are designed without an air gap and each have a secondary winding for connecting a discharge lamp and that at least one outer leg has an air gap.
  • the invention is based on the fact that the lamp which ignites first in the core of the stray field transformer causes such a flux shift that the open circuit voltage of the secondary windings of the discharge lamps which have not yet been ignited increases until they also ignite.
  • the inverter 1 works with a stray field transformer 2, the core of which is designated 20.
  • the latter is a ferrite core in an open shell design, in which four outer legs 202, 203, 204, 204 'are arranged at the same distance from one another and coaxially around a middle leg 201 an air gap 2041 1 .
  • the two other outer legs 202, 203 each carry a secondary winding 2021, 2031, to each of which a tubular discharge lamp 31, 32 is connected; these - interconnected - secondary windings also have taps that supply the heating voltages for the electrodes of the discharge lamps in a known manner.
  • a voltage divider consisting of an ohmic resistor 41 and a PTC thermistor 42 located in the direct current path of a rectifier bridge, is connected, the tap of which is connected to the housings that hold the discharge lamps or another ignition auxiliary device 311, 321 is connected.
  • the primary winding 2011 and control windings 2012, 2013 are arranged around the center leg 201 and form a known circuit with the inverter 1 (center point circuit, bridge circuit or swinging circuit according to DE-OS 22 39 433).
  • the open-circuit voltage is present on the two discharge lamps 31, 32 and on the voltage divider 41, 42, which leads, for example, to the ignition of the discharge lamp 31.
  • the operating current of this lamp then has a shift in the flow which is initially distributed uniformly over the outer legs 202, 203 in the sense of an increase in the leg 203 and thus an increase in the voltage across the discharge lamp 32, so that it can also ignite.
  • the second discharge lamp does not ignite because it is defective, for example, the discharge lamp 31 would only burn with reduced power. If this is not desired, its operating current can be increased by the series connection of auxiliary windings 2022, 2023 shown.
  • auxiliary windings 2022, 2023 Each of these auxiliary windings, consisting, for example, of only one to three turns, is attached to the outer leg assigned to a secondary winding.
  • the auxiliary windings are connected in opposite directions to one another in series via a capacitor 5, so that the flowing current depends on the difference in the voltages across the auxiliary windings and its size can be adjusted by the capacitor 5.
  • the result of this circuit is that part of the flow shifted to the "idling leg" 203 is brought back to the leg 202.
  • the ignitability of the discharge lamps - especially at very low outside temperatures - is increased by the potential applied by the voltage divider to the auxiliary ignition devices 311, 321: the voltage divider is dimensioned so that the potential at its tap when the inverter is switched on is in the middle between it both endpoints.
  • the maximum potential difference between the auxiliary ignition device of a discharge tube and one of its cathodes corresponds precisely to the voltage supplied by the associated secondary winding. After switching on, the potential of the tap migrates over time towards the upper end point of the voltage divider, so that the potential between the auxiliary ignition device 321 and the lower cathode of the discharge tube 32 increases until it ignites.
  • the open circuit voltages of the stray field transformer are preferably dimensioned such that one of the discharge lamps can only ignite when a correspondingly high voltage is applied to the ignition auxiliary device. In conjunction with an appropriately dimensioned rate of change of the temperature-dependent resistor, this can ensure that the discharge lamp can ignite only after a sufficiently long preheating time.
  • the PTC thermistor also contributes to this, since after switching on it represents a low-resistance load, so that the voltage applied to the lamps is initially certainly not sufficient for ignition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP80103981A 1979-08-06 1980-07-10 Convertisseur pour alimenter au moins deux lampes à décharge Expired EP0024522B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103981T ATE4565T1 (de) 1979-08-06 1980-07-10 Wechselrichter zum betrieb von mindestens zwei entladungslampen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2931870 1979-08-06
DE2931870A DE2931870C2 (de) 1979-08-06 1979-08-06 Wechselrichter zum Betrieb von mindestens zwei Entladungslampen

Publications (3)

Publication Number Publication Date
EP0024522A2 true EP0024522A2 (fr) 1981-03-11
EP0024522A3 EP0024522A3 (en) 1981-03-18
EP0024522B1 EP0024522B1 (fr) 1983-08-31

Family

ID=6077764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103981A Expired EP0024522B1 (fr) 1979-08-06 1980-07-10 Convertisseur pour alimenter au moins deux lampes à décharge

Country Status (3)

Country Link
EP (1) EP0024522B1 (fr)
AT (1) ATE4565T1 (fr)
DE (1) DE2931870C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004769A1 (fr) * 1984-04-09 1985-10-24 Nigg Juerg Procede de raccordement liberable d'appareils d'eclairage electriques, adaptateur respectivement ballast et circuit avec un generateur haute frequence
EP0279073A2 (fr) * 1985-02-07 1988-08-24 Nigg, Jürg Disposition de circuit pour le fonctionnement haute fréquence de lampes fluorescentes à filaments de préchauffage
EP0654203A1 (fr) * 1992-07-17 1995-05-24 Delta Coventry Corporation Circuit electronique a haute frequence servant de ballast
FR2754129A1 (fr) * 1996-08-15 1998-04-03 Marathon Electric Mfg Ensemble d'alternateur special ayant une caracteristique d'impedance de ballast propre pour systemes d'eclairage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001885A1 (fr) * 1981-11-17 1983-05-26 Rozsnyai, Aladár Procede, appareil d'alimentation et dispositif d'eclairage a luminescence pour l'alimentation simultanee de plusieurs dispositifs d'eclairage a partir d'une alimentation commune
US4547705A (en) * 1982-03-20 1985-10-15 Tdk Corporation Discharge lamp lightening device
DE4001840A1 (de) * 1990-01-23 1991-08-08 Bosch Gmbh Robert Transformator, insbesondere zur speisung von entladungslampen in kraftfahrzeugen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2158275A (en) * 1935-08-31 1939-05-16 Acme Electric & Mfg Company High leakage transformer
US2509186A (en) * 1948-09-01 1950-05-23 Advance Transformer Co Ballast construction
GB1176360A (en) * 1967-08-11 1970-01-01 Thorn Electronics Ltd Improvements in Inverter Circuits
DE2239433A1 (de) * 1972-08-10 1974-02-21 Siemens Ag Schaltungsanordnung zum speisen eines verbrauchers mit einer hochfrequenten wechselspannung
DE2901844A1 (de) * 1978-01-30 1979-08-02 Gte Sylvania Inc Elektronisches vorschaltgeraet fuer gasentladungslampen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808261C3 (de) * 1978-02-25 1981-02-05 Peter 7750 Konstanz Kreutzer Schaltungsanordnung zum Zünden und zum Betrieb einer Leuchtstofflampe mit vorheizbaren Elektroden an einem transistorisierten Wechselrichter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2158275A (en) * 1935-08-31 1939-05-16 Acme Electric & Mfg Company High leakage transformer
US2509186A (en) * 1948-09-01 1950-05-23 Advance Transformer Co Ballast construction
GB1176360A (en) * 1967-08-11 1970-01-01 Thorn Electronics Ltd Improvements in Inverter Circuits
DE2239433A1 (de) * 1972-08-10 1974-02-21 Siemens Ag Schaltungsanordnung zum speisen eines verbrauchers mit einer hochfrequenten wechselspannung
DE2901844A1 (de) * 1978-01-30 1979-08-02 Gte Sylvania Inc Elektronisches vorschaltgeraet fuer gasentladungslampen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004769A1 (fr) * 1984-04-09 1985-10-24 Nigg Juerg Procede de raccordement liberable d'appareils d'eclairage electriques, adaptateur respectivement ballast et circuit avec un generateur haute frequence
EP0279073A2 (fr) * 1985-02-07 1988-08-24 Nigg, Jürg Disposition de circuit pour le fonctionnement haute fréquence de lampes fluorescentes à filaments de préchauffage
EP0279073A3 (fr) * 1985-02-07 1990-06-27 Nigg, Jürg Disposition de circuit pour le fonctionnement haute fréquence de lampes fluorescentes à filaments de préchauffage
EP0654203A1 (fr) * 1992-07-17 1995-05-24 Delta Coventry Corporation Circuit electronique a haute frequence servant de ballast
EP0654203A4 (en) * 1992-07-17 1995-06-07 Delta Coventry Corporation High frequency electronic circuit for load ballasting.
FR2754129A1 (fr) * 1996-08-15 1998-04-03 Marathon Electric Mfg Ensemble d'alternateur special ayant une caracteristique d'impedance de ballast propre pour systemes d'eclairage

Also Published As

Publication number Publication date
DE2931870A1 (de) 1981-02-19
DE2931870C2 (de) 1982-05-27
EP0024522B1 (fr) 1983-08-31
EP0024522A3 (en) 1981-03-18
ATE4565T1 (de) 1983-09-15

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