EP0744883B1 - Verfahren bzw. Vorrichtung zum Betrieb einer Hochdruckentladungslampe - Google Patents
Verfahren bzw. Vorrichtung zum Betrieb einer Hochdruckentladungslampe Download PDFInfo
- Publication number
- EP0744883B1 EP0744883B1 EP95107865A EP95107865A EP0744883B1 EP 0744883 B1 EP0744883 B1 EP 0744883B1 EP 95107865 A EP95107865 A EP 95107865A EP 95107865 A EP95107865 A EP 95107865A EP 0744883 B1 EP0744883 B1 EP 0744883B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- lamp
- modulation
- discharge lamp
- pressure discharge
- 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
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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
- H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2928—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
Definitions
- the invention relates to a method and a Device for operating a high-pressure discharge lamp, in particular a high pressure mercury lamp, one High pressure metal lamp or one High pressure sodium lamp, in which the from a DC power derived from a voltage source Inverter is supplied, in particular via a Current limiting choke the high pressure discharge lamp fed.
- the choice of Operating frequency for ballasts from High pressure discharge lamps are of considerable importance since Lamps of this type are caused by resonance effects longitudinal resonances within the tubular Lamp body occur.
- the resonance frequencies depend not only on the type of gas used and the average gas temperature, but also from the Burner geometry. Therefore the resonance spectra are for High-pressure discharge lamps of different types different. But there can also be changes in resonance come within a series of lamps of the same type.
- the Operating frequency of the inverter in one Area to be relocated in which there are no resonances occur This has the disadvantage that for a certain Lamp only one specially matched to this Ballast can be used. Changes namely the operating frequency from the allowable Frequency window out, it comes because of the Symptoms of instability.
- the output frequency of the inverter to modulate the stroke of the modulation frequency is not greater than the permissible frequency window, so neighboring resonance frequencies are not excited.
- the object of the invention is a method or an apparatus of the beginning mentioned type to further develop that one also high-pressure discharge lamps with higher Performance, e.g. in the range of 70 - 2000 watts and secondly the ones described above Disadvantages due to the resonance effects can be avoided.
- EP 0 386 990 A2 discloses a method and a circuit for discharge lamps according to the preamble of claims 1 and 2.
- the circuit generates a frequency modulated High-frequency voltage for driving a xenon metal halide lamp.
- the carrier frequency of this voltage is in a range from 10 kHz to 200 kHz.
- the circuit is directly connected to a DC voltage source. It includes a two-stage power converter with one DC converter input stage and a DC to AC converter output stage. The entry level is regulated while the output stage is unregulated. Lamp voltage and current are in the Input stage fed back to regulate the lamp power.
- the output stage is frequency modulated.
- the current flowing through the lamp becomes currently limited by a linear loading inductor, while the average power through a controlled DC link voltage is regulated. It recommends the circuit at a modulation to carrier frequency ratio which satisfies the condition 0.01 ⁇ f / CF> 0.05 fulfilled to operate the lamp power to control.
- the carrier frequency is in the range of 20 kHz - 80 kHz.
- EP 0 439 861 A1 relates to a circuit for operating a Low-pressure mercury discharge lamp using high-frequency pulsed Electricity.
- the circuit has a modulator II for modulating the Current with a modulation frequency f.
- the input of the modulator II is by a current that is provided by a current source I fed.
- the circuit also has a circuit arrangement VI, whose output for setting the modulation frequency f with an input of Modulator II is connected.
- Modulation frequency f either O or it is in the range of a few kHz.
- DE 42 34 358 A1 describes a method and a device for operating a gas discharge lamp known. To stabilize the operation of the lamp and to avoid resonance vibrations inside the lamp, it is proposed the frequency of the operating current for the lamp with to modulate a frequency swing of 3%.
- the object is achieved in that the power made available to the high pressure discharge lamp either by varying the voltage at the input of the inverter or by Modulating the inductance modulated in the output circuit of the inverter becomes.
- the invention is characterized in that the Output power of the ballast, which to the High-pressure discharge lamp is emitted, so modulated is that a resonance rocking fundamentally is avoided.
- the inverter frequency within a previously specified frequency band, but the Output power, the average of which is the nominal value equivalent.
- "pumped" output power so through the constantly varying instantaneous power none at one Rocking leading energy absorption to the Resonance points can take place.
- the modulation frequency can be varied in a wide range, the lower limit is determined only by a for the flicker of the lamp visible to the eye is avoided must become.
- the modulation frequency is upwards only by the operating frequency of the inverter limited, which is between 10 kHz and 100 kHz.
- the solution according to the invention can be the ballast now use universally, regardless of the type of Lamp and without exposing yourself to the risk that as with State of the art with insufficient adaptation of Ballast on the one hand and discharge lamp on the other hand, instabilities can occur.
- a conventional Ballast not only replace, but points out the advantage that the lighting comfort is increased, since there is no flickering.
- it follows a longer service life associated with the high pressure lamp lower replacement labor costs of the illuminant.
- the Device according to the invention over a lower weight and can optionally with DC voltage (e.g. Battery systems, solar systems) or via a Rectifier supplied with AC mains voltage become. Beyond that there are none Compensation capacitors like conventional ones Ballasts required.
- the output power can be modulated be that the inverter at its control input is controlled with a variable frequency.
- the lamp current at higher frequencies due to the constant inverter supply voltage and the constant inductance periodically according to the Frequency deviation varies.
- the output power modulated in that the inductance by a voltage variable inductance in the form of a transducer is replaced so that at constant operating frequency and constant supply voltage of the inverter the corresponding due to the variable inductance Modulation is effected.
- a third variant provides that with constant inductance and constant Operating frequency of the inverter Supply voltage at the input of the inverter is varied.
- the output power is preferably modulated such that the stroke of the delivered to the high pressure lamp Output power between zero and double Rated power, based on a fast ratio of 1: 1 lies.
- Duty cycle variable being too large Duty cycles (e.g.> 10: 1) the light quality Flickering suffers.
- the first embodiment shown in FIG Invention shows one to be supplied High-pressure discharge lamp 1, which is a common one High pressure mercury lamp, one High pressure metal lamp or a High pressure sodium lamp can be.
- the operating frequency of the inverter is typically between 10 and 100 kHz.
- the operating frequency of the inverter 3 is now modulated via the frequency adjustment device 9 in such a way that the time profile of the lamp current I L fed into the high-pressure discharge lamp is shown in FIG. 4c.
- the frequency swing of the frequency adjustment device 9 is adapted in this example so that the output power P varies by the nominal value (100%) fluctuating between the value 0 and 200%. On average, the power delivered to the lamp corresponds to the nominal power.
- the frequency adjustment device 9 consists of a voltage-frequency converter 9a, a control amplifier 9b and a modulation amplifier 9c.
- FIG. 4a shows the solution used in the prior art, which consists in applying a constant power to the high-pressure discharge lamp by generating a lamp current I L , which changes over time in a sinusoidal manner, by the inverter.
- the frequency of the lamp current I L is adapted in accordance with the previously determined resonance conditions of the respective high-pressure discharge lamp.
- the solution according to the invention by constant change the instantaneous value of the output power on the one hand and due to the constantly changing current output frequency of the inverter a rocking on the Prevents resonance points.
- Fig. 2 shows a variant of that shown in Fig. 1 Embodiment, which differs in that the inverter now has a constant Operating frequency is operated and instead the in Output circuit of the inverter lying inductance 7a, which is designed as a transducer, is modulated.
- the modulation is carried out using a Inductance adjustment device 7, the one in time outputs variable output voltage, and from one Control amplifier 7b and a modulation generator 7c consists.
- the time course of the occurring Lamp current IL is shown in Fig. 4d.
- the one defined by the envelope of the lamp current corresponds over time to the output power the one as shown in Fig. 4b.
- FIG. 3 illustrated embodiment of the invention that the Voltage present at the input of the inverter 3 by means of a voltage adjustment device 6 is varied that that shown in Fig. 4e time course of the lamp current IL results.
- the Voltage adjustment device 6 consists of a Modulation generator 6c, a control amplifier 6b and a voltage converter 6a.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
- Fig.1
- ein Blockschaltbild eines ersten Ausführungsbeispiels der Erfindung
- Fig. 2
- ein Blockschaltbild eines zweiten Ausführungsbeispiels der Erfindung
- Fig. 3
- ein Blockschaltbild eines dritten Ausführungsbeispiels der Erfindung
- Fig. 4
- zeitliche Verläufe der Ausgangsleistung bzw. des Lampenstromes IL zur Erläuterung der erfindungsgemäßen Lösung, wobei
- Fig. 4a
- den zeitlichen Verlauf von Leistung P und Lampenstrom IL beim Stand der Technik,
- Fig. 4b
- den zeitlichen Verlauf der Ausgangsleistung P gemäß der Erfindung,
- Fig. 4c
- den zeitlichen Verlauf des Lampenstromes gemäß dem ersten Ausführungsbeispiel der Erfindung,
- Fig. 4d
- den zeitlichen Verlauf des Lampenstromes gemäß dem zweiten Ausführungsbeispiel der Erfindung und
- Fig. 4e
- den zeitlichen Verlauf des Lampenstromes gemäß dem dritten Ausführungsbeispiel der Erfindung.
Claims (5)
- Verfahren zum Betrieb einer Hochdruckentladungslampe (1), insbesondere einer Quecksilberdampfhochdrucklampe, einer Metalldampfhochdrucklampe oder einer Natriumdampfhochdrucklampe, bei dem die aus einer Spannungsquelle (10) abgeleitete Gleichspannungsleistung einem Wechselrichter (3) zugeführt wird, der insbesondere über eine Strombegrenzungsdrossel (8) die Hochdruckentladungslampe speist,
wobei der mit einer Betriebsfrequenz im Bereich von 10 kHz bis 100 kHz arbeitende Wechselrichter (3) eine periodisch um einen Nennleistungswert modulierte Ausgangsleistung erzeugt,
wobei die Modulationsfrequenz unterhalb der Betriebsfrequenz des Wechselrichters liegt,
dadurch gekennzeichnet, daß
die Modulationsfrequenz oberhalb von 50 Hz liegt, und
das Modulieren der Ausgangsleistung erfolgt entweder durch Variieren der Spannung am Eingang des Wechselrichters (Fig.1; Fig.3) oder
durch Modulieren der Induktivität im Ausgangskreis des Wechselrichters (Fig.2). - Vorrichtung zur Speisung einer Hochdruckentladungslampe, insbesondere einer Quecksilberdampfhochdrucklampe, einer Metalldampfhochdrucklampe oder einer Natriumdampfhochdrucklampe, mit einem von aus einer Spannungsquelle (10) abgeleiteten Gleichspannung beaufschlagten Wechselrichter (3), der über einen Induktivitätskreis (8) zur Strombegrenzung die Hochdruckentladungslampe (1) speist,
wobei dem mit einer Betriebsfrequenz von 10 kHz bis 100 kHz arbeitenden elektronischen Wechselrichter (3) ein Modulationsmittel (5-9) zugeordnet ist, zur Modulation seiner an die Hochdruckentladungslampe (1) abgegebenen Ausgangsleistung mit einer Modulationsfrequenz unterhalb der Betriebsfrequenz,
dadurch gekennzeichnet, daß
die Modulationsfrequenz oberhalb von 50 Hz liegt und
das Modulationsmittel als eine auf den Leistungseingang des Wechselrichters wirkende Spannungsvariationsstufe (6) oder
als eine auf den einen Transduktor (7a) enthaltenden Induktivitätskreis wirkende Induktivitätsvariationsstufe (7) ausbgebildet ist. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß
als Modulationsmittel eine auf den Steuereingang des Wechselrichters wirkende Frequenzverstelleinrichtung (9) vorgesehen ist (Fig. 1). - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß
zur Dimmung der Lampe (1) weitere Mittel zur Variation des Nennwertes der an die Hochdruckentladungslampe gegebenen Ausgangsleistung unter Beibehaltung der Modulationsbedingungen vorgesehen sind. - Vorrichtung nach einem der Ansprüche 2 oder 3,
dadurch gekennzeichnet, daß
der Hub der an die Hochdruckentladungslampe (1) abgegebenen Ausgangsleistung zwischen dem Wert 0 und der doppelten Nennleistung, bezogen auf ein Tastverhältnis von 1:1 liegt.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59510867T DE59510867D1 (de) | 1995-05-23 | 1995-05-23 | Verfahren bzw. Vorrichtung zum Betrieb einer Hochdruckentladungslampe |
AT95107865T ATE261235T1 (de) | 1995-05-23 | 1995-05-23 | Verfahren bzw. vorrichtung zum betrieb einer hochdruckentladungslampe |
EP95107865A EP0744883B1 (de) | 1995-05-23 | 1995-05-23 | Verfahren bzw. Vorrichtung zum Betrieb einer Hochdruckentladungslampe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95107865A EP0744883B1 (de) | 1995-05-23 | 1995-05-23 | Verfahren bzw. Vorrichtung zum Betrieb einer Hochdruckentladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0744883A1 EP0744883A1 (de) | 1996-11-27 |
EP0744883B1 true EP0744883B1 (de) | 2004-03-03 |
Family
ID=8219281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95107865A Expired - Lifetime EP0744883B1 (de) | 1995-05-23 | 1995-05-23 | Verfahren bzw. Vorrichtung zum Betrieb einer Hochdruckentladungslampe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0744883B1 (de) |
AT (1) | ATE261235T1 (de) |
DE (1) | DE59510867D1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5684367A (en) * | 1996-01-16 | 1997-11-04 | Osram Sylvania Inc. | Color control and arc stabilization for high-intensity, discharge lamps |
US6005356A (en) * | 1996-10-21 | 1999-12-21 | Matsushita Electric Industrial Co., Ltd. | Operating method and operating apparatus for a high pressure discharge lamp |
ES2191926T3 (es) | 1997-02-08 | 2003-09-16 | Bosch Gmbh Robert | Procedimiento para la determinacion de la frecuencia de resonancia de un circuito electrico oscilante. |
DE69735257T2 (de) * | 1997-07-24 | 2006-11-16 | F. Verdeyen N.V. | Wechselrichter zur Versorgung einer Entladungslampe mit sprunghaft veränderlicher Frequenz |
US6124683A (en) * | 1999-04-14 | 2000-09-26 | Osram Sylvania Inc. | System for and method of operating a mercury free discharge lamp |
US6229269B1 (en) | 1999-05-21 | 2001-05-08 | Osram Sylvania Inc. | System for and method of operating a discharge lamp |
FR2799062B1 (fr) * | 1999-09-27 | 2001-12-21 | Valeo Vision | Perfectionnements a la commande de l'alimentation de lampes a decharge notamment de projecteur de vehicule automobile |
US6498441B1 (en) * | 2001-08-10 | 2002-12-24 | Koninklijke Philips Electronics N.V. | Method for coloring mixing of hid lamps operated at VHF frequencies using duty cycle modulation |
US6870324B2 (en) * | 2001-08-15 | 2005-03-22 | Koninklijke Philips Electronics N.V. | Method for color mixing with arc stability and straightening of HID lamps operated at high frequencies using duty cycle modulation |
WO2005098902A2 (en) * | 2004-04-09 | 2005-10-20 | Koninklijke Philips Electronics N.V. | High-pressure sodium lamp |
DE102005059762A1 (de) * | 2005-12-14 | 2007-06-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Schaltungsanordnung und Verfahren zum Betreiben von Hochdruck-Gasentladungslampen |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU632094B2 (en) * | 1989-03-08 | 1992-12-17 | General Electric Company | Acoustic resonance operation for xenon-metal halide lamps |
EP0439861A1 (de) * | 1990-01-29 | 1991-08-07 | Koninklijke Philips Electronics N.V. | Schaltanordnung |
DE4234358A1 (de) * | 1992-10-12 | 1993-02-25 | Juerg Nigg | Verfahren zum betrieb einer gasentladungs- oder fluoreszenzlampe und vorschaltgeraet hierfuer sowie verwendungen hierfuer |
US5382881A (en) * | 1992-12-28 | 1995-01-17 | North American Philips Corporation | Ballast stabilization circuitry for eliminating moding or oscillation of the current envelope in gas discharge lamps and method of operating |
-
1995
- 1995-05-23 AT AT95107865T patent/ATE261235T1/de not_active IP Right Cessation
- 1995-05-23 EP EP95107865A patent/EP0744883B1/de not_active Expired - Lifetime
- 1995-05-23 DE DE59510867T patent/DE59510867D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
Sturm, C.H.; Klein, E.; "Betriebsgeräte und Schaltungen für elektrische Lampen - Vorschaltgeräte, Starter, Lampen und Leuchten, Normen", Siemens Aktiengesellschaft, Berlin und München, ISBN 3-8009-1586-3, 6. Auflage, 1992, Seiten 206-226 * |
Also Published As
Publication number | Publication date |
---|---|
EP0744883A1 (de) | 1996-11-27 |
ATE261235T1 (de) | 2004-03-15 |
DE59510867D1 (de) | 2004-04-08 |
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