EP0252438B1 - Dispositif d'allumage pour lampes à décharge à haute pression - Google Patents

Dispositif d'allumage pour lampes à décharge à haute pression Download PDF

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Publication number
EP0252438B1
EP0252438B1 EP87109527A EP87109527A EP0252438B1 EP 0252438 B1 EP0252438 B1 EP 0252438B1 EP 87109527 A EP87109527 A EP 87109527A EP 87109527 A EP87109527 A EP 87109527A EP 0252438 B1 EP0252438 B1 EP 0252438B1
Authority
EP
European Patent Office
Prior art keywords
ignition
pressure discharge
voltage
discharge lamp
locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87109527A
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German (de)
English (en)
Other versions
EP0252438A1 (fr
Inventor
Heinz-Dieter Lingner
Horst Bunke
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.)
Norka Norddeutsche Kunststoff und Elektrogesellschaft Staecker mbH and Co KG
Original Assignee
Norka Norddeutsche Kunststoff und Elektrogesellschaft Staecker mbH and Co KG
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.)
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Publication date
Application filed by Norka Norddeutsche Kunststoff und Elektrogesellschaft Staecker mbH and Co KG filed Critical Norka Norddeutsche Kunststoff und Elektrogesellschaft Staecker mbH and Co KG
Priority to AT87109527T priority Critical patent/ATE62783T1/de
Publication of EP0252438A1 publication Critical patent/EP0252438A1/fr
Application granted granted Critical
Publication of EP0252438B1 publication Critical patent/EP0252438B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices

Definitions

  • the invention relates to an ignition device for high-pressure discharge lamps with a spark gap, which is connected in parallel to an ignition capacitor arrangement and feeds the primary winding of an ignition transformer, via the secondary winding behind which a ballast supply lines are connected to the high-pressure discharge lamp, the arrangement comprising a spark gap and an ignition capacitor having an alternating voltage via a High-voltage transformer is supplied, to the primary winding of which is connected an ignition termination switch which switches off the AC voltage from the primary winding and which can be controlled as a function of a signal determined by the operating state of the high-pressure discharge lamp, a locking circuit having a timing element being provided which, when the high-pressure discharge lamp is not ignited, has a predetermined value Adjusted speed and after a predetermined time, switching off the AC voltage from the primary
  • the coil of the high-voltage transformer causes (locking) if the high-pressure discharge lamp has not been ignited and the signal indicating the burning of the high-pressure discharge lamp controls the ignition termination switch without delay.
  • Such an ignition device is known from DE-AS 11 92 741 and DE-AS 29 38 529 and is on the market as a device from BAG.
  • the phase of an AC voltage supply is connected behind a ballast to the series connection of a first secondary winding of a Tesla transformer, the high-pressure discharge lamp and the second secondary winding of the Tesla transformer.
  • the free end of the second secondary winding of the Tesla transformer is connected to the neutral conductor of the voltage supply.
  • the primary winding of a high-voltage transformer is connected to the mains voltage via break contacts of two relays.
  • An ignition capacitor and a spark gap are connected to the secondary winding of the high-voltage transformer. The ignition capacitor is charged during each half-wave until the discharge voltage of the spark gap is reached.
  • the spark gap is in series with the primary winding of the Tesla transformer, so that in the case of the multiple discharges of the spark gap, one ignition pulse is transmitted to the high-pressure discharge lamp via the Tesla transformer.
  • These generated ignition pulses of 30 to 70 kV are regularly able to ignite a high-pressure discharge lamp even when it is hot.
  • the high-pressure discharge lamp is operated with the mains voltage, which is fed to the high-pressure discharge lamp via the secondary winding of the Tesla transformer.
  • an interruption in the supply of the alternating voltage to the primary winding of the high-voltage transformer takes place in that a temperature-dependent resistor heats up and thereby causes one of the relays to be pulled, as a result of which the relay interrupts the voltage supply to the primary winding.
  • the high-pressure discharge lamp ignites, a voltage drops across the ballast, as a result of which current is supplied to a second relay via an NTC resistor. If the resistance value of the NTC resistor has become small enough, the relay picks up and stops itself, so that through this relay the voltage supply to the primary winding of the High voltage transformer interrupted, ie the ignition is stopped.
  • the delay caused by the NTC in switching off the ignition attempts after the lamp has been ignited serves to bridge the time in which the high-pressure discharge lamp can go out again shortly after the first ignition.
  • the spark gaps therefore ignite many times, even though the high-pressure discharge lamp is already burning and may be burning stably.
  • the spark gap as a wearing part of the igniter is therefore subject to a high degree of unnecessary stress.
  • a similar igniter is known from DE-A-2 730 447.
  • This ignition device is switched off both in unsuccessful ignition attempts and when the lamp is ignited by means of timers, which in this case are formed by RC combinations.
  • timers which in this case are formed by RC combinations.
  • the high-pressure discharge lamp should be parallel to the switching relays in order to short-circuit the switching relays through the ignited lamp, the exemplary embodiment shown does not show this measure. It would also not be expedient because it would cause the high-pressure discharge lamp to switch on and off constantly in a pulsating manner.
  • the corresponding timer for switching off the ignition circuit after a defined delay time after the ignition of the high-pressure discharge lamp serves to ensure stable burning of the high-pressure discharge lamp.
  • a large number of sparks are produced by the spark gap, which are no longer necessary if the lamp burns stably after only a few attempts to ignite.
  • the invention has for its object to provide a starting device of the type mentioned that reacts quickly to the operating conditions that occur when the high-pressure discharge lamp is ignited and avoids unnecessary stress on the spark gap.
  • the locking circuit which is adjustable between an initial state and a locking state, can be adjusted by its timer when the high-pressure discharge lamp is ignited at a much lower speed in the direction of the initial state than in the direction of the locking state in the event of unsuccessful ignition attempts, and that the locking circuit adjusts from the instantaneous value in the direction of the locking state when the ignition is attempted again .
  • the mode of operation of the ignition device according to the invention is based on the fact that the operating state of the high-pressure discharge lamp directly controls the ignition termination switch, so that the ignition is ended immediately when the high-pressure discharge lamp is on.
  • the danger of constant flickering of the high-pressure discharge lamp, which is switched off in the known ignition devices by the delay circuit and which goes out again immediately after it is ignited, is switched off according to the invention in that the locking circuit can be reset electronically, the resetting being carried out much more slowly than the adjustment in the direction of the locking. If the high-pressure discharge lamp ignites and then immediately goes out again, the locking circuit is reset only slightly, so that the ignition attempts which then occur again result in an adjustment in the direction of locking.
  • a further adjustment device which effects the adjustment of the locking circuit in the direction of the initial state with a very low time constant when the mains voltage collapses.
  • the mean half-wave amplitude on the supply line is used as the signal determined by the operating state of the high-pressure discharge lamp and a level detection circuit is connected to the supply line.
  • a level detection circuit is connected to the supply line.
  • This expediently has an integration stage which brings about a second-order delay.
  • the mains voltage present on the supply line is deformed by the ignited high-pressure discharge lamp behind the ballast in such a way that an approximate square-wave voltage with a reduced level is established. Since the square wave voltage is provided with overshoot peaks, it is expedient to provide the level detection circuit with the integration stage, which eliminates the overshoot peaks due to the second-order delay and clearly recognizes and evaluates the reduced voltage level.
  • the locking circuit is formed by a storage capacitor arrangement, which is charged by the output signal of the detector circuit when the high-pressure discharge lamp is not ignited, the charge level of the storage capacitor arrangement controlling a switching stage which activates the ignition termination switch.
  • the storage capacitor arrangement forms the timing element with a resistor. If a discharge path is provided for the storage capacitor arrangement, which causes the storage capacitor arrangement to be discharged with a multiple discharge time, for example five to ten times the discharge time, the desired gradual locking is realized, with the momentary extinction of which ignited high-pressure discharge lamp, the storage capacitor arrangement may also have a residual charge and therefore only requires a residual charge up to the charge level activating the ignition termination switch.
  • the storage capacitor arrangement is connected to a terminal of the DC voltage supply, which does not carry the reference potential against which the storage capacitor arrangement is charged, in order to implement the sudden resetting of the locking circuit via a low-resistance discharge path, which is preferably formed by a diode.
  • a low-resistance discharge path which is preferably formed by a diode.
  • the drawing shows a circuit diagram of an embodiment of an ignition device according to the invention.
  • a normal AC line voltage is present between two supply lines L1, N.
  • the primary winding of a network transformer NT is connected to the two supply lines L1, N via a fuse Si1 and a switch S.
  • Parallel to this is a series ballast VG, usually formed by a choke, a second fuse Si2, a first part of the secondary winding of a Tesla transformer TT, the discharge path of a high-pressure discharge lamp L and the second part of the secondary winding of the Tesla transformer TT.
  • the series connection of a spark gap F and the secondary winding of a high-voltage transformer HT are connected to the two ends of the primary winding of the Tesla transformer.
  • Parallel to the secondary winding of the high-voltage transformer HT is an ignition capacitor arrangement made up of three capacitors C9, C10, C11 connected in series, each of which has a resistor R20, R22, R23 connected in parallel.
  • the secondary winding of the mains transformer NT feeds a full-wave rectifier bridge G1, the rectified output signal of which is smoothed by smoothing capacitors C1, C2 connected to the neutral conductor N and connected in parallel with one another.
  • the DC voltage smoothed in this way serves as a supply voltage for a first operational amplifier OV1, a second operational amplifier OV2 and a switching transistor TR2 and the associated wiring networks.
  • the detection circuit consists of a diode D1 to which a filter network consisting of two integrating RC elements R1, C3 and R2, C4 connected in series is connected to the neutral conductor N. Between the connection point of the resistor R2 and the capacitor C4, a trimming potentiometer TRP is connected to the neutral conductor. The tap of the trim potentiometer TRP is connected via a resistor R4 to the non-inverting input of the operational amplifier OV1. A reference voltage is present at the inverting input of the operational amplifier OV1, which is generated from the DC supply voltage with the aid of a voltage divider formed by a resistor R3 and a Zener diode ZD1.
  • the voltage drop across the Zener diode ZD1 is fed via a resistor R5 to the inverting input of the operational amplifier OV1.
  • a feedback branch with a resistor R6 is located between the output of the operational amplifier OV1 and its non-inverting input.
  • the output of the operational amplifier OV1 is connected via a resistor R12 to the base of the transistor TR2, the collector of which is connected to the positive DC supply voltage, so that the transistor TR2 is connected as an emitter follower. With the emitter, two voltage dividers from the resistors R14, R15 and R18, R19 are connected in parallel to each other against the neutral conductor N.
  • the tap of the first voltage divider R14, R15 is connected to the control electrode of a triac TRI1 and the tap of the second voltage divider R18, R19 is connected to the control electrode of a second triac TRI2.
  • Parallel to the first triac TRI1 is the parallel connection of a fixed resistor R17 and a voltage-dependent resistor VDR1
  • parallel to the second triac TRI2 is a second voltage-dependent resistor VDR2, all components being connected on one side to the neutral conductor N.
  • the other connection of the first triac TRI1 is connected via a resistor R16 to an auxiliary ignition capacitor C7, which is connected to line D.
  • the other terminal of the second Triacs TRI2 is connected via the primary winding of the high-voltage transformer HT to the connection point between the switch S and the primary coil of the mains transformer NT.
  • the output of the first operational amplifier OV1 is connected on the one hand via a resistor R7 to the positive DC supply voltage and via the series connection of a diode D2 and a resistor R8 to a parallel connection of two storage capacitors C5, C6, the other plates of which are connected to the neutral conductor N.
  • the positive plates of the two storage capacitors C5, C6 are connected to the non-inverting input of the second operational amplifier OV2.
  • This is connected via a resistor R9 to the neutral conductor N and a diode D3 polarized in the reverse direction to the positive DC supply voltage.
  • the output of the second operational amplifier OV2 is directly fed back to the inverting input, so that the operational amplifier OV2 acts as a voltage follower.
  • the output is also connected via a resistor R10 to the positive DC supply voltage and via a resistor R11 to the anode of a Zener diode ZD2, the cathode of which is at the base of a switching transistor TR1.
  • the base of the switching transistor TR1 is connected to the neutral conductor N via a resistor R13.
  • the emitter of the switching transistor TR1 is connected directly to the neutral conductor N, while its collector is connected to the cathode of a diode D4, the anode of which lies at the base of the transistor TR2.
  • the signal level prevailing on the supply line D leading to the phase is detected by the detector circuit in that the positive half-wave reaches the integration network R1, C3, R2, C4 via the diode D1, so that two different levels on the non- inverting input of the operational amplifier OV1 depending of whether the high-pressure discharge lamp L has ignited or not.
  • the level at the non-inverting input of the operational amplifier OV1 exceeds the reference level at the inverting input set by the Zener diode ZD1, so that a high voltage level is present at the output of the operational amplifier OV1, which is present at the base of the transistor TR2, so that it becomes a leader.
  • the two triacs TRI1 and TRI2 are switched on via the voltage dividers R14, R15 and R18, R19. Switching on the second triac TRI2 causes the mains voltage to be applied to the supply lines L1, N to the primary coil of the high-voltage transformer HT.
  • the ignition capacitor arrangement C9, C10, C11 is charged several times during a half-wave and discharged each time the ignition voltage of the spark gap F is reached.
  • the current pulses generated by the spark gap F are transformed into a very high voltage on the secondary side of the Tesla transformer TT via the Tesla transformer TT and serve to ignite the high-pressure discharge lamp L.
  • the auxiliary ignition capacitor C7 is activated via the first triac TRI1.
  • the positive potential at the output of the operational amplifier OV1 leads to a charging of the storage capacitors C5, C6 until after a predetermined time they reach the threshold value specified by the Zener diode ZD2 and the transistor TR1.
  • the transistor TR1 becomes conductive and the base of the transistor TR2 opens Zero potential drawn.
  • the transistor TR2 is thereby blocked and in turn blocks the two triacs TRI1 and TRI2, whereby the ignition process is ended.
  • the duration of the ignition process is determined by the timing element formed by the storage capacitors C5, C6 and the resistor R8 and by the threshold value set with the Zener diode ZD2 and the transistor TR1.
  • the storage capacitors C5, C6 remain charged, so that the entire circuit is locked and no further ignition can be carried out. A new ignition is only possible after the supply voltage on the supply lines L1, N has been switched off and the storage capacitors C5, C6 have been able to discharge via the diode D3. This ensures that if the ignition is unsuccessful, the circuit itself cannot attempt the ignition again.
  • the level at the non-inverting input of the operational amplifier OV1 falls below the level of the reference voltage at the inverting input.
  • the output signal of the operational amplifier OV1 suddenly becomes zero, as a result of which the transistor TR2 blocks and the triacs TRI1 and TRI2 are likewise blocked, so that the ignition process is terminated.
  • the circuit thus switches off the ignition generator within a few half-waves of the mains voltage when the high-pressure discharge lamp L has ignited. In this way, unnecessary further ignition pulses are effectively prevented.
  • the storage capacitors C5, C6 can discharge via the resistor R9 and are therefore returned to their initial state.
  • the storage capacitors C5, C6 may be only partially discharged before the output signal of the operational amplifier OV1 switches back to a positive level. The remaining charge of the storage capacitors C5, C6 is then recharged, if necessary until the threshold value of ZD2 and TR1 is reached. The ignition generator is active during this time. It can be clearly seen that the effective time of the ignition generator in this case is shorter than at the start of the ignition attempt, since the charging time of the storage capacitors C5, C6 has been shortened until the threshold voltage has been reached due to their residual charge. If the lamp ignites several times and then goes out again immediately afterwards, this cycle can only take place a few times until the storage capacitors C5, C6 lock the circuit and prevent further ignition attempts which would lead to an excessive load on the spark gap F.
  • the storage capacitor arrangement C5, C6 can suddenly discharge via the diode D3, as a result of which a desired sudden resetting of the locking circuit is realized in the event of a mains voltage breakdown.
  • the ignitor according to the invention therefore allows optimum use of the service life of the spark gap F and reliably prevents a longer flickering condition of the high-pressure discharge lamp L.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (7)

  1. Dispositif d'allumage pour lampes à décharge à haute pression (L), avec un éclateur (F) qui est monté en parallèle sur un agencement à condensateurs d'allumage (C9, C10, C11) et alimente l'enroulement primaire d'un transformateur d'allumage (TT), des lignes d'alimentation (D, N) situées en aval d'un ballast (VG) étant reliées à la lampe à décharge à haute pression (L) par l'intermédiaire de l'enroulement secondaire du transformateur d'allumage (TT), une tension alternative étant fournie à l'agencement formé de l'éclateur (F) et des condensateurs d'allumage (C9, C10, C11) par l'intermédiaire d'un transformateur à haute tension (HT) dont l'enroulement primaire est relié à un interrupteur d'arrêt d'allumage (TR12) coupant la tension alternative de l'enroulement primaire et pouvant être commandé en fonction d'un signal déterminé par l'état de fonctionnement de la lampe à décharge à haute pression (L), un circuit de verrouillage (C5, C6, OV2, TR1) étant prévu avec un élément à retard qui, lorsque la lampe à décharge à haute pression (L) ne s'est pas allumée, change d'état à une vitesse prédéterminée et, après un temps prédéterminé, provoque une coupure de la tension alternative de l'enroulement primaire du transformateur à haute tension (HT) (verrouillage) si aucun allumage de la lampe à décharge à haute pression (L) ne s'est produit, et le signal indiquant que la lampe à décharge à haute pression (L) est allumée commandant sans retard l'interrupteur d'arrêt d'allumage (TRI2), caractérisé en ce que le circuit de verrouillage à état réglable entre un état fondamental et un état de verrouillage peut changer d'état du fait de son élément à retard, à une vitesse sensiblement plus faible dans le sens de l'état fondamental lors de l'allumage de la lampe à décharge à haute pression que dans le sens de l'état de verrouillage en cas d'essais d'allumage infructueux, et en ce que le circuit de verrouillage, lors de nouveaux essais d'allumage, change d'état en partant de la valeur instantanée du moment dans le sens de l'état de verrouillage.
  2. Dispositif d'allumage selon la revendication 1, caractérisé par un autre dispositif de changement d'état (D3) qui provoque le changement d'état du circuit de verrouillage dans le sens de l'état fondamental avec une constante de temps très courte en cas d'écroulement de la tension du secteur.
  3. Dispositif d'allumage selon la revendication 1 ou 2, caractérisé en ce que, comme signal déterminé par l'état de fonctionnement de la lampe à décharge à haute pression (L), on utilise l'amplitude moyenne de demi-onde sur la ligne d'alimentation (D), et en ce qu'un circuit de détection de niveau est relié à la ligne d'alimentation (D).
  4. Dispositif d'allumage selon la revendication 3, caractérisé en ce que le circuit de détection de niveau comporte un étage intégrateur (R1, C3, R2, C4) qui produit un retard du second ordre.
  5. Dispositif d'allumage selon l'une des revendications 1 à 4, caractérisé en ce que le circuit de verrouillage est formé par un agencement à condensateurs accumulateurs (C5, C6) qui est chargé par le signal de sortie du circuit détecteur de niveau dans le cas où la lampe à décharge à haute pression (L) ne s'est pas allumée, et en ce que le niveau de charge de l'agencement à condensateurs accumulateurs (C5, C6) commande un étage de commutation (OV2, TR1) qui active l'interrupteur d'arrêt d'allumage (TRI2).
  6. Dispositif d'allumage selon la revendication 5, caractérisé en ce qu'il comporte un chemin de décharge (R9) pour l'agencement à condensateurs accumulateurs (C5, C6) qui produit une décharge avec un temps de décharge cinq à dix fois plus long que le temps de charge de l'agencement à condensateurs (C5, C6).
  7. Appareil d'allumage selon la revendication 5 ou 6, caractérisé en ce qu'il comporte un chemin de décharge à faible valeur ohmique (D3) qui est relié au potentiel d'une alimentation à tension continue (GL), qui n'est pas le potentiel de référence pour la charge de l'agencement à condensateurs accumulateurs (C5, C6).
EP87109527A 1986-07-09 1987-07-02 Dispositif d'allumage pour lampes à décharge à haute pression Expired - Lifetime EP0252438B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109527T ATE62783T1 (de) 1986-07-09 1987-07-02 Zuendgeraet fuer hochdruckentladungslampen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863622984 DE3622984A1 (de) 1986-07-09 1986-07-09 Zuendgeraet fuer hochdruckentladungslampen
DE3622984 1986-07-09

Publications (2)

Publication Number Publication Date
EP0252438A1 EP0252438A1 (fr) 1988-01-13
EP0252438B1 true EP0252438B1 (fr) 1991-04-17

Family

ID=6304689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109527A Expired - Lifetime EP0252438B1 (fr) 1986-07-09 1987-07-02 Dispositif d'allumage pour lampes à décharge à haute pression

Country Status (3)

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EP (1) EP0252438B1 (fr)
AT (1) ATE62783T1 (fr)
DE (2) DE3622984A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890041A (en) * 1988-03-10 1989-12-26 Hubbell Incorporated High wattage HID lamp circuit
EP0337021A1 (fr) * 1988-04-12 1989-10-18 Actronic Lighting Cc Dispositif d'allumage pour une lampe à décharge
US5036256A (en) * 1990-06-21 1991-07-30 Gte Products Corporation Arc discharge ballast suitable for automotive applications
US5574338A (en) * 1995-06-07 1996-11-12 Nicollet Technologies Corporation Control circuit for gas discharge lamps, which has a transformer with start and run windings
EP0759684A1 (fr) 1995-08-21 1997-02-26 Siemens Aktiengesellschaft Amorceur pour une lampe à décharge haute-pression
DE10330013A1 (de) * 2003-07-03 2005-02-03 Elektrobau Oschatz Gmbh & Co. Kg Zündgerät mit intelligenter Abschaltung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1192741B (de) * 1963-02-23 1965-05-13 Siemens Ag Schaltungsanordnung zum Zuenden von Hochdruckgasentladungslampen
DE2730447C2 (de) * 1977-07-06 1983-05-11 Walter Bauch GmbH, 1000 Berlin Zünd- und Betriebsgerät für Entladungslampen
DE2938529C2 (de) * 1979-09-24 1981-10-15 Siemens AG, 1000 Berlin und 8000 München Zünd- und Betriebsgerät für eine Hochdrucklampe
US4356433A (en) * 1980-07-07 1982-10-26 The Nuarc Company, Inc. HID Lamp power supply
DE3331780A1 (de) * 1983-09-02 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum zuenden und betreiben einer entladungslampe

Also Published As

Publication number Publication date
DE3622984A1 (de) 1988-01-21
EP0252438A1 (fr) 1988-01-13
DE3622984C2 (fr) 1989-12-07
DE3769382D1 (de) 1991-05-23
ATE62783T1 (de) 1991-05-15

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