EP2526742A1 - Agencement de circuit et procédé de fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale - Google Patents

Agencement de circuit et procédé de fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale

Info

Publication number
EP2526742A1
EP2526742A1 EP11779370A EP11779370A EP2526742A1 EP 2526742 A1 EP2526742 A1 EP 2526742A1 EP 11779370 A EP11779370 A EP 11779370A EP 11779370 A EP11779370 A EP 11779370A EP 2526742 A1 EP2526742 A1 EP 2526742A1
Authority
EP
European Patent Office
Prior art keywords
current
lamp
nominal power
periods
magnitude
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
Application number
EP11779370A
Other languages
German (de)
English (en)
Other versions
EP2526742B1 (fr
Inventor
Joachim MÜHLSCHLEGEL
Andreas Kloss
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 GmbH filed Critical Osram GmbH
Publication of EP2526742A1 publication Critical patent/EP2526742A1/fr
Application granted granted Critical
Publication of EP2526742B1 publication Critical patent/EP2526742B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light

Definitions

  • the invention relates to a method for operating a high-pressure discharge lamp below its nominal power with an alternating voltage and an alternating current of a predetermined operating frequency.
  • the invention is based on a method for operating a high-pressure discharge lamp below its nominal power with an alternating current of a predetermined operating frequency according to the preamble of the main claim.
  • high-pressure discharge lamps also referred to below as lamps
  • various problems arise.
  • Virtually all commercially available high-pressure discharge lamps are optimized to their nominal power out so that the plasma physical processes and the thermal budget of the lamp run optimally at the nominal lamp power and have the highest efficiency.
  • nominal power of the high-pressure discharge lamp the consequences ⁇ to the specified by the manufacturer for this lamp power is considered.
  • the high-pressure discharge lamp Due to the optimized plasma-physical processes and the likewise optimized thermal budget of the high-pressure discharge lamp, the high-pressure discharge lamp has a good operating stability during operation with its nominal lamp power or nominal power.
  • dimming high pressure discharge lamps the operating stability suffers sometimes considerably, since the thermal budget of the burner with increasing dimming level must always work further away from its optimum.
  • Most of the marketable high pressure discharge lamps are powered by alternating current. This is usually a rectangular operating current low frequency used, which also, wobbly
  • the arc attachment on the electrodes is basically self ⁇ table during operation of a gas discharge lamp with alternating current.
  • the transition cathode-anode is inherently unproblematic, since the temperature of the electrode has no influence on their anodic operation. In the anode-to-cathode transition, the ability of the electrode to supply a sufficiently high current depends on its temperature.
  • the arc changes during commutation usually after the zero crossing, from a short-term diffuse arc approach mode (so-called, diffuse-mode '), to a punctiform arc approach mode (so-called' spot mode ').
  • This change is sometimes accompanied by an often visible collapse of the light emission, which can be perceived as flickering.
  • the electrodes of the high-pressure discharge lamp are getting colder and the commutation of the operating current can start the lamp to flicker and be in ⁇ stable. These instabilities in the commutation sometimes cause considerable electromagnetic Störun ⁇ conditions.
  • the solution of the object with respect to the method is carried out according to the invention with a method for operating a high-pressure discharge lamp below its nominal Leis ⁇ tion, the high-pressure discharge lamp is operated at Nominalleis ⁇ tion with an alternating current of a predetermined operating frequency, and the lamp voltage during a half period at least at the beginning of a half period and measured at the end of a half period, with the following steps:
  • the gas discharge Lamp burner heated until commutation so far that it can be carried out without problems and without the above-described elekt ⁇ romagnetician interference due to a high-frequency current oscillation shortly after commutation.
  • the amount of the current behaves
  • I en dl at the end of the half periods as II s tart I: I l end I 1: 1.5 .. 1: 3.0. These values ensure a clean commutation even with difficult lamps.
  • the upper limit is 120 Hz. This makes it possible to dimming commercially available lamps safely.
  • the upper limit is 80 Hz.
  • the upper limit is 1 Hz. With this variant, even very difficult to dimming special lamps can be well dimmed.
  • the predetermined operating frequency is usually ⁇ 160Hz.
  • I s dl the panel ⁇ roof-shaped current form of the invention at the end of the half periods is increased in a preferred disclosed embodiment, if a threshold is not worth reaching for the difference between the lamp voltages at the end and the beginning of the half periods.
  • the threshold value for the difference of the lamp voltages is divided into a lower threshold value and an upper threshold value, and the magnitude of the current I end at the end of the half periods is increased when the lower threshold value is undershot, and the magnitude of the current
  • the threshold value for the difference of the lamp voltages becomes a lower one
  • increases at the end of the half periods, and when the upper threshold value is exceeded, the magnitude of the current I Istart I at the beginning of the half periods and the amount of the current
  • the threshold value for the difference between the lamp voltages is preferably between 0.2 volts and 3 volts. Furthermore, the upper threshold value is at most 0.5 volts greater than the lower threshold value.
  • the current form of the alternating current at nominal power is preferably rectangular.
  • the current form of the alternating current at nominal power is preferably pentachelike, the magnitude of the current
  • I en dl at the end of the half-periods behaves as II s tart I: I l end I 1: 1 ⁇ 1: 1.2.
  • the solution of the problem with respect to the circuit arrangement is carried out with a circuit arrangement for operating a High-pressure discharge lamp below its nominal Leis ⁇ tion, wherein the high-pressure discharge lamp is operated at Nominalleis ⁇ tion with an alternating current of a predetermined operating frequency, and the circuit arrangement performs the method described above.
  • the circuit arrangement can be constructed in a conventional manner.
  • the circuit may include a power factor correction circuit which supplies at its output an intermediate voltage circuit to which an inverter in the form of a full or half bridge is connected.
  • the circuitry may include a Resonanzzünd réelle, to ignite the high-pressure discharge lamp or a pulse.
  • the circuitry may include analog or digital control circuitry that controls the power factor correction circuit and the inverter.
  • the circuit arrangement preferably has a digital control circuit with a microcontroller.
  • curve 40 the lamp current profile at 100% of the nominal power
  • curve 42 the lamp current profile at 55% of the nominal power with a method of operation according to the prior art
  • curve 44 the lamp current course 55% of the nominal power with the method according to the invention.
  • FIG. 1 shows a lamp voltage curve with a very weak diffuse-spot transition at nominal power (curve power). ve 10) and pronounced diffuse-spot transition 122 in dimming mode (53% of nominal power, curve 12) at a time resolution of 10 s / div.
  • FIG. 2 shows the lamp current profile of the signals of FIG. 1 at a very weak diffuse-spot transition
  • a dome-shaped lamp current according to the invention is proposed for dimmed operation, the magnitude of which I start at the beginning of the half periods to the amount
  • I at the end of the half periods behaves like I start 1: 1.2 to 1: 3.0.
  • the lamp current at the end of the half-period is twice as large as at the beginning of the half-period.
  • the lamp current is variable during the half periods and depends on the change of the lamp voltage during a half period.
  • the height of the lamp current increase during one Half-period, ie the ratio of starting current to final current I Istart I: ll end l depends on the lamp voltage and especially after the change of the lamp voltage, which is applied during the half-period.
  • the change in the lamp current in a half-period is adjusted so that the lamp voltage has increased by a previously calculated or a predetermined value AUi, U2.
  • the threshold value for theistsan ⁇ increase of the lamp voltage in the half-period is depending on the gas discharge lamp between 0.2V and 4V.
  • the threshold is preferably divided into a lower threshold and an upper threshold.
  • the voltage increase is calculated from the difference of the lamp voltage at the end of the half-period to the lamp voltage at the beginning of the half-period. If the threshold value for the lamp voltage increase is not reached within the half-period, the ratio of starting current to final current for the next half-period is reached
  • I Istart I ll end l increased to heat the cathode more and avoid a pronounced diffuse-spot transition during commutation as possible.
  • the ratio of starting current to final current for the next half-cycle II s tart I: I l end I is increased when a lower threshold for the voltage increase of the lamp voltage in the half-period is exceeded, and lowered, if an upper threshold for the voltage increase ⁇ the lamp voltage is exceeded in the half-period. If the rise of the lamp voltage in the range between the lower and upper threshold value, that behaves ⁇ nis of starting current to tail current for the next half cycle I Istart I is: I l I end retained.
  • FIG. 3 shows the lamp current characteristics at 50 Hz
  • curve 30 shows the lamp current profile at 100% of the nominal power
  • curve 32 shows the lamp current profile at 55% of the nominal power with a method of operation according to the prior art
  • curve 34 shows the lamp current profile at 55% of the nominal power with the operating method according to the invention at a time resolution of 10ms / div.
  • the pent roof-shaped current profile can be clearly seen in the curve 34, here the lamp current at the end of the half-period is twice as large as at the beginning of the half-period. However, this would not genü ⁇ gen to ensure stable operation of the high pressure discharge lamp at low dimming levels.
  • the operating frequency supply ⁇ lowers below an upper limit to this Stable operation to reaching.
  • the upper limit is a maximum of 120 Hz, preferably the Be ⁇ operating frequency is lowered to a frequency around 50Hz to 60Hz.
  • Lower frequencies can be problematic because at an operating frequency below 50Hz, the human eye exhibits increased flicker sensitivity on the dimming operation has a negative effect. Only below a hertz decreases the flicker sensitivity of the human eye, so that even very low operating frequencies are possible.
  • the particularly preferred operating frequency of the invention is thus at 50Hz to 60Hz, at very low dimming levels below 1Hz.
  • the increase in the lamp voltage is inventively measured again in a half period and entspre ⁇ accordingly adjusted the ratio of starting current to end current I for the next half cycle of the voltage rise in the current half period.
  • Fig. 4 shows a detail of the commutation of the lamp current waveforms at 50 Hz from FIG. 3 in higher Zeitauflö ⁇ solution
  • curve 40 the lamp current waveform at 100% of Nomi ⁇ nal Vietnamese
  • curve 42 the lamp current waveform by 55% of the nominal power with an operating procedure
  • curve 44 the lamp current profile at 55% of the nominal power with the inventive method.
  • the time resolution is no longer 10ms / div, but only 10 s / div. It shows in particular the commutation tion of the lamp current.
  • curve 44 shows in particular the commutation tion of the lamp current.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale, la lampe à décharge à haute pression étant actionnée à sa puissance nominale par un courant alternatif d'une fréquence de fonctionnement prédéfinie, et la tension de la lampe pendant une demi-période étant mesurée au moins au début d'une demi-période et à la fin d'une demi-période, dont les étapes consistent : - à faire baisser la fréquence de fonctionnement actuelle sous une limite supérieure, - à modifier la forme du courant du courant alternatif en une forme de courant en toit incliné, qui dépend de la différence des tensions de lampe à la fin et au début de la demi-période, dans laquelle la valeur du courant |Istart| au début des demi-périodes par rapport à la valeur du courant |Iend| à la fin des demi-périodes se comporte de sorte que |Istart|:|Iend| = 1:1,2… 1:3,0. L'invention concerne également un agencement de circuit pour le fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale, la lampe à décharge à haute pression étant actionnée à sa puissance nominale par un courant alternatif d'une fréquence de fonctionnement prédéfinie, et l'agencement de circuit réalisant le procédé décrit ci-dessus.
EP11779370.3A 2010-11-09 2011-10-24 Agencement de circuit et procédé de fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale Not-in-force EP2526742B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010043604 2010-11-09
PCT/EP2011/068509 WO2012062556A1 (fr) 2010-11-09 2011-10-24 Agencement de circuit et procédé de fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale

Publications (2)

Publication Number Publication Date
EP2526742A1 true EP2526742A1 (fr) 2012-11-28
EP2526742B1 EP2526742B1 (fr) 2014-06-11

Family

ID=44910192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779370.3A Not-in-force EP2526742B1 (fr) 2010-11-09 2011-10-24 Agencement de circuit et procédé de fonctionnement d'une lampe à décharge à haute pression sous sa puissance nominale

Country Status (4)

Country Link
US (1) US20130229128A1 (fr)
EP (1) EP2526742B1 (fr)
CN (1) CN103202104A (fr)
WO (1) WO2012062556A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013219694A1 (de) * 2013-09-30 2015-04-02 Automotive Lighting Reutlingen Gmbh Verfahren zum Betreiben einer Gasentladungslampe eines Lichtmoduls

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5691605A (en) * 1995-03-31 1997-11-25 Philips Electronics North America Electronic ballast with interface circuitry for multiple dimming inputs
GB2325099A (en) * 1997-05-07 1998-11-11 David John Aarons Gas discharge lamp drive circuit; dimming
JP2002134287A (ja) * 2000-10-24 2002-05-10 Tdk Corp 放電灯点灯方法及び装置
JP3893042B2 (ja) * 2001-10-26 2007-03-14 松下電器産業株式会社 高圧放電ランプの点灯方法、点灯装置及び高圧放電ランプ装置
KR100915850B1 (ko) * 2001-11-30 2009-09-07 코닌클리케 필립스 일렉트로닉스 엔.브이. Hid 램프를 구동시키는 방법 및 장치
JP4244747B2 (ja) * 2002-11-08 2009-03-25 ウシオ電機株式会社 高圧放電ランプ点灯装置
JP4637675B2 (ja) * 2005-07-27 2011-02-23 三菱電機株式会社 ランプ点灯装置
JP4470985B2 (ja) * 2007-09-28 2010-06-02 セイコーエプソン株式会社 光源装置、及びプロジェクタ
JP4697326B2 (ja) * 2009-04-01 2011-06-08 ウシオ電機株式会社 高圧放電ランプ点灯装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012062556A1 *

Also Published As

Publication number Publication date
US20130229128A1 (en) 2013-09-05
EP2526742B1 (fr) 2014-06-11
CN103202104A (zh) 2013-07-10
WO2012062556A1 (fr) 2012-05-18

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