EP1176851B1 - Betriebsgerät für Entladungslampen mit Schalterentlastung beim Vorheizen der Elektrodenwendeln - Google Patents
Betriebsgerät für Entladungslampen mit Schalterentlastung beim Vorheizen der Elektrodenwendeln Download PDFInfo
- 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
- Authority
- 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
Links
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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
- H05B41/16—Circuit 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
-
- 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 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)
Description
Claims (9)
- Elektronisches Vorschaltgerät für Gasentladungslampen mit beheizbaren Wenden, das folgende Merkmale aufweist:eine Gleichspannungsversorgung (DC) zwischen einem Zwischenkreispotenzial (P) und einem Bezugspotenzial (E),zwei in Serie geschaltete elektronische Schalter (S1, S2), die eine Halbbrücke mit Mittelpunktspotenzial (M) bilden, wobei einer der Schalter (S1) mit dem Zwischenkreispotenzial (P) und der andere (S2) mit dem Bezugspotenzial (E) verbunden ist und die Schalter (S1,S2) abwechselnd ein und ausschalten, damit am Mittelpunktspotenzial (M) eine Wechselspannung entsteht,ein Heiztransformator (L11, L12, L13) mit Kern, der sekundärseitig (L12, L13) Energie an die Wendeln (W1, W2) abgibt und primärseitig (L11) seine Energie aus der von der Halbbrücke erzeugten Wechselspannung bezieht
- Betriebsgerät nach Anspruch 1 dadurch gekennzeichnet, dass der Luftspalt mindestens 0,1 mm Breite hat.
- Betriebsgerät nach Anspruch 1 dadurch gekennzeichnet, dass parallel zu mindestens einem Halbbrückenschalter (S1, S2) ein Entlastungskondensator (CT) geschaltet ist.
- Betriebsgerät nach Anspruch 1 dadurch gekennzeichnet, dass die Lampen über einen Serienschwingkreis bestehend aus einer Lampendrossel (L2) und einem Resonanzkondensator (CR) an die Halbbrücke angeschlossen sind, wobei die Lampen parallel zum Resonanzkondensator (CR) liegen und dass der Strom durch die Lampen durch mindestens einen Koppelkondensator (CB2) fließen muss.
- Betriebsgerät nach Anspruch 1 dadurch gekennzeichnet, dass der Heiztransformator (L11, L12, L13) mindestens eine Lampenwendel (W1, W2) durch Parallelschaltung einer Sekundärwicklung (L12, L13) mit Heizstrom versorgt.
- Betriebsgerät nach Anspruch 5 dadurch gekennzeichnet, dass in Serie zu mindestens einer Sekundärwicklung (L12, L13) ein elektrisches Bauteil geschaltet ist, das den Fluss eines elektrischen Gleichstroms durch die betreffende Sekundärwicklung in mindestens einer Richtung verhindert.
- Betriebsgerät nach Anspruch 1 dadurch gekennzeichnet, dass die Primärwicklung (L11) des Heiztransformators (L11, L12, L13) in einem Primärkreis verschaltet ist, der parallel zu einem der beiden Halbbrückenschalter (S1, S2) liegt.
- Betriebsgerät nach Anspruch 7 dadurch gekennzeichnet, dass der Primärkreis aus der Serienschaltung der Primärwicklung (L11), einem weiteren Koppelkondensator (CB1) und einem weiteren elektronischen Schalter (S3) besteht.
- Betriebsgerät nach Anspruch 1 dadurch gekennzeichnet, dass die Halbbrücke um zwei weitere elektronische Schalter zur Vollbrücke erweitert ist.
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 (de) | 2002-01-30 |
EP1176851B1 true EP1176851B1 (de) | 2003-08-20 |
Family
ID=7650626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01115933A Expired - Lifetime EP1176851B1 (de) | 2000-07-28 | 2001-06-29 | Betriebsgerät für Entladungslampen mit Schalterentlastung beim Vorheizen der Elektrodenwendeln |
Country Status (9)
Country | Link |
---|---|
US (1) | US6483256B2 (de) |
EP (1) | EP1176851B1 (de) |
KR (1) | KR100813708B1 (de) |
CN (1) | CN100484359C (de) |
AT (1) | ATE247892T1 (de) |
AU (1) | AU779225B2 (de) |
CA (1) | CA2354192A1 (de) |
DE (2) | DE10036950A1 (de) |
TW (1) | TW508978B (de) |
Cited By (1)
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)
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 |
EP2441164A1 (de) * | 2009-06-11 | 2012-04-18 | Koninklijke Philips Electronics N.V. | Verfahren und schaltkreisanordnung zur erzeugung einer gepulsten spannung |
DE102010018325A1 (de) * | 2010-04-27 | 2011-10-27 | Automotive Lighting Reutlingen Gmbh | Verfahren und Ansteuerschaltung für den Start einer Gasentladungslampe |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
2000
- 2000-07-28 DE DE10036950A patent/DE10036950A1/de not_active Withdrawn
-
2001
- 2001-06-29 EP EP01115933A patent/EP1176851B1/de not_active Expired - Lifetime
- 2001-06-29 AT AT01115933T patent/ATE247892T1/de active
- 2001-06-29 DE DE50100512T patent/DE50100512D1/de not_active Expired - Lifetime
- 2001-07-05 TW TW090116485A patent/TW508978B/zh not_active IP Right Cessation
- 2001-07-24 US US09/910,793 patent/US6483256B2/en not_active Expired - Lifetime
- 2001-07-26 CA CA002354192A patent/CA2354192A1/en not_active Abandoned
- 2001-07-27 AU AU57693/01A patent/AU779225B2/en not_active Ceased
- 2001-07-27 KR KR1020010045491A patent/KR100813708B1/ko not_active IP Right Cessation
- 2001-07-30 CN CNB011246383A patent/CN100484359C/zh not_active Expired - Fee Related
Cited By (1)
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 |
---|---|
US20020047617A1 (en) | 2002-04-25 |
DE10036950A1 (de) | 2002-02-07 |
AU779225B2 (en) | 2005-01-13 |
EP1176851A1 (de) | 2002-01-30 |
US6483256B2 (en) | 2002-11-19 |
ATE247892T1 (de) | 2003-09-15 |
AU5769301A (en) | 2002-01-31 |
CN1345174A (zh) | 2002-04-17 |
CN100484359C (zh) | 2009-04-29 |
KR20020010549A (ko) | 2002-02-04 |
CA2354192A1 (en) | 2002-01-28 |
DE50100512D1 (de) | 2003-09-25 |
TW508978B (en) | 2002-11-01 |
KR100813708B1 (ko) | 2008-03-13 |
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