EP1958488A1 - Procede de detection de defauts lors de l'utilisation de lampes a decharge gazeuse haute pression sur des ballasts electroniques - Google Patents

Procede de detection de defauts lors de l'utilisation de lampes a decharge gazeuse haute pression sur des ballasts electroniques

Info

Publication number
EP1958488A1
EP1958488A1 EP06830156A EP06830156A EP1958488A1 EP 1958488 A1 EP1958488 A1 EP 1958488A1 EP 06830156 A EP06830156 A EP 06830156A EP 06830156 A EP06830156 A EP 06830156A EP 1958488 A1 EP1958488 A1 EP 1958488A1
Authority
EP
European Patent Office
Prior art keywords
state
lamp
voltage
operating
states
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Withdrawn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
EP06830156A
Other languages
German (de)
English (en)
Inventor
Stefan Boldt
Joachim MÜHLSCHLEGEL
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 EP1958488A1 publication Critical patent/EP1958488A1/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Withdrawn legal-status Critical Current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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase
    • H05B41/388—Controlling the intensity of light during the transitional start-up phase for a transition from glow to arc

Definitions

  • the invention is based on a method for fault detection when operating high-pressure discharge lamps on electronic ballasts, in particular on electronic ballasts with an integrated microprocessor, in accordance with the preamble of claim 1.
  • electronic ballasts in particular on electronic ballasts with an integrated microprocessor, in accordance with the preamble of claim 1.
  • These are in particular metal halide lamps, in particular for general lighting, or else high-pressure sodium lamps.
  • EVG stands for electronic ballast.
  • a method for operating a high-pressure discharge lamp is known from EP-A 1 476 003, in which a detection device attempts to prevent malfunction. Presentation of the invention
  • the change of the states of the automaton is indeed just ⁇ if controlled by voltage and time parameters, ent but ⁇ distinguishing the order of the states.
  • Bisheri ⁇ ECGs cannot detect the so-called "incandescent mode", since this behaves electrically like a discharge from a highly burned lamp. With this strategy, the "incandescent mode" cannot arise at all, since outer bulb discharges lead to an immediate shutdown. There is still the security of not switching off good lamps by mistake.
  • the prerequisite is that the electronic ballast has a microprocessor
  • the state machine can be implemented The circuit technology (step-up converter, step-down divider, half bridge, full bridge etc.) is not affected by this.
  • the first state is the starting phase, which includes the ignition.
  • the ballast is after a ⁇ off the mains voltage. In this state, an attempt is made to ignite the lamp by supplying ignition voltage. It is irrelevant whether the device has pulse or resonance ignition.
  • the ignition state can only be exited by one of the following conditions:
  • the second state is startup, i.e. the setting of a starting current.
  • the ECG only goes into the run-up state after it has passed through the first state, i.e. only from the ignition state.
  • a run-up timer is started and the time-dependent limits of the voltage are compared with the lamp voltage. If the time-dependent limits are violated, this is a transition to a prohibited state, which leads to the ECG being switched off.
  • the runup state can be exited only by ⁇ conditions following Be:
  • the transition to the next state takes place after a time window which lies between two time values t1 and t2, in particular after 15 s at the earliest and after 160 s at the latest, and also if the operating voltage exceeds a threshold value, in particular if it exceeds 70 V. is. If the burning voltage rises above the threshold value before the start of the time window, for example already after 5 s, in this case to over 70 V, the machine switches to the prohibited state. This early error can be traced back to incandescent mode.
  • the third state is normal operation. The ECG only goes into the normal mode after the run-up state has been run through. The lamp's operating voltage is constantly checked during normal operation.
  • a timer is started in particular, window, the lamp after a time ⁇ , for example after 18 min., Shut off. If the value falls below a minimum permissible value, the lamp is switched off immediately. This prevents the operation of an outer bulb discharge.
  • the normal operation status can only be exited if at least one of the following conditions is met:
  • the TOE knows a fourth state, the so-called forbidden state.
  • the TOE comes into the prohibited state if the conditions for a change of state as described above are not met. This is either a violation of a voltage limit or a combination of time and voltage limits.
  • the ECG is switched off in the prohibited state.
  • Another state can only be reached after the network has been switched off and on.
  • the states can only in the order of 1 - will drive through ⁇ third This is the case for a normal, non-defective lamp. A change from 1 to 3 (synonymous with the occurrence of incandescent mode) or from 3 to 2 (synonymous with an outer bulb discharge) is not permitted and inevitably leads to the prohibited state.
  • High-pressure discharge lamps have the following steps, divided into states:
  • the so- ⁇ ring is selected that a connected lamp electrodes are not damaged; - Normal operation, whereby the nominal power intended for this should lead to a range of the permissible nominal voltage.
  • a detection device determines whether the set starting current has put the lamp into a state in which the lamp has reached the band of the permissible nominal voltage, a state machine monitoring the operation to ensure that a state of the run-up must be completed within a predetermined time window .
  • a state machine is a machine with a memory that can react differently to the same input variables depending on the internal state of the memory. An example of this is a flip-flop.
  • the state machine preferably detects at least three different states, the start, the run-up and the
  • Startup can be divided into several sub-states. It is advantageous if these partial states clearly follow one another in time.
  • incandescent mode There is a lamp defect in discharge lamps for general lighting, which is known as "incandescent mode". This arises when the discharge vessel becomes impervious and the filling and filling gas reach the outer bulbs .
  • an outer bulb discharge can occur, especially if a sump of filling constituents forms in an outer bulb which is closed on one side.
  • material of the power supply in the outer bulb is evaporated, which is deposited on the inner wall of the outer bulb. There it forms conductive coatings. If the conductive pads are arranged in such a way that they have a connection to the power supply leads to “incandescent mode".
  • the "incandescent mode” is a glow of this Decision ⁇ lags by the current flow. This mode is generally indistinguishable from a lamp in the normal burned state based on the electrical parameters, since it has neither asymmetries nor operating voltages that differ from normal operation.
  • the state machine must use the same methods as described in the prior art to determine its state.
  • the incandescent mode or its emergence can only be determined by defining a very specific sequence in which these states run through. be connected. So the occurrence of the same input variable, for example: operating voltage as in normal operation), but a momentary internal state of the machine, which does not allow a subsequent state of "burnt-out lamp", leads to the shutdown.
  • the main fields of application are metal halide lamps, but also high pressure sodium lamps which have a discharge vessel in an outer bulb.
  • the state machine can from each other un ⁇ ter Kunststoffen the three states, in particular, it ensures that the Ü transition is excluded from state 1 to state. 3 In particular, it also ensures that the transition from state 3 to state 2 is excluded.
  • the invention also comprises an operating device for Operator Op ben ⁇ a high pressure discharge lamp, the Radio Op ben ⁇ advises particular a ballast is operated by a microprocessor- ⁇ sor, having the following features:
  • the operating device additionally comprises a ten touchingsautoma-, which is preferably part of the Detektionsein ⁇ is directional, or interacts with this.
  • the state machine can preferably be integrated in a microcontroller.
  • the program of the micro control lers also cover the state machine. It can in particular be accommodated in the control device, for example as an ASIC or control IC.
  • the control device is suitable for regulating the power of the connected lamp to a target power.
  • the actuating device is suitable for limiting a lamp current of the lamp to a limit value.
  • the Detekti- ons sheep is designed so that it means outputs a signal to a control ⁇ if a gastronoiinstel- system is too low to a connected lamp to put in a state in which the lamp assumes the desired power.
  • the control device specifies the limit value to the control device and, if necessary, increases the limit value if the detection device sends a signal to the control device. Details can be found, for example, in EP-A 1 476 003.
  • a faultless lamp (without Incandescent mode or other errors) is characterized by the fact that the operating voltage behaves steadily when the lamp starts up and even increases monotonously in certain areas.
  • the lamp current is specified by the electronic ballast, it is referred to as the starting current.
  • the lamp current is normally specified approximately continuously.
  • ⁇ the voltage of the lamp changed so slowly that the timing of the operating voltage can be measured by a micro controller-without any technical difficulties.
  • Short temporal changes in the operating voltage which occur in the time range from less than 0.2 ms to less than 20 ms, are measured during averaging or suppressed by low-pass filtering.
  • the averaging or low-pass filtering can be analog or there and di ⁇ gital be made.
  • the first steep ⁇ An increased lamp voltage, the s s begins in the range 10 to 30 after the start of the lamp utilized. It is based mainly on the evaporation of Hg., Find the EB into ⁇ particular an evaluation unit in a microcontroller, must have a time-section of suitable length, in which the lamp voltage is strictly and Stei ⁇ supply the lamp voltage over time in a certain range of values.
  • a specific exemplary embodiment for a range of values for a 35 W lamp is a time window that is 4 s long.
  • the slope to the lamps ⁇ voltage for the entire duration of the time window in the loading reaching 1.5 V / s / s are to 6V.
  • ⁇ is preferably carried out in a suitable averaging over the portions of time in which the slope of the lamp voltage for a short time is negative or zero. The easiest way to filter out these areas.
  • a concrete example is a regulation for filtering out if the negative Range is less than 10% of the total length of the time window.
  • Figure 1 shows the operating voltage behavior during startup of a
  • FIG. 2 shows the starting behavior of a lamp over time
  • FIG. 3 shows the flow diagram with all states
  • FIG. 4 shows a diagram of an electronic ballast with a state machine
  • Figure 5 shows the startup behavior with several states.
  • Figure 1 shows the operating voltage (in volts) when starting up the electronic ballast from a total of 77 metal halide lamps.
  • lamp types from 35 - 150 W with quartz glass discharge tubes as well as with cylindrical and bulbous ceramic discharge tubes. All burning positions were also varied. Since these measurements halide lamps the full range of metal ⁇ covers for general lighting, can be seen from these curves close to the voltage and time limits which must lead to a shutdown.
  • a faultless lamp i.e. without incandescent mode or other errors, is characterized by the fact that the operating voltage behaves steadily when the lamp starts up and even increases monotonously in certain areas
  • FIG. 2 shows an example of the start-up of the operating voltage of a single metal halide lamp as a function of Time shown.
  • a curve defines the state "zuen ⁇ extension", which is limited to a maximum of 18 minutes.
  • Curve B defines the time window of the second state "run-up"; it is a minimum of 15 s and a maximum of 160 s.
  • the time-dependentchrosober- and lower limit BO and BU is additionally characterized introduced for the state "startup" ⁇ .
  • the third state Normal operation includes ⁇ N to.
  • the upper and lower limits NO and NU are not time-dependent.
  • the ignition itself and its time limit are not shown, only the time window is symbolized with the diamonds and the voltage range in which the ignition takes place is shown with the line Z.
  • the actual burning behavior of the lamp is labeled LP.
  • This figure illustrates the example of a Metallha- logenidlampe the two permissible state change from ⁇ to stand l-> 2 (line ZW 12) and of state 2-> 3 (line ZW 23). No other changes are permitted.
  • All values of the lower limit BU for the time-dependent startup of the lamp are stored as a table in the memory of a microprocessor.
  • the ceilings BO and NO ⁇ so as the lower limit in normal operation NU are individual values that are not time-dependent.
  • Figure 3 shows the flow diagram with all states. After switching on the mains voltage, a time window for the ignition timer starts. The lamp changes to state 1. If all criteria are met, the lamp changes to state 2 after a time window for the run-up timer has been started. If all criteria are met, the lamp changes to state 3, normal operation. The behavior in case of failure leads to state 4, the ver ⁇ botenen condition that leads to the switching off of the lamp.
  • FIG. 4 shows a schematic for a circuit of a metal halide lamp 1.
  • the electronic ballast 2 comprises a rectifier 3 and an actuator 4. This is implemented, for example, by a step-down divider.
  • the actuator 4 is connected to a detection device 5.
  • An essential component of this is microcontroller 6, or also an IC, with state machine 7.
  • Figure 5 shows a scheme with several states. After the start phase at Z, two time windows are monitored as states B1 and B2 in the region of the steep rise in Hg evaporation. In addition, the positive slope in the start-up between the starting point B1 and the start of normal operation N is monitored. The region BV of the hump, which hides the transition between the phase of the evaporation of the mercury and the evaporation of the metal halides, is hidden .

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Lors de l'utilisation d'une lampe à décharge gazeuse haute pression sur un ballast électronique fonctionnant au moyen d'un microprocesseur, on fait intervenir un automate d'état afin d'exclure certaines fonctions défectueuses.
EP06830156A 2005-12-06 2006-11-28 Procede de detection de defauts lors de l'utilisation de lampes a decharge gazeuse haute pression sur des ballasts electroniques Withdrawn EP1958488A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058222A DE102005058222A1 (de) 2005-12-06 2005-12-06 Verfahren zur Fehlerdetektion beim Betrieb von Hochdruckentladungslampen an EVGs
PCT/EP2006/069006 WO2007065814A1 (fr) 2005-12-06 2006-11-28 Procede de detection de defauts lors de l'utilisation de lampes a decharge haute pression sur des ballasts electroniques

Publications (1)

Publication Number Publication Date
EP1958488A1 true EP1958488A1 (fr) 2008-08-20

Family

ID=37685611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830156A Withdrawn EP1958488A1 (fr) 2005-12-06 2006-11-28 Procede de detection de defauts lors de l'utilisation de lampes a decharge gazeuse haute pression sur des ballasts electroniques

Country Status (7)

Country Link
US (1) US20090179571A1 (fr)
EP (1) EP1958488A1 (fr)
JP (1) JP2009518791A (fr)
CN (1) CN101356860A (fr)
CA (1) CA2630909A1 (fr)
DE (1) DE102005058222A1 (fr)
WO (1) WO2007065814A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE511741T1 (de) * 2008-02-04 2011-06-15 Uviterno Ag Verfahren zum betrieb einer uv-lampe
DE102009019156A1 (de) * 2009-04-28 2010-11-04 Osram Gesellschaft mit beschränkter Haftung Verfahren und elektronisches Vorschaltgerät zum Betreiben einer Hochdruckentladungslampe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075326A (en) * 1998-04-20 2000-06-13 Nostwick; Allan A. High intensity discharge lamp ballast and lighting system
JP3520795B2 (ja) * 1999-02-15 2004-04-19 松下電工株式会社 放電灯点灯装置
JP2003151787A (ja) * 2001-08-29 2003-05-23 Harison Toshiba Lighting Corp 高圧放電ランプ点灯装置および自動車用ヘッドライト装置
JP4350933B2 (ja) * 2002-03-29 2009-10-28 パナソニック株式会社 高圧放電ランプの点灯方法及び高圧放電ランプ装置
DE10319950A1 (de) * 2003-05-02 2004-11-18 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Betriebsgerät und Verfahren zum Betreiben von Gasentladungslampen
WO2005057990A1 (fr) * 2003-12-12 2005-06-23 Matsushita Electric Works, Ltd. Dispositif permettant de faire fonctionner une lampe a decharge haute pression et un instrument d'eclairage utilisant ce dispositif
US7622869B2 (en) * 2004-02-24 2009-11-24 Panasonic Electric Works Co., Ltd. Discharge lamp ballast and projector
DE102004058921A1 (de) * 2004-12-07 2006-06-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Betriebsgerät und Verfahren zum Betreiben von Gasentladungslampen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007065814A1 *

Also Published As

Publication number Publication date
CA2630909A1 (fr) 2007-06-14
JP2009518791A (ja) 2009-05-07
DE102005058222A1 (de) 2007-06-14
US20090179571A1 (en) 2009-07-16
CN101356860A (zh) 2009-01-28
WO2007065814A1 (fr) 2007-06-14

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