EP1176851B1 - Dispositif pour lampe à décharge comportant un système de commutation pour le chauffage des électrodes - Google Patents

Dispositif pour lampe à décharge comportant un système de commutation pour le chauffage des électrodes Download PDF

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Publication number
EP1176851B1
EP1176851B1 EP01115933A EP01115933A EP1176851B1 EP 1176851 B1 EP1176851 B1 EP 1176851B1 EP 01115933 A EP01115933 A EP 01115933A EP 01115933 A EP01115933 A EP 01115933A EP 1176851 B1 EP1176851 B1 EP 1176851B1
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EP
European Patent Office
Prior art keywords
operating device
bridge
switches
switch
potential
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
EP01115933A
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German (de)
English (en)
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EP1176851A1 (fr
Inventor
Markus Heckmann
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
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Publication of EP1176851A1 publication Critical patent/EP1176851A1/fr
Application granted granted Critical
Publication of EP1176851B1 publication Critical patent/EP1176851B1/fr
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/16Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/26Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28Circuit 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
    • H05B41/295Circuit 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 operating device for discharge lamps according to the Preamble of claim 1. It is in particular a circuit in which the possibilities for heating electrode coils (W1, W2) improved are.
  • gas discharge lamps have a longer lifespan if their electrodes are heated before ignition.
  • the term is common for this Preheating.
  • the electrodes are designed as spirals for this
  • a preheating current is applied for the purpose of preheating.
  • the heart of this control gear is a half-bridge inverter with two half-bridge switches connected in series.
  • a heating current through the filaments may also be desired during operation of the lamp to maintain a certain coil temperature. This is especially when dimming a lamp.
  • a circuit for heating the filaments is disclosed in EP 0707438, which appears regardless of the operation of the gas discharge. This is done in parallel with one of the two half-bridge switches the primary winding (L11) of a heating transformer (L11, L12, L13) switched.
  • a coupling capacitor (CB1) is connected in series by essentially the same proportion of those supplied by the half-bridge AC voltage. Furthermore, in series with the primary winding There is also an electronic switch (S3), with which the heating of the filaments can be switched on and off, or by means of a pulse operation, the strength the heating can be adjusted.
  • the heating transformer (L11, L12, L13) has several secondary windings (L12, L13) that generate the heating current for the coils (W1, W2) deliver.
  • Some operating devices have spiral monitoring circuits, which are connected to a Work small direct current compared to lamp current. To the function of this Circuits must not interfere with the direct current flow through the secondary windings be prevented in at least one direction. This can be done through the Series connection of a capacitor or a diode to the respective secondary winding can be achieved. If only one lamp is operated, it is usually for each A secondary winding (L12, L13) is available. In exceptional cases heating of just one coil may also be desired. When operating several lamps connected in series suffice for the connected filaments common secondary winding. The possibility of free choice of heating current for the coils by appropriate dimensioning of the heating transformer and / or pulse operation, however, is restricted, as explained below.
  • An electronic control gear usually contains one, with the help of electronic ones Switch built generator, which compared to the mains voltage frequency emits high-frequency voltage. Suitable reactance secondary gates are used the energy provided to operate lamps.
  • the high operating frequency causes a high switching frequency of the electronic switches which makes it important is that the individual switching process of an electronic switch with as little loss as possible expires.
  • a number of circuit topologies are known from the literature, the one enable resonant or quasi-resonant switching and thus the switching losses keep low.
  • the half-bridge has established itself as a standard topology. It refers to one, between an intermediate circuit potential (P) and a reference potential (E) an operating voltage (DC) connected series circuit of two electronic Switches (S1, S2).
  • connection point (M) of the switches is alternately The switches are closed and opened alternately with the DC link potential (P) and the reference potential (E). Now a switch should be switched on cause a change in potential of the connection point (M), so lies first a high voltage is applied to the switch, which turns on during the switching process a low value. Because the switch is right at the beginning of the switching process High switching losses result. It is therefore to be sought that a switch is only turned on when there is only a small one on it Voltage is present. The half-bridge now offers the possibility of such a ZVS (Zero Voltage Switching).
  • connection point (M) changes the potential of the connection point (M) automatically (quasi-resonant) when opening a Switch from one potential of the operating voltage (DC) to the other without that the other switch has to be closed.
  • DC operating voltage
  • the other switch can be switched on with almost no loss.
  • a relief capacitor (CT) is connected to at least one of the two switches. This reduces the losses of the opening switch and the losses caused by the switching generated interference reduced.
  • the reactance second gate (Z) for coupling the lamps to the half-bridge usually contains a lamp choke (L2).
  • L2 lamp choke
  • an operating frequency can easily be determined can be set at which the load of the half-bridge acts inductively.
  • the heating transformer described above L11, L12, L13
  • the lamps are in the preheating phase, the contribution of the lamp choke (L2) to the load impedance is too weak to be a To ensure relief of the half-bridge switch (S1, S2) safely.
  • the inductance of the lamp choke (L2) can be adjusted become.
  • this is rarely possible because the lamp choke (L2) is for normal operation needs to be optimized.
  • CT capacitance of the relief capacitor
  • An operating device for gas discharge lamps is known from the document DE-A-31 37 796, which contains a heating transformer with an air gap.
  • Task in this scripture is to the lamp current of a fluorescent lamp with a transducer regulate, which has the smallest possible dimensions. This is initially done by an inductor, which is connected in parallel to the fluorescent lamp.
  • an inductor which is connected in parallel to the fluorescent lamp.
  • subclaim 2 of the document DE-A-31 37 796 forms a heating transformer with an air gap this inductance. Switching losses from half-bridge switches are in this slogan not treated.
  • the object of the present invention is an operating device according to the preamble of claim 1 to provide an almost voltage-free even in preheating Ensure that the half-bridge switches (S1, S2) are switched on.
  • the lamps are delivered to the half bridge at the midpoint potential (M) AC voltage connected via a reactance network.
  • a coupling capacitor is connected in series with the lamps (CB2) is necessary, which is the DC voltage component of the half bridge supplied AC voltage.
  • This coupling capacitor (CB2) can also be carried out twice, then one with the DC link potential (P) and one is connected to the reference potential (E).
  • the switching frequency is for ignition the half-bridge near the resonance frequency of the series resonance circuit (L2, CR).
  • the lamps are not lit during preheating, i.e. no lamp current flows.
  • the lamp voltage must not be high to prevent premature Avoid gas discharge in the lamp. That is why the current is through the Series resonance circuit low.
  • the load current is therefore essential for preheating influenced by the current in the primary winding of the heating transformer (L11, L12, L13).
  • the load must be switched off when a half-bridge switch (T1, T2) due to their inductive nature have enough energy stored to to bring about a change in potential of the connection point (M).
  • T1, T2 half-bridge switch
  • M connection point
  • the well-known heating transformers no air gap. At least one tries the manufacturing-related Keep the air gap as small as possible.
  • the heating transformer (L11, L12, L13) Save energy. This energy causes when switching off a half-bridge switch a potential change of the connection point (M) and thus an almost voltage-free, low-loss switch-on of the half-bridge switch (S1, S2).
  • the width of a manufacturing air gap in a non-transformer Should contain air gap is well below 0.1mm.
  • CB1 Coupling capacitor
  • S3 switch
  • This can either be the heating of the Switch the filaments (W1, W2) on and off or regulate the heating current in pulse mode.
  • the invention is explained in more detail below using an exemplary embodiment.
  • the figure shows a circuit in which the heating transformer (L11, L12, L13) according to the invention is provided with an air gap.
  • An operating voltage source supplies between an intermediate circuit potential (P) and a reference potential (E) a DC voltage to the circuit in the figure.
  • the half-bridge which consists of the Series connection of two switches is formed (S1, S2). At the connection point (M) the switch creates the half bridge compared to the mains voltage frequency high frequency AC voltage. There is a free-wheeling diode in parallel with each switch (D1, D2) switched.
  • a relief capacitor is located parallel to the upper switch (S1) (CT).
  • CT relief capacitor
  • first coupling capacitor (CB1) with a switch (S3) and the primary winding (L11) of the heating transformer (L11, L12, L13).
  • the primary circuit could have the same effect the coil can also be connected in parallel to the upper switch (S1).
  • the lamp choke (L2) is connected at the The junction (M) of the half-bridge switches (S1, S2) connected.
  • first lamp connection (A1) With the other end of the lamp choke is a first lamp connection (A1) connected.
  • the other connection of the resonance capacitor (CR) is with one Reference potential (E) of the operating voltage (DC) connected.
  • a second connection the lamp (A2) is also connected via a second coupling capacitor (CB2) the reference potential (E).
  • the resonance capacitor can be used instead of the reference potential (E) (CR) has the same effect on the second lamp connection (A2) be connected.
  • A3 Between the first (A1) and a third lamp connection (A3) is the first filament (W1) of the lamp (Lp). Parallel to this is a first secondary winding (L12) of the heating transformer (L11, L12, L13) switched.
  • W1 the first secondary winding
  • L12 the heating transformer
  • W2 second filament
  • Parallel to this is a second secondary winding (L13) of the Heating transformers (L11, L12, L13) switched.
  • the circuit can also be used for several in Series switched lamps can be used. According to the ones to be heated
  • the heating transformer (L11, L12, L13) must wind around additional secondary windings can be added.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (9)

  1. Régulateur électronique de puissance de wattage pour des lampes luminescentes à gaz comportant des électrodes pouvant être chauffées, qui présente les caractéristiques suivantes :
    une alimentation en tension continue (DC) entre un potentiel de circuit intermédiaire (P) et un potentiel de référence (E),
    deux interrupteurs électroniques (S1, S2) qui sont branchés en série et qui forment un demi-pont avec potentiel central (M), l'un des interrupteurs (S1) étant relié au potentiel de circuit intermédiaire (P) et l'autre (S2) au potentiel de référence (E) et les interrupteurs (S1, S2) étant fermés et ouverts en alternance pour créer une tension alternative au potentiel central (M),
    un transformateur de chauffage (L11, L12, L13) avec noyau qui délivre de l'énergie côté secondaire (L12, L13) aux électrodes (W1, W2) et qui tire son énergie côté primaire (L11) de la tension alternative produite par le demi-pont,
       caractérisé par le fait que le noyau du transformateur de chauffage comporte un entrefer efficace par rapport aux données électriques du transformateur de chauffage (L11, L12, L13).
  2. Appareil de commande selon la revendication 1, caractérisé par le fait que l'entrefer a au moins une largeur de 0,1 mm.
  3. Appareil de commande selon la revendication 1, caractérisé par le fait qu'un condensateur de décharge (CT) est branché en parallèle avec au moins un interrupteur en demi-pont (S1, S2).
  4. Appareil de commande selon la revendication 1, caractérisé par le fait que les lampes sont raccordées au demi-pont par l'intermédiaire d'un circuit oscillant série constitué d'une bobine de lampe (L2) et d'un condensateur de résonance (CR), les lampes étant en parallèle avec le condensateur de résonance (CR) et le courant qui passe dans les lampes devant passer dans au moins un condensateur de couplage (CB2).
  5. Appareil de commande selon la revendication 1, caractérisé par le fait que le transformateur de chauffage (L11, L12, L13) alimente en courant de chauffage au moins une électrode de lampe (W1, W2) via un branchement en parallèle d'un enroulement secondaire (L12, L13).
  6. Appareil de commande selon la revendication 5, caractérisé par le fait qu'il est branché en série avec au moins un enroulement secondaire (L12, L13) un composant électrique qui empêche le flux d'un courant électrique continu à travers l'enroulement secondaire concerné dans au moins une direction.
  7. Appareil de commande selon la revendication 1, caractérisé par le fait que l'enroulement primaire (L11) du transformateur de chauffage (L11, L12, L13) est branché dans un circuit primaire qui est en parallèle avec l'un des deux interrupteurs en demi-pont (S1, S2).
  8. Appareil de commande selon la revendication 7, caractérisé par le fait que le circuit primaire est constitué du circuit série formé de l'enroulement primaire (L11), d'un autre condensateur de couplage (CB1) et d'un autre interrupteur électronique (S3).
  9. Appareil de commande selon la revendication 1, caractérisé par le fait que le demi-pont est complété par deux autres interrupteurs électroniques pour donner un pont intégral.
EP01115933A 2000-07-28 2001-06-29 Dispositif pour lampe à décharge comportant un système de commutation pour le chauffage des électrodes Expired - Lifetime EP1176851B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10036950 2000-07-28
DE10036950A DE10036950A1 (de) 2000-07-28 2000-07-28 Betriebsgerät für Entladungslampen mit Schalterentlastung beim Vorheizen der Elektrodenwendeln

Publications (2)

Publication Number Publication Date
EP1176851A1 EP1176851A1 (fr) 2002-01-30
EP1176851B1 true EP1176851B1 (fr) 2003-08-20

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ID=7650626

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Application Number Title Priority Date Filing Date
EP01115933A Expired - Lifetime EP1176851B1 (fr) 2000-07-28 2001-06-29 Dispositif pour lampe à décharge comportant un système de commutation pour le chauffage des électrodes

Country Status (9)

Country Link
US (1) US6483256B2 (fr)
EP (1) EP1176851B1 (fr)
KR (1) KR100813708B1 (fr)
CN (1) CN100484359C (fr)
AT (1) ATE247892T1 (fr)
AU (1) AU779225B2 (fr)
CA (1) CA2354192A1 (fr)
DE (2) DE10036950A1 (fr)
TW (1) TW508978B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010023814A1 (de) 2009-06-25 2011-02-03 Sebastian Bartlakowski Schaltungsanordnung zum Betreiben von Entladungslampen

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10160790A1 (de) * 2001-01-12 2002-08-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Einschalten einer Teilschaltungsanordnung
US7122972B2 (en) * 2003-11-10 2006-10-17 University Of Hong Kong Dimmable ballast with resistive input and low electromagnetic interference
US7187132B2 (en) * 2004-12-27 2007-03-06 Osram Sylvania, Inc. Ballast with filament heating control circuit
DE102005022592A1 (de) * 2005-05-17 2006-11-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung zum Betrieb einer Entladungslampe mit schaltbarem Resonanzkondensator
DE102008004787A1 (de) * 2008-01-17 2009-07-23 Bag Electronics Gmbh Zündgerät mit zwei Eingangspolen
DE102008039351B3 (de) * 2008-08-22 2010-01-28 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung zum Betrieb mindestens einer Halbleiterlichtquelle
DE102009020849A1 (de) * 2009-05-12 2010-11-18 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung zum Betreiben einer Niederdruck-Gasentladungslampe und entsprechendes Verfahren
WO2010143125A1 (fr) * 2009-06-11 2010-12-16 Koninklijke Philips Electronics N.V. Procédé et agencement de circuit permettant de générer une tension pulsée
DE102010018325A1 (de) * 2010-04-27 2011-10-27 Automotive Lighting Reutlingen Gmbh Verfahren und Ansteuerschaltung für den Start einer Gasentladungslampe

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US4297616A (en) * 1980-03-17 1981-10-27 Xerox Corporation Fluorescent lamp with incandescent ballasting systems
DE3137796A1 (de) * 1981-09-23 1983-03-31 Peter 7753 Allensbach Altmann Schaltanordnung zur stufenlosen steuerung von leuchtstofflampen insbesonders bei hoher betriebsfrequenz
US5173643A (en) * 1990-06-25 1992-12-22 Lutron Electronics Co., Inc. Circuit for dimming compact fluorescent lamps
US5424614A (en) * 1994-03-03 1995-06-13 Usi Lighting, Inc. Modified half-bridge parallel-loaded series resonant converter topology for electronic ballast
KR0144500B1 (ko) * 1994-10-29 1998-10-01 천병기 역기전력을 이용한 형광등용 전자식 스타터
DE19520999A1 (de) * 1995-06-08 1996-12-12 Siemens Ag Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen
US6094016A (en) * 1997-03-04 2000-07-25 Tridonic Bauelemente Gmbh Electronic ballast

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010023814A1 (de) 2009-06-25 2011-02-03 Sebastian Bartlakowski Schaltungsanordnung zum Betreiben von Entladungslampen

Also Published As

Publication number Publication date
CN1345174A (zh) 2002-04-17
DE50100512D1 (de) 2003-09-25
KR100813708B1 (ko) 2008-03-13
CN100484359C (zh) 2009-04-29
ATE247892T1 (de) 2003-09-15
CA2354192A1 (fr) 2002-01-28
US20020047617A1 (en) 2002-04-25
US6483256B2 (en) 2002-11-19
DE10036950A1 (de) 2002-02-07
KR20020010549A (ko) 2002-02-04
AU779225B2 (en) 2005-01-13
TW508978B (en) 2002-11-01
EP1176851A1 (fr) 2002-01-30
AU5769301A (en) 2002-01-31

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