EP1590993B1 - Ballast electronique - Google Patents

Ballast electronique Download PDF

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Publication number
EP1590993B1
EP1590993B1 EP04707218A EP04707218A EP1590993B1 EP 1590993 B1 EP1590993 B1 EP 1590993B1 EP 04707218 A EP04707218 A EP 04707218A EP 04707218 A EP04707218 A EP 04707218A EP 1590993 B1 EP1590993 B1 EP 1590993B1
Authority
EP
European Patent Office
Prior art keywords
lamp
discharge lamp
preheating
circuit
sub
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
EP04707218A
Other languages
German (de)
English (en)
Other versions
EP1590993A1 (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.)
HEP Tech Co Ltd
Original Assignee
HEP Tech Co Ltd
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 HEP Tech Co Ltd filed Critical HEP Tech Co Ltd
Publication of EP1590993A1 publication Critical patent/EP1590993A1/fr
Application granted granted Critical
Publication of EP1590993B1 publication Critical patent/EP1590993B1/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 a ballast for Niederdruokentladungslampen, with a controllable inverter circuit for generating a high-frequency supply voltage for a discharge lamp, a connected to the inverter circuit lamp inductor connected in series with the lamp inductor and connected in parallel to the discharge lamp lamp parallel capacitor and a preheating circuit for supplying the electrodes the discharge lamp with heating current, wherein the preheating circuit is powered by a mounted on the lamp inductor auxiliary winding with electricity.
  • a ballast for low-pressure discharge lamps is for example from the DE 199 20 030 A1 known.
  • the electrodes of the discharge lamp designed as heating coils are preheated, so that they are excited to emit the glow.
  • the frequency of the supply voltage is changed by means of the controllable inverter circuit from a preheat frequency to an operating frequency.
  • the series resonant circuit formed by the lamp choke and the lamp parallel capacitor comes into resonance, so that an ignition voltage sufficient for ignition is applied to the discharge lamp.
  • the previously known ballast has a heating transformer whose primary winding is connected in series with the lamp parallel capacitor.
  • the secondary windings of the heating transformer supply them as heating coils formed electrodes of the discharge lamp with heating current.
  • the voltage applied to the primary winding of the heating transformer preheating is thus determined solely by the voltage drop across the lamp parallel capacitor. During the transition from the preheating frequency to the operating frequency, this voltage increases, so that the heating current increases as well.
  • the heating current is limited by the saturation occurring in the heating transformer.
  • the voltage applied to the lamp parallel capacitor breaks down to the operating voltage of the lamp. Accordingly, the heating current flowing in the operating state through the heating coils of the electrodes is reduced.
  • a disadvantage of the prior art ballast that even during continuous operation of the discharge lamp, a continuous heating current flows, resulting in increased energy consumption.
  • the primary winding of the Helz transformer flows continuously through the reactive current flowing through the lamp parallel capacitor.
  • a further disadvantage is that, in the case of the previously known ballast, when the discharge lamp is switched on, an undesirably high heating current flows through the cold heating coils of the electrodes of the discharge lamp. The heating current is limited only by the saturation of the heating transformer. If the previously known ballast for discharge lamps is used with particularly sensitive electrodes, it can lead to the destruction of the heating coils.
  • a ballast of the type mentioned is from the DE 33 12 572 A1 known.
  • the electrodes of the discharge lamp consist of heating wires, each of which is connected to auxiliary windings mounted on the lamp choke. Between each auxiliary winding and the associated heating wire, a switching element in the form of a Zener diode is connected.
  • the voltages supplied by the auxiliary windings exceed the switching thresholds of the zener diodes.
  • the heating wires are supplied with power in the ignition phase.
  • the resonant circuit formed by the lamp inductor and the lamp parallel capacitor is attenuated by the discharge lamp.
  • voltages are now generated, which are the switching thresholds of Zener diodes no longer exceed, so that the heating of the electrodes in the ignited state is omitted.
  • the present invention has the object to provide an electronic ballast for low-pressure discharge lamps, in which caused by the preheating circuit losses are minimized and which is universal, especially for discharge lamps with sensitive electrodes, can be used.
  • the preheating circuit of the ballast is supplied with current by an auxiliary winding mounted on the lamp choke, it is achieved that the power supply of the preheating circuit is independent of the reactive current flowing through the lamp parallel capacitor.
  • the auxiliary winding on the lamp inductor there is also the advantage that the heating current during the switch-on can be increased slowly by the frequency of the supply voltage from the preheating is slowly lowered to the operating frequency. As a result, an excessive and thus for the electrodes of the discharge lamp harmful heating current avoided.
  • the power supply of the preheating circuit can be interrupted by means of the parallel resonant circuit during the continuous operation of the lamp. As a result, unwanted losses due to a continuously flowing during the operation of the lamp heating current are effectively prevented.
  • the preheating circuit has a heating transformer whose primary winding is connected to the auxiliary winding and whose secondary windings are connected to the electrodes of the discharge lamp.
  • the primary winding is thus fed by the mounted on the lamp inductor auxiliary winding, wherein in each case a secondary winding is provided for heating an electrode of the discharge lamp.
  • the saturation occurring during strong current flow through the lamp inductor in the heating transformer can be utilized to limit the heating current.
  • the heating transformer may be formed as a toroidal transformer.
  • the frequency of the supply voltage by means of the controllable inverter circuit from the preheating frequency for preheating the electrodes to the different operating frequency for continuous operation of the discharge lamp is variable.
  • the interruption of the power supply of the preheating circuit according to the invention is achieved in that between the arranged on the lamp inductor auxiliary winding and the preheating circuit switched parallel resonant circuit is tuned to the operating frequency of the discharge lamp.
  • ballast according to the invention An embodiment of the ballast according to the invention will be explained with reference to the circuit sketched in the drawing.
  • At one of two electronic switches T 1 and T 2 existing half-bridge is a supply voltage U b .
  • the consisting of the two electronic switches T 1 and T 2 half-bridge circuit forms part of a controllable inverter circuit for generating a high-frequency supply voltage for a discharge lamp 1.
  • the electronic switches T 1 and T 2 are alternately switched on and off by an electronic control circuit not shown in accordance with the desired frequency of the supply voltage.
  • the discharge lamp 1 is connected via a throttle L 1 with the existing of the two switches T 1 and T 2 half-bridge.
  • a lamp parallel capacitor C 1 is connected in series with the discharge lamp 1 and with the lamp inductor L 1 in series.
  • a preheating circuit is provided, via which electrodes 2 and 3 of the discharge lamp 1 are supplied with heating current.
  • the preheating circuit consists of a toroidal transformer 4 whose secondary windings 5 and 6 are connected to the electrodes 2 and 3.
  • the preheating circuit is powered by a mounted on the lamp inductor L 1 auxiliary winding 7 with power.
  • the auxiliary winding 7 is connected to a primary winding 8 of the toroidal transformer 4, wherein a parallel resonant circuit 9 is connected between the auxiliary winding 7 and the primary winding 8.
  • the parallel resonant circuit 9 is tuned to the operating frequency of the discharge lamp 1, such that during the continuous operation of the discharge lamp 1, only a minimal current flows through the primary winding 8 of the toroidal transformer 4.
  • capacitors C k1 and C k2 are provided, which serve for Gieichstromentkopplung.
  • For DC-DC coupling is also used between the lamp inductor L 1 and the discharge lamp 1 connected capacitor C h .
  • the series resonant circuit consisting of the inductor L 1 and the lamp parallel capacitor C 1 resonates, so that an ever-increasing voltage is applied to the discharge lamp 1.
  • the discharge lamp 1 ignites and the voltage breaks down to the operating voltage of the discharge lamp 1.
  • the parallel resonance circuit 9 is in resonance, so that the heating current flowing through the electrodes 2 and 3 is greatly reduced. During continuous operation of the lamp 1 thus only a minimum heating current flows through the electrodes 2 and 3.

Landscapes

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

Claims (3)

  1. Ballast pour des lampes de décharge basse pression, avec un montage d'onduleur apte à être commandé pour la production d'une tension d'alimentation haute fréquence pour une lampe à décharge (1), un étranglement de lampe (L1), relié au montage d'onduleur, un condensateur parallèle de lampe (C1) monté en série avec l'étranglement de lampe (L1) et commuté parallèlement à la lampe à décharge (1) et avec un montage de préchauffage pour l'alimentation des électrodes (2, 3) de la lampe à décharge (1) en courant de chauffage, où le montage de préchauffage est alimenté en courant par un enroulement auxiliaire (7) monté sur l'étranglement de lampe (L1),
    caractérisé en ce qu'
    au moyen du montage d'onduleur apte à être commandé, la fréquence de la tension d'alimentation est modifiable d'une fréquence de préchauffage pour le préchauffage des électrodes (2, 3) à une fréquence de fonctionnement différente de celle-ci pour le fonctionnement en continu de la lampe à décharge (1), où l'enroulement auxiliaire (7) est relié au montage de préchauffage par un circuit de résonance parallèle (9) qui est accordé à la fréquence de fonctionnement de telle sorte que pendant le fonctionnement continu de la lampe à décharge (1), l'alimentation en courant du montage de préchauffage soit interrompue.
  2. Ballast selon la revendication 1, caractérisé en ce que le montage de préchauffage présente un transformateur de chauffage (4) dont l'enroulement primaire (8) est relié à l'enroulement auxiliaire (7) et dont les enroulements secondaires (5, 6) sont reliés aux électrodes (2, 3) de la lampe à décharge (1).
  3. Ballast selon la revendication 2, caractérisé en ce que le transformateur de chauffage (4) est réalisé comme transformateur toroïdal.
EP04707218A 2003-02-04 2004-02-02 Ballast electronique Expired - Lifetime EP1590993B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10304544 2003-02-04
DE10304544A DE10304544B4 (de) 2003-02-04 2003-02-04 Elektronisches Vorschaltgerät
PCT/EP2004/000921 WO2004071135A1 (fr) 2003-02-04 2004-02-02 Ballast electronique

Publications (2)

Publication Number Publication Date
EP1590993A1 EP1590993A1 (fr) 2005-11-02
EP1590993B1 true EP1590993B1 (fr) 2009-05-27

Family

ID=32730743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04707218A Expired - Lifetime EP1590993B1 (fr) 2003-02-04 2004-02-02 Ballast electronique

Country Status (6)

Country Link
US (1) US7279844B2 (fr)
EP (1) EP1590993B1 (fr)
CN (1) CN1748447B (fr)
AT (1) ATE432606T1 (fr)
DE (2) DE10304544B4 (fr)
WO (1) WO2004071135A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005057107B4 (de) * 2004-11-25 2013-11-14 Kk Elektrotechnik Gmbh Vorschaltgerät
CN101170863A (zh) * 2006-10-27 2008-04-30 马士科技有限公司 一种电流激励无磁环反馈式镇流器
US8232727B1 (en) 2009-03-05 2012-07-31 Universal Lighting Technologies, Inc. Ballast circuit for a gas-discharge lamp having a filament drive circuit with monostable control
KR101658210B1 (ko) * 2010-02-19 2016-09-21 페어차일드코리아반도체 주식회사 예열 제어 장치, 이를 포함하는 램프 구동 장치및 예열 제어 방법

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510681A (en) * 1978-03-20 1996-04-23 Nilssen; Ole K. Operating circuit for gas discharge lamps
FR2446579A1 (fr) 1978-11-10 1980-08-08 Abadie Henri Perfectionnements aux dispositifs d'alimentation de tube fluorescent
DE3312572A1 (de) * 1983-04-08 1984-10-18 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Elektronisches vorschaltgeraet fuer eine leuchtstofflampe
MX9102104A (es) * 1990-12-19 1992-06-01 Philips Nv Adaptacion para desconectar el electrodo de una lampara fluorescente
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
EP0602719B1 (fr) * 1992-12-16 1998-10-21 Koninklijke Philips Electronics N.V. Onduleur haute fréquence pour alimenter une lampe à décharge munie d'électrodes de préchauffage
US5656891A (en) * 1994-10-13 1997-08-12 Tridonic Bauelemente Gmbh Gas discharge lamp ballast with heating control circuit and method of operating same
JP3484863B2 (ja) * 1995-03-29 2004-01-06 東芝ライテック株式会社 電源装置、放電灯点灯装置および照明装置
DE19520999A1 (de) * 1995-06-08 1996-12-12 Siemens Ag Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen
BE1009717A3 (nl) * 1995-10-20 1997-07-01 Philips Electronics Nv Schakelinrichting.
US5920155A (en) * 1996-10-28 1999-07-06 Matsushita Electric Works, Ltd. Electronic ballast for discharge lamps
US5959408A (en) * 1997-08-07 1999-09-28 Magnetek, Inc. Symmetry control circuit for pre-heating in electronic ballasts
EP0986937A1 (fr) * 1998-04-02 2000-03-22 Koninklijke Philips Electronics N.V. Systeme de circuit
US5973455A (en) 1998-05-15 1999-10-26 Energy Savings, Inc. Electronic ballast with filament cut-out
US6111369A (en) * 1998-12-18 2000-08-29 Clalight Israel Ltd. Electronic ballast
DE19920030A1 (de) * 1999-04-26 2000-11-09 Omnitronix Inc Elektronisches Vorschaltgerät
WO2000069226A1 (fr) * 1999-05-06 2000-11-16 Koninklijke Philips Electronics N.V. Circuit
DE19923083A1 (de) * 1999-05-20 2001-01-04 Hueco Electronic Gmbh Vorschaltgerät für Niederdruckentladungslampen
DE10102837A1 (de) * 2001-01-22 2002-07-25 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Betriebsgerät für Gasentladungslampen mit Abschaltung der Wendelheizung

Also Published As

Publication number Publication date
DE10304544B4 (de) 2006-10-12
CN1748447B (zh) 2010-06-16
US20060103327A1 (en) 2006-05-18
DE10304544A1 (de) 2004-08-19
ATE432606T1 (de) 2009-06-15
WO2004071135A1 (fr) 2004-08-19
DE502004009526D1 (de) 2009-07-09
US7279844B2 (en) 2007-10-09
CN1748447A (zh) 2006-03-15
EP1590993A1 (fr) 2005-11-02

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