EP1594349B1 - Ballast électronique pour une lampe - Google Patents

Ballast électronique pour une lampe Download PDF

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Publication number
EP1594349B1
EP1594349B1 EP05008806A EP05008806A EP1594349B1 EP 1594349 B1 EP1594349 B1 EP 1594349B1 EP 05008806 A EP05008806 A EP 05008806A EP 05008806 A EP05008806 A EP 05008806A EP 1594349 B1 EP1594349 B1 EP 1594349B1
Authority
EP
European Patent Office
Prior art keywords
circuit
commutation
electronic ballast
damping element
capacitor
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
EP05008806A
Other languages
German (de)
English (en)
Other versions
EP1594349A1 (fr
Inventor
Elisa Garavini
Josef Osterried
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 EP1594349A1 publication Critical patent/EP1594349A1/fr
Application granted granted Critical
Publication of EP1594349B1 publication Critical patent/EP1594349B1/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

Definitions

  • the present invention relates to an electronic ballast for a lamp having an input circuit with a connection to a power supply, an output circuit having a connection for the lamp and a voltage converter device arranged between the input and the output circuit, the voltage converter device comprising an input capacitor and an output capacitor, between which a switching device and a freewheeling diode, and at least one damping element, at least one trapezoidal capacitor and an inductance are arranged, wherein the voltage converter device is designed to perform a commutation, based on a commutation before the commutation of a first, a main flow through a main circuit and after the commutation is defined as a second main circuit through which the main current flows, and at least one bypass circuit not through the main current, wherein de R at least one secondary circuit which comprises at least one damping element and the at least one trapezoidal capacitor.
  • Such an electronic ballast is known from MUNOZ B C A, "Study of a new passive lossless turn-off snubber", POWER ELECTRONICS CONGRESS, 1998, CIEP 98, VI IEEE INTERNATIONAL MORELIA; MEXICO 12-15 OCT 1998, PISCATAWAY, NJ, USA, IEEE, US, 12 October 1998 (1998-10-12), pages 147-152, XP010324613 ISBN: 0-7803-5006-5.
  • This known snubber shows a branch circuit comprising three diodes, two capacitors and one inductance. The goal of this snubber circuit is to provide a snubber using only passive components which, in particular, has the least possible losses when switched off, so that the corresponding energy is conducted to the load circuit.
  • FIG. 1 Another known from the prior art device is shown schematically in Fig. 1, wherein the input circuit, the reference numeral 10, the voltage converter device the Reference numeral 12 and the output circuit carries the reference numeral 14.
  • the lamp is identified by the reference numeral 16.
  • FIG. 1 A more detailed illustration of the circuitry used in the prior art voltage conversion device 12 can be seen in FIG. This has on the input side an input capacitor C1 and on the output side an output capacitor C2.
  • the circuit shown here by way of example is designed as a buck converter and has a switching device T1, in the present case a transistor, a freewheeling diode D1, a trapezoidal capacitor C3 and an inductor L1.
  • the switching device T1 and the inductance L1 are arranged in the longitudinal branch, the freewheeling diode D1 and the trapezoidal capacitor C3 are each arranged in a shunt branch.
  • a trapezoidal capacitor is used to adjust the switching speed of the switching device.
  • the inductance L1 is dimensioned in the usual way as a storage inductor and ensures that a current flow is maintained after the commutation.
  • a damping element L2 preferably a ferrite, is arranged serially to the switching device T1.
  • the damping element may also be formed as an iron sheet or as at least one conductor loop.
  • this is preferably threaded in the prior art onto a transistor leg or fitted as a separate component.
  • a damping element With such a damping element, the high-frequency vibrations caused by the switching of the switching element T1 are attenuated.
  • the disadvantage of this known interconnection of the damping element is that it requires a damping element, which must be designed so that it is as low as possible with direct current and as high as possible with high-frequency alternating current.
  • the ratio between resistance at DC and resistance at AC is on the order of 1: 1000.
  • the DC resistance is preferably below 100 m ⁇
  • the AC resistance at HF should be in the order of 100 ⁇ .
  • the damping element must be made relatively large. This has the consequence that the damping element in the prior art can not be implemented in SMD, but must be mounted as a discrete component by hand on the board. The size also has a negative effect on the space already tight in an electric ballast anyway.
  • the present invention is therefore based on the object, a generic electronic ballast in such a way that an automatic assembly is made possible and a significant reduction of the space occupied by the damping element can be achieved.
  • an electronic ballast with the features of claim 1.
  • the invention is based on the finding that the damping element can be made significantly smaller, if it is no longer traversed by the main stream.
  • a significantly smaller component can be selected as in the known implementation. If the size is maintained, significantly better damping properties can be achieved with the electronic ballast according to the invention than in the prior art.
  • the switching device and the freewheeling diode are designed as two separate semiconductor components, e.g. as field effect transistor.
  • the voltage converter device is designed so that before the commutation, the switching device and after commutation the freewheeling diode is traversed by current, or vice versa, and between these two phases, the at least one series circuit of damping element and trapezoidal capacitor is traversed by current.
  • exactly one series circuit of damping element and trapezoidal capacitor is provided, which is arranged parallel to the switching device or parallel to the freewheeling diode.
  • two series circuits each consisting of a damping element and a trapezoidal capacitor may be provided, wherein a first such series connection is arranged parallel to the switching device and a second such series connection is arranged parallel to the free-wheeling diode.
  • the damping element can be formed as ferrite, as iron sheet or as at least one conductor loop.
  • the at least one damping element is designed as an SMD component, whereby a simple automatic assembly is made possible.
  • Figure 3 shows three different embodiments of a voltage converter device, as used in an electronic ballast according to the invention.
  • the three embodiments shown in FIG. 3 each serve to implement a step-down converter.
  • a first main circuit is defined before the commutation, which is shown here by dashed lines and the components comprise input capacitor C1, switching device T1, inductance L1 and output capacitor C2.
  • a second main circuit is defined, characterized in that the current flows in the dash-dotted line comprising the free-wheeling diode D1, the inductance L1 and the output capacitor C2.
  • the current flows through the series circuit of trapezoidal capacitor C3 and damping element L2 and output capacitor C2.
  • the series circuit of trapezoidal capacitor C3 and damping element L2 is arranged in a secondary circuit.
  • the respective main circuit before commutation and the respective main circuit after commutation comprise the same elements as already used in connection with the embodiment of FIG. 3a executed. For the sake of clarity, therefore, only the current flow during the commutation is dotted registered in the figures according to the embodiments 3b and 3c. While in the embodiment according to FIG. 3b the series circuit of damping element L2 and trapezoidal capacitor C3 is arranged in a branch circuit which is arranged parallel to the switching device T1, in the embodiment according to FIG. 3c two series circuits are formed in comparison with the embodiment according to FIG.
  • the embodiments of a voltage converter device of an electronic ballast according to the invention illustrated in FIGS. 4 a and 4 b each realize a step-up converter.
  • the main circuit before commutation comprises the elements input capacitor C1, inductance L1 and switching device T1
  • the main circuit after commutation comprises the elements input capacitor C1, inductance L1, freewheeling diode D1 and output capacitor C2.
  • the current flows in the embodiment according to FIG. 4a through the components input capacitor C1, inductance L1, attenuation element L2 and trapezoidal capacitor C3.
  • the current flows through the components input capacitor C1, inductance L1, damping element L2, trapezoidal capacitor C3 and output capacitor C2.
  • a voltage converter device in the ballast according to the invention also include the serial arrangement of a boost converter and a buck converter, for example, the boost converter of the power factor correction is used and the buck converter of the setting of the output circuit 14 desired voltage levels.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)

Claims (7)

  1. Ballast électronique pour une lampe (16) comprenant :
    - un circuit (10) d'entrée ayant une borne d'une alimentation en tension,
    - un circuit (14) de sortie ayant une borne pour la lampe (16), et
    - un dispositif (12) convertisseur de tension monté entre le circuit (10) d'entrée et le circuit (14) de sortie, le dispositif convertisseur de tension comprenant un condensateur (C1) d'entrée et un condensateur (C2) de sortie entre lesquels sont montés un dispositif (T1) de commutation et une diode (D1) de roue libre, ainsi qu'au moins un élément (L2) d'amortissement, au moins un condensateur (C3) trapèze et une inductance (L1) comme bobine d'accumulation, le dispositif (12) convertisseur de tension étant conçu pour effectuer une commutation ;
    - dans lequel, rapporté à une opération de commutation, il est défini, avant la commutation, un premier circuit de courant principal, dans lequel passe un courant principal et, après la commutation, un deuxième circuit de courant principal dans lequel passe le courant principal, ainsi qu'au moins un circuit de courant secondaire, dans lequel le courant principal ne passe pas.
    - dans lequel le au moins un circuit de courant secondaire comprend le au moins un élément (L2) d'amortissement et le au moins un condensateur (C3) trapèze
    caractérisé
    en ce que le au moins un circuit de courant secondaire comprend exactement l'un du au moins un élément (L2) d'amortissement et l'un du au moins un condensateur (C3) trapèze qui sont montés mutuellement en série, le au moins un circuit de courant secondaire étant monté en parallèle au dispositif (T1) de commutation et/ou parallèle à la diode (D1) de roue libre.
  2. Ballast électronique suivant la revendication 1,
    caractérisé
    en ce que le dispositif (T1) de commutation et la diode (D1) de roue libre sont réalisés sous la forme de deux composants à semi-conducteurs distincts
  3. Ballast électronique suivant la revendication 2,
    caractérisé
    en ce que le dispositif (12) convertisseur de tension est conçu pour qu'il y passe du courant avant la commutation du dispositif (T1) de commutation et après la commutation de la diode (D1) de roue libre ou inversement et qu'entre ces deux phases, il passe du courant dans le au moins un circuit de courant secondaire
  4. Ballast électronique suivant l'une des revendications précédentes,
    caractérisé
    en ce qu'il y a exactement un circuit de courant secondaire ayant un montage série constitué d'un élément (L2) d'amortissement et d'un condensateur (C3) trapèze, ce circuit de courant secondaire étant monté en parallèle au dispositif (T1) de commutation ou en parallèle à la diode (D1) de roue libre.
  5. Ballast électronique suivant l'une des revendications 1 à 3,
    caractérisé
    en ce qu'il y a deux circuits de courant secondaires ayant respectivement un montage série constitué d'un élément (L2a, L2b) d'amortissement et d'un condensateur (C3a, C3b) trapèze, le premier circuit de courant secondaire étant monté en parallèle au dispositif (T1) de commutation et le deuxième circuit de courant secondaire en parallèle à la diode (D1) de roue libre
  6. Ballast électronique suivant l'une des revendications précédentes,
    caractérisé
    en ce que l'élément (L2, L2a, L2b) d'amortissement est constitué sous la forme d'un ferrite, d'une tôle de fer ou d'au moins une boucle conductrice.
  7. Ballast électronique suivant l'une des revendications précédentes,
    caractérisé
    en que au moins un élément (L2, L2a, L2b) d'amortissement est réalisé sous la forme d'un composant SMD.
EP05008806A 2004-05-07 2005-04-21 Ballast électronique pour une lampe Not-in-force EP1594349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004022571 2004-05-07
DE102004022571A DE102004022571A1 (de) 2004-05-07 2004-05-07 Elektronisches Vorschaltgerät für eine Lampe

Publications (2)

Publication Number Publication Date
EP1594349A1 EP1594349A1 (fr) 2005-11-09
EP1594349B1 true EP1594349B1 (fr) 2007-02-21

Family

ID=34935568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05008806A Not-in-force EP1594349B1 (fr) 2004-05-07 2005-04-21 Ballast électronique pour une lampe

Country Status (7)

Country Link
US (1) US7193372B2 (fr)
EP (1) EP1594349B1 (fr)
JP (1) JP4833584B2 (fr)
AT (1) ATE354933T1 (fr)
CA (1) CA2506368A1 (fr)
DE (2) DE102004022571A1 (fr)
TW (1) TWI422283B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005056255A1 (de) * 2005-11-25 2007-06-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsvorrichtung mit obenliegendem Buck-Transistor
KR100823194B1 (ko) * 2006-11-20 2008-04-18 삼성에스디아이 주식회사 플라즈마 표시 장치 및 그 구동 장치
US7579814B2 (en) * 2007-01-12 2009-08-25 Potentia Semiconductor Corporation Power converter with snubber
DE102008044372A1 (de) 2008-12-05 2010-06-10 Robert Bosch Gmbh Schaltungsanordnung für eine Leuchtvorrichtung, Leuchtvorrichtung und Verfahren
DE102016223153A1 (de) 2016-11-23 2018-05-24 Osram Gmbh Betreiben eines vorschaltgeräts für eine gasentladungslampe

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06101930B2 (ja) * 1988-09-16 1994-12-12 九州大学長 スイッチング電源装置
JPH05328714A (ja) * 1991-04-24 1993-12-10 Shindengen Electric Mfg Co Ltd Ｄｃ−ｄｃコンバータ
JP3261142B2 (ja) * 1991-05-15 2002-02-25 松下電工株式会社 放電灯点灯装置
JPH07274500A (ja) * 1994-03-24 1995-10-20 Sony Corp 電源回路
US5528111A (en) * 1994-12-02 1996-06-18 Motorola, Inc. Ballast circuit for powering gas discharge lamp
JP3036694U (ja) * 1995-03-20 1997-05-02 スーパー・３−ディー・オプティカル・エクィプメンツ・カンパニー・リミテッド 立体写真露光装置
US5932974A (en) * 1996-06-04 1999-08-03 International Rectifier Corporation Ballast circuit with lamp removal protection and soft starting
JP2859611B2 (ja) * 1998-04-17 1999-02-17 株式会社東芝 スイッチングレギュレータ
US5969484A (en) * 1998-05-14 1999-10-19 Optimum Power Conversion, Inc. Electronic ballast
JP3374916B2 (ja) * 2000-10-02 2003-02-10 サンケン電気株式会社 Ｄｃ−ｄｃコンバータ
US6465991B1 (en) * 2001-07-30 2002-10-15 Koninklijke Philips Electronics N.V. Switchable power converter with coupled inductor boost and coupled inductor SEPIC for multiple level input line power factor correction
US6965204B2 (en) * 2001-10-31 2005-11-15 Koninklijke Philips Electronics N.V. Ballasting circuit for optimizing the current in the take-over/warm-up phase
DE10200046A1 (de) * 2002-01-02 2003-07-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Betriebsgerät für Hochdruck-Entladungslampen

Also Published As

Publication number Publication date
DE102004022571A1 (de) 2005-12-08
US20050248293A1 (en) 2005-11-10
TWI422283B (zh) 2014-01-01
JP2005322652A (ja) 2005-11-17
DE502005000388D1 (de) 2007-04-05
TW200607402A (en) 2006-02-16
EP1594349A1 (fr) 2005-11-09
ATE354933T1 (de) 2007-03-15
JP4833584B2 (ja) 2011-12-07
US7193372B2 (en) 2007-03-20
CA2506368A1 (fr) 2005-11-07

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