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EP0676121B1 - Ballast pour au moins une paire de lampes luminescentes a gaz fonctionnant en parallele - Google Patents

Ballast pour au moins une paire de lampes luminescentes a gaz fonctionnant en parallele Download PDF

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Publication number
EP0676121B1
EP0676121B1 EP93924069A EP93924069A EP0676121B1 EP 0676121 B1 EP0676121 B1 EP 0676121B1 EP 93924069 A EP93924069 A EP 93924069A EP 93924069 A EP93924069 A EP 93924069A EP 0676121 B1 EP0676121 B1 EP 0676121B1
Authority
EP
European Patent Office
Prior art keywords
discharge lamps
gas discharge
lamp
choke
inverter
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
EP93924069A
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German (de)
English (en)
Other versions
EP0676121A1 (fr
Inventor
Andreas SCHÖLL
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.)
Tridonic Bauelemente GmbH
Original Assignee
Tridonic Bauelemente GmbH
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6476455&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0676121(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Tridonic Bauelemente GmbH filed Critical Tridonic Bauelemente GmbH
Publication of EP0676121A1 publication Critical patent/EP0676121A1/fr
Application granted granted Critical
Publication of EP0676121B1 publication Critical patent/EP0676121B1/fr
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
    • 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
    • H05B41/2825—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 bridge converter in the final stage
    • H05B41/2827—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 bridge 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
    • 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase

Definitions

  • the invention relates to a ballast for at least one pair of gas discharge lamps operated in parallel according to the preamble of claim 1.
  • ballast technology it has been assumed in ballast technology that two separate resonant circuits are also required for two-lamp operation. This is because it has been assumed that when a common resonant circuit is used for both lamps, after the one lamp has been ignited, the resonant circuit voltage breaks down and is no longer sufficient to ignite the second lamp. As a rule, it can be assumed that both lamps are not lit at the same time.
  • the invention has for its object to simplify the known ballast.
  • the ballast according to the invention works with only a single resonant circuit despite the conceptual obstacle described above.
  • the cause apparently lies in the effect of the balancing transformer.
  • the current flowing through this lamp and the associated winding of the balancing transformer causes a voltage in the other winding which is superimposed on the voltage supplied by the resonant circuit (normally the voltages are compensated for by the two windings of the balancing transformer the opposite direction).
  • the above-described superimposition of the voltages on the lamp which has not yet ignited causes the lamp to also ignite.
  • the ignition of the lamp can be controlled by monitoring the lamp current. If it is found that after the first lamp has been ignited, the second Lamp does not ignite, so, as before, the frequency of the inverter can be lowered to near the resonance frequency of the resonant circuit, with the result that the ignition voltage on the second lamp, which has not yet ignited, is increased. This then usually leads to the ignition of the second lamp.
  • ballast If more than one pair of lamps is to be operated in parallel with a ballast, it is possible to provide for all lamp pairs either a common balancing transformer with a corresponding number of winding pairs with oppositely acting windings or a separate one for each lamp pair Balancing transformer with two opposing windings.
  • ballast An exemplary embodiment of a ballast according to the invention is described below with reference to the single drawing.
  • the ballast shown in the drawing has a bridge rectifier G, which is connected to the network.
  • the DC voltage generated by the rectifier G is fed to an inverter W R , which has an asymmetrical output.
  • the inverter W R is supplied with a DC voltage U DC generated by the rectifier G.
  • the inverter W R contains two switch elements connected in opposite directions in a known manner. The switching frequency can be changed. In this way, the inverter W R generates an AC voltage of variable frequency at its output.
  • a series resonance circuit is connected to the output of the inverter W R and consists of a choke L R and a resonance capacitor C R.
  • the alternating voltage dropping across the resonance capacitor C R is supplied to two pairs of lamps L 1 , L 2 and L 3 , L 4 to be supplied via an isolating capacitor C T.
  • the isolating capacitor C T can also be provided between the inverter W R and the choke L R. It is drawn in dashed lines in the drawing and is drawn with C T with a dash above.
  • a first balancing transformer T S1 is provided, which has two windings W S1 , W S2 acting in opposite directions. One end of these two windings is connected via the isolating capacitor C T to the connection point of the choke L R and the resonant capacitor C R. The other end of each of the two windings W S1 , W S2 is connected to an electrode of one of the two lamps L 1 , L 2 . The other electrode of the two lamps L 1 , L 2 is connected to ground via a resistor R 1 , R 2 .
  • the current flowing through the lamp L 1 generates a voltage drop U L1 across the resistor R 1 , which is used as a measured variable for the lamp current. Via the resistor R 2, a voltage UL drops 2, which is used as a measured variable for the lamp current of the lamp L2.
  • the lamps L 1 and L 2 are heated directly, the two heating filaments being connected by heating capacitors C H1 and C H2 .
  • a separate balancing transformer T S2 with two windings W ' S3 , W S4 acting in opposite directions is also provided.
  • the two windings are connected together at one end, and the connection point of the two windings is connected via the separating capacitor C T to the connection point of the inductor L R and the resonant capacitor C R.
  • the other ends of the two windings W S3 , W S4 are each connected to one electrode of the two lamps L 3 , L 4 .
  • the other electrodes of the two lamps L 3 , L 4 are directly connected here.
  • the connection point is connected to a connection point of two balancing capacitors C S1 , C S2 , which are connected in series between ground and the DC voltage potential U DC of the inverter W R.
  • the heating filaments of lamps L 3 , L 4 are heated by means of a heating transformer T H1 , T H2 .
  • a heating transformer T H1 , T H2 For this purpose, an input winding W H1, W H4 of the two heating transformers is supplied with a heating voltage U H.
  • the heating transformer T H1 has two output windings W H2 , W H3 , one of which is connected to a heating coil of the lamp L 3 .
  • the heating transformer T H2 has two output windings W H5, W H6 , each of which is connected to one of the two heating filaments of the lamp L 4 .
  • the frequency of the inverter W R is chosen so that it is relatively far above the resonance frequency of the choke L R and the resonant capacitor C R formed series resonant circuit. In this case, the voltage drop across the resonance capacitor C R is relatively small, so that none of the lamps can ignite. In this state, however, the heating filaments of the lamps are preheated (this applies in particular to lamps L 1 , L 2 ). After preheating the heating diapers, the frequency of the inverter W R is lowered, with the result that the voltage across the resonance capacitor increases the closer the frequency of the inverter W R approaches the resonance frequency of the series resonant circuit. When the voltage across the resonant capacitor C R is sufficiently high, one lamp of each pair of lamps ignites first.
  • the current flowing through the lamp induces in the winding of the corresponding balancing transformer associated with the other lamp a voltage which is superimposed on the ignition voltage of the other lamp, with the result that the other lamp also ignites. If the other lamp is not ignited, which can be determined, for example, in the case of lamps L 1 , L 2 by the voltages U L1 , U L2 , the frequency of the inverter W R is reduced further, so that it is even more the resonance frequency of the series resonance circuit is approaching. In this way, the ignition of the second lamp is ultimately forced.
  • ballast according to the invention it is essential that only a single series resonance circuit is provided for the two lamps of each lamp pair or for both lamp pairs. This measure allows the ballast according to the invention to be manufactured more easily and cheaply than previously.
  • a single balancing transformer (not shown) with four windings can be provided in the present case, two of which each act in opposite directions.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)

Claims (9)

  1. Ballast pour au moins un couple de lampes à décharge (L1, L2) fonctionnant en parallèle, comprenant un redresseur (G) à connecter au réseau à courant alternatif, un onduleur (WR) branché à la suite du redresseur, un transformateur de symétrie (Ts1) avec deux enroulements (Ws1, Ws2) qui agissent en opposition, qui sont reliés l'un à l'autre à une extrémité et dont l'autre extrémité est reliée chaque fois à une électrode de l'une des deux lampes à décharge (L1, L2), les autres électrodes des deux lampes à décharge (L1, L2) étant reliées entre elles, caractérisé par le fait qu'un seul circuit oscillant série formé d'une self (LR) et d'un condensateur de résonance (CR) est connecté à la sortie de l'onduleur (WR) pour les deux lampes à décharge (L1, L2), par le fait que le point de jonction des deux enroulements (Ws1, Ws2) du transformateur de symétrie (Ts1) est connecté côté courant alternatif au point de jonction de la self (LR) et du condensateur de résonance (CR).
  2. Ballast selon la revendication 1, caractérisé par le fait que pour alimenter un couple supplémentaire de lampes à décharge (L3, L4) fonctionnant en parallèle, il est prévu pour chaque couple de lampe (L1, L2, L3, L4) un transformateur de symétrie (Ts1; Ts2) propre, avec deux enroulements (Ws1, Ws2; Ws3, Ws4) qui agissent en opposition, qui sont reliés l'un à l'autre à une extrémité et dont l'autre extrémité est reliée chaque fois à une électrode de l'une des deux lampes à décharge (L1, L2; L3, L4) du couple de lampes concerné, les autres électrodes des deux lampes à décharge (L1, L2; L3, L4) étant reliées entre elles, par le fait qu'un seul circuit oscillant série formé d'une self (LR) et d'un condensateur de résonance (CR) est connecté à la sortie de l'onduleur (WR) pour les deux couples de lampes à décharge (L1, L2; L3, L4) et par le fait que le point de jonction des deux enroulements (Ws1, Ws2; Ws3, Ws4) de chaque transformateur de symétrie (Ts1; Ts2) est connecté côté courant alternatif au point de jonction de la self (LR) et du condensateur de résonance (CR).
  3. Ballast selon la revendication 1, caractérisé par le fait que pour alimenter des couple supplémentaires de lampes à décharge (L3, L4) fonctionnant en parallèle, il est prévu pour tous les couples de lampe un transformateur de symétrie unique avec un nombre de paires d'enroulements correspondant au nombre total de couples de lampes, avec des enroulements qui agissent en opposition, qui sont tous reliés entre eux à une extrémité et dont l'autre extrémité est reliée chaque fois à une électrode de l'une des deux lampes à décharge du couple de lampes concerné, les autres électrodes des deux lampes à décharge du couple concerné étant reliées entre elles, par le fait qu'un seul circuit oscillant série formé d'une self (LR) et d'un condensateur de résonance (CR) est connecté à la sortie de l'onduleur (WR) pour tous les couples de lampes à décharge et par le fait que le point de jonction des enroulements du transformateur de symétrie commun est connecté côté courant alternatif au point de jonction de la self (LR) et du condensateur de résonance (CR).
  4. Ballast selon l'une des revendications précédentes, caractérisé par le fait qu'une borne de sortie de l'onduleur (WR) est connectée à un potentiel de référence (masse) et que l'extrémité du condensateur de résonance (CR) éloignée de la self (LR) est connectée également à un potentiel de référence (masse).
  5. Ballast selon la revendication 1, caractérisé par le fait que les électrodes connectées entre elles des deux lampes à décharge du ou de chaque couple de lampes (L1, L2) sont reliées directement ou par l'intermédiaire de résistances au potentiel de référence (masse).
  6. Ballast selon la revendication 4, caractérisé par le fait que les électrodes connectées entre elles des deux lampes à décharge du ou de chaque couple de lampes (L3, L4) sont reliées directement ou par l'intermédiaire de résistances au point de jonction de deux condensateurs d'équilibrage (CS1, CS2) montés en série, par le fait que la borne éloignée du point de jonction de l'un des condensateurs d'équilibrage (CS2) est connectée au potentiel de référence (masse) et par le fait que la borne éloignée du point de jonction de l'autre condensateur d'équilibrage (CS1) est connecté au potentiel de tension continue (UDC) d'alimentation de l'onduleur (WR).
  7. Ballast selon l'une des revendications précédentes, caractérisé par le fait que le point de jonction entre les deux enroulements agissant en opposition du ou de chaque transformateur de symétrie est relié par l'intermédiaire d'un condensateur de séparation (CT) au point de jonction de la self (LR) et du condensateur de résonance (CR).
  8. Ballast selon l'une des revendications précédentes, caractérisé par le fait que la self (LR) est connectée directement à l'onduleur (WR).
  9. Ballast selon l'une des revendications 1 à 7, caractérisé par le fait que la self (LR) est connectée à l'onduleur (WR) par l'intermédiaire d'un condensateur de séparation (CT).
EP93924069A 1992-12-23 1993-10-28 Ballast pour au moins une paire de lampes luminescentes a gaz fonctionnant en parallele Expired - Lifetime EP0676121B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4243955 1992-12-23
DE4243955A DE4243955B4 (de) 1992-12-23 1992-12-23 Vorschaltgerät für mindestens ein parallel betriebenes Gasentladungslampen-Paar
PCT/EP1993/002995 WO1994015444A1 (fr) 1992-12-23 1993-10-28 Ballast pour au moins une paire de lampes luminescentes a gaz fonctionnant en parallele

Publications (2)

Publication Number Publication Date
EP0676121A1 EP0676121A1 (fr) 1995-10-11
EP0676121B1 true EP0676121B1 (fr) 1997-01-22

Family

ID=6476455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93924069A Expired - Lifetime EP0676121B1 (fr) 1992-12-23 1993-10-28 Ballast pour au moins une paire de lampes luminescentes a gaz fonctionnant en parallele

Country Status (9)

Country Link
EP (1) EP0676121B1 (fr)
AT (1) ATE148297T1 (fr)
AU (1) AU5371594A (fr)
DE (2) DE4243955B4 (fr)
ES (1) ES2097550T3 (fr)
FI (1) FI111791B (fr)
NO (1) NO308690B1 (fr)
WO (1) WO1994015444A1 (fr)
ZA (1) ZA939579B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69524593T2 (de) * 1995-09-27 2002-08-08 Koninklijke Philips Electronics N.V., Eindhoven Vorschaltgerät mit Symmetriertransformator für Leuchtstofflampen
AU3437097A (en) * 1996-06-25 1998-01-14 W.L. Gore & Associates Gmbh Flexible water and oil resistant composites
DE19625389A1 (de) * 1996-06-25 1998-01-02 Gore W L & Ass Gmbh Flexibler Verbundstoff
DE19715342C1 (de) * 1997-04-12 1998-12-17 Vossloh Schwabe Gmbh Vorschaltgerät für unabhängigen Parallelbetrieb von Niederdruck-Gasentladungslampen
DE19715341C1 (de) * 1997-04-12 1998-10-15 Vossloh Schwabe Gmbh Elektronisches Vorschaltgerät mit automatischem Wiederanlauf
US6069455A (en) 1998-04-15 2000-05-30 Electro-Mag International, Inc. Ballast having a selectively resonant circuit
US6310444B1 (en) * 2000-08-10 2001-10-30 Philips Electronics North America Corporation Multiple lamp LCD backlight driver with coupled magnetic components
DE10049842A1 (de) 2000-10-09 2002-04-11 Tridonic Bauelemente Schaltungsanordnung zum Betreiben von mehreren Gasentladungslampen
DE10134966A1 (de) 2001-07-23 2003-02-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe
US7309964B2 (en) 2004-10-01 2007-12-18 Au Optronics Corporation Floating drive circuit for cold cathode fluorescent lamp
DE102007054805A1 (de) * 2007-11-16 2009-05-20 Tridonicatco Schweiz Ag Schaltungsanordnung zum Betreiben von Gasentladungslampen, bspw. HID-Lampen
US9030119B2 (en) 2010-07-19 2015-05-12 Microsemi Corporation LED string driver arrangement with non-dissipative current balancer
DE102010063867A1 (de) * 2010-12-22 2012-06-28 Tridonic Gmbh & Co Kg Zündregelung und Zünderkennung von Gasentladungslampen
WO2012151170A1 (fr) 2011-05-03 2012-11-08 Microsemi Corporation Procédé d'excitation de del à haute efficacité

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412942C2 (de) * 1984-04-06 1986-02-20 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Elektronisches Vorschaltgerät für mehrere Leuchtstofflampen
DK339586D0 (da) * 1986-07-16 1986-07-16 Silver Gruppen Prod As Elektronisk ballast
US4902942A (en) * 1988-06-02 1990-02-20 General Electric Company Controlled leakage transformer for fluorescent lamp ballast including integral ballasting inductor
JPH03116689A (ja) * 1989-09-29 1991-05-17 Toshiba Lighting & Technol Corp 放電灯点灯装置
US5081401A (en) * 1990-09-10 1992-01-14 Motorola, Inc. Driver circuit for a plurality of gas discharge lamps
DE4039161C2 (de) * 1990-12-07 2001-05-31 Zumtobel Ag Dornbirn System zur Steuerung der Helligkeit und des Betriebsverhaltens von Leuchtstofflampen

Also Published As

Publication number Publication date
NO952517D0 (no) 1995-06-22
DE4243955B4 (de) 2010-11-18
ZA939579B (en) 1994-08-11
FI952655A (fi) 1995-05-31
DE4243955A1 (de) 1994-06-30
DE59305294D1 (de) 1997-03-06
NO952517L (no) 1995-06-22
ATE148297T1 (de) 1997-02-15
WO1994015444A1 (fr) 1994-07-07
FI111791B (fi) 2003-09-15
NO308690B1 (no) 2000-10-09
FI952655A0 (fi) 1995-05-31
ES2097550T3 (es) 1997-04-01
EP0676121A1 (fr) 1995-10-11
AU5371594A (en) 1994-07-19

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