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EP0866647A2 - Circuit for operating a high pressure discharge lamp with a starting period shunting mode - Google Patents

Circuit for operating a high pressure discharge lamp with a starting period shunting mode Download PDF

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Publication number
EP0866647A2
EP0866647A2 EP98103765A EP98103765A EP0866647A2 EP 0866647 A2 EP0866647 A2 EP 0866647A2 EP 98103765 A EP98103765 A EP 98103765A EP 98103765 A EP98103765 A EP 98103765A EP 0866647 A2 EP0866647 A2 EP 0866647A2
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EP
European Patent Office
Prior art keywords
circuit
lamp
discharge lamp
high pressure
gas discharge
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
EP98103765A
Other languages
German (de)
French (fr)
Other versions
EP0866647B1 (en
EP0866647A3 (en
Inventor
Markus Häderle
Josef Osterried
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
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Publication of EP0866647A2 publication Critical patent/EP0866647A2/en
Publication of EP0866647A3 publication Critical patent/EP0866647A3/en
Application granted granted Critical
Publication of EP0866647B1 publication Critical patent/EP0866647B1/en
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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
    • 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
    • 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
    • H05B41/46—Circuits providing for substitution in case of failure of the lamp
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/29—Circuits providing for substitution of the light source in case of its failure
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps

Definitions

  • the invention relates to an operating circuit for a high-pressure gas discharge lamp.
  • a particular problem with high pressure gas discharge lamps is that they are usually only ignited when cold can, so only after a certain cooling phase after the last operation.
  • a much simpler alternative is to provide a second lamp generally a simple incandescent lamp that Can bridge the dark phase.
  • the aim is that the operating circuit the high pressure gas discharge lamp this light bulb independently turns on when an operator turns on the high pressure discharge lamp want to turn on, but this can not be ignited.
  • Conventional for this purpose quite elaborate electronics were provided to measure the voltage drop detected on the high pressure gas discharge lamp to the burning state closes and turns on the light bulb if necessary.
  • An example is the ignition timing bypass device Tridonic LRM 300. This device contains estimated between 50 and 80 electronic components and stressed a volume of about 70 x 40 x 30 mm, each for the ignition timing bypass function. This technical effort and the associated costs and size are considered to be very disadvantageous.
  • the invention is therefore based on the technical problem of an operating circuit for a high pressure gas discharge lamp to create a Ignition time bridging function enabled in a technically simple manner.
  • a circuit for operating a high-pressure gas discharge lamp with a device for bridging the ignition time by switching on a second lamp in which the ignition timing bypass device by an operating state of the high-pressure discharge lamp indicating signal is driven characterized in that the drive signal is an output signal of a power regulator of the circuit is.
  • the operating circuit therefore has a power regulator, whose output signal contains information about the burning state of the High pressure gas discharge lamp supplies. It should be noted that High pressure gas discharge lamps show a thermal increase in power and therefore in newer operating circuits, power regulators for power control anyway the high pressure gas discharge lamp are provided.
  • the output signal of the controller also does not necessarily have to be the ultimate control variable.
  • a pulse width modulator control a circuit breaker, e.g. in a direct current / direct current converter operated.
  • the controller output signal also has the advantage that a separate one Reference variable comparison device for determining the burning state can be omitted. A comparison is made anyway in the power controller already made.
  • the characteristics of the power regulator downward in the event of deviations in the lamp power which are so large that they do not occur in continuous operation digital " that means that in such cases the output signal leaves a range of values, in which continuous fluctuations are regulated, and through an intermediate interval that is only run for a relatively short time (eg controller integration time) to another range of values or to a fixed one other value (e.g. mass potential) is changed.
  • a relatively short time e.g controller integration time
  • a fixed one other value e.g. mass potential
  • Such a controller characteristic therefore leads to the fastest and most direct possible possible when the high-pressure gas discharge lamp is switched on by means of the latter range of values or value Start up "to the target performance, shortly before reaching this target performance in the value range of continuous operation to tilt "and carry out the fine control in continuous operation in this area.
  • This control characteristic leads, with the output signal deviating from the continuous operation, to a variable which can be used directly for controlling a simple driver circuit or a simple circuit breaker of the ignition time bridging device. This results in the additional effort required for the ignition time bridging function limited to a minimum.
  • the ignition time bridging device to be triggered with the described control signal can then be carried out according to the invention in various ways be.
  • it is a transistor or Thyristor switch in a supply line of the second lamp. Since there generally only rectified currents can be switched the supply for the second lamp advantageously in the same direction Tapped area of the power supply of the high pressure gas discharge lamp. However, it can also be tapped in the AC range and then go through a separate rectifier.
  • the power supply of the high pressure gas discharge lamp on the one hand and the output area of the controller can also be an electrical one Separation within the ignition bridging device makes sense be. Accordingly, a relay switch or an optocoupler can be used find, the latter in turn a non-separating switching element controls, e.g. a TRIAC, if the supply is not rectified the second lamp.
  • a relay switch or an optocoupler can be used find, the latter in turn a non-separating switching element controls, e.g. a TRIAC, if the supply is not rectified the second lamp.
  • Fig. 1 shows a schematic overview of the structure of an operating circuit according to the invention.
  • a circuit section extends from a conventional AC power supply with phase conductor L, normal conductor N and protective conductor SL via a radio interference suppression FE, a rectifier GR, an active harmonic filter OWF, to which an electrolytic capacitor C is arranged, via a power-controlled direct current / DC / DC-W DC converter, a DC / AC-W DC / AC converter and an igniter ZG to a high-pressure gas discharge lamp labeled HID.
  • a voltage U and current I are tapped multiplied to an actual power P and with a predetermined reference value P SOLL compared.
  • the difference forms the input signal of a controller R.
  • Its output signal S is fed to a pulse width modulator PWM, which drives a power transistor as a switching element in the DC / DC converter.
  • PWM pulse width modulator
  • the output signal S of the regulator R is applied as information about the burning state of the lamp to an ignition time bridging device ZZÜ, which is explained in more detail below and which controls the power supply of an incandescent lamp GL serving as a second lamp.
  • the illustration shows that the control signal S outside the direct Circuit section between the power supply L, N, SL top left and the high-pressure gas discharge lamp HID is tapped at the top right. Rather, it comes from the power controller R, which in the present case Output power of the DC / DC converter regulates. This happens through the Pulse width modulator PWM and that indicated in the DC / DC converter Switching transistor T.
  • Tapping the power P IST detected by the power controller R before the DC / DC converter has the advantage of a very low-loss determination because of the high input voltage and the low input current of the converter. Its power loss is known and can accordingly be taken into account when determining the reference variable P SET .
  • the output signal S of the power controller R is a zero potential, that is to say an output signal corresponding to its ground potential, if the detected power P ACTUAL is significantly smaller than the reference variable P SET .
  • P IST comes close to the value of P SOLL
  • the output signal S jumps to a value above 50% of the maximum value of its voltage supply within a relatively short integration time of a few 10 ms. In the value range above this 50%, the fine control takes place in the continuous operation of the high-pressure gas discharge lamp HID.
  • the value zero of the control signal S thus corresponds to the information Lamp does not burn "for the ignition bridging device ZZÜ, which accordingly releases the power supply for the incandescent lamp GL.
  • the ignition lock-up device consists here of a between the incandescent lamp GL and ground Switching element or transistor Tr.
  • the control signal S controls this Gate of the switching transistor Tr on.
  • the other side of the incandescent lamp GL is over a fuse F with the rectified phase line between the Rectifier GR and the ballast VG connected.
  • Fig. 2 embodies thus a particularly simple embodiment of the ignition time bridging device ZZÜ.
  • Fig. 3 in which the switching element by a Thyristor switch Th is embodied. Furthermore, here is the other side of the Incandescent lamp GL connected to the output of a separate rectifier GR ', its input with the power supply between the radio interference suppression FE and the rectifier of the high pressure gas discharge lamp supply GR is connected.
  • the connections of the incandescent lamp GL are already on the power supply side before the radio interference suppression FE.
  • One of the connections is through one Relay switch X interrupted, as drawn with the help of a bipolar transistor B, on the basis of which the drive signal S is actuated.
  • This circuit has the advantage of galvanic isolation between the Incandescent lamp circuit and the control signal S.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

The circuit for operating a high-pressure gas discharge lamp (HID) has a device (ZZ+E,uml U+EE ) for ignition-time bridging by switching in a second lamp (GL), the ignition-time bridging device (ZZ+E,uml U+EE ) being driven by a signal (S) indicating the operating state of the high-pressure discharge lamp (HID), and the drive signal (S) being an output signal of a power controller (R) of the circuit.

Description

Die Erfindung betrifft eine Betriebsschaltung für eine Hochdruckgasentladungslampe. Ein besonderes Problem von Hochdruckgasentladungslampen besteht darin, daß sie gewöhnlich nur in kalten Zustand gezündet werden können, also erst nach einer gewissen Abkühlphase nach dem letzten Betrieb.The invention relates to an operating circuit for a high-pressure gas discharge lamp. A particular problem with high pressure gas discharge lamps is that they are usually only ignited when cold can, so only after a certain cooling phase after the last operation.

Der Nachteil der Nichteinsetzbarkeit der Lampe während dieses Zeitraums, der etwa 2 bis 10 min in Anspruch nehmen kann, hat zur Entwicklung von speziellen Heißzündgeräten für Hochdruckgasentladungslampen geführt. Einer allgemeinen Anwendung dieser Heißzündgeräte stehen jedoch der mit ihnen verbundene erhebliche technische Aufwand und die dadurch bedingten Kosten im Wege.The disadvantage of the lamp not being usable during this period, which can take about 2 to 10 minutes to develop special hot igniters for high pressure gas discharge lamps. A general application of these hot igniters is however with considerable technical effort associated with them and the resulting Costs in the way.

Eine wesentlich einfachere Alternative besteht darin, eine zweite Lampe vorzusehen, im allgemeinen eine einfache Glühlampe, die die Abkühl- bzw. Dunkelphase überbrücken kann. Natürlich wird angestrebt, daß die Betriebsschaltung der Hochdruckgasentladungslampe diese Glühlampe selbständig einschaltet, wenn eine Bedienperson die Hochdruckentladungslampe einschalten möchte, diese jedoch nicht gezündet werden kann. Konventionell wurde dazu eine recht aufwendige Elektronik vorgesehen, die den Spannungsabfall an der Hochdruckgasentladungslampe erfaßt, auf den Brennzustand rückschließt und bei Bedarf die Glühlampe einschaltet. Ein Beispiel ist das Zündzeitüberbrückungsgerät Tridonic LRM 300. Dieses Gerät enthält schätzungsweise zwischen 50 und 80 elektronische Bauteile und beansprucht ein Volumen von etwa 70 x 40 x 30 mm, und zwar jeweils ausschließlich für die Zündzeitüberbrückungsfunktion. Dieser technische Aufwand und die damit verbundenen Kosten und Baugröße werden als sehr nachteilhaft angesehen.A much simpler alternative is to provide a second lamp generally a simple incandescent lamp that Can bridge the dark phase. Of course, the aim is that the operating circuit the high pressure gas discharge lamp this light bulb independently turns on when an operator turns on the high pressure discharge lamp want to turn on, but this can not be ignited. Conventional For this purpose, quite elaborate electronics were provided to measure the voltage drop detected on the high pressure gas discharge lamp to the burning state closes and turns on the light bulb if necessary. An example is the ignition timing bypass device Tridonic LRM 300. This device contains estimated between 50 and 80 electronic components and stressed a volume of about 70 x 40 x 30 mm, each for the ignition timing bypass function. This technical effort and the associated costs and size are considered to be very disadvantageous.

Der Erfindung liegt somit das technische Problem zugrunde, eine Betriebsschaltung für eine Hochdruckgasentladungslampe zu schaffen, die eine Zündzeitüberbrückungsfunktion in technisch einfacher Weise ermöglicht.The invention is therefore based on the technical problem of an operating circuit for a high pressure gas discharge lamp to create a Ignition time bridging function enabled in a technically simple manner.

Dieses Problem wird gelöst durch eine Schaltung zum Betrieb einer Hochdruckgasentladungslampe mit einer Einrichtung zur Zündzeitüberbrückung durch Einschalten einer zweiten Lampe, bei der die Zündzeitüberbrückungseinrichtung durch ein den Betriebszustand der Hochdruckentladungslampe anzeigendes Signal angesteuert wird, dadurch gekennzeichnet, daß das Ansteuersignal ein Ausgangssignal eines Leistungsreglers der Schaltung ist.This problem is solved by a circuit for operating a high-pressure gas discharge lamp with a device for bridging the ignition time by switching on a second lamp in which the ignition timing bypass device by an operating state of the high-pressure discharge lamp indicating signal is driven, characterized in that the drive signal is an output signal of a power regulator of the circuit is.

Weitere erfindungsgemäße Ausgestaltungen sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

Erfindungsgemäß verfügt die Betriebsschaltung also über einen Leistungsregler, dessen Ausgangssignal die Information über den Brennzustand der Hochdruckgasentladungslampe liefert. Dabei ist zu berücksichtigen, daß Hochdruckgasentladungslampen eine thermische Leistungszunahme zeigen, und daher bei neueren Betriebsschaltungen ohnehin Leistungsregler zur Leistungsregelung der Hochdruckgasentladungslampe vorgesehen sind.According to the invention, the operating circuit therefore has a power regulator, whose output signal contains information about the burning state of the High pressure gas discharge lamp supplies. It should be noted that High pressure gas discharge lamps show a thermal increase in power and therefore in newer operating circuits, power regulators for power control anyway the high pressure gas discharge lamp are provided.

Durch diesen Leistungsregler bzw. das Ausnutzen seines Ausgangssignals als Informationsquelle über den Brennzustand der Lampe ergibt sich eine einfache und technisch in verschiedener Hinsicht vorteilhafte Möglichkeit der Ansteuerung einer Zündzeitüberbrückungseinrichtung. Zunächst stellt es sich als vorteilhaft heraus, daß das den Brennzustand der Hochdruckgasentladungslampe anzeigende Signal nicht wie im konventionellen Fall in der Schaltungsstrecke zwischen Leistungsversorgung und der Hochdruckgasentladungslampe, sondern außerhalb davon abgegriffen wird. Zum einen ist der Abgriff in dieser Schaltungsstrecke generell relativ verlustbehaftet und verschlechtert den Wirkungsgrad der Betriebsschaltung. Zum zweiten führt ein Abgriff in der Schaltungsstrecke an vielen Stellen zu Wechselstrom- oder Wechselspannungssignalen, die zunächst gleichgerichtet werden müßten. Weiterhin müßte die Zündzeitüberbrückungseinrichtung - wiederum je nach genauer Abgriffsstelle in der genannten Schaltungsstrecke - hinsichtlich der dort auftretenden Zündpulse im Strom oder in der Spannung ausgelegt sein.Through this power controller or by using its output signal there is a source of information about the burning state of the lamp simple and technically advantageous option in various respects the control of an ignition time bridging device. First, poses it turns out to be advantageous that the burning state of the high pressure gas discharge lamp indicating signal not in the conventional case in the circuit section between the power supply and the high pressure gas discharge lamp, but is tapped outside of it. On the one hand the tap in this circuit section is generally relatively lossy and deteriorates the efficiency of the operating circuit. Second a tap in the circuit section leads to AC or in many places AC signals that would first have to be rectified. Furthermore, the ignition timing bridging device would have to - again after a precise tap in the circuit section mentioned - with regard to of the ignition pulses occurring there in the current or in the voltage be.

Im übrigen ist der Begriff

Figure 00030001
Leistungsregler" in dieser Anmeldung so zu verstehen, daß letztendlich für eine weitgehend konstante Lampenleistung der Hochdruckgasentladungslampe im Dauerbetrieb gesorgt wird. Damit sind natürlich auch die Fälle umfaßt, in denen ein Strom oder eine Spannung in der Betriebsschaltung die eigentlich geregelte Größe ist, womit dennoch der gleiche Zweck der Leistungssteuerung verfolgt wird.Otherwise, the term
Figure 00030001
Power Regulator "in this application is to be understood in such a way that ultimately a largely constant lamp output of the high-pressure gas discharge lamp is ensured in continuous operation. Of course, this also includes the cases in which a current or a voltage in the operating circuit is the actually controlled variable, which nevertheless means that same purpose of performance control is pursued.

Das Ausgangssignal des Reglers muß außerdem nicht zwangsläufig die letztliche Stellgröße sein. Es kann z.B. zunächst einen Pulsweitenmodulator ansteuern, der einen Leistungsschalter, z.B. in einem Gleichstrom/Gleichstrom-Wandler betätigt.The output signal of the controller also does not necessarily have to be the ultimate control variable. For example, first a pulse width modulator control a circuit breaker, e.g. in a direct current / direct current converter operated.

Das Reglerausgangssignal hat in vielen Fällen auch den Vorteil, daß eine gesonderte Bezugsgrößen-Vergleichseinrichtung zur Ermittlung des Brennzustandes entfallen kann. Ein Vergleich wird nämlich im Leistungsregler ohnehin bereits vorgenommen.In many cases, the controller output signal also has the advantage that a separate one Reference variable comparison device for determining the burning state can be omitted. A comparison is made anyway in the power controller already made.

Vorteile ergeben sich insbesondere für die Fälle, in denen die im Dauerbetrieb der Hochdruckgasentladungslampe auftretenden Reglerausgangssignale zu klein sind oder zu wenig vom Reglerausgangssignal bei erfaßtem Sollwert abweichen, um die angesteuerte Zündüberbrückungseinrichtung auszulösen.Advantages arise in particular for those cases in which the continuous operation the high-pressure gas discharge lamp controller output signals are too small or too little of the controller output signal when detected Setpoint deviate to the activated ignition lock-up device trigger.

Nach einer erfindungsgemäßen Ausgestaltung kann insbesondere vorgesehen sein, daß sich die Charakteristik des Leistungsreglers bei Abweichungen der Lampenleistung nach unten, die so groß sind, daß sie im Dauerbetrieb nicht auftreten, quasi digital" verhält. Das heißt, daß das Ausgangssignal in solchen Fällen einen Wertebereich, in dem im Dauerbetrieb bezüglich kleiner Fluktuationen geregelt wird, verläßt und durch ein nur für eine relativ kurze Zeit (z.B. Reglerintegrationszeit) durchfahrenes Zwischenintervall in einen anderen Wertebereich oder zu einem festen anderen Wert (z.B. Massenpotential) verändert wird.According to an embodiment of the invention, it can in particular be provided that the characteristics of the power regulator downward in the event of deviations in the lamp power which are so large that they do not occur in continuous operation digital ". That means that in such cases the output signal leaves a range of values, in which continuous fluctuations are regulated, and through an intermediate interval that is only run for a relatively short time (eg controller integration time) to another range of values or to a fixed one other value (e.g. mass potential) is changed.

Eine solche Reglercharakteristik führt also beim Einschalten der Hochdruckgasentladungslampe durch den letztgenannten Wertebereich bzw. Wert zu einem möglichst schnellen und direkten Hochfahren" zu der Solleistung, um kurz vor Erreichen dieser Solleistung in den Wertebereich des Dauerbetriebs zu kippen" und die Feinregelung im Dauerbetrieb in diesem Bereich durchzuführen. Diese Regelcharakteristik führt mit dem vom Dauerbetrieb abweichenden Ausgangssignal zu einer direkt für die Ansteuerung einer einfachen Treiberschaltung oder eines einfachen Leistungsschalters der Zündzeitüberbrückungseinrichtung verwendbaren Größe. Damit wird der für die Zündzeitüberbrückungsfunktion erforderliche zusätzliche Aufwand auf ein Minimum beschränkt. Such a controller characteristic therefore leads to the fastest and most direct possible possible when the high-pressure gas discharge lamp is switched on by means of the latter range of values or value Start up "to the target performance, shortly before reaching this target performance in the value range of continuous operation to tilt "and carry out the fine control in continuous operation in this area. This control characteristic leads, with the output signal deviating from the continuous operation, to a variable which can be used directly for controlling a simple driver circuit or a simple circuit breaker of the ignition time bridging device. This results in the additional effort required for the ignition time bridging function limited to a minimum.

Die mit dem beschriebenen Ansteuersignal auszulösende Zündzeitüberbrückungseinrichtung kann dann erfindungsgemäß in verschiedener Weise ausgeführt sein. Im einfachsten Fall handelt es sich um einen Transistor- oder Thyristorschalter in einer Versorgungsleitung der zweiten Lampe. Da dabei im allgemeinen nur gleichgerichtete Ströme geschaltet werden können, wird die Versorgung für die zweite Lampe vorteilhafterweise im gleichgerichteten Bereich der Leistungsversorgung der Hochdruckgasentladungslampe abgegriffen. Sie kann jedoch auch im Wechselstrombereich abgegriffen werden und dann einen separaten Gleichrichter durchlaufen.The ignition time bridging device to be triggered with the described control signal can then be carried out according to the invention in various ways be. In the simplest case, it is a transistor or Thyristor switch in a supply line of the second lamp. Since there generally only rectified currents can be switched the supply for the second lamp advantageously in the same direction Tapped area of the power supply of the high pressure gas discharge lamp. However, it can also be tapped in the AC range and then go through a separate rectifier.

Vor allem im Hinblick auf unterschiedliche Massebezugspotentiale im Bereich der Leistungsversorgung der Hochdruckgasentladungslampe einerseits und dem Ausgangsbereich des Reglers andererseits kann ferner eine elektrische Trennung innerhalb der Zündzeitüberbrückungseinrichtung sinnvoll sein. Dementsprechend kann ein Relaisschalter oder ein Optokoppler Verwendung finden, wobei letzterer ein seinerseits nicht trennendes Schaltelement ansteuert, z.B. einen TRIAC, bei einer nicht gleichgerichteten Versorgung der zweiten Lampe.Especially with regard to different ground reference potentials in the area the power supply of the high pressure gas discharge lamp on the one hand and the output area of the controller, on the other hand, can also be an electrical one Separation within the ignition bridging device makes sense be. Accordingly, a relay switch or an optocoupler can be used find, the latter in turn a non-separating switching element controls, e.g. a TRIAC, if the supply is not rectified the second lamp.

Im folgenden wird die Erfindung anhand mehrerer konkreter Ausführungsbeispiele in den Figuren erläutert. Die dabei offenbarten Merkmale können jedoch auch einzeln oder in anderen Kombinationen erfindungswesentlich sein.

Fig. 1
zeigt ein schematisches Blockschaltbild einer erfindungsgemäßen Betriebsschaltung; und die
Fig. 2 bis 5
zeigen jeweils eine Möglichkeit für eine Zündzeitüberbrückungseinrichtung.
The invention is explained in the following on the basis of several specific exemplary embodiments in the figures. However, the features disclosed here can also be essential to the invention individually or in other combinations.
Fig. 1
shows a schematic block diagram of an operating circuit according to the invention; and the
2 to 5
each show a possibility for an ignition time bridging device.

Fig. 1 zeigt einen schematischen Überblick über den Aufbau einer erfindungsgemäßen Betriebsschaltung. Im oberen Bereich erstreckt sich von links nach rechts eine Schaltungsstrecke von einer gewöhnlichen Wechselstromleistungsversorgung mit Phasenleiter L, Normalleiter N und Schutzleiter SL über eine Funktentstörung FE, einen Gleichrichter GR, ein aktives Oberwellenfilter OWF, dem ein Elektrolytkondensator C nachgeordnet ist, weiter über einen leistungsgeregelten Gleichstrom/Gleichstrom-Wandler DC/DC-W, einen Gleichstrom/Wechselstrom-Wandler DC /AC-W und ein Zündgerät ZG zu einer mit HID bezeichneten Hochdruckgasentladungslampe. Zwischen dem Oberwellenfilter OWF und dem DC/DC-Wandler werden eine Spannung U und ein Strom I abgegriffen, multipliziert zu einer Istleistung PIST und mit einem vorgegebenen Bezugswert PSOLL verglichen. Die Differenz bildet das Eingangssignal eines Reglers R. Dessen Ausgangssignal S wird einem Pulsweitenmodulator PWM zugeführt, der einen Leistungstransistor als Schaltelement in dem DC /DC-Wandler ansteuert. Das Ausgangssignal S des Reglers R wird als Information über den Brennzustand der Lampe an eine im folgenden näher erläuterte Zündzeitüberbrückungseinrichtung ZZÜ angelegt, die die Leistungsversorgung einer als zweite Lampe dienenden Glühlampe GL steuert.Fig. 1 shows a schematic overview of the structure of an operating circuit according to the invention. In the upper area, from left to right, a circuit section extends from a conventional AC power supply with phase conductor L, normal conductor N and protective conductor SL via a radio interference suppression FE, a rectifier GR, an active harmonic filter OWF, to which an electrolytic capacitor C is arranged, via a power-controlled direct current / DC / DC-W DC converter, a DC / AC-W DC / AC converter and an igniter ZG to a high-pressure gas discharge lamp labeled HID. Between the harmonic filter OWF and the DC / DC converter, a voltage U and current I are tapped multiplied to an actual power P and with a predetermined reference value P SOLL compared. The difference forms the input signal of a controller R. Its output signal S is fed to a pulse width modulator PWM, which drives a power transistor as a switching element in the DC / DC converter. The output signal S of the regulator R is applied as information about the burning state of the lamp to an ignition time bridging device ZZÜ, which is explained in more detail below and which controls the power supply of an incandescent lamp GL serving as a second lamp.

Die Darstellung verdeutlicht, daß das Ansteuersignal S außerhalb der direkten Schaltungsstrecke zwischen der Leistungsversorgung L, N, SL links oben und der Hochdruckgasentladungslampe HID rechts oben abgegriffen wird. Es stammt vielmehr aus dem Leistungsregler R, der im vorliegenden Fall die Ausgangsleistung des DC/DC-Wandlers regelt. Dies geschieht durch den Pulsweitenmodulator PWM und den in dem DC/DC-Wandler angedeuteten Schalttransistor T.The illustration shows that the control signal S outside the direct Circuit section between the power supply L, N, SL top left and the high-pressure gas discharge lamp HID is tapped at the top right. Rather, it comes from the power controller R, which in the present case Output power of the DC / DC converter regulates. This happens through the Pulse width modulator PWM and that indicated in the DC / DC converter Switching transistor T.

Der Abgriff der von dem Leistungsregler R erfaßten Leistung PIST vor dem DC/DC-Wandler hat wegen der hohen Eingangsspannung und dem geringen Eingangstrom des Wandlers den Vorteil einer sehr verlustarmen Ermittlung. Seine Verlustleistung ist bekannt und kann dementsprechend bei der Festlegung der Bezugsgröße PSOLL berücksichtigt werden.Tapping the power P IST detected by the power controller R before the DC / DC converter has the advantage of a very low-loss determination because of the high input voltage and the low input current of the converter. Its power loss is known and can accordingly be taken into account when determining the reference variable P SET .

Das Ausgangssignal S des Leistungsreglers R ist ein Nullpotential, d.h. ein seinem Massepotential entsprechendes Ausgangssignal, wenn die erfaßte Leistung PIST deutlich kleiner als die Bezugsgröße PSOLL ist. Sobald PIST in die Nähe des Werts von PSOLL kommt, springt das Ausgangssignal S innerhalb einer relativ kurzen Integrationszeit von einigen 10 ms auf einen Wert oberhalb von 50% des Maximalwerts seiner Spannungsversorgung. In dem Wertebereich oberhalb dieser 50% erfolgt die Feinregelung im Dauerbetrieb der Hochdruckgasentladungslampe HID.The output signal S of the power controller R is a zero potential, that is to say an output signal corresponding to its ground potential, if the detected power P ACTUAL is significantly smaller than the reference variable P SET . As soon as P IST comes close to the value of P SOLL , the output signal S jumps to a value above 50% of the maximum value of its voltage supply within a relatively short integration time of a few 10 ms. In the value range above this 50%, the fine control takes place in the continuous operation of the high-pressure gas discharge lamp HID.

Damit entspricht der Wert Null des Ansteuersignals S der Information Lampe brennt nicht" für die Zündzeitüberbrückungseinrichtung ZZÜ, die entsprechend die Leistungsversorgung für die Glühlampe GL freigibt.The value zero of the control signal S thus corresponds to the information Lamp does not burn "for the ignition bridging device ZZÜ, which accordingly releases the power supply for the incandescent lamp GL.

In Fig. 2 ist die Schaltungsstrecke zwischen der Leistungsversorgung L, N, SL und der Hochdruckgasentladungslampe HID wie in allen folgenden Figuren vereinfacht dargestellt, und zwar reduziert auf die Funkentstörung FE, den Gleichrichter GR, und die restlichen Schaltungselemente der Strecke zusammenfassend, das Vorschaltgerät VG. Die Zündzeitüberbrückungseinrichtung besteht hier aus einem zwischen die Glühlampe GL und Masse gelegten Schaltelement bzw. Transistor Tr. Das Ansteuersignal S steuert das Gate des Schalttransistors Tr an. Die andere Seite der Glühlampe GL ist über eine Sicherung F mit der gleichgerichteten Phasenleitung zwischen dem Gleichrichter GR und dem Vorschaltgerät VG verbunden. Fig. 2 verkörpert somit eine besonders einfache Ausführungsform der Zündzeitüberbrückungseinrichtung ZZÜ. 2 the circuit path between the power supply L, N, SL and the high pressure gas discharge lamp HID as in all the following figures shown in simplified form, and reduced to radio interference suppression FE, the rectifier GR, and the remaining circuit elements of the line in summary, the ballast VG. The ignition lock-up device consists here of a between the incandescent lamp GL and ground Switching element or transistor Tr. The control signal S controls this Gate of the switching transistor Tr on. The other side of the incandescent lamp GL is over a fuse F with the rectified phase line between the Rectifier GR and the ballast VG connected. Fig. 2 embodies thus a particularly simple embodiment of the ignition time bridging device ZZÜ.

Das gilt weitgehend auch für Fig. 3, bei der das Schaltelement durch einen Thyristorschalter Th verkörpert ist. Ferner ist hier die andere Seite der Glühlampe GL an den Ausgang eines separaten Gleichrichters GR' angeschlossen, dessen Eingang mit der Leistungsversorgung zwischen der Funktentstörung FE und dem Gleichrichter der Hochdruckgasentladungslampenversorgung GR verbunden ist.This also largely applies to Fig. 3, in which the switching element by a Thyristor switch Th is embodied. Furthermore, here is the other side of the Incandescent lamp GL connected to the output of a separate rectifier GR ', its input with the power supply between the radio interference suppression FE and the rectifier of the high pressure gas discharge lamp supply GR is connected.

In Fig. 4 liegen die Anschlüsse der Glühlampe GL bereits leistungsversorgungsseitig vor der Funkentstörung FE. Einer der Anschlüsse ist durch einen Relaisschalter X unterbrochen, der wie gezeichnet mit Hilfe eines Bipolartransistors B, an dessen Basis das Ansteuersignal S liegt, betätigt wird. Diese Schaltung hat den Vorteil einer galvanischen Trennung zwischen dem Glühlampenkreis und dem Ansteuersignal S.4, the connections of the incandescent lamp GL are already on the power supply side before the radio interference suppression FE. One of the connections is through one Relay switch X interrupted, as drawn with the help of a bipolar transistor B, on the basis of which the drive signal S is actuated. This circuit has the advantage of galvanic isolation between the Incandescent lamp circuit and the control signal S.

Dem entspricht weitgehend die in Fig. 5 gezeigte Ausführungsform der Zündzeitüberbrückungseinrichtung ZZÜ. Hier ist jedoch statt des Relais ein mit Q bezeichneter TRIAC als Schaltelement verwendet worden, der über einen Optokoppler O und einen Bipolartransistor B' angesteuert wird. Hier dient der Optokoppler O zur galvanischen Trennung.This largely corresponds to the embodiment shown in FIG Ignition time bridging device ZZÜ. Here, however, is instead of the relay TRIAC designated with Q has been used as a switching element which has a Optocoupler O and a bipolar transistor B 'is driven. Here the optocoupler O is used for electrical isolation.

Claims (5)

Schaltung zum Betrieb einer Hochdruckgasentladungslampe (HID) mit einer Einrichtung (ZZÜ) zur Zühdzeitüberbrückung durch Einschalten einer zweiten Lampe (GL), bei der die Zündzeitüberbrückungseinrichtung (ZZÜ) durch ein den Betriebszustand der Hochdruckgasentladungslampe (HID) anzeigendes Signal (S) angesteuert wird, dadurch gekennzeichnet, daß das Ansteuersignal (S) ein Ausgangssignal eines Leistungsreglers (R) der Schaltung ist.Circuit for operating a high pressure gas discharge lamp (HID) with a device (ZZÜ) for bridging the ignition time by switching on a second lamp (GL), in which the ignition bridging device (ZZÜ) by an operating state of the high pressure gas discharge lamp (HID) indicating signal (S) is driven thereby characterized in that the control signal (S) is an output signal of a Power regulator (R) of the circuit is. Schaltung nach Anspruch 1, bei der der Leistungsregler (R) eine Regelcharakteristik aufweist, die bei deutlich unter einem Leistungssollwert liegender Leistung der Hochdruckgasentladungslampe (HID) das Leistungsreglerausgangssignal (S) von einem Wertebereich der Dauerbetriebsregelung zu einem davon durch ein nur für kurze Zeit durchstrichenes Zwischenintervall getrennten Wertebereich oder Wert des Wiederstartens verändert.Circuit according to Claim 1, in which the power regulator (R) has a control characteristic which is at well below a power setpoint lying power of the high pressure gas discharge lamp (HID) Power controller output signal (S) from a range of values of continuous operation control to one of them by a streaked through for a short time only Interval separated value range or value of Restart changed. Schaltung nach Anspruch 1 oder 2, bei der das Ansteuersignal (S) an einen in einer Versorgungsleitung der zweiten Lampe (GL) liegenden Transistorschaltung (Tr) oder Thyristorschaltung (Th) angelegt ist.Circuit according to Claim 1 or 2, in which the drive signal (S) is on one in a supply line of the second lamp (GL) Transistor circuit (Tr) or thyristor circuit (Th) is created. Schaltung nach Anspruch 1 oder 2, bei der das Ansteuersignal (S) an einen in einer Versorgungsleitung der zweiten Lampe (GL) liegenden Relaisschalter (X) angelegt ist.Circuit according to Claim 1 or 2, in which the drive signal (S) is on one in a supply line of the second lamp (GL) Relay switch (X) is created. Schaltung nach Anspruch 1 oder 2, bei der das Ansteuersignal (S) mittels eines Optokopplers (O) ein In einer Versorgungsleitung der zweiten Lampe (GL) liegendes Schaltelement, etwa einen TRIAC (Q), ansteuert.Circuit according to claim 1 or 2, in which the control signal (S) by means of of an optocoupler (O) on In a supply line of the second Switching lamp (GL), such as a TRIAC (Q), controls.
EP98103765A 1997-03-21 1998-03-04 Circuit for operating a high pressure discharge lamp with a starting period shunting mode Expired - Lifetime EP0866647B1 (en)

Applications Claiming Priority (2)

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DE29705183U DE29705183U1 (en) 1997-03-21 1997-03-21 Operating circuit for high pressure gas discharge lamps with ignition time bridging function
DE29705183U 1997-03-21

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EP0866647A3 EP0866647A3 (en) 1998-12-02
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EP (1) EP0866647B1 (en)
JP (1) JPH10270188A (en)
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DE59800459D1 (en) 2001-03-15
US5917287A (en) 1999-06-29
CA2232901A1 (en) 1998-09-21
JPH10270188A (en) 1998-10-09
ATE199113T1 (en) 2001-02-15
EP0866647B1 (en) 2001-02-07
EP0866647A3 (en) 1998-12-02
CA2232901C (en) 2005-02-15
DE29705183U1 (en) 1997-05-15

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