EP2529597B1 - Method for operating a gas discharge lamp and gas discharge lamp system - Google Patents

Method for operating a gas discharge lamp and gas discharge lamp system Download PDF

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Publication number
EP2529597B1
EP2529597B1 EP11714761.1A EP11714761A EP2529597B1 EP 2529597 B1 EP2529597 B1 EP 2529597B1 EP 11714761 A EP11714761 A EP 11714761A EP 2529597 B1 EP2529597 B1 EP 2529597B1
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EP
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Prior art keywords
voltage
frequency
discharge lamp
ignition
gas discharge
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EP11714761.1A
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German (de)
French (fr)
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EP2529597A2 (en
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Michael Boenigk
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Osram GmbH
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Osram GmbH
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    • 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
    • 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

Definitions

  • the invention relates to a method for operating a gas discharge lamp, wherein the gas discharge lamp has a discharge vessel, in the cavity of which two electrodes protrude, and at least one Zündangeselement, wherein the electrodes during ignition, a high-frequency AC voltage is applied.
  • the invention also relates to a gas discharge lamp system having at least one gas discharge lamp and a control device for activating the at least one gas discharge lamp.
  • mercury-free discharge lamps is used to ignite them usually by means of a ballast pulse ignition with the ignition parameters dU / dt> 70 kV / ⁇ s and a voltage of more 20 kV.
  • Mercury-free discharge lamps with capacitive starting aid ignite at these pulse parameters at an ignition voltage of about 16 kV, resulting in practice high scattering both between the lamps and the ignitions of the individual lamps.
  • the ignition voltages can far exceed the ignition pulse provided by the ballast. This can lead both to an increased reject rate during production of the discharge lamps and to a poor ignition behavior of the system of discharge lamp and ballast.
  • the high voltages of the ignition pulse require a great deal of technical effort and thus high costs for the system.
  • WO 01/73817 A1 describes a gas discharge lamp having a burner having a discharge vessel with a cavity in which a filling with gas and other substances is arranged. In the cavity protrude two electrodes, between which an arc is formed during operation of the gas discharge lamp. On the outside of the discharge vessel, two auxiliary electrodes of opposite polarity are arranged opposite one another in the region of the cavity. The auxiliary electrodes are formed by coating the outside of the discharge vessel with electrically conductive material. Before and possibly also during the ignition of the gas discharge lamp, high frequency high voltage is applied to the auxiliary electrodes, whereby the ignition of the gas discharge lamp is facilitated.
  • WO 2004/090934 A1 describes a high pressure discharge lamp comprising a light bulb extending from one side of a lighting unit having a discharge space therein and a pair of sealing units passing through this lighting unit and a pair of electrodes disposed in the discharge space of the lighting unit, wherein a part of an environmental conductor in a specific area of an arc tube is wound on a sealing unit in a nearly spiral shape, and the remaining part of the environmental conductor is over protrudes the outer part of an arc tube, which is to be electrically connected to an electrode on the other sealing unit side.
  • the breakdown voltage can be controlled up to 8 kV.
  • WO 2006/064408 A1 describes a high frequency lamp circuit for a gas discharge lamp, wherein the lamp circuit comprises a series connection of an AC supply source for supplying an AC voltage, having a high lamp operating frequency, a ballast inductor, a capacitor and connections for connection to a gas discharge lamp and, connected to the terminals, an ignition circuit for igniting the lamp ,
  • the capacitor has a value representing a low impedance for the lamp operating frequency.
  • the ignition circuit has a series arrangement of an impedance and a DC voltage source for supplying a high DC voltage.
  • the series impedance of the ignition circuit has a value which is high with respect to an impedance value of the lamp during start-up and during continuous operation of the lamp DE10233400A1 discloses a known method of the prior art.
  • the DE102006010803A1 discloses a discharge lamp with a capacitive Zündangeselement.
  • the object is achieved by a method for operating a gas discharge lamp, wherein the gas discharge lamp has a discharge vessel, in the cavity of which two electrodes protrude, and at least one Zündangeselement, wherein the electrodes during ignition of the gas discharge lamp with a high-frequency alternating voltage superimposed DC voltage is applied.
  • This embodiment allows a significant reduction of the required ignition voltage in comparison to a use of an ignition pulse.
  • the combination of the DC voltage and the high-frequency AC voltage with a lower amplitude of the high-frequency voltage can be realized than with an exclusively high-frequency ignition, whereby simpler and less expensive ballasts, in particular electronic ballasts (ECG), can be used.
  • ECG electronic ballasts
  • Another advantage is that only a lower ionization of the live parts of the installation (base, leads, etc.) occurs.
  • the dielectric strength of the corresponding components can be chosen to be lower than in the exclusively high-frequency ignition.
  • the scattering of the individual ignitions of a lamp as well as the scattering of the lamps among each other also decrease.
  • the capacitive ignition aid acts on at least one electrode protruding into the discharge vessel.
  • the DC voltage is increased in its magnitude ramp-like, in particular approximately linear, over time.
  • the DC voltage may be e.g. be applied directly to the desired voltage level.
  • the DC voltage ramp is traversed within about 1 s, in particular within about 500 ms.
  • the DC voltage up to a magnitude voltage level of max. 8 kV, in particular max. 7 kV, is set.
  • the high-frequency AC voltage has a peak amplitude between 3 kV and 6 kV, in particular between 4 kV and 5 kV.
  • the high-frequency AC voltage has a frequency between 100 kHz and 4 MHz.
  • the high-frequency AC voltage has a frequency between 100 kHz and 400 kHz, in particular between 150 kHz and 300 kHz, which facilitates a design of the high-frequency components and allows use of cheaper components.
  • the high frequency AC voltage may be e.g. have a frequency from about 1 MHz, in particular between about 1 MHz and about 4 MHz, whereby an effectiveness of the energy input can be increased.
  • the discharge vessel has a mercury-free filling (mercury-free discharge lamp).
  • the at least one capacitive starting aid can be, for example, an auxiliary starting layer, an auxiliary starting wire, a charged one Contusion, a return conductor, a reflector surrounding the discharge vessel or the like. include.
  • the at least one starting aid can be galvanically coupled to one of the two lamp contacts or constructed without galvanic contacting with one of the two lamp contacts (floating in terms of potential).
  • the high-frequency AC voltage or the proportion of high-frequency AC voltage is equal to or greater than the voltage required for a takeover of the lamp.
  • a gas discharge lamp system having at least one gas discharge lamp and a control device for activating the at least one gas discharge lamp, the at least one gas discharge lamp having a discharge vessel, in the cavity of which two electrodes protrude, and at least one auxiliary starting element, and the control device is set up to to apply to the electrodes of the respective gas discharge lamps superimposed with a high-frequency AC voltage DC voltage.
  • Fig.1 shows a gas discharge lamp 1 with a discharge vessel 2, in the cavity 3, two electrodes 4a, 4b and the cavity 3 is filled with a mercury-free steam filling.
  • a capacitive Zündangeselement (“capacitive ignition aid”) 5 is present.
  • the Zündangeselement 5 forms here to each of the electrodes 4a, 4b towards a capacity which is up or reloaded with each half-wave of a high-frequency alternating voltage.
  • an alternating electric field is formed in the cavity 3, which causes a dielectrically impeded discharge of gas atoms or gas molecules present in the cavity 3.
  • This discharge generates charge carriers for a complete ignition of the gas discharge lamp 1 via the electrodes 4a, 4b.
  • the Zündoselement 5 can at least one Zündanges Mrs, Zündosdraht, coated pinch, return conductors o.ä. include.
  • the Zündoselement 5 can basically form a capacitance with two electrodes 4a, 4b or only one of the electrodes 4a, 4b.
  • two Zündoside 5, each with an electrode 4a, 4b form a capacity.
  • the ignition is controlled by an electronic ballast 6, which here for the ignition of the gas discharge lamp 1 here to the two electrodes 4a, 4b a combination of a DC voltage and a high frequency AC voltage ('high frequency voltage') applies, as in more detail Fig.2 explained.
  • Fig.2 shows a plot of a voltage applied by means of the electronic ballast 6 to the electrodes 4a, 4b of the discharge lamp 1 voltage U in the form of a combination of a (here negatively applied) DC voltage and a high frequency AC voltage in kV on the ordinate or y-axis over time t in ms on the abscissa or x-axis.
  • Figure 3 shows a frequency distribution of a number N of similar discharge lamps on the ordinate distributed over the required for the respective discharge lamp ignition voltage Uz in kV on the abscissa, both for ignition by means of an ignition pulse P and alternatively for ignition by means of the combination K from the DC voltage and the high-frequency AC voltage.
  • the breakdown voltage or ignition voltage of the discharge lamps is indicated on ignition on a first rising edge of the ignition pulse P. Ignitions outside the first rising edge of the ignition pulse P (eg on a falling edge or during a following half-wave) are indicated by the dotted marked termination of the distribution at about 18.5 kV.
  • the distribution maximum for the combination K from the DC voltage and the high-frequency AC voltage is only between about 9 kV and 10 kV,
  • the scattering or standard deviation of the distribution for the combination K is narrower than for the Pulse-type ignition, which allows a simpler design of the ballast and / or a lower rejects.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Description

Die Erfindung betrifft Verfahren zum Betreiben einer Gasentladungslampe, wobei die Gasentladungslampe ein Entladungsgefäß, in dessen Hohlraum zwei Elektroden ragen, sowie mindestens ein Zündhilfselement aufweist, wobei an die Elektroden während eines Zündens eine hochfrequente Wechselspannung angelegt wird. Die Erfindung betrifft auch ein Gasentladungslampensystem mit mindestens einer Gasentladungslampe und einem Steuergerät zum Ansteuern der mindestens einen Gasentladungslampe.The invention relates to a method for operating a gas discharge lamp, wherein the gas discharge lamp has a discharge vessel, in the cavity of which two electrodes protrude, and at least one Zündhilfselement, wherein the electrodes during ignition, a high-frequency AC voltage is applied. The invention also relates to a gas discharge lamp system having at least one gas discharge lamp and a control device for activating the at least one gas discharge lamp.

Für quecksilberfreie Entladungslampen wird zu deren Zündung in der Regel mittels eines Vorschaltgeräts eine Impulszündung mit den Zündparametern dU/dt > 70 kV/µs und einer Spannung von mehr 20 kV verwendet. Quecksilberfreie Entladungslampen mit kapazitiver Zündhilfe zünden bei diesen Impulsparametern bei einer Zündspannung von ca. 16 kV, wobei sich in der Praxis hohe Streuungen sowohl zwischen den Lampen als auch bei den Zündungen der einzelnen Lampen ergeben. So können die Zündspannungen den von dem Vorschaltgerät bereitgestellten Zündimpuls weit überschreiten. Dies kann sowohl zu einer erhöhten Ausschussrate während einer Fertigung der Entladungslampen als auch zu einem schlechten Zündverhalten des Systems aus Entladungslampe und Vorschaltgerät führen. Die hohen Spannungen des Zündimpulses erfordern einen großen technischen Aufwand und somit hohe Kosten für das System.For mercury-free discharge lamps is used to ignite them usually by means of a ballast pulse ignition with the ignition parameters dU / dt> 70 kV / μs and a voltage of more 20 kV. Mercury-free discharge lamps with capacitive starting aid ignite at these pulse parameters at an ignition voltage of about 16 kV, resulting in practice high scattering both between the lamps and the ignitions of the individual lamps. Thus, the ignition voltages can far exceed the ignition pulse provided by the ballast. This can lead both to an increased reject rate during production of the discharge lamps and to a poor ignition behavior of the system of discharge lamp and ballast. The high voltages of the ignition pulse require a great deal of technical effort and thus high costs for the system.

Es ist auch bekannt. Entladungslampen mittels einer kontinuierlichen Hochfrequenz zu zünden. Hierdurch wird eine deutliche Erniedrigung der Zündspannung auf ca. 10 kV erreicht, insbesondere bei einer Verwendung kapazitiver Zündhilfen, da diese bei höheren Frequenzen besonders wirksam sind. Dabei ist die praktische Realisierbarkeit, z.B. durch Resonanzkreise zur Zündung, für die benötigten Zündspannungen aufwändig und kostenintensiv, insbesondere aufgrund eines hohen Stroms in dem Resonanzkreis und die damit verbundenen hohen Güten der Bauelemente sowie eine hohe Strombelastung der Schalter. Auch stellt die kontinuierliche HF-Hochspannung hohe Ansprüche an die Isolierung bzw. Spannungsfestigkeit der verwendeten Installationskomponenten wie Kabel, Fassungen usw. Durch die kontinuierliche HF-Hochspannung erfolgt ferner eine unerwünschte starke Ionisierung dieser Komponenten.It is also known. To ignite discharge lamps by means of a continuous high frequency. This will be a clear Lowers the ignition voltage to about 10 kV, especially when using capacitive ignition aids, as they are particularly effective at higher frequencies. Here, the practical feasibility, eg by resonant circuits for ignition, for the required ignition voltages consuming and expensive, especially due to a high current in the resonant circuit and the associated high quality of the components and a high current load of the switch. Also, the continuous RF high voltage makes high demands on the insulation or dielectric strength of the installation components used such as cables, sockets, etc. Due to the continuous RF high voltage also takes place an undesirable strong ionization of these components.

WO 01/73817 A1 beschreibt eine Gasentladungslampe, die einen Brenner aufweist, der ein Entladungsgefäß mit einem Hohlraum aufweist, in dem eine Füllung mit Gas und anderen Stoffen angeordnet ist. In den Hohlraum ragen zwei Elektroden hinein, zwischen denen sich im Betrieb der Gasentladungslampe ein Lichtbogen ausbildet. Auf der Außenseite des Entladungsgefäßes sind im Bereich des Hohlraums zwei Hilfselektroden entgegengesetzter Polarität einander gegenüberliegend angeordnet. Die Hilfselektroden sind durch Beschichtung der Außenseite des Entladungsgefäßes mit elektrisch leitfähigem Material gebildet. Vor und gegebenenfalls auch während des Zündens der Gasentladungslampe wird an die Hilfselektroden hochfrequente Hochspannung angelegt, wodurch das Zünden der Gasentladungslampe erleichtert wird. WO 01/73817 A1 describes a gas discharge lamp having a burner having a discharge vessel with a cavity in which a filling with gas and other substances is arranged. In the cavity protrude two electrodes, between which an arc is formed during operation of the gas discharge lamp. On the outside of the discharge vessel, two auxiliary electrodes of opposite polarity are arranged opposite one another in the region of the cavity. The auxiliary electrodes are formed by coating the outside of the discharge vessel with electrically conductive material. Before and possibly also during the ignition of the gas discharge lamp, high frequency high voltage is applied to the auxiliary electrodes, whereby the ignition of the gas discharge lamp is facilitated.

WO 2004/090934 A1 beschreibt eine Hochdruckentladungslampe, aufweisend eine Glühbirne, die aus einer Seite einer Leuchteinheit mit einem Entladungsraum darin und einem Paar von Abdichtungseinheiten, die an dieser Leuchteinheit durchgängig angebracht sind, besteht, sowie einem Paar von Elektroden, die in dem Entladungsraum der Leuchteinheit angeordnet sind, wobei ein Teil eines Umgebungsleiters in einem spezifischen Bereich einer Bogenentladungsröhre an einer Abdichtungseinheit in einer fast spiralförmigen Form gewunden ist, und wobei der restliche Teil des Umgebungsleiters über den äußeren Teil einer Bogenentladungsröhre hinausragt, die mit einer Elektrode an der anderen Abdichtungseinheitsseite elektrisch zu verbinden ist. Wenn eine Hochfrequenzspannung bei einer Frequenz von 1 kHz bis 1 MHz an die Hochdruckentladungslampe, die wie oben strukturiert ist, angelegt wird, bevor das Entladen begonnen wird, kann die Durchschlagsspannung auf bis zu 8 kV gesteuert werden. WO 2004/090934 A1 describes a high pressure discharge lamp comprising a light bulb extending from one side of a lighting unit having a discharge space therein and a pair of sealing units passing through this lighting unit and a pair of electrodes disposed in the discharge space of the lighting unit, wherein a part of an environmental conductor in a specific area of an arc tube is wound on a sealing unit in a nearly spiral shape, and the remaining part of the environmental conductor is over protrudes the outer part of an arc tube, which is to be electrically connected to an electrode on the other sealing unit side. When a high frequency voltage is applied at a frequency of 1 kHz to 1 MHz to the high pressure discharge lamp structured as above before starting to discharge, the breakdown voltage can be controlled up to 8 kV.

WO 2006/064408 A1 beschreibt eine Hochfrequenzlampenschaltung für eine Gasentladungslampe, wobei die Lampenschaltung eine Reihenschaltung einer Wechselspannungsversorgungsquelle zum Zuführen einer Wechselspannung aufweist, aufweisend eine hohe Lampenbetriebsfrequenz, einen Vorschaltgeräteinduktor, einen Kondensator und Anschlüsse zur Verbindung mit einer Gasentladungslampe und, verbunden mit den Anschlüssen, eine Zündschaltung zum Zünden der Lampe. Der Kondensator weist einen Wert auf, welcher eine niedrige Impedanz für die Lampenbetriebsfrequenz darstellt. Die Zündschaltung weist eine Reihenanordnung einer Impedanz und eine Gleichspannungsquelle zum Zuführen einer hohen Gleichspannung auf. Die Reihenimpedanz der Zündschaltung weist einen Wert auf, welcher bezüglich eines Impedanzwertes der Lampe während dem Hochlauf und während dem Dauerbetrieb der Lampe hoch ist.Die DE10233400A1 offenbart ein bekanntes Verfahren des Stands der Technik. WO 2006/064408 A1 describes a high frequency lamp circuit for a gas discharge lamp, wherein the lamp circuit comprises a series connection of an AC supply source for supplying an AC voltage, having a high lamp operating frequency, a ballast inductor, a capacitor and connections for connection to a gas discharge lamp and, connected to the terminals, an ignition circuit for igniting the lamp , The capacitor has a value representing a low impedance for the lamp operating frequency. The ignition circuit has a series arrangement of an impedance and a DC voltage source for supplying a high DC voltage. The series impedance of the ignition circuit has a value which is high with respect to an impedance value of the lamp during start-up and during continuous operation of the lamp DE10233400A1 discloses a known method of the prior art.

Die DE102006010803A1 offenbart ein Entladungslampe mit einem kapazitiven Zündhilfselement.The DE102006010803A1 discloses a discharge lamp with a capacitive Zündhilfselement.

Es ist die Aufgabe der vorliegenden Erfindung, mindestens einen der Nachteile des Standes der Technik zumindest abzumildern und insbesondere eine Möglichkeit zur Zündung einer Gasentladungslampe bereitzustellen, welche besonders einfach und kostengünstig realisierbar ist.It is the object of the present invention to at least alleviate at least one of the disadvantages of the prior art and in particular to provide a possibility for igniting a gas discharge lamp, which is particularly simple and inexpensive to implement.

Diese Aufgabe wird gemäß den Merkmalen der unabhängigen Ansprüche gelöst. Bevorzugte Ausführungsformen sind insbesondere den abhängigen Ansprüchen entnehmbar.This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

Die Aufgabe wird gelöst durch ein Verfahren zum Betreiben einer Gasentladungslampe, wobei die Gasentladungslampe ein Entladungsgefäß, in dessen Hohlraum zwei Elektroden ragen, sowie mindestens ein Zündhilfselement aufweist, wobei an die Elektroden während eines Zündens der Gasentladungslampe eine mit einer hochfrequenten Wechselspannung überlagerte Gleichspannung angelegt wird.The object is achieved by a method for operating a gas discharge lamp, wherein the gas discharge lamp has a discharge vessel, in the cavity of which two electrodes protrude, and at least one Zündhilfselement, wherein the electrodes during ignition of the gas discharge lamp with a high-frequency alternating voltage superimposed DC voltage is applied.

Diese Ausgestaltung ermöglicht im Vergleich zu einer Verwendung eines Zündimpulses eine deutliche Erniedrigung der benötigten Zündspannung. Gleichzeitig lässt sich die Kombination aus der Gleichspannung und der hochfrequenten Wechselspannung mit niedrigerer Amplitude der Hochfrequenzspannung als bei einer ausschließlich hochfrequenten Zündung realisieren, wodurch sich einfachere und kostengünstigere Vorschaltgeräte, insbesondere elektronische Vorschaltgeräte (EVG), einsetzen lassen. Ein weiterer Vorteil ist, dass nur eine geringere Ionisierung der spannungsführenden Teile der Installation (Sockel, Zuleitungen etc.) auftritt. Dadurch wiederum kann die Spannungsfestigkeit der entsprechenden Komponenten geringer als bei der ausschließlich hochfrequenten Zündung gewählt werden. Neben der Erniedrigung der benötigten Zündspannung sinken zusätzlich noch die Streuung der Einzelzündungen einer Lampe sowie auch die Streuung der Lampen untereinander.This embodiment allows a significant reduction of the required ignition voltage in comparison to a use of an ignition pulse. At the same time, the combination of the DC voltage and the high-frequency AC voltage with a lower amplitude of the high-frequency voltage can be realized than with an exclusively high-frequency ignition, whereby simpler and less expensive ballasts, in particular electronic ballasts (ECG), can be used. Another advantage is that only a lower ionization of the live parts of the installation (base, leads, etc.) occurs. In turn, the dielectric strength of the corresponding components can be chosen to be lower than in the exclusively high-frequency ignition. In addition to the lowering of the required ignition voltage, the scattering of the individual ignitions of a lamp as well as the scattering of the lamps among each other also decrease.

Die kapazitive Zündhilfe wirkt auf mindestens eine in das Entladungsgefäß ragende Elektrode.The capacitive ignition aid acts on at least one electrode protruding into the discharge vessel.

Es ist also ein Anlegen bzw. Einspeisen der mit der hochfrequenten Wechselspannung überlagerten Gleichspannung nur an die Elektroden möglich.It is therefore possible to apply or supply the DC voltage superimposed with the high-frequency AC voltage only to the electrodes.

Es ist eine Ausgestaltung, dass die Gleichspannung in ihrem Betrag rampenartig, insbesondere annähernd linear, über die Zeit vergrößert wird.It is an embodiment that the DC voltage is increased in its magnitude ramp-like, in particular approximately linear, over time.

Alternativ kann die Gleichspannung z.B. unmittelbar auf dem gewünschten Spannungsniveau angelegt werden.Alternatively, the DC voltage may be e.g. be applied directly to the desired voltage level.

Es ist noch eine Ausgestaltung, dass die Gleichspannungsrampe innerhalb von ca. 1 s, insbesondere innerhalb von ca. 500 ms, durchfahren wird.It is still an embodiment that the DC voltage ramp is traversed within about 1 s, in particular within about 500 ms.

Es ist noch eine weitere Ausgestaltung, dass die Gleichspannung bis auf ein betragsmäßiges Spannungsniveau von max. 8 kV, insbesondere max. 7 kV, eingestellt wird.It is yet another embodiment that the DC voltage up to a magnitude voltage level of max. 8 kV, in particular max. 7 kV, is set.

Es ist ferner eine Ausgestaltung, dass die hochfrequente Wechselspannung eine Spitzenamplitude zwischen 3 kV und 6 kV, insbesondere zwischen 4 kV und 5 kV, aufweist.It is also an embodiment that the high-frequency AC voltage has a peak amplitude between 3 kV and 6 kV, in particular between 4 kV and 5 kV.

Es ist weiterhin eine Ausgestaltung, dass die hochfrequente Wechselspannung eine Frequenz zwischen 100 kHz und 4 MHz aufweist. So kann die hochfrequente Wechselspannung eine Frequenz zwischen 100 kHz und 400 kHz, insbesondere zwischen 150 kHz und 300 kHz, aufweist, was eine Auslegung der Hochfrequenzkomponenten erleichtert und eine Verwendung preiswerterer Komponenten ermöglicht. Alternativ kann die hochfrequente Wechselspannung z.B. eine Frequenz ab ca. 1 MHz, insbesondere zwischen ca. 1 MHz und ca. 4 MHz aufweisen, wodurch eine Effektivität des Energieeintrags gesteigert werden kann.It is also an embodiment that the high-frequency AC voltage has a frequency between 100 kHz and 4 MHz. Thus, the high-frequency AC voltage has a frequency between 100 kHz and 400 kHz, in particular between 150 kHz and 300 kHz, which facilitates a design of the high-frequency components and allows use of cheaper components. Alternatively, the high frequency AC voltage may be e.g. have a frequency from about 1 MHz, in particular between about 1 MHz and about 4 MHz, whereby an effectiveness of the energy input can be increased.

Es ist auch eine Ausgestaltung, dass das Entladungsgefäß eine quecksilberfreie Füllung aufweist (quecksilberfreie Entladungslampe).It is also an embodiment that the discharge vessel has a mercury-free filling (mercury-free discharge lamp).

Die mindestens eine kapazitive Zündhilfe kann beispielsweise eine Zündhilfsschicht, einen Zündhilfsdraht, eine beschicktete Quetschung, einen Rückleiter, einen das Entladungsgefäß umgebenden Reflektor o.ä. umfassen.The at least one capacitive starting aid can be, for example, an auxiliary starting layer, an auxiliary starting wire, a charged one Contusion, a return conductor, a reflector surrounding the discharge vessel or the like. include.

Die mindestens eine Zündhilfe kann galvanisch mit einem der beiden Lampenkontakte gekoppelt oder ohne eine galvanische Kontaktierung mit einem der beiden Lampenkontakte (potentialmäßig frei schwebend) aufgebaut sein.The at least one starting aid can be galvanically coupled to one of the two lamp contacts or constructed without galvanic contacting with one of the two lamp contacts (floating in terms of potential).

Es ist noch eine Weiterbildung, dass die hochfrequente Wechselspannung bzw. der Anteil der hochfrequenten Wechselspannung gleich oder größer als die für eine Übernahme der Lampe benötigte Spannung ist.It is still a development that the high-frequency AC voltage or the proportion of high-frequency AC voltage is equal to or greater than the voltage required for a takeover of the lamp.

Die Aufgabe wird auch gelöst durch ein Gasentladungslampensystem mit mindestens einer Gasentladungslampe und einem Steuergerät zum Ansteuern der mindestens einen Gasentladungslampe, wobei die mindestens eine Gasentladungslampe ein Entladungsgefäß, in dessen Hohlraum zwei Elektroden ragen, sowie mindestens ein Zündhilfselement aufweist, und das Steuergerät dazu eingerichtet ist, an die Elektroden der jeweiligen Gasentladungslampen eine mit einer hochfrequenten Wechselspannung überlagerte Gleichspannung anzulegen.The object is also achieved by a gas discharge lamp system having at least one gas discharge lamp and a control device for activating the at least one gas discharge lamp, the at least one gas discharge lamp having a discharge vessel, in the cavity of which two electrodes protrude, and at least one auxiliary starting element, and the control device is set up to to apply to the electrodes of the respective gas discharge lamps superimposed with a high-frequency AC voltage DC voltage.

In den folgenden Figuren wird die Erfindung anhand eines Ausführungsbeispiels schematisch genauer beschrieben. Dabei können zur Übersichtlichkeit gleiche oder gleichwirkende Elemente mit gleichen Bezugszeichen versehen sein.

Fig. 1
zeigt eine Entladungslampe mit einer kapazitiven Zündhilfe
Fig.2
zeigt eine Auftragung einer an die Entladungslampe aus Fig.1 angelegten (negativen) Spannung auf der Ordinate über die Zeit auf der Abszisse; und
Fig.3
zeigt eine Häufigkeitsverteilung der zum Zünden der Entladungslampe benötigten Zündspannung in kV auf der Abszisse für jeweils eine Gruppe von gleichartigen Entladuhgslampen.
In the following figures, the invention will be described schematically with reference to an embodiment schematically. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.
Fig. 1
shows a discharge lamp with a capacitive ignition aid
Fig.2
shows a plot of a to the discharge lamp Fig.1 applied (negative) voltage on the ordinate over time on the abscissa; and
Figure 3
shows a frequency distribution of ignition voltage required in kV on the abscissa for each of a group of similar Entladuhgslampen required for igniting the discharge lamp.

Fig.1 zeigt eine Gasentladungslampe 1 mit einem Entladungsgefäß 2, in deren Hohlraum 3 zwei Elektroden 4a, 4b und deren Hohlraum 3 mit einer quecksilberfreien Dampffüllung gefüllt ist. An einer Außenseite des Entladungsgefäßes 2 ist hier ein kapazitives Zündhilfselement ("kapazitive Zündhilfe") 5 vorhanden. Das Zündhilfselement 5 bildet hier zu jeder der Elektroden 4a, 4b hin eine Kapazität, welche mit jeder Halbwelle einer hochfrequenten Wechselspannung auf- bzw. umgeladen wird. Dadurch bildet sich in dem Hohlraum 3 ein elektrisches Wechselfeld aus, welches eine dielektrisch behinderte Entladung von in dem Hohlraum 3 vorhandenen Gasatomen oder Gasmolekülen hervorruft. Diese Entladung erzeugt Ladungsträger für eine vollständige Zündung der Gasentladungslampe 1 über die Elektroden 4a, 4b. Fig.1 shows a gas discharge lamp 1 with a discharge vessel 2, in the cavity 3, two electrodes 4a, 4b and the cavity 3 is filled with a mercury-free steam filling. On an outer side of the discharge vessel 2 here is a capacitive Zündhilfselement ("capacitive ignition aid") 5 is present. The Zündhilfselement 5 forms here to each of the electrodes 4a, 4b towards a capacity which is up or reloaded with each half-wave of a high-frequency alternating voltage. As a result, an alternating electric field is formed in the cavity 3, which causes a dielectrically impeded discharge of gas atoms or gas molecules present in the cavity 3. This discharge generates charge carriers for a complete ignition of the gas discharge lamp 1 via the electrodes 4a, 4b.

Das Zündhilfselement 5 kann mindestens eine Zündhilfsschicht, Zündhilfsdraht, beschichtete Quetschung, Rückleiter o.ä. umfassen. Das Zündhilfselement 5 kann grundsätzlich mit beiden Elektroden 4a, 4b oder nur mit einer der Elektroden 4a, 4b eine Kapazität bilden. So können zwei Zündhilfselemente 5 mit jeweils einer Elektrode 4a, 4b eine Kapazität bilden.The Zündhilfselement 5 can at least one Zündhilfsschicht, Zündhilfsdraht, coated pinch, return conductors o.ä. include. The Zündhilfselement 5 can basically form a capacitance with two electrodes 4a, 4b or only one of the electrodes 4a, 4b. Thus, two Zündhilfselemente 5, each with an electrode 4a, 4b form a capacity.

Die Zündung wird über ein elektronisches Vorschaltgerät 6 gesteuert, welches zur Zündung der Gasentladungslampe 1 hier an die beiden Elektroden 4a, 4b eine Kombination aus einer Gleichspannung und einer hochfrequenten Wechselspannung ('Hochfrequenzspannung') anlegt, wie genauer in Fig.2 erläutert.The ignition is controlled by an electronic ballast 6, which here for the ignition of the gas discharge lamp 1 here to the two electrodes 4a, 4b a combination of a DC voltage and a high frequency AC voltage ('high frequency voltage') applies, as in more detail Fig.2 explained.

Fig.2 zeigt eine Auftragung einer mittels des elektronischen Vorschaltgeräts 6 an die Elektroden 4a, 4b der Entladungslampe 1 angelegten Spannung U in Form einer Kombination aus einer (hier negativ aufgetragenen) Gleichspannung und einer hochfrequenten Wechselspannung in kV auf der Ordinate bzw. y-Achse über die Zeit t in ms auf der Abszisse bzw. x-Achse. Fig.2 shows a plot of a voltage applied by means of the electronic ballast 6 to the electrodes 4a, 4b of the discharge lamp 1 voltage U in the form of a combination of a (here negatively applied) DC voltage and a high frequency AC voltage in kV on the ordinate or y-axis over time t in ms on the abscissa or x-axis.

Bis knapp t=100 ms erzeugt das elektronische Vorschaltgerät 6 eine reine hochfrequente Wechselspannung, welche eine Spitzenamplitude bzw. Spitzenspannung (Spitze-zu-Spitze) Us von ca. 4,5 kV bei einer Frequenz von ca. 180 kHz aufweist. Ab knapp t=100 ms wird dieser hochfrequenten Wechselspannung einne Gleichspannung überlagert (oder umgekehrt). Dabei wird die Gleichspannung bis ca. t-500 ms auf ca. -6,5 kV erhöht. Dies entspricht einer in etwa linearen Rampe mit einer Steigung von betragsmäßig ca. 16 V/ms.Up to almost t = 100 ms, the electronic ballast 6 generates a pure high-frequency alternating voltage which has a peak amplitude or peak voltage (peak-to-peak) Us of approximately 4.5 kV at a frequency of approximately 180 kHz. From just under t = 100 ms, a direct voltage is superimposed on this high-frequency AC voltage (or vice versa). The DC voltage is increased to approx. T-500 ms to approx. -6.5 kV. This corresponds to an approximately linear ramp with a slope of approximately 16 V / ms.

Es hat sich überraschenderweise gezeigt, dass die überlangerung aus der Gleichspannung und der hochfrequenten Wechselspannung die Zündspannung Uz erheblich reduzieren kann, da auch hier durch die kapazitive Zündhilfe 5 eine erhebliche Energiemenge in das Gas in dem Entladungsgefäß 2 eingebracht werden kann, und dies, obwohl durch die Gleichspannung eine niedrigere Amplitude der hochfrequenten Wechselspannung benötigt wird als bei einer Zündung mit einer reinen hochfrequenten Wechselspannung.It has surprisingly been found that the Überübererung from the DC voltage and the high-frequency AC voltage can significantly reduce the ignition voltage Uz, since here by the capacitive ignition aid 5 a significant amount of energy can be introduced into the gas in the discharge vessel 2, and this, although by the DC voltage a lower amplitude of the high-frequency AC voltage is required than in an ignition with a pure high-frequency AC voltage.

Fig.3 zeigt eine Häufigkeitsverteilung einer Zahl N von gleichartigen Entladungslampen auf der Ordinate verteilt über die zum Zünden der jeweiligen Entladungslampe benötigten Zündspannung Uz in kV auf der Abszisse, und zwar sowohl für eine Zündung mittels eines Zündimpulses P als auch alternativ für eine Zündung mittels der Kombination K aus der Gleichspannung und der hochfrequenten Wechselspannung. Bei der Impulszündung ist die Durchbruchspannung oder Zündspannung der Entladungslampen bei einem Zünden auf einer ersten ansteigenden Flanke des Zündimpulses P angegeben. Zündungen außerhalb der ersten ansteigenden Flanke des Zündimpulses P (z.B. auf einer abfallenden Flanke oder während einer folgenden Halbwelle) sind durch den gepunktet eingezeichneten Abbruch der Verteilung bei ca. 18,5 kV angedeutet. Figure 3 shows a frequency distribution of a number N of similar discharge lamps on the ordinate distributed over the required for the respective discharge lamp ignition voltage Uz in kV on the abscissa, both for ignition by means of an ignition pulse P and alternatively for ignition by means of the combination K from the DC voltage and the high-frequency AC voltage. In the case of pulse ignition, the breakdown voltage or ignition voltage of the discharge lamps is indicated on ignition on a first rising edge of the ignition pulse P. Ignitions outside the first rising edge of the ignition pulse P (eg on a falling edge or during a following half-wave) are indicated by the dotted marked termination of the distribution at about 18.5 kV.

Während eine Zündspannung bis zur Übernahme bei einem pulsartigen Zündimpuls P für die meisten Entladungslampen 1 ein Verteilungsmaximum bei ca. 15 kV zeigt, liegt das Verteilungsmaximum für die Kombination K aus der Gleichspannung und der hochfrequenten Wechselspannung bei nur zwischen ca. 9 kV und 10 kV, Zudem ist die Streuung bzw. Standardabweichung der Verteilung für die Kombination K schmaler als für die pulsartige Zündung, was eine einfachere Auslegung des Vorschaltgeräts und/oder einen geringeren Ausschuss ermöglicht.While an ignition voltage until the acquisition at a pulse-like ignition pulse P for most discharge lamps 1 a Distribution maximum at about 15 kV, the distribution maximum for the combination K from the DC voltage and the high-frequency AC voltage is only between about 9 kV and 10 kV, In addition, the scattering or standard deviation of the distribution for the combination K is narrower than for the Pulse-type ignition, which allows a simpler design of the ballast and / or a lower rejects.

Selbstverständlich ist die vorliegende Erfindung nicht auf das gezeigte Ausführungsbeispiel beschränkt.Of course, the present invention is not limited to the embodiment shown.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
GasentladungslampeGas discharge lamp
22
Entladungsgefäßdischarge vessel
33
Hohlraumcavity
4a4a
Elektrodeelectrode
4b4b
Elektrodeelectrode
55
Zündhilfselementauxiliary ignition
66
Vorschaltgerätballast
KK
Kombination aus Gleichspannung und hochfrequenter WechselspannungCombination of DC voltage and high frequency AC voltage
PP
Zündimpulsignition pulse
NN
Zahl von EntladungslampenNumber of discharge lamps
tt
ZeitTime
UU
Spannungtension
UsUs
Spitzenspannungpeak voltage
UzUz
Zündspannungignition

Claims (4)

  1. Method for operating a gas discharge lamp (1), wherein the gas discharge lamp (1) has a discharge vessel (2), into the cavity (3) of which two electrodes (4a, 4b) protrude, and a capacitive auxiliary ignition element (5),
    wherein
    - during ignition of the gas discharge lamp, a DC voltage superimposed with a high-frequency AC voltage is applied to the electrodes (4a, 4b),
    - the magnitude of the DC voltage is increased in a ramp-like manner over time,
    - the DC voltage ramp is passed through within a maximum of 1 s,
    - the DC voltage is adjusted to a voltage level in terms of magnitude of a maximum of 8 kV, and
    - the high-frequency AC voltage has a peak amplitude between 3 kV and 6 kV.
  2. Method according to Claim 1, wherein the DC voltage superimposed with the high-frequency AC voltage is applied to the at least one capacitive auxiliary ignition element (5) and a reference point of the high-frequency AC voltage is connected to one of the two electrodes (4a, 4b).
  3. Method according to either of the preceding claims, wherein the high-frequency AC voltage has a frequency between approximately 100 kHz and approximately 4 MHz, in particular between approximately 150 kHz and approximately 400 kHz or between approximately 1 MHz and approximately 4 MHz.
  4. Method according to one of the preceding claims, wherein the discharge vessel (2) has a mercury-free fill.
EP11714761.1A 2010-04-27 2011-04-14 Method for operating a gas discharge lamp and gas discharge lamp system Not-in-force EP2529597B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028222A DE102010028222A1 (en) 2010-04-27 2010-04-27 Method for operating a gas discharge lamp and gas discharge lamp system
PCT/EP2011/055896 WO2011134800A2 (en) 2010-04-27 2011-04-14 Method for operating a gas discharge lamp and gas discharge lamp system

Publications (2)

Publication Number Publication Date
EP2529597A2 EP2529597A2 (en) 2012-12-05
EP2529597B1 true EP2529597B1 (en) 2017-05-31

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CN (1) CN102870500A (en)
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JP2016075679A (en) * 2014-10-02 2016-05-12 アトラス・マテリアル・テスティング・テクノロジー・エル・エル・シー Supply power without igniter for xenon lamp in accelerated weathering test apparatus
JP6174652B2 (en) 2015-10-05 2017-08-02 ファナック株式会社 Numerical control device with automatic parameter selection function according to the size of the processing area
WO2020196119A1 (en) 2019-03-28 2020-10-01 日東電工株式会社 Curable adhesive sheet and method for producing curable adhesive sheet

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JPH0689793A (en) * 1992-09-09 1994-03-29 Kansei Corp Discharge lamp drive circuit
WO2001073817A1 (en) 2000-03-28 2001-10-04 Robert Bosch Gmbh Gas discharge lamp with ignition assisting electrodes, especially for automobile headlights
DE10233400A1 (en) * 2002-07-23 2004-02-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit arrangement for operating discharge lamps
EP1617460B1 (en) 2003-04-09 2011-08-17 Panasonic Corporation Lighting method for high-pressure mercury discharge lamp, high-pressure mercury discharge lamp device, and image display unit and head light unit using said device
EP1632985B1 (en) * 2004-09-07 2014-06-25 OSRAM GmbH High-pressure discharge lampe
JP2008523573A (en) 2004-12-14 2008-07-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ High frequency gas discharge lamp circuit
DE102006010803A1 (en) * 2006-03-07 2007-09-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH A method for producing a discharge lamp and a lamp produced by such a method
US20100181910A1 (en) * 2007-06-21 2010-07-22 Koninklijke Philips Electronics N.V. High-pressure discharge lamp comprising a starter antenna
JP2010010088A (en) * 2008-06-30 2010-01-14 Phoenix Denki Kk Starting circuit of lighting device for high-pressure discharge lamp with auxiliary light source, lighting device using the starting circuit, and light source device using the lighting device

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JP2013525984A (en) 2013-06-20
JP5627766B2 (en) 2014-11-19
WO2011134800A2 (en) 2011-11-03
EP2529597A2 (en) 2012-12-05
DE102010028222A1 (en) 2011-10-27
WO2011134800A3 (en) 2012-06-21
CN102870500A (en) 2013-01-09

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