EP1477046B1 - Lamp sensor for a choke for operating a gas discharge lamp - Google Patents
Lamp sensor for a choke for operating a gas discharge lamp Download PDFInfo
- Publication number
- EP1477046B1 EP1477046B1 EP03704522A EP03704522A EP1477046B1 EP 1477046 B1 EP1477046 B1 EP 1477046B1 EP 03704522 A EP03704522 A EP 03704522A EP 03704522 A EP03704522 A EP 03704522A EP 1477046 B1 EP1477046 B1 EP 1477046B1
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- EP
- European Patent Office
- Prior art keywords
- gas discharge
- discharge lamp
- lamp
- circuit
- voltage
- 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
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Classifications
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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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
Definitions
- the invention relates to a ballast for at least one gas discharge lamp according to the preamble of claim 1.
- the lamp electrodes are preheated before the ignition voltage is applied between them. It has been shown that the life of the lamps can be extended to a considerable extent by this measure.
- the gas discharge lamp is usually operated on a series resonant circuit, wherein the resonant circuit capacitor is generally parallel to the Entladurigsddle the gas discharge lamp.
- the electrodes of the gas discharge lamp are designed as heating coils through which the current of the resonant circuit flows when the lamp is not lit.
- the frequency is changed relative to the resonance frequency of the series resonant circuit such that the voltage across the resonant capacitor and thus across the gas discharge lamp does not cause ignition of the gas discharge lamp.
- a substantially constant current flows through the lamp electrodes designed as helices; so that they are preheated.
- the frequency is adjusted in the vicinity of the resonant frequency of the resonant circuit, whereby the voltage across the resonant capacitor increases so that the gas discharge lamp finally ignites.
- the ballast should additionally have a function monitoring the state of the gas discharge lamp in order to detect possible malfunctions and to be able to initiate corresponding measures. These measures may include, for example, the shutdown of the high voltage part.
- a malfunction may be present, for example, if one of the two coils or both are defective, or if the gas discharge lamp has been completely removed or not (correctly) used in the sockets of the lamp.
- a ballast designed as an ASIC for two tandem arc gas discharge lamps having a number of fault detectors for various functions.
- the divided lamp voltage of the two gas discharge lamps is detected and fed via a first path of a control circuit.
- the load circuit current (inductor current) or after the ignition of the lamp current is detected and fed to the control circuit via a second separate path.
- a ballast for the operation of a gas discharge lamp having two interconnected detection circuits.
- the one detection circuit picks up the voltage of a supply bus and deactivates the inverter if the bus voltage is too high (ie excessive mains voltage).
- the other detection circuit picks up the voltage at the "hot" end of the coupling capacitor and deactivates the inverter at too high a voltage in the resonant circuit (in case of non-ignition after a predetermined time).
- Fig. 3 schematically shows a section of a known ballast, which is designed on the one hand for detecting a lamp failure (coil breakage, non-insertion or removal of the gas discharge lamp, etc.) and on the other hand for detecting the lamp voltage.
- a lamp failure coil breakage, non-insertion or removal of the gas discharge lamp, etc.
- a lamp voltage It is denoted by the reference numeral-1 in the FIGS. 1 to 3 schematically an inverter with its two alternately clocked switches (power transistors) 17 and 18 referred to.
- a load circuit 3 At the node of the inverter 1, a load circuit 3 is connected, which has a series resonant circuit 22, consisting of a resonance inductor 16 ( L R ) and a resonant capacitor 5 ( C R ).
- a coupling capacitor 2 (C K) is provided which connects the load circuit 3 to the capacitive node of the inverter. 1
- the discharge path of the gas discharge lamp 4 is connected in parallel
- the heating coils 8 and 9 of the gas discharge lamp 4 can be seen.
- a measuring resistor 26 ( R ) is connected, through which the lamp current and the Helical current flows.
- a measuring signal 10a (S1) can be tapped which shows whether a heating current can flow through the filaments 8 and 9 in the non-ignited state of the lamp and thus whether a gas discharge lamp 4 with proper heating filaments 8 and 9 is inserted in the provided sockets.
- a voltage divider 7 is additionally connected in parallel to the gas discharge lamp 4 on the side of the coupling capacitor 2 (C K ) of the load circuit 3.
- This voltage divider 7 has two resistors 14 and 15 ( R 1 and R 2 ), which are connected in series.
- a signal 10b (S2) can be tapped, which is representative of the voltage applied across the discharge path of the gas discharge lamp 4 voltage.
- the invention thus provides a ballast for operating a gas discharge lamp.
- an inverter having two series-connected and connected to a DC voltage source, in push-pull transistor switch ( T 1 or T 2 ), which are connected via a coupling capacitor ( C K ) with a load circuit.
- the load circuit as already known from the prior art, the gas discharge lamp and a series resonant circuit.
- a sensor circuit for the combined detection of a lamp failure and the voltage applied to the gas discharge lamp voltage on the basis of a single measurement signal (S2) is provided.
- the sensor circuit has a voltage divider which, on the one hand, is connected to the "upper" potential-carrying filament of the lamp and, on the other hand, to ground.
- a high resistance R K is connected in parallel to easily form a DC branch.
- the sensor circuit 6 allows the tapping of a sensor signal (S2) for detecting a lamp failure or for detecting the lamp voltage.
- S2 sensor signal
- the sensor circuit may be integrated in an ASIC.
- the heating power can be capacitively or inductively coupled into at least one filament of the gas discharge lamp.
- Fig. 1 schematically an embodiment of the present invention is shown.
- the ballast according to the invention has an inverter 1 with two series-connected, connected to a DC voltage source U bus and alternately clocked transistor switches 17 and 18 ( T 1 and T 2 ) on.
- the switching can be effected by a control unit 23, which can be realized as an integrated circuit (IC) and in particular in an ASIC.
- a load circuit 3 is connected, which has a series resonant circuit 22 and the lamp 4.
- the series resonant circuit 22 consists of a resonance inductor 16 ( L R ) and a resonant capacitor 5 ( C R ) .
- the discharge path of the gas discharge lamp 4 between the two heating coils 8 and 9 is, as known, connected in parallel with the resonance capacitor 5 ( C R ).
- a high-resistance resistor 12 ( R x ) is connected, so that bypassing the coupling capacitor 2 ( C k ) a low direct current I DC through the upper heating coil 8 and a later explained in detail voltage divider can flow.
- a measuring signal 10b is generated (Sensor signal S2) tapped, which after an analog-to-digital conversion of a (digital) evaluation circuit 13 can be supplied.
- This evaluation circuit 13 can also be implemented as an integrated circuit.
- the voltage divider 7 together with the signal tap 11 thus represents a sensor circuit 6 for detecting a lamp failure as well as for detecting the lamp voltage.
- the high-resistance resistor 12 ( R K ) in the parallel branch of the coupling capacitor 2 ( C K ) further has the advantage that it so-called "Walmen", ie alternately bright and dark sections in the gas discharge lamp 4, by providing a can at least greatly reduce certain DC component.
- Fig. 2 shows a further embodiment of the present invention.
- the coupling of the heating power takes place in the heating coils 8 and 9 inductively via the two coils 19 and 20 ( L h 1 , and L h 2 ) of a transformer. While a capacitive coupling of the heating power is usually preferred in non-dimmed devices, the dimmed devices, the inductive form of Schumacherseinkopplung is preferred.
- the primary winding 21 ( L h 3 ) of a separate transformer can be used as a primary winding for the inductive heating power transmission.
- the resonance inductance 16 ( L R ) is also shown schematically that the primary winding 21 ( L h 3 ) of a separate transformer can be used as a primary winding for the inductive heating power transmission.
- the resonance inductance 16 ( L R ) is also shown schematically as a primary winding for the inductive coupling of the heating power into the heating coils 8 and 9 of the gas discharge lamp 4.
- any type of coupling of the heating power in the heating coils 8 and 9 can be applied.
- Inductance L h 2 (implemented as a primary winding of a heating transformer Tr 2 ) for inductive coupling of the heating power in the second (lower) heating coil 9 of the gas discharge lamp.
- Inductance L h 3 (realized as a primary winding of a heating transformer Tr 3 ) for inductive coupling of the heating power in the heating coils of the gas discharge lamp.
- 4 22 Series resonant circuit as part of the load circuit 3
- Control unit (implemented as IC or ASIC) for driving the two realized as a self-locking n-channel MOSFETs T 1 and T 2 transistor switch 17 and 18th 24 Coupling capacitor C h 1 in Einkoppelzweig the first (upper) heating coil 8 of the gas discharge lamp.
- 4 25 Coupling capacitor C h 2 in Einkoppelzweig the second (lower) heating coil 9 of the gas discharge lamp.
- 4 26 Measuring resistor R , connected in series with the second (lower) heating coil of the gas discharge lamp.
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Die Erfindung betrifft ein Vorschaltgerät für mindestens eine Gasentladungslampe gemäß dem Oberbegriff des Anspruches 1.The invention relates to a ballast for at least one gas discharge lamp according to the preamble of
Üblicherweise werden heutzutage bei hochwertigen Vorschaltgeräten für Gasentladungslampen die Lampenelektroden vorgeheizt, bevor die Zündspannung zwischen diesen angelegt wird. Es hat sich gezeigt, dass durch diese Maßnahme die Lebensdauer der Lampen in erheblichem Maße verlängert werden kann.Typically, nowadays in high quality ballasts for gas discharge lamps, the lamp electrodes are preheated before the ignition voltage is applied between them. It has been shown that the life of the lamps can be extended to a considerable extent by this measure.
Wie beispielsweise in
Das Vorschaltgerät sollte neben der Hauptfunktion der Initiierung, Aufrechterhaltung und Abschaltung der Gasentladung zusätzlich eine den Zustand der Gasentladungslampe überwachende Funktion aufweisen, um eventuelle Betriebsstörungen erfassen und dementsprechende Maßnahmen einleiten zu können. Diese Maßnahmen können beispielsweise die Abschaltung des Hochspannungsteils beinhalten.In addition to the main function of initiating, maintaining and switching off the gas discharge, the ballast should additionally have a function monitoring the state of the gas discharge lamp in order to detect possible malfunctions and to be able to initiate corresponding measures. These measures may include, for example, the shutdown of the high voltage part.
Eine Betriebsstörung kann beispielsweise dann vorliegen, wenn eine der beiden Wendeln oder auch beide defekt sind, oder wenn die Gasentladungslampe vollständig entfernt bzw. nicht (korrekt) in die Fassungen der Leuchte eingesetzt wurde.A malfunction may be present, for example, if one of the two coils or both are defective, or if the gas discharge lamp has been completely removed or not (correctly) used in the sockets of the lamp.
Aus
Eine weitere Anforderung an moderne Vorschaltgeräte ist die Erfassung der über der Entladungsstrecke der Gasentladungslampe anliegenden Spannung.Another requirement for modern ballasts is the detection of the voltage applied across the discharge path of the gas discharge lamp.
Nach der
Nach der
Weiterhin sind die Heizwendeln 8 und 9 der Gasentladungslampe 4 ersichtlich. In Serie zu der unteren Heizwendel 9, d.h. zwischen der Gasentladungslampe 4 und dem Masseknoten ist ein Messwiderstand 26 (R) geschaltet, durch den der Lampenstrom und der Wendelstrom fließt. Mittels der somit an dem Messwiderstand 26 (R) abfallenden Spannung kann ein Messsignal 10a (S1) abgegriffen werden, das wiedergibt, ob im ungezündeten Zustand der Lampe ein Heizstrom durch die Wendeln 8 und 9 fließen kann und ob somit eine Gasentladungslampe 4 mit ordnungsgemäßen Heizwendeln 8 und 9 in die dafür vorgesehenen Fassungen eingesetzt ist.Furthermore, the
Zur Erfassung der Lampenspannung ist zusätzlich auf der Seite des Koppelkondensators 2 (C K ) des Lastkreises 3 ein Spannungsteiler 7 parallel zur Gasentladungslampe 4 geschaltet. Dieser Spannungsteiler 7 weist zwei Widerstände 14 und 15 (R 1 bzw. R 2) auf, die in Serie geschaltet sind. Somit kann an dem Knotenpunkt 11 zwischen den beiden Widerständen 14 und 15 ein Signal 10b (S2) abgegriffen werden, das für die über der Entladungsstrecke der Gasentladungslampe 4 anliegende Spannung repräsentativ ist.For detecting the lamp voltage, a voltage divider 7 is additionally connected in parallel to the
Festzuhalten ist somit, dass bei einer derartigen bekannten Schaltungfür die Erfassung der Lampenspannung sowie für die Erkennung einer Betriebsstörung der Gasentladungslampe 4 je eine separat vorgesehenne Schaltung vorgesehen werden muss. Dementsprechend müssen auch zwei Signale S1 und S2 verwertet werden.It should be noted that in such a known circuit for the detection of the lamp voltage as well as for the detection of a malfunction of the
Angesichts der oben genannten Anforderungen an moderne elektronische Vorschaltgeräte ist es Aufgabe der vorliegenden Erfindung, eine Technologie bereitzustellen, die es erlaubt mit einer einzigen Sensorschaltung sowohl eine Lampenstörung (Wendelbruch, Nichteinsetzen bzw. Entnahme der Gasentladungslampe etc.) als auch die Lampenspannung in einfacher Weise detektieren kann.In view of the above requirements for modern electronic ballasts, it is an object of the present invention to provide a technology that allows with a single sensor circuit both a lamp failure (coil breakage, non-insertion or removal of the gas discharge lamp, etc.) and the lamp voltage in a simple manner can.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Die abhängigen Ansprüche bilden den zentralen Gedanken der Erfindung in besonders vorteilhafter Weise weiter.This object is achieved by the features of claim 1. Make the dependent claims continue the central idea of the invention in a particularly advantageous manner.
Erfindungsgemäß ist also ein Vorschaltgerät zum Betreiben einer Gasentladungslampe vorgesehen. Dabei ist ein Wechselrichter, der zwei in Serie liegende und an eine Gleichspannungsquelle angeschlossene, im Gegentakt geschaltete Transistor-Schalter (T 1 bzw. T 2) aufweist, welche über einen Koppelkondensator (CK ) mit einem Lastkreis verbunden sind. Der Lastkreis weist, wie aus dem Stand der Technik bereits bekannt, die Gasentladungslampe und einen Serienresonanzkreis auf. Schließlich ist eine sensorschaltung zum kombinierten Erkennen einer Lampenstörung sowie der an der Gasentladungslampe anliegenden Spannung anhand eines einzigen Messsignals (S2) vorgesehen. Die Sensorschaltung weist dabei einen Spannungsteiler auf, der einerseits mit der "oberen" potentialführende Wendel der Lampe und andereseits mit Masse verbunden. Zu dem Koppelkondensator ist ein hochohmiger Widerstand RK parallel geschaltet um auf einfache Weise eine Gleichstromzweig zu bilden.The invention thus provides a ballast for operating a gas discharge lamp. In this case, an inverter having two series-connected and connected to a DC voltage source, in push-pull transistor switch ( T 1 or T 2 ), which are connected via a coupling capacitor ( C K ) with a load circuit. The load circuit, as already known from the prior art, the gas discharge lamp and a series resonant circuit. Finally, a sensor circuit for the combined detection of a lamp failure and the voltage applied to the gas discharge lamp voltage on the basis of a single measurement signal (S2) is provided. In this case, the sensor circuit has a voltage divider which, on the one hand, is connected to the "upper" potential-carrying filament of the lamp and, on the other hand, to ground. To the coupling capacitor, a high resistance R K is connected in parallel to easily form a DC branch.
Die Sensorschaltung 6 ermöglicht den Abgriff eines Sensorsignals (S2) zum Erkennen einer Lampenstörung bzw. zur Erfassung der Lampenspannung. Somit ist es Vorteil der vorliegenden Erfindung, das auf Grundlage eines einzigen Sensorsignals (S2) sowohl eine Lampenstörung wie auch die Lampenspannung ausgewertet werden können.The sensor circuit 6 allows the tapping of a sensor signal (S2) for detecting a lamp failure or for detecting the lamp voltage. Thus, it is an advantage of the present invention that on the basis of a single sensor signal (S2) both a lamp failure and the lamp voltage can be evaluated.
Die Sensorschaltung kann in einem ASIC integriert sein.The sensor circuit may be integrated in an ASIC.
Die Heizleistung kann kapazitiv oder induktiv in wenigstens eine Wendel der Gasentladungslampe eingekoppelt sein.The heating power can be capacitively or inductively coupled into at least one filament of the gas discharge lamp.
Weiter Merkmale, Vorteile und Eigenschaften werden nunmehr, bezugnehmend auf die Figuren der begleitenden Zeichnungen und anhand einer detaillierten Beschreibung von Ausführungsbeispielen, erläutert.
- Fig. 1
- zeigt dabei ein erstes Ausführungsbeispiel der Erfindung in schematischer Weise,
- Fig. 2
- zeigt ein weiteres Ausführungsbeispiel der Erfindung, und
- Fig. 3
- zeigt eine bekanntes Vorschaltgerät.
- Fig. 1
- shows a first embodiment of the invention in a schematic way,
- Fig. 2
- shows a further embodiment of the invention, and
- Fig. 3
- shows a known ballast.
In
Parallel zu dem Koppelkondensator 2 (CK ) ist ein hochohmiger Widerstand 12 (Rx ) geschaltet, so dass unter Umgehung des Koppelkondensators 2 (Ck ) ein geringer Gleichstrom IDC durch die obere Heizwendel 8 sowie einen später noch im Detail erläuterten Spannungsteiler 7 fließen kann.Parallel to the coupling capacitor 2 ( C K ), a high-resistance resistor 12 ( R x ) is connected, so that bypassing the coupling capacitor 2 ( C k ) a low direct current I DC through the
Wie in
Die Funktion der erfindungsgemäßen Schaltung soll nunmehr erläutert werden. Die Auswerteschaltung 13 kann abhängig von dem Wert des Sensorsignals 10b (S2) die folgenden Leuchtzustände erkennen:
Wenn keine Gasentladungslampe 4 in die Fassungen der Leuchte eingesetzt ist oder aber wenn die obere Heizwendel 8der Gasentladungslampe 4 gebrochen ist, kann kein Gleichstrom IDC durch diese Heizwendel 8 und somit durch den Spannungsteiler 7 fließen. Dementsprechend fällt an dem Spannungsteiler 7 in diesem Fall auch keine Gleichspannung ab. Im ungezündeten Zustand liegt somit für den Fall einer Lampenstörung lediglich eine Wechselspannung entsprechend dem Schwingverhalten des Serienresonanzkreises 22 an dem Spannungsteiler 7 an. Dies kann wie gesagt auf Grundlage des Sensorsignals 10b (S2) durch dieAuswerteschaltung 13 erfasst werden. Für diesen Fall der Lampenstörung müssen unter Umständen sofort Maßnahmen getroffen werden, da beispielsweise ohne eingesetzte Gasentladungslampe 4 an dem Ausgang desWechselrichters 1 sehr hohe Spannungen auftreten können. Eine Maßnahme, die dann durch die Auswerteschaltung 13 veranlasst wird, kann dementsprechend in einer Systemabschaltung bzw. wenigstens in der Abschaltung desWechselrichters 1 bestehen.
- If no
gas discharge lamp 4 is inserted into the sockets of the lamp or if theupper heating coil 8 of thegas discharge lamp 4 is broken, no direct current I DC can flow through thisheating coil 8 and thus through the voltage divider 7. Accordingly, no DC voltage drops at the voltage divider 7 in this case. In the non-ignited state, therefore, there is only one in the event of a lamp failure AC voltage according to the vibration behavior of the seriesresonant circuit 22 to the voltage divider 7. As already stated, this can be detected by theevaluation circuit 13 on the basis of thesensor signal 10b (S2). Under certain circumstances, measures may have to be taken immediately for this case of lamp failure, since, for example, very high voltages can occur at the output of theinverter 1 without the use of agas discharge lamp 4. A measure, which is then caused by theevaluation circuit 13, can accordingly consist of a system shutdown or at least shutdown of theinverter 1.
Für den Fall, dass eine Gasentladungslampe 4, bei der wenigstens die obere Heizwendel 8 ordnungsgemäß arbeitet, in die dafür vorgesehenen Fassungen der Leuchte eingesetzt ist, kann durch diese obere Heizwendel 8 und somit auch durch den Spannungsteiler 7 ein Gleichstrom IDC fließen. Auf Grundlage des Sensorsignals 10b (S2) wird die Auswerteschaltung 13 in diesem Fall eine um einen Gleichspannungsabfall an dem Spannungsteiler 7 verschobene Wechselspannung erfassen.In the event that a
Die an der Gasentladungslampe 4 abfallende Wechselspannung wird also in jedem Fall gemessen. Abhängig davon, ob eine Lampe 4 mit ordnungsgemäßer oberer Heizwendel 8 eingesetzt ist oder nicht, ist diese Wechselspannung gegebenenfalls um die an dem Spannungsteiler abfallende Gleichspannung verschoben.The falling at the
Es ist darauf hinzuweisen, dass der hochohmige Widerstand 12 (RK ) im Parallelzweig des Koppelkondensators 2 (CK ) weiterhin den Vorteil aufweist, dass er das sogenannte "Walmen", d.h. abwechselnd helle und dunkle Abschnitte in der Gasentladungslampe 4, durch Bereitstellung eines gewissen Gleichstromanteils zumindest stark verringern kann.It should be noted that the high-resistance resistor 12 ( R K ) in the parallel branch of the coupling capacitor 2 ( C K ) further has the advantage that it so-called "Walmen", ie alternately bright and dark sections in the
In dieser Zeichnung ist auch schematisch dargestellt, dass als Primärwicklung für die induktive Heizleistungsübertragung die Primärwicklung 21 (L h3) eines gesonderten Transformators verwendet werden kann. Alternativ ist möglich, die Resonanzinduktivität 16 (LR ) als Primärwicklung zur induktiven Einkopplung der Heizleistung in die Heizwendeln 8 und 9 der Gasentladungslampe 4 zu verwenden.In this drawing is also shown schematically that the primary winding 21 ( L h 3 ) of a separate transformer can be used as a primary winding for the inductive heating power transmission. Alternatively, it is possible to use the resonance inductance 16 ( L R ) as a primary winding for the inductive coupling of the heating power into the heating coils 8 and 9 of the
Festzuhalten ist ferner, dass im Zusammenhang mit der vorliegenden Erfindung jegliche Art der Einkopplung der Heizleistung in die Heizwendeln 8 und 9 angewendet werden kann.It should also be noted that in connection with the present invention, any type of coupling of the heating power in the heating coils 8 and 9 can be applied.
Claims (5)
- Ballast for operating a gas discharge lamp, having:- an inverter (1), which has two switches (17 and 18) lying in series, connected to a DC voltage source (Ubus) and push-pull clocked, and which by means of a coupling capacitor (2) is connected to a load circuit (3) that has the gas discharge lamp (4) and a series resonance circuit (22), and- a sensor circuit (6) which has a voltage divider (7), which on the one hand is connected to the one of the two terminals of the potential-carrying coil (8) of the gas discharge lamp (4) and on the other hand is connected to ground, with a sensor signal (10b) being tapped off at the node point (11) of the voltage divider (7),characterised in that
connected in parallel to the coupling capacitor (2) there is a high-resistance resistor (12) which is connected to the other of the two terminals of the potential-carrying coil (8) of the gas discharge lamp (4). - Ballast according to claim 1,
characterised in that
the sensor circuit (6) is integrated in an ASIC. - Ballast according to one of the preceding claims,
characterised in that
the heating power is capacitatively coupled into the coils (8, 9) of the gas discharge lamp (4). - Ballast according to one of claims 1 to 2,
characterised in that
the heating power is inductively coupled into the coils (8, 9) of the gas discharge lamp (4). - Ballast according to one of the preceding claims,
characterised in that
the sensor signal (10b) is A/D converted and delivered to an evaluation circuit (13).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08155561.7A EP1945008B1 (en) | 2002-02-18 | 2003-02-03 | Light sensor for a pre-switching device for operating a gas discharge light |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10206731.7A DE10206731B4 (en) | 2002-02-18 | 2002-02-18 | Lamp sensor for a ballast for operating a gas discharge lamp |
DE10206731 | 2002-02-18 | ||
PCT/EP2003/001046 WO2003069963A1 (en) | 2002-02-18 | 2003-02-03 | Lamp sensor for a choke for operating a gas discharge lamp |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08155561.7A Division EP1945008B1 (en) | 2002-02-18 | 2003-02-03 | Light sensor for a pre-switching device for operating a gas discharge light |
EP08155561.7 Division-Into | 2008-05-02 |
Publications (2)
Publication Number | Publication Date |
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EP1477046A1 EP1477046A1 (en) | 2004-11-17 |
EP1477046B1 true EP1477046B1 (en) | 2010-04-14 |
Family
ID=27635102
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP08155561.7A Expired - Lifetime EP1945008B1 (en) | 2002-02-18 | 2003-02-03 | Light sensor for a pre-switching device for operating a gas discharge light |
EP03704522A Expired - Lifetime EP1477046B1 (en) | 2002-02-18 | 2003-02-03 | Lamp sensor for a choke for operating a gas discharge lamp |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP08155561.7A Expired - Lifetime EP1945008B1 (en) | 2002-02-18 | 2003-02-03 | Light sensor for a pre-switching device for operating a gas discharge light |
Country Status (6)
Country | Link |
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EP (2) | EP1945008B1 (en) |
CN (1) | CN1633830B (en) |
AT (1) | ATE464774T1 (en) |
AU (1) | AU2003206824A1 (en) |
DE (2) | DE10206731B4 (en) |
WO (1) | WO2003069963A1 (en) |
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---|---|---|---|---|
DE102004037390B4 (en) * | 2004-08-02 | 2008-10-23 | Infineon Technologies Ag | Control circuit for a fluorescent lamp with a diagnostic circuit and method for the diagnosis of a fluorescent lamp |
DE102005018763A1 (en) * | 2005-04-22 | 2006-10-26 | Tridonicatco Gmbh & Co. Kg | Operating devices with evaluation of the lamp temperature during lamp control |
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KR20110083823A (en) * | 2010-01-15 | 2011-07-21 | 삼성전자주식회사 | Detecting circuit of arc noise, light source driving apparatus having the same and method of driving a light source using the same |
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DE4120649A1 (en) * | 1991-06-22 | 1992-12-24 | Vossloh Schwabe Gmbh | OVERVOLTAGE PROTECTED BALLAST |
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DE19613149A1 (en) * | 1996-04-03 | 1997-10-09 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Circuit arrangement for operating electric lamps |
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-
2002
- 2002-02-18 DE DE10206731.7A patent/DE10206731B4/en not_active Expired - Fee Related
-
2003
- 2003-02-03 WO PCT/EP2003/001046 patent/WO2003069963A1/en active Application Filing
- 2003-02-03 AU AU2003206824A patent/AU2003206824A1/en not_active Abandoned
- 2003-02-03 DE DE50312613T patent/DE50312613D1/en not_active Expired - Lifetime
- 2003-02-03 EP EP08155561.7A patent/EP1945008B1/en not_active Expired - Lifetime
- 2003-02-03 EP EP03704522A patent/EP1477046B1/en not_active Expired - Lifetime
- 2003-02-03 AT AT03704522T patent/ATE464774T1/en active
- 2003-02-03 CN CN03804114.6A patent/CN1633830B/en not_active Expired - Fee Related
Patent Citations (1)
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DE4120649A1 (en) * | 1991-06-22 | 1992-12-24 | Vossloh Schwabe Gmbh | OVERVOLTAGE PROTECTED BALLAST |
Also Published As
Publication number | Publication date |
---|---|
EP1477046A1 (en) | 2004-11-17 |
DE50312613D1 (en) | 2010-05-27 |
DE10206731B4 (en) | 2016-12-22 |
EP1945008A1 (en) | 2008-07-16 |
CN1633830B (en) | 2010-06-30 |
CN1633830A (en) | 2005-06-29 |
EP1945008B1 (en) | 2013-09-11 |
AU2003206824A1 (en) | 2003-09-04 |
ATE464774T1 (en) | 2010-04-15 |
DE10206731A1 (en) | 2003-08-28 |
WO2003069963A1 (en) | 2003-08-21 |
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