EP1844634A1 - Procede pour faire fonctionner une lampe a decharge haute pression, appareil destine a faire fonctionner une lampe a decharge haute pression et dispositif d'eclairage - Google Patents

Procede pour faire fonctionner une lampe a decharge haute pression, appareil destine a faire fonctionner une lampe a decharge haute pression et dispositif d'eclairage

Info

Publication number
EP1844634A1
EP1844634A1 EP06705867A EP06705867A EP1844634A1 EP 1844634 A1 EP1844634 A1 EP 1844634A1 EP 06705867 A EP06705867 A EP 06705867A EP 06705867 A EP06705867 A EP 06705867A EP 1844634 A1 EP1844634 A1 EP 1844634A1
Authority
EP
European Patent Office
Prior art keywords
lamp
pressure discharge
discharge lamp
voltage
period
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.)
Withdrawn
Application number
EP06705867A
Other languages
German (de)
English (en)
Inventor
Michael Bönigk
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
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1844634A1 publication Critical patent/EP1844634A1/fr
Withdrawn legal-status Critical Current

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
    • H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2925—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp 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
    • H05B41/292—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
    • 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 operating a high-pressure discharge lamp according to the preamble of patent claim 1 and to an operating device having a device for carrying out the method and to a lighting device having a high-pressure discharge lamp and an operating device.
  • a disadvantage of this method and this operating device is that in this way only a strong flickering of the discharge arc, which causes the discharge arc temporarily extinguished, can be detected. It is not possible with the aid of this method and this operating device to detect the precursors of the strong flicker, for example flickering of the discharge arc, which does not temporarily extinguish it, but only in comparatively slight fluctuations of the burning voltage of the high-pressure discharge lamp or the lamp current expresses.
  • a further disadvantage of the method and the operating device according to the aforementioned patent specification is that in this method and operating device a distinction is made between the flickering of the discharge arc. gens due to reaching the end of the life of the lamp and the fluctuations of the discharge arc due to vibration or vibration of the high pressure discharge lamp is not possible. As a result, such fluctuations are detected by the operating device according to the aforementioned prior art as a fault in the lamp.
  • the method according to the invention for operating a high-pressure discharge lamp with a voltage with periodically alternating polarity includes monitoring the occurrence of flickering or flickering conditions in the high-pressure discharge lamp and additionally monitoring the occurrence of shock or vibration in the high-pressure discharge lamp. This ensures that fluctuations in the discharge arc of the high-pressure discharge lamp due to vibrations or vibrations of the high-pressure discharge lamp are not confused with flickering or flickering states of the high-pressure discharge lamp and as a defect in the lamp.
  • the monitoring of vibrations or vibrations is performed only during the occurrence of flicker flicker states of the high pressure discharge lamp to make the process as effective as possible and because only when flicker or Flimmerzuêtn must be decided whether the fluctuations of the discharge arc caused by shock or vibration of the high pressure discharge lamp and disappear after the disappearance of shock or vibration again.
  • This lamp operating parameter is preferably either the burning voltage of the high-pressure discharge lamp or the lamp current, since both lamp operating parameters are measured and evaluated by the operating device during lamp operation for power control of the high-pressure discharge lamp anyway and in both lamp operating parameters fluctuations of the discharge arc of the high-pressure discharge lamp, for example due to flickering or flickering or due to shock or vibration.
  • the burning voltage is the operating voltage of the high-pressure discharge lamp or the voltage at the high-pressure discharge lamp after completion of its ignition and starting phase in quasi-stationary operation.
  • FIG. 1 flicker lamp voltage mode 1 on the first half of a few half-waves of the burning voltage are caused by flickering of the discharge arc.
  • FIG. 2 shows the combustion voltage curve for a high-pressure discharge lamp with excessive burning voltage.
  • FIG. 3 shows the combustion voltage curve for a further flicker state of the high-pressure discharge lamp. Flickering influences the level of the burning voltage with two half-waves. In particular, the burning voltage also has an excessive value in the second half of the half-waves.
  • the burning voltage of the high-pressure discharge lamp has a modulated course, which is caused by vibrations or vibrations of the lamp.
  • FIG. 5 shows in the upper curve the time curve of the burning voltage for the two abovementioned flicker states and in the lower curve the associated time profile of the luminous flux emitted by the discharge arc.
  • At least one measured value of the lamp operating parameter is determined during a first time period and at least one measured value of the lamp operating parameter during a second time period, wherein the first period within the first half and the second measured value within the second half of the time interval a half-wave of the periodic voltage is arranged.
  • a first comparison variable is advantageously formed from the at least one measured value during the first time period and the at least one measured value from the second time period, which is compared with a predetermined first reference value for the first comparison quantity.
  • flicker states of the high-pressure discharge lamp according to FIG. 1 can be detected.
  • a second comparison variable is formed, which is compared with a predetermined second reference value for the second comparison variable.
  • flicker states of the high-pressure discharge lamp according to FIG. 3 can be detected.
  • the maximum and the minimum value are advantageously determined from the measured values which were determined during the second time periods over a plurality of half-waves, and from this a third comparison variable is formed. which is compared with a predetermined third reference value for the third comparison variable.
  • a modulation of the lamp burning voltage according to FIG. 4 can be detected.
  • the measured values from the second periods of the periodic voltage half-cycles are advantageously additionally compared with a predetermined fourth reference value.
  • the predetermined reference values are advantageously predefined such that the second reference value is greater than the sum of the third and fourth reference values. This ensures that the combination of a high lamp burn voltage with the occurrence of shock or vibration below the fourth or third reference value is not erroneously evaluated as having a flicker condition.
  • measured values were determined in the case of a high-pressure discharge lamp during trouble-free lamp operation and from this first to fourth comparison variables were formed in the manner described above. From the respective comparison variable, the corresponding predetermined reference or threshold value was formed by adding a predefinable tolerance. It has proven particularly effective to determine only one measured value during each of the first and second time periods.
  • the measured value per period of time is completely sufficient to detect the above-mentioned operating states.
  • this also eliminates complex, the evaluation unit burdening algorithms for averaging.
  • the measured value determined from the first period immediately after the polarity change and the measured value from the second period immediately before the polarity change at the corresponding half-wave of the periodic voltage is determined from the first period immediately after the polarity change and the measured value from the second period immediately before the polarity change at the corresponding half-wave of the periodic voltage.
  • the operating device for a high-pressure discharge lamp is equipped with a voltage supply circuit for applying a voltage of alternating polarity to the high-pressure discharge lamp and a device for carrying out the method explained above.
  • the aforementioned device preferably has a measuring device for the iterative measurement of a lamp operating parameter, which is influenced by a flickering or flickering state of the high-pressure discharge lamp and vibrations or vibrations, and an evaluation unit which serves for the evaluation of the measured values determined by the measuring device.
  • the evaluation unit preferably comprises a programmatically operating microcontroller or a logic circuit or a combination of both in order to enable a digital or analog or analog-digital evaluation of the measured data.
  • the operating device according to the invention and the high-pressure discharge lamp connected to the operating device are part of a wiring system, preferably a vehicle light.
  • the high-pressure discharge lamp serves as a light source of the vehicle headlight.
  • the method according to the invention makes it possible to distinguish fluctuations of the discharge arc of the high-pressure discharge lamp due to vibrations or vibrations of flicker or flicker states of the high-pressure discharge lamp.
  • Figure 1 is a schematic representation of the time profile of the burning voltage of a high-pressure discharge lamp during a first flicker condition
  • Figure 2 is a schematic representation of the time course of the burning voltage of a high-pressure discharge lamp, which indicates an excessive voltage
  • Figure 3 is a schematic representation of the time course of the burning voltage of a high-pressure discharge lamp during a second flicker condition
  • Figure 4 is a schematic representation of the time course of the burning voltage of a high-pressure discharge lamp, the vibration or vibration is exposed
  • FIG. 5 shows a comparison of the time course of the lamp firing voltage (flicker modes 1 and 2) and the luminous flux of the high-pressure discharge lamp
  • Figure 6 is a block diagram according to the first embodiment of an operating device for a high-pressure discharge lamp for carrying out the method according to the invention
  • Figure 7 shows the time course of the lamp burning voltage over several periods with assignment of the measuring times for the inventive method
  • FIG. 8 A flowchart of the evaluation algorithm according to the preferred exemplary embodiment of the method according to the invention
  • Figure 9 is a block diagram according to the second embodiment of an operating device for a high-pressure discharge lamp for carrying out the method according to the invention
  • Figure 10 is a schematic representation of the subdivision of the half-waves of the lamp burning voltage and the evaluation of the temporal Brennêts- course
  • FIG. 6 shows a block diagram of an operating device for a high-pressure discharge lamp according to the first exemplary embodiment, on the basis of which the operating method for the high-pressure discharge lamp according to the invention is described below. which is described.
  • the high-pressure discharge lamp is a halogen metal vapor high-pressure gas discharge lamp with an electrical power consumption of about 35 watts, which is used as a light source in a motor vehicle headlight.
  • the operating device is powered by the vehicle electrical system voltage of the motor vehicle. It essentially comprises a full-bridge inverter in whose bridge branch the high-pressure discharge lamp is connected, a DC supply circuit for the full-bridge inverter and an igniter for igniting the gas discharge in the high-pressure discharge lamp and a microcontroller for controlling the full-bridge inverter and its DC voltage supply circuit. Details of the circuit arrangement of such an operating device are disclosed, for example, in the book "Control gear and circuits for electric lamps" by C. H. Sturm and E. Klein, Siemens Aktiengesellschaft, 6th edition of 1992, on pages 217 to 218.
  • the high-pressure discharge lamp is operated by means of the full-bridge inverter with a substantially rectangular alternating voltage with a frequency of approximately 360 hertz.
  • the lamp current and the burning voltage of the high-pressure discharge lamp for power control of the lamp are measured and evaluated.
  • the microcontroller and a measuring device designed as an RC element per half-wave of the substantially rectangular lamp burning voltage two measured values of the lamp burning voltage are determined and evaluated in order to detect the occurrence of flickering or flickering conditions in the high-pressure discharge lamp.
  • the corresponding input of the microcontroller ( ⁇ controller) is connected in parallel to the capacitor C of the RC element in FIG.
  • the time constant of the RC element or low-pass filter is very small compared to half the period of the lamp voltage.
  • FIG. 7 schematically illustrates the time profile of the lamp burning voltage over a plurality of periods.
  • each half-wave of the lamp burning voltage become a first measured value Ux_l, which within the first half of the half wave and a second measured value Ux_2 lying within the second half of the half-wave is measured.
  • the first measured value Ux_l from each half-wave is determined immediately after the polarity change of the lamp burning voltage and the second measured value Ux_2 is determined immediately before the next polarity change of the lamp burning voltage.
  • the measured values Ux_l have a higher magnitude than the measured values Ux_2 of the same half-wave due to voltage peaks immediately after each polarity change of the lamp burning voltage.
  • the measured value Ux_2 essentially correspond to the height of the plateau of the rectangular half-wave.
  • the difference Ux_l-Ux_2 is compared with the predetermined reference value or threshold value Dn_F for this difference for each half-wave of the lamp burn voltage. If the difference exceeds this threshold value, then this value is evaluated as the presence of a flicker state and the counter FZ_1 is increased by a specific value, for example by one.
  • the maximum measured value Ux_2_max and minimum value Ux_2_min of the second measured values Ux_2 are determined over a period of several half-cycles of the lamp firing voltage.
  • the abovementioned maximum and minimum values are determined independently of the result of the preceding test for the presence of a flicker condition.
  • the abovementioned extreme values Ux_2_max and Ux_2_min are only determined after the presence of a flicker state has already been detected and the counter FZ_1 has been incremented.
  • the second measured values Ux_2 of each half-wave of the lamp burning voltage are compared with a predetermined reference value Un_2_La_max, to monitor the exceeding of a maximum value for the lamp power supply.
  • a predetermined reference value or threshold Un_2_La_max leads to an incrementation of the counter LüZ_l.
  • the counter LüZ_l is increased by 1 in this case.
  • the second measured values Ux_2 of each half-wave of the lamp burning voltage are additionally compared with the predetermined reference value Un_2_Flicker2, which is greater than the reference value Un_2_La_max, in order to prove the presence of a flicker state according to FIG.
  • Un_2_Flicker2 When the reference value or threshold value Un_2_Flicker2 is exceeded, the same counter FZ_1, which has already been used to detect the flicker state according to FIG. 1 (flicker lamp voltage mode 1), is incremented. Since the flicker state according to FIG. 3 (flicker lamp voltage mode 2) represents a significantly greater disturbance of the lamp operation than the flicker state according to FIG. 1, the counter FZ_1 is incremented more strongly in this case, ie increased by the value 2 than in the first flicker state. That is, the flicker states of FIGS. 1 and 3 are weighted in the ratio of 1 to 2.
  • Timerl t_Timerl which here is 0.5 seconds and extends over 360 Halbwcllen the lamp voltage has expired. Accordingly, the above-described procedure is repeated for the next half cycle or the vibration detection is performed.
  • the extreme values Ux_2_max. Ux_2_min. which were determined during the aforementioned time period t_Timerl from the measured values Ux_2, the difference Ux_2_max - Ux_2_min formed and compared with the predetermined reference value or threshold value Dn_V for this difference. If this difference exceeds the predefined threshold value Dn_V, then this is evaluated as an influence on the lamp firing voltage by vibrations or vibrations and the counters FZ_1, LüZ_l and Timerl are deleted or reset. Likewise, the extreme values Ux_2_max and Ux_2_min are also cleared and checked as to whether the time duration t_Timer2 determined by the timer 2 has already expired.
  • time t_Timer2 If the time t_Timer2 has not yet expired, it returns to the beginning of the algorithm. and repeat the procedure for the next half-cycles of the lamp burn voltage. That is, those half-waves of the lamp burn voltage which have been affected by shock or vibration are not used for evaluating flicker states or excessive lamp burn voltage. The other case will be explained below.
  • the current state of the counter LüZ_l for excessive lamp voltage with the predetermined maximum allowable value LüZn_l for the count of the counter LüZ_l is compared and increments when exceeding this allowable maximum value of the counter LüZ_2, which counts the events of excessive lamp voltage during the period t_Timer2.
  • the counters FZ_1, LüZ_l and Timeii are deleted or reset.
  • the extreme values Ux_2_max and Ux_2_min are also cleared and it is checked whether the time period t_Timer2 determined by timer 2 has already expired. If the time t_Timcr2 has not yet elapsed, the algorithm returns to the beginning of the algorithm and repeats the procedure for the next half-cycles of the lamp burn voltage.
  • the current value of the counter FZ_2 is compared with a predefined permissible maximum value FZn_2 for the count of the counter FZ_2.
  • a status bit for the presence of a flicker condition is set, for example, to trigger a corresponding display in a display or bring about a shutdown of the operating device or the high-pressure discharge lamp.
  • the current value of the counter LüZ_2 is compared with a predetermined permissible maximum value LüZn_2 for the counter reading of the counter LüZ_2.
  • a status bit for the presence of an excessive lamp voltage is set, for example, to trigger a corresponding display in a display or to bring about a shutdown of the operating device or the high-pressure discharge lamp.
  • the timer 2 is subsequently reset and the counters FZ_2 and LüZ__2 are cleared and returned to the beginning of the algorithm in order to run through it again for the next half-cycles of the lamp-burning voltage.
  • Dn_F and Dn_V are permanently stored in a memory element of the operating device or of the microcontroller and have the same values for each operating device of the same type.
  • a reference lamp was operated on a reference operating device under defined operating conditions, and the time course of the lamp burning voltage was measured for the operating situations illustrated in FIGS. 1 to 4 and for trouble-free lamp operation.
  • the comparison of the lamp burning voltage during the trouble-free lamp operation with the lamp burning voltage during each of the situations illustrated in FIGS. 1 to 4 makes it possible to define the abovementioned predetermined reference values, at which the trouble-free lamp operation is exceeded.
  • the first, predetermined reference or threshold value For example, to determine the first, predetermined reference or threshold value during the trouble-free operation of the reference lamp on the reference operating device in the manner described above, measured values Ux_l, Ux_2 were determined and their difference formed.
  • the first, predetermined reference value or threshold value was determined by adding a predefinable tolerance to the difference Ux_l-Ux_2 of the aforementioned measured values Ux_l, Ux_2.
  • the other predetermined reference or threshold values were determined.
  • the predetermined reference value Un_2_Flicker2 is greater than the sum of the predetermined reference values Un_2_La_max and DnJV in order to avoid confusing a high lamp burn voltage with a flicker state.
  • the predetermined permissible maximum values for the counter reading of the counters FZn_l, LüZn_l, FZn_2 and LüZn_2 are either also permanently stored in a memory element of the operating device or of the microcontroller and are the same for each operating device of the same type, or are alternatively implemented by those implemented in the microcontroller Software set.
  • the permissible maximum value FZn_l is reached if the difference Ux_l-Ux_2 is greater than DnJF at 70% of the half-waves of the lamp firing voltage from the period t_Timerl or the measured value Ux_2 is greater than Un_2_Flicker2 at 35% of the half-waves of the lamp firing voltage from the period tjrimerl (ratio 1 to 2 [35% / 70%] with a weight of 1 to 2).
  • the permissible maximum value LüZn_l for the counter LüZ_l for the excessive lamp burning voltage is achieved if the measured value Ux_2 is greater than the reference value Un_2_La_max at 97% of the half-waves of the lamp burning voltage from the period tJTimerl.
  • the other permissible maximum values FZn_2 and LüZn_2 for the counters FZ_2 and LüZ_2 can also be defined.
  • the difference between the measured values Ux_l, Ux_2 and the extreme values Ux_2_max and Ux_2_min is evaluated.
  • This method has the advantage that detection of disturbances of the lamp operation is independent of the level of the lamp burning voltage.
  • the quotient of the abovementioned measured values or extreme values could also be evaluated for comparison with a predetermined reference value.
  • FIG. 9 shows a block diagram of an operating device according to the second exemplary embodiment of the invention.
  • the operating device according to the second exemplary embodiment has a mixed analogue digital evaluation unit.
  • the operating device according to the block diagram of FIG. 9 also comprises a full-bridge inverter with a high-pressure discharge lamp connected in the bridge branch and an igniter for the lamp and a DC supply circuit for the full-bridge inverter.
  • the operating device has a microcontroller ( ⁇ controller) for controlling the full-bridge inverter and its DC voltage supply circuit.
  • the operating device according to the second exemplary embodiment differs from the operating device according to the first exemplary embodiment only by the analogue evaluation unit, which consists of a plurality of operational amplifiers and sample and hold elements and which is connected upstream of the microcontroller.
  • the high-pressure discharge lamp is operated by means of the full-bridge inverter with a substantially rectangular alternating voltage with a frequency of approximately 360 hertz.
  • the lamp current and the burning voltage of the high-pressure discharge lamp for power control of the lamp are measured and evaluated.
  • the algorithm described above is essentially carried out by means of the microcontroller and by means of the evaluation unit shown schematically in FIG. 9, which is connected between the terminals of the microcontroller and the center tap between the full-bridge inverter and its DC voltage supply circuit.
  • the reference symbols Ux_l, Ux_2 do not designate the two measured values from the first or second half of each half-wave of the lamp voltage, but average values of the lamp voltage which are output by the analog evaluation unit from the measured values during the first time period t1 or during the first time period second period t2 are formed for each half-wave of the lamp burning voltage, wherein the first period tl at each half-wave of the lamp voltage over a part of the first half of this half-wave or over the entire first half of the half-wave extends and the second period t2 at each half-wave of the lamp burning voltage over part of the second half of this half-wave or over the entire second half of this half-wave of the lamp burning voltage - for example, from tl to T / 2 - extends.
  • FIG. 10 schematically shows the time profile of the burning voltage (UJ lamp) of the high-pressure discharge lamp and the division of the half-waves of the burning voltage into two halves with the time intervals t 1, t 2 and the period T of the burning voltage.
  • the gray-colored rectangles Ux_l, Ux_2 in the middle part of FIG. 10 symbolize that during the time intervals t1, t2 measured values of the lamp firing voltage are determined and from this by adding or integrating these measured values over the time intervals t1, t2 for each time interval t1 or t2, respectively a mean value Ux_l or Ux_2 of the lamp firing voltage representative of this time interval is formed and used for further evaluation.
  • the absolute values of the mean values Ux_l, Ux_2 are used for the evaluation.
  • the lower part of FIG. 10 shows the difference between the mean values Ux_l, Ux_2 on an enlarged scale for the vertical axis and the corresponding predefined first reference or threshold value Dn_F, which is designated in FIG. 10 as a trigger threshold.
  • the mean value Ux_l of each half watt of the lamp firing voltage is supplied to the first input of the operational amplifier D_F and the mean value Ux_2 of the same halfwave of the lamp firing voltage is supplied to the second, imerting input of the operational amplifier D_F.
  • the output signal of the operational amplifier D_F (differential former) is fed to the first input of a further operational amplifier whose second input is supplied with the predetermined reference value Dn_F for the flicker state according to FIG.
  • This operational amplifier works like a threshold switch. Its output is connected to an input of the microcontrouter.
  • the maximum and minimum values are determined from the average values Ux_2 of different half-waves of the lamp firing voltage by means of sample and hold elements and supplied to one input of the operational amplifier D_V in each case.
  • the difference signal at the output of the operational amplifier D_V is fed to the first input of a second operational amplifier operating as a threshold value switch. leads whose second input is supplied with the predetermined reference value Dn_V for vibration detection.
  • the output of this second operational amplifier operating as a threshold value switch is connected to an input of the microcontroller.
  • the average values Ux_2 from the second period t2 of the half-waves of the lamp-burning voltage are additionally respectively the first input of an operational amplifier designed as a threshold value switch, the second input with the predetermined reference value U_La_max for the maximum permissible lamp voltage or with the predetermined reference value Un_2_Fücker2 for the detection of the flicker condition shown in FIG 3 is supplied.
  • the output of the two aforementioned, designed as a threshold value operational amplifier is respectively connected to an input of the microcontroller.
  • a corresponding status bit for the occurrence of a flicker condition or an excessive lamp operating voltage is set as a function of the output signal of the aforementioned operational amplifier operating as a threshold value switch and, if appropriate, the shutdown of the operating unit is triggered. If, during the monitored period of time, the occurrence of shock or vibration has been detected, the evaluation of the half-waves of the lamp burn voltage with respect to the flicker states shown in FIGS. 1 and 3 and the excessive lamp burn voltage shown in FIG. 2 are suspended for this period.
  • the predetermined reference values Dn_F, Dn_V, Un_2_Flicker2 and Un_2_La_max or U_La_max have different values for the two exemplary embodiments.
  • the invention is not limited to the embodiments explained in more detail above. For example, it is not necessary to use and evaluate each half-wave of the lamp voltage for monitoring the lamp voltage. It suffices if, for example, only the half-worlds of one polarity are evaluated for the monitoring.
  • the lamp voltage instead of the lamp voltage also a other lamp operating parameters, which is affected by flickering conditions and vibration or vibration of the lamp, for example, the lamp current used to monitor the high pressure discharge lamp.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner une lampe à décharge haute pression avec une tension électrique à polarité alternée périodiquement, lequel procédé consiste à surveiller, pendant le fonctionnement de la lampe, si la lampe à décharge haute pression se trouve dans un état de papillotement ou de scintillement, si des secousses ou des vibrations apparaissent et, de préférence, si des paramètres statiques de la lampe à décharge haute pression sont dépassés (p. ex. surtension de la lampe).
EP06705867A 2005-02-02 2006-01-31 Procede pour faire fonctionner une lampe a decharge haute pression, appareil destine a faire fonctionner une lampe a decharge haute pression et dispositif d'eclairage Withdrawn EP1844634A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005004916.8A DE102005004916B4 (de) 2005-02-02 2005-02-02 Verfahren zum Betreiben einer Hochdruckentladungslampe und Betriebsgerät für eine Hochdruckentladungslampe sowie Beleuchtungseinrichtung
PCT/DE2006/000137 WO2006081797A1 (fr) 2005-02-02 2006-01-31 Procede pour faire fonctionner une lampe a decharge haute pression, appareil destine a faire fonctionner une lampe a decharge haute pression et dispositif d'eclairage

Publications (1)

Publication Number Publication Date
EP1844634A1 true EP1844634A1 (fr) 2007-10-17

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EP06705867A Withdrawn EP1844634A1 (fr) 2005-02-02 2006-01-31 Procede pour faire fonctionner une lampe a decharge haute pression, appareil destine a faire fonctionner une lampe a decharge haute pression et dispositif d'eclairage

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Country Link
US (1) US20080088253A1 (fr)
EP (1) EP1844634A1 (fr)
JP (1) JP2008529245A (fr)
CN (1) CN101112130A (fr)
DE (1) DE102005004916B4 (fr)
WO (1) WO2006081797A1 (fr)

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DE102005004916B4 (de) 2015-06-25
US20080088253A1 (en) 2008-04-17
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WO2006081797A1 (fr) 2006-08-10
DE102005004916A1 (de) 2006-08-03

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