EP1201106B1 - Ballast electronique - Google Patents

Ballast electronique Download PDF

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Publication number
EP1201106B1
EP1201106B1 EP00931065A EP00931065A EP1201106B1 EP 1201106 B1 EP1201106 B1 EP 1201106B1 EP 00931065 A EP00931065 A EP 00931065A EP 00931065 A EP00931065 A EP 00931065A EP 1201106 B1 EP1201106 B1 EP 1201106B1
Authority
EP
European Patent Office
Prior art keywords
transformer
capacitor
discharge lamp
parallel
preheating
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
EP00931065A
Other languages
German (de)
English (en)
Other versions
EP1201106A1 (fr
Inventor
Michael Winkel
Franz Tusch
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.)
OMNITRONIX GMBH
Original Assignee
OMNITRONIX 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 OMNITRONIX GmbH filed Critical OMNITRONIX GmbH
Publication of EP1201106A1 publication Critical patent/EP1201106A1/fr
Application granted granted Critical
Publication of EP1201106B1 publication Critical patent/EP1201106B1/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

Definitions

  • the invention relates to an electronic ballast according to the preamble of the main claim.
  • Electronic ballasts for operating low-pressure discharge lamps usually have one Preheat the electrodes, with a current controlled Preheating and a voltage controlled preheating are known.
  • current-controlled preheating the heating filaments of the discharge lamp are in Series operated with the lamp parallel capacitor. Due to a frequency shift there is a preheating possible, the preheating frequency higher than that Operating frequency is and with increasing frequency the current falls.
  • the amount of preheating, i.e. of the preheating current is determined by the size of the capacitor, the preheating frequency and the maximum preheating voltage determined on the illuminant. Depending on the lamp type However, this can lead to large operating losses and a very low starting voltage.
  • JP 02-312189 discloses a ballast for discharge lamps known to be a voltage controlled Has preheating with a heating transformer. there are the heating coils with switches connected to a secondary winding of the heating transformer.
  • the invention is therefore based on the object electronic ballast with preheating too create in which the operating losses due to Preheating can be kept low and excessive Inrush current is avoided.
  • the circuit for electronic ballasts shown in the figure has a standard half-bridge circuit as the output circuit of the ballast, which is represented by the electronic switches T1 and T2 and by the two half-bridge capacitors C H1 and C H2 .
  • the half-bridge circuit is connected to the supply voltage + U b .
  • a choke L1 is connected, which is connected to one connection of the heating filament 2 of the discharge lamp 1.
  • the other heating coil 3 is connected with a connection to the connection point of the two half-bridge capacitors C H1 , C H2 .
  • one or the other capacitor of the half-bridge can also be omitted.
  • the capacitor which is usually parallel to the lamp 1 is designated C 1 , the capacitor being connected to the primary winding 4 of a transformer 7 in accordance with the invention, in such a way that the series circuit comprising the capacitor C1 and the primary winding 4 is connected in parallel with the discharge lamp 1.
  • the capacitor C1 is dimensioned so that it does not reach the ignition voltage at the preheating frequency, which is, however, supplied by the frequency shift.
  • the transformer 7 has two secondary windings 5, 6, all windings being arranged on a toroidal core, so that the transformer 7 is designed as a toroidal core transformer.
  • the toroidal transformer 7 is characterized in that it immediately saturates when there is a surge above a limit, since there is no air gap.
  • the lamp parallel circuit that is to say a capacitor with a heating transformer, can be placed directly against + U b or ground (GN).
  • GN ground
  • a high-frequency AC voltage is generated after a very short time (a few microseconds), and at a higher preheating frequency, a current flows through the output resonant circuit consisting of inductor L1 and capacitor C1.
  • the voltage drop across the capacitor determines the preheating voltage.
  • the current flowing in the primary winding 4 induces via the toroid in the secondary windings the preheating currents for the heating coils 2, 3, which are limited by the saturation phenomenon in the toroid, since the toroid immediately into the when the ballast starts up, in which a high current flows Satiety has gone.
  • the voltage across capacitor C1 increases due to the beginning of resonance phenomena. The current is also increasing, but the toroid limits the heating currents here too.
  • the lamp ignites and the voltage collapses to the operating voltage of the lamp.
  • the reactive current through the capacitor C 1 is much smaller, as a result of which the heating current also becomes smaller and the losses in the heating coils 2, 3 are reduced.
  • the circuit is one of a current controlled Preheating and a voltage controlled preheating combined preheating given, the first Switch-on torque outweighs the current-controlled preheating, within a very short time in a voltage controlled Preheating passes over.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Glass Compositions (AREA)
  • Furan Compounds (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Claims (3)

  1. Ballast électronique destiné à faire fonctionner des lampes à décharge basse pression, comprenant un onduleur, qui alimente au moins un circuit de charge, le circuit de charge étant muni d'une lampe à décharge (1), d'une bobine (L1) montée en série avec celle-ci, ainsi que d'un condensateur (C1) monté en parallèle à la lampe à décharge et fournissant la tension d'amorçage pour la lampe à décharge, la lampe à décharge étant dotée de deux électrodes (3, 2), qui peuvent être chauffées par l'intermédiaire d'un transformateur de chauffage (7), caractérisé en ce que l'enroulement primaire (4) du transformateur (7) est monté en série avec le condensateur (C1) et ce montage en série est monté en parallèle à la lampe à décharge (1), et respectivement un enroulement secondaire (5, 6) est monté en parallèle à chacune des électrodes, le transformateur (7) étant conçu de telle sorte qu'il atteint rapidement la saturation au moment de la mise sous tension.
  2. Ballast électronique selon la revendication 1, caractérisé en ce que les enroulements secondaires (5, 6) sont montés chacun en série avec un condensateur de couplage (Ck1, Ck2).
  3. Ballast électronique selon la revendication 1 ou 2, caractérisé en ce que le transformateur (7) est conçu sous forme de transformateur toroïdal.
EP00931065A 1999-04-26 2000-04-20 Ballast electronique Expired - Lifetime EP1201106B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19920030A DE19920030A1 (de) 1999-04-26 1999-04-26 Elektronisches Vorschaltgerät
DE19920030 1999-04-26
PCT/EP2000/003584 WO2000065886A1 (fr) 1999-04-26 2000-04-20 Ballast electronique

Publications (2)

Publication Number Publication Date
EP1201106A1 EP1201106A1 (fr) 2002-05-02
EP1201106B1 true EP1201106B1 (fr) 2003-02-19

Family

ID=7906626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00931065A Expired - Lifetime EP1201106B1 (fr) 1999-04-26 2000-04-20 Ballast electronique

Country Status (7)

Country Link
EP (1) EP1201106B1 (fr)
AT (1) ATE233039T1 (fr)
AU (1) AU7193800A (fr)
DE (2) DE19920030A1 (fr)
DK (1) DK1201106T3 (fr)
ES (1) ES2190969T3 (fr)
WO (1) WO2000065886A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304544B4 (de) 2003-02-04 2006-10-12 Hep Tech Co.Ltd. Elektronisches Vorschaltgerät

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312572A1 (de) * 1983-04-08 1984-10-18 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Elektronisches vorschaltgeraet fuer eine leuchtstofflampe
JP2793259B2 (ja) * 1989-05-25 1998-09-03 松下電工株式会社 放電灯点灯装置
DE4014355A1 (de) * 1989-06-27 1991-01-03 Siemens Ag Elektronisches vorschaltgeraet fuer leuchtstofflampen
DE4025938A1 (de) * 1990-08-16 1992-02-20 Diehl Gmbh & Co Schaltungsanordnung fuer den betrieb einer leuchtstofflampe
JPH04223098A (ja) * 1990-12-25 1992-08-12 Matsushita Electric Works Ltd 放電灯点灯装置
JP3257561B2 (ja) * 1991-09-30 2002-02-18 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器具
US5406174A (en) * 1992-12-16 1995-04-11 U. S. Philips Corporation Discharge lamp operating circuit with frequency control of dimming and lamp electrode heating
DE19522675A1 (de) * 1995-06-22 1997-01-02 Eckerle Ind Elektronik Gmbh Schaltungsanordnung zur Zündung einer Leuchtstofflampe
BE1009717A3 (nl) * 1995-10-20 1997-07-01 Philips Electronics Nv Schakelinrichting.

Also Published As

Publication number Publication date
AU7193800A (en) 2000-11-10
ES2190969T3 (es) 2003-09-01
DE19920030A1 (de) 2000-11-09
DE50001296D1 (de) 2003-03-27
ATE233039T1 (de) 2003-03-15
DK1201106T3 (da) 2003-06-10
EP1201106A1 (fr) 2002-05-02
WO2000065886A1 (fr) 2000-11-02

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