EP1326486A1 - Circuit d'operation de lampes à décharge avec électrodes de prechauffage - Google Patents
Circuit d'operation de lampes à décharge avec électrodes de prechauffage Download PDFInfo
- Publication number
- EP1326486A1 EP1326486A1 EP02027136A EP02027136A EP1326486A1 EP 1326486 A1 EP1326486 A1 EP 1326486A1 EP 02027136 A EP02027136 A EP 02027136A EP 02027136 A EP02027136 A EP 02027136A EP 1326486 A1 EP1326486 A1 EP 1326486A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- operating
- operating circuit
- lamp
- preheating
- 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.)
- Granted
Links
Images
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/02—High frequency starting operation for fluorescent lamp
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/05—Starting and operating circuit for fluorescent lamp
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/07—Starting and control circuits for gas discharge lamp using transistors
Definitions
- the invention relates to an operating circuit for a Discharge lamp with preheatable electrodes.
- the electrodes to be preheated should be, for the preheating operation of the operating circuit Exploit resonant circuit resonance.
- the electrodes to be preheated to a frequency generator Operating circuit be connected and on the other hand via a Capacitor and optional additional components of a preheater be connected.
- the preheating device thus contains an oscillating circuit, during which vibrations current flows through the electrodes. If the operating device generates an oscillation in the resonant circuit, the electrodes are accordingly preheated.
- the preheating mode can be ended, for example, by heating a PTC thermistor.
- the present invention is based on the technical problem, a Operating circuit for discharge lamps with preheatable electrodes specify which has an improved preheater.
- the operating circuit is designed for this is to generate an alternating voltage at the start of operation, the one Resonance frequency of the resonant circuit containing frequency range drive through and the response of the resonant circuit by measuring an electrotechnical quantity so that the resonance frequency identified and the lamp preheated with this resonance frequency can.
- the invention proceeds from that cited in the unpublished Patent application already contained basic idea, a resonant circuit and use its resonance for preheating. It continues from an operating circuit in which the operating frequency of the Operating circuit can be changed and adjusted.
- the invention suggests a frequency range after the start of operation Search resonance frequency of the resonant circuit, which is selected so that it can be safely assumed that the resonance frequency in it Find.
- the resonance frequency can, for example, by Determining the amplitude of a voltage value or a current value be identified.
- the frequency range does not have to be complete drive through, rather the drive through can be stopped, if the resonance frequency has already been found. For example one could look for increasing voltage or current values and a drop in the values suggest that the maximum was run through and define this maximum as a resonance peak.
- the resonant frequency of the resonant circuit can thus be identified and used for the subsequent preheating process.
- a particularly efficient preheating can be ensured in this way which, on the other hand, is influenced by component tolerances or temperature fluctuations, which can change inductances, for example, excluded are.
- Another advantageous possibility consists of the amount of detected amplitude in the resonance peak conclusions on the type of a used discharge lamp to pull. Because if that Operating circuit is designed so that not only the operating frequency, but other operating parameters are adjustable, so it can be used for different lamp types can be used. Is particularly comfortable this procedure if the operating circuit turns on automatically sets the lamp type used. The lamp type can of course by an additional coding of the lamp can be detected. Simpler and However, it is more convenient to have the existing technical properties of the Use lamp for detection. In particular, the ohmic. Resistance of the lamp electrodes in different lamp types differently. As a result, there are various damping effects Resonance that is captured and used to draw conclusions about the lamp type can be. The operating circuit can then be the appropriate one Set operating parameters.
- the detection of the lamp type can also be useful if basically only one lamp type is provided. It can then be prevented be that a mechanically fitting, but electrotechnical unsuitable lamp type is used and operated. In this case the operating circuit could detect the wrong type of lamp Refuse to switch on.
- a preheating transformer is preferred Preheater, as already quoted in the unpublished Pre-registration is presented.
- the related disclosure content, especially with regard to the various connection options and design variants for the resonant circuit is hereby expressly stated in Referred.
- two secondary windings of the Preheating transformer each with one of the electrodes Discharge lamp can be connected in order to be able to preheat it.
- the preheating transformer must be connected to the resonant circuit, it is preferred that the resonant circuit is on the primary side, that is Primary winding is connected to the resonant circuit. This allows the corresponding vibrations in the resonant circuit by a Start the frequency generator of the operating circuit without on the Need to translate the voltage level of the secondary side.
- An inexpensive way to measure the response of the Resonant circuit to identify the resonance frequency and possibly also to determine the strength of the resonance with regard on the lamp type recognition is the measurement of the maximum amplitude of the Voltage on the primary winding of the preheating transformer. This will this voltage is preferably rectified, as in the exemplary embodiment shown.
- the frequency generator of the operating circuit is preferably in the form of a realized digital control that generates digital frequencies. It can Passing through the frequency range according to the invention take place step by step. In this respect, it is not the actual resonance frequency, but the corresponding incremental next frequency recorded. Basically it plays no matter for the technical function of the invention, whether the Resonance frequency is exactly hit. For the purpose of preheating only the excessive resonance can be used. Because of the Attenuation of the resonance due to the ohmic resistances of the electrodes the response is generally not very narrow anyway, so the Resonance frequency should only be roughly hit.
- a favorable order of magnitude for the resonance frequency is the double operating frequency of the operating circuit in continuous operation of the Discharge lamp.
- Typical orders of magnitude can be, for example 80 - 100 kHz for the resonance frequency and about 40 - 50 kHz for the Continuous operating frequency.
- FIG 1 is an electronic ballast as the invention Operating circuit shown.
- LP is a low pressure discharge lamp referred to, the preheatable spiral electrodes are shown.
- G denotes an AC voltage generator, which is a digital controller with digital frequency definition and facilities for the in Figure 2 and the associated description explains the process.
- On one Output A becomes a high frequency AC voltage with respect to a Reference ground potential M specified. It can be, for example Half-bridge oscillator with two controlled by a digital control Act switching transistors.
- the Parallel resonance capacitor C14 and the primary winding T11 form one Resonant circuit with a resonance frequency determined by these quantities.
- the resonance frequency is designed to be about twice the continuous operating frequency equivalent.
- the choice of double continuous operating frequency has the advantage that with the continuous operating frequency no vibration excitation of the Resonant circuit. Since almost square wave voltages are used and these have essentially odd harmonics is one Frequency choice close to twice the operating frequency cheap. A range of +/- 20% of twice the operating frequency is preferred.
- the preheating transformer has two secondary windings T12 and T13, said loose coupling between the secondary windings and the primary winding T11 shown in Figure 1 with the dashed lines is.
- the secondary windings T12 and T13 are each with the electrodes the discharge lamp LP connected, so in the secondary windings induced currents flow through the electrodes. Therefore the Resonant circuit from the parallel resonance capacitor C14 and Primary winding T11 together with the secondary windings T12 and T13 as a preheater.
- the resonant frequency is the resonant circuit in continuous operation in the Low resistance compared to the trapezoidal capacitor C13 and therefore does not interfere the functions of the operating circuit in continuous operation. In continuous operation so there are only very small voltages on the primary winding T11, so the resulting additional heating currents in the spiral electrodes are negligible.
- the frequency generator G is supposed to be the resonant circuit with a frequency in the immediate vicinity of its resonance frequency energize so that large currents flow through the primary winding T11 and corresponding preheating currents in the secondary windings T12 and T13 induced.
- the invention now provides that the digital control of the Frequency generator G a certain frequency range at the start of operation passes through the resonance frequency of the resonant circuit C14, T11, around the To search for resonance frequency to a certain extent. This is exemplified in FIG shown.
- the resonance frequency is around 90 kHz supposed.
- the frequency of the half-bridge oscillator in the Frequency generator set to 95 kHz by the digital control.
- the digital control measures the voltage at the primary winding T11 or on the parallel resonance capacitor C14 (UC14) and searches during the in Figure 2 depicted the maximum value of this voltage to the Identify resonance frequency. This maximum value is shown in FIG Umax abbreviated. It is stored in a memory of the digital control and is initially at 0.
- the voltage UC14 is measured and judged whether it is greater than Umax is. Since Umax is still at 0, this question is answered in the affirmative. So that can according to the arrow pointing to the right, the measured value for UC14 can be stored as a new value for Umax. Accordingly, the predefined half-bridge frequency (fHB) of 95 kHz as the resonance frequency fres stored in another memory.
- fHB half-bridge frequency
- the half-bridge frequency becomes around 1 kHz, for example reduced, is now 94 kHz.
- the next question is whether the Half-bridge frequency is greater than 85 kHz, is therefore affirmed, so that the process of measuring the voltage UC14 runs back.
- the digital control can be used for preheating determined correct resonance frequency of the resonant circuit C14, T11 perform, the resonance frequency regardless of fluctuations due to temperature changes or component fluctuations between different individual operating circuits apply.
- the digital control for preheating such as the preheating time, and also for the subsequent continuous operation that for the corresponding one Set the appropriate parameter for the lamp type.
- FIG. 3 shows an exemplary course of a representation of the Primary winding voltage UC14 on an oscillograph.
- the actual voltage UC14 is plotted with the range changing frequency oscillates while in the upper range the rectified and smoothed voltage is shown, which is actually the Measurement by the digital controller is based. From the left edge of the Figure up to the dashed vertical line is the one based on Figure 2 explained frequency sweep from 95 kHz to 85 kHz performed. It's closed recognize that the voltage UC14 in between a maximum has accepted.
- the digital control closes the corresponding frequency value so that the preheating operation is on the right from the dashed vertical line with the resonance frequency can be carried out.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10200053A DE10200053A1 (de) | 2002-01-02 | 2002-01-02 | Betriebsgerät für Entladungslampen mit Vorheizeinrichtung |
| DE10200053 | 2002-01-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1326486A1 true EP1326486A1 (fr) | 2003-07-09 |
| EP1326486B1 EP1326486B1 (fr) | 2005-10-26 |
Family
ID=7711456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02027136A Expired - Lifetime EP1326486B1 (fr) | 2002-01-02 | 2002-12-04 | Circuit d'operation de lampes à décharge avec électrodes de prechauffage |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6753659B2 (fr) |
| EP (1) | EP1326486B1 (fr) |
| CN (1) | CN100527913C (fr) |
| AT (1) | ATE308226T1 (fr) |
| CA (1) | CA2415512A1 (fr) |
| DE (2) | DE10200053A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015600A1 (fr) * | 2006-07-31 | 2008-02-07 | Koninklijke Philips Electronics N.V. | Procédé et circuit de chauffage d'une électrode de lampe à décharge |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10345610A1 (de) * | 2003-09-29 | 2005-05-12 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Verfahren zum Betreiben mindestens einer Niederdruckentladungslampe |
| DE102004044180A1 (de) * | 2004-09-13 | 2006-03-16 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Elektronisches Vorschaltgerät mit Pumpschaltung für Entladungslampe mit vorheizbaren Elektroden |
| DE102006010996A1 (de) * | 2006-03-09 | 2007-09-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer elektrischen Lampe |
| GB2437755A (en) * | 2006-05-02 | 2007-11-07 | Koen Geirnaert | Controlling gas discharge lamps |
| TW200744405A (en) * | 2006-05-16 | 2007-12-01 | Delta Electronics Inc | Driving circuit for multiple discharge lamps |
| US7560868B2 (en) * | 2007-05-11 | 2009-07-14 | Osram Sylvania, Inc. | Ballast with filament heating and ignition control |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2110890A (en) * | 1981-12-07 | 1983-06-22 | Krauss Innovatron | Frequency controlled excitation of a gas discharge lamp |
| EP0271396A1 (fr) * | 1986-12-04 | 1988-06-15 | Etablissements Perche | Procédé et dispositif pour l'allumage de lampes à décharge |
| JPH09260080A (ja) * | 1996-03-15 | 1997-10-03 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
| US5757140A (en) * | 1978-03-20 | 1998-05-26 | Nilssen; Ole K. | Electronic ballast with frequency control |
| JPH11185984A (ja) * | 1997-12-25 | 1999-07-09 | Kyocera Corp | 放電灯点灯方式 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363020A (en) * | 1993-02-05 | 1994-11-08 | Systems And Service International, Inc. | Electronic power controller |
| DE19708792A1 (de) * | 1997-03-04 | 1998-09-10 | Tridonic Bauelemente | Verfahren und Vorrichtung zum Erfassen des in einer Gasentladungslampe auftretenden Gleichrichteffekts |
| JP2002544654A (ja) * | 1999-05-06 | 2002-12-24 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 回路装置 |
| WO2000072642A1 (fr) * | 1999-05-25 | 2000-11-30 | Tridonic Bauelemente Gmbh | Ballast electronique destine a au moins une lampe a decharge basse tension |
| DE19923945A1 (de) * | 1999-05-25 | 2000-12-28 | Tridonic Bauelemente | Elektronisches Vorschaltgerät für mindestens eine Niederdruck-Entladungslampe |
| DE10102837A1 (de) | 2001-01-22 | 2002-07-25 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Betriebsgerät für Gasentladungslampen mit Abschaltung der Wendelheizung |
-
2002
- 2002-01-02 DE DE10200053A patent/DE10200053A1/de not_active Withdrawn
- 2002-12-04 EP EP02027136A patent/EP1326486B1/fr not_active Expired - Lifetime
- 2002-12-04 AT AT02027136T patent/ATE308226T1/de active
- 2002-12-04 DE DE50204674T patent/DE50204674D1/de not_active Expired - Lifetime
- 2002-12-20 US US10/323,747 patent/US6753659B2/en not_active Expired - Lifetime
- 2002-12-30 CA CA002415512A patent/CA2415512A1/fr not_active Abandoned
-
2003
- 2003-01-02 CN CNB031009026A patent/CN100527913C/zh not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757140A (en) * | 1978-03-20 | 1998-05-26 | Nilssen; Ole K. | Electronic ballast with frequency control |
| GB2110890A (en) * | 1981-12-07 | 1983-06-22 | Krauss Innovatron | Frequency controlled excitation of a gas discharge lamp |
| EP0271396A1 (fr) * | 1986-12-04 | 1988-06-15 | Etablissements Perche | Procédé et dispositif pour l'allumage de lampes à décharge |
| JPH09260080A (ja) * | 1996-03-15 | 1997-10-03 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
| JPH11185984A (ja) * | 1997-12-25 | 1999-07-09 | Kyocera Corp | 放電灯点灯方式 |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) * |
| PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015600A1 (fr) * | 2006-07-31 | 2008-02-07 | Koninklijke Philips Electronics N.V. | Procédé et circuit de chauffage d'une électrode de lampe à décharge |
Also Published As
| Publication number | Publication date |
|---|---|
| US6753659B2 (en) | 2004-06-22 |
| CA2415512A1 (fr) | 2003-07-02 |
| DE50204674D1 (de) | 2005-12-01 |
| CN100527913C (zh) | 2009-08-12 |
| US20030122499A1 (en) | 2003-07-03 |
| DE10200053A1 (de) | 2003-07-17 |
| CN1430459A (zh) | 2003-07-16 |
| ATE308226T1 (de) | 2005-11-15 |
| EP1326486B1 (fr) | 2005-10-26 |
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