WO2011147464A1 - Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression - Google Patents

Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression Download PDF

Info

Publication number
WO2011147464A1
WO2011147464A1 PCT/EP2010/057439 EP2010057439W WO2011147464A1 WO 2011147464 A1 WO2011147464 A1 WO 2011147464A1 EP 2010057439 W EP2010057439 W EP 2010057439W WO 2011147464 A1 WO2011147464 A1 WO 2011147464A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure discharge
power
discharge lamp
time
electrode
Prior art date
Application number
PCT/EP2010/057439
Other languages
German (de)
English (en)
Inventor
Norbert Magg
Josef KRÖLL
Jürgen Müller
Original Assignee
Osram Gesellschaft mit beschränkter Haftung
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osram Gesellschaft mit beschränkter Haftung filed Critical Osram Gesellschaft mit beschränkter Haftung
Priority to PCT/EP2010/057439 priority Critical patent/WO2011147464A1/fr
Priority to TW100118449A priority patent/TW201215240A/zh
Publication of WO2011147464A1 publication Critical patent/WO2011147464A1/fr

Links

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
    • 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
    • H05B41/2885—Static converters especially adapted therefor; Control thereof
    • H05B41/2887—Static converters especially adapted therefor; Control thereof characterised by a controllable bridge in the final stage
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to a method for compensating the burn-back of electrode tips in high-pressure discharge ⁇ lamps.
  • the invention also relates to an electronic operating device for operating a high-pressure discharge lamp, which carries out this method.
  • the invention is based on a method for compensating the burn-back of electrode tips in Hochdruckentla- dungs lamps according to the preamble of the main claim.
  • Electrode tips known which imposes a current pulse on the rectangular operating current and thus accomplishes a shaping of the electrodes.
  • the current pulse causes primarily a growth of a tip on the electrode, which can reduce the rewarming of the electrode due to the progressing Brenndau ⁇ er or even completely compensate.
  • the problem with respect to the method is achieved by a method for compensating the burn-back of electrode tips in the case of high-pressure discharge wherein the power supplied to the high pressure discharge lamp is modulated at a predetermined frequency between a lower power and an upper power for a predetermined period of time.
  • This modulation causes a favorable growth of the electrode tip by the effect that tungsten is transported toward the electrode tip and electrode burn-back compen ⁇ Siert.
  • the predetermined period of time is between 30s and 10min. This is the optimal time to compensate for the backburn of the electrodes.
  • the predetermined frequency is preferably between 0.2Hz and 10Hz. At this modulation frequency, the desired effect of the method according to the invention is greatest. Particularly preferably, the predetermined frequency is between 0.5 Hz and 5 Hz. This ensures maximum efficiency of the method according to the invention.
  • the modulation frequency can be changed cyclically between a lower frequency value and an upper frequency value.
  • the process can be better adapted to dynamic changes of the electrodes.
  • the duty cycle between the upper and the lower power can be changed, in particular between 20:80 and 80:20. With this measure, the inventive method can be better adapted to different electrode shapes and electrode materials.
  • the lower power is preferably between 10% and 60% of the rated power of the high-pressure discharge lamp, and the upper power is preferably between 90% and 120% of the rated power of the high-pressure discharge lamp.
  • the effect of the method of the invention is greatest.
  • the upper power is increased from 90% to 120% of the rated power in several Steps reduced to 25% to 40% of rated power. This procedure is preferably employed when the projector is turned off and the Hochlichentla ⁇ shuts down discharge lamp slowly to ensure a quick re-ignition.
  • the electronic operating device advises the high-pressure discharge lamp after a switch-off command for a predetermined period of time. In doing so, it reduces the upper power during the predetermined time period from 90% to 120% of the rated power in several
  • Steps up to 25% to 40% of rated power The predetermined period of time is preferably between 30 seconds and 10 minutes. With this procedure, the high-pressure discharge lamp can be operated virtually on "standby", without resulting in a visible restriction for the user, since their light is not needed in these periods.
  • FIG. 1 shows a method according to the invention for compensating the burn-back of electrode tips in high-pressure discharge lamps, which is carried out in a first embodiment during the operation of the high-pressure discharge lamp
  • Fig. 2 shows a second embodiment of the invention
  • FIG. 3 shows a known method for reducing the time until a high-pressure discharge lamp is switched back on in a video projection apparatus
  • Fig. 4 shows a third embodiment of the invention
  • a method for compensating the burn-back of electrode tips in high-intensity discharge lamps which is performed when the high-pressure discharge lamp is switched off, the method being combined with the method for reducing the time until a high-pressure discharge lamp is switched on again in a video projection apparatus,
  • Fig. 1 shows a method of the invention for Kompensati ⁇ on the back fire of electrode tips discharge lamps at Hochdruckent-, which is performed in a first embodiment, during the operation of the high pressure discharge lamp.
  • the high-pressure discharge lamp power P L having a predetermined frequency between a low power P 0 and a obe- ren power P 0 for a predetermined time period from time ti to time t 2 sufficient modulated.
  • the lower power is about 20% of the nominal power ⁇ , and the upper power corresponds approximately to the Nomi ⁇ nal dictionary the high pressure discharge lamp.
  • a high-pressure discharge lamp is operated at its nominal power, the thermal budget of the lamp is balanced such that tungsten is liquefied at the electrode tip while the electrode itself remains in a fixed state. In this case, very little material is melted ⁇ can so that a homogeneous rounding of the tip results about the surface tension at which a discharge arc reliable and clean start. If too much power is coupled into the lamp, more material liquefies at the tip of the electrode and leads to electrode burn-back, if too little power is coupled into the lamp, the electrode tip is not liquid and therefore too cold, and the lamp tends to flicker when commutating.
  • the modulation of the burner power causes a periodic temperature increase and thus a time-varying temperature gradient across the entire electrode head.
  • Another occurring effect in the application of the method according to the invention is a tip growth on ⁇ due to the current modulation. This leads to a periodical ⁇ rule melting and cooling of the electrode tips.
  • the method according to the invention can be carried out in the first embodiment during normal operation as shown in FIG. 1 or in a second embodiment shortly before switching off the high-pressure discharge lamp as shown in FIG. If the off switch is actuated in video projectors at the time to, so the method of the invention is carried out before the actual turning off of the high pressure discharge lamp, and only after the predetermined period of time from the time point ti to the time t 2 is sufficient, the high-pressure discharge lamp is actually turned off.
  • This has the advantage that the quality of the presentation of the video projector is not affected during operation, because after pressing the power button, the image is hidden.
  • a major problem with high-pressure discharge lamps is the fact that the starting voltage for starting the high-pressure discharge lamp rises sharply with the temperature of the high-pressure discharge lamp, so that the high-pressure discharge lamps in video projectors can only be started if they are relatively cold.
  • the so-called 'instant-on' method is known from the prior art, which is shown in FIG.
  • the high pressure discharge lamp is switched off immediately, but the attached to the high pressure discharge lamp ⁇ put power is reduced in several steps before the high pressure discharge lamp is really off.
  • This has the advantage that the high-pressure discharge lamp remains in operation for a certain time after pressing the switch-off button, so that when the switch-off button is pressed inadvertently and shortly thereafter the attempt to put the projector back into operation the high-pressure discharge lamp returns to rated power can be brought and the projector is almost immediately operational again.
  • the method according to the invention for compensating the burn-back of electrode tips in high-pressure discharge lamps can advantageously be linked to the instant-on method.
  • This method is shown in FIG. 4. there is performed erfindungsge ⁇ Permitted method after pressing the Abschaltknopfes, and the high pressure discharge lamp power between an upper value P 0 and a lower value P 0 modulated, in which case discharge lamp power value of the upper high-pressure P 0 is gradually reduced.
  • the modulation of the high-pressure discharge lamp power is again carried out for a predetermined period of time, which extends from the time ti to the time t 2 .
  • the method according to the invention is not equally effective for all modulation frequencies.
  • Fig. 5 shows the high pressure discharge lamp voltage U L over time for a modulation frequency of 0.04Hz. Up to a burning time of 150 h, the average high-pressure discharge lamp voltage drops and then rises again. The high pressure discharge lamp voltage does not remain constant and also has a large variation of over 10V. In addition, the risk of bursting of a high-pressure discharge lamp burner is increased with this slow modulation.
  • FIG. 6 shows the high-pressure discharge lamp voltage U L over the burning time for the method according to the invention with a modulation frequency of 0.2 Hz.
  • the fluctuation range of the high-pressure discharge lamp voltage is lower than in the case of a modulation at 0.04 Hz, but here too it is still about 8 volts. Up to a burning time of about 120h, the high pressure discharge lamp voltage drops, then it remains relatively constant.
  • FIG. 7 shows the high-pressure discharge lamp voltage U L over the burning time for the method according to the invention with a modulation frequency of 1 Hz.
  • the burning voltage drops significantly, which shows a very strong transport of tungsten material to the electrode tip.
  • burn-back and material transport are in equilibrium and the burning voltage remains very constant at low burning voltages with a very small fluctuation range of only 2-3 volts.
  • the high-pressure discharge lamp voltage U L over the burning time for the method according to the invention with a modulation frequency of 5 Hz.
  • the high-pressure discharge lamp voltage again becomes slightly unstable, even though the fluctuation range of the high-pressure discharge lamp voltage U L with approximately 5V is still quite low.
  • the high-pressure discharge lamp voltage decreases slightly over the entire burning time, although it remains stable several times over a short burning period of about 50 hours. Overall, however, the high-pressure discharge lamp voltage is subject to greater fluctuations and can no longer be described as stable.
  • FIG. 9 shows the high-pressure discharge lamp voltage U L over the burning time for the method according to the invention with a modulation frequency of 25 Hz. At this modulation frequency no stabilization of the high-pressure discharge lamp voltage can be observed.
  • the fluctuation range of the high-pressure discharge lamp voltage here is about 6-7V, it is therefore assumed that the stabilizing effect at a modulation of 25 Hz is not or only slightly comes into play.
  • the optimal modulation frequency of the burner power in order to realize a maximum material transport to the electrode tip, thus compensating electrode burn in a mög ⁇ lichst short time is directly related to Elect ⁇ rodenform- and construction.
  • the heat ⁇ conductivity and capacity depends on the used wire diameters in the wound electrode also on the
  • the modulation frequency can not be fixedly selected but changed between a lower and an upper frequency value.
  • the change can be cyclic e.g. take place in the form of a triangular or sawtooth frequency change.
  • the variation can also take place randomly, and only a desired frequency frequency of the modulation frequencies can be set.
  • an optimal effectiveness of the erfindungsge ⁇ MAESSEN method is achieved when the temperature deviation at the electrode at a given modulation frequency is maximum. Since the heating and cooling rates can be quite different depending on the type of burner, it may be advantageous, for example, the cooling phase to choose shorter than the on ⁇ heating phase.
  • the duty ratio between the top power P 0 and lower power P 0 can thus be varied, and need not be as shown in Figures 1 to 4 is indicated at 50% lie ⁇ gen preferably, the duty ratio between the upper and the lower power is between 20..: 80 and 80:20.
  • the dynamics of the periodic expansion and contraction of the electrode can be specifically influenced.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression, au moyen duquel la puissance fournie à la lampe à décharge à haute pression est modulée pendant une durée déterminée avec une fréquence déterminée entre une puissance inférieure et une puissance supérieure. L'invention concerne également un appareil de commande électronique servant à commander une lampe à décharge à haute pression qui exécute ce procédé.
PCT/EP2010/057439 2010-05-28 2010-05-28 Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression WO2011147464A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2010/057439 WO2011147464A1 (fr) 2010-05-28 2010-05-28 Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression
TW100118449A TW201215240A (en) 2010-05-28 2011-05-26 Method for backfire compensation of electrode tip for HID lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/057439 WO2011147464A1 (fr) 2010-05-28 2010-05-28 Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression

Publications (1)

Publication Number Publication Date
WO2011147464A1 true WO2011147464A1 (fr) 2011-12-01

Family

ID=43735076

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/057439 WO2011147464A1 (fr) 2010-05-28 2010-05-28 Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression

Country Status (2)

Country Link
TW (1) TW201215240A (fr)
WO (1) WO2011147464A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013131802A1 (fr) 2012-03-06 2013-09-12 Osram Gmbh Circuit et procédé permettant de faire fonctionner au moins une lampe à décharge
WO2013155265A1 (fr) * 2012-04-13 2013-10-17 Intel Corporation Plans de récupération de connexion d2d
CN110213844A (zh) * 2019-06-28 2019-09-06 厦门艾美森新材料科技股份有限公司 一种气垫机及其加热丝加热功率的自动补偿方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020011803A1 (en) * 2000-05-03 2002-01-31 Koninlijke Philips Electronics N.V. Method of and device for operating a gas discharge lamp
WO2007110800A1 (fr) * 2006-03-28 2007-10-04 Philips Intellectual Property & Standards Gmbh Fonctionnement d'une lampe à décharge
US20090009095A1 (en) * 2004-08-06 2009-01-08 Koninklijke Philips Electronics, N.V. Method and Circuit Arrangement for Operating a Discharge Lamp
EP2152048A2 (fr) * 2008-08-07 2010-02-10 Seiko Epson Corporation Dispositif de commande et procédé de commande d'une lampe à décharge électrique, dispositif de source lumineuse, et appareil d'affichage d'image

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020011803A1 (en) * 2000-05-03 2002-01-31 Koninlijke Philips Electronics N.V. Method of and device for operating a gas discharge lamp
US20090009095A1 (en) * 2004-08-06 2009-01-08 Koninklijke Philips Electronics, N.V. Method and Circuit Arrangement for Operating a Discharge Lamp
WO2007110800A1 (fr) * 2006-03-28 2007-10-04 Philips Intellectual Property & Standards Gmbh Fonctionnement d'une lampe à décharge
EP2152048A2 (fr) * 2008-08-07 2010-02-10 Seiko Epson Corporation Dispositif de commande et procédé de commande d'une lampe à décharge électrique, dispositif de source lumineuse, et appareil d'affichage d'image

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013131802A1 (fr) 2012-03-06 2013-09-12 Osram Gmbh Circuit et procédé permettant de faire fonctionner au moins une lampe à décharge
US9253861B2 (en) 2012-03-06 2016-02-02 Osram Gmbh Circuit arrangement and method for operating at least one discharge lamp
WO2013155265A1 (fr) * 2012-04-13 2013-10-17 Intel Corporation Plans de récupération de connexion d2d
CN110213844A (zh) * 2019-06-28 2019-09-06 厦门艾美森新材料科技股份有限公司 一种气垫机及其加热丝加热功率的自动补偿方法

Also Published As

Publication number Publication date
TW201215240A (en) 2012-04-01

Similar Documents

Publication Publication Date Title
DE60216402T2 (de) Betrieb einer Hochdruckgasentladungslampe mit niedrigerer Frequenz
DE60129265T2 (de) Quecksilberhochdrucklampen-Leuchtvorrichtung und Mittel zu ihrer Zündung
DE102004041925A1 (de) Vorschaltgerät für eine Hochdruckentladungslampe
EP0834905A2 (fr) Lampe haute pression au sodium de faible puissance
DE10062974A1 (de) Hochdruckgasentladungslampe und Verfahren zu ihrer Herstellung
EP1938669B1 (fr) Procede d'utilisation d'une lampe a decharge gazeuse
DE102004025614A1 (de) Vorschaltgerät und Verfahren für eine Hochdruckentladungslampe
DE60223313T2 (de) Lichtquellenvorrichtung
WO2011147464A1 (fr) Procédé de compensation du temps de retard d'arc de pointes d'électrodes dans les lampes à décharge à haute pression
DE4301276A1 (de) Verfahren und Stromversorgungseinheit zum stabilisierten Betrieb einer Natrium-Hochdruckentladungslampe
EP2090143A1 (fr) Installation de circuit pour la commande de lampes à décharge et procédé de commande de lampes à décharge
DE102011089592B4 (de) DLP-Projektor mit Stromüberhöhung, Frequenzmodulation und Stromhöhenmodulation für eine Entladungslampe und entsprechendes Verfahren
DE602004012450T2 (de) Verfahren und schaltungsanordnung zum betrieb einer entladungslampe
DE102006033672A1 (de) Beleuchtungssystem mit einer Entladungslampe und einem elektronischen Vorschaltgerät und Verfahren zum Betreiben eines Beleuchtungssystems
WO2010115773A1 (fr) Circuiterie et procédé de fonctionnement d'une lampe à décharge à haute pression
EP2604098A1 (fr) Procédé de fonctionnement d'une lampe à décharge haute pression au-delà de sa plage de puissance nominale
DE69810053T2 (de) Gerät zum Betreiben einer Entladungslampe
EP1476003B1 (fr) Circuit d'alimentation et méthode pour l'alimentation de lampes à décharge gazeuse
DE102004004829A1 (de) Betriebsverfahren, elektronisches Vorschaltgerät und System für den Resonanzbetrieb von Hochdrucklampen im longitudinalen Mode
DE60308149T2 (de) Einrichtung und verfahren zur steuerung einer gasentladungslampe und beleuchtungssystem mit gasentladungslampe und steuereinrichtung
DE102004020397A1 (de) Verfahren zum Betreiben einer Hochdruckentladungslampe
DE961123C (de) Elektrische Hochdruckentladungslampe
DE102015219760B4 (de) Projektionsvorrichtung zum Projizieren mindestens eines Bildes auf eine Projektionsfläche und Verfahren dazu
WO2012034931A1 (fr) Procédé de fonctionnement d'une lampe à décharge de gaz d'un phare de véhicule automobile
DE602004012135T2 (de) Beleuchtungseinrichtung und verfahren zu ihrem betrieb

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10726928

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10726928

Country of ref document: EP

Kind code of ref document: A1