WO2008116496A1 - Operating device and lighting system for low-pressure discharge lamps having temperature-dependant power return control - Google Patents
Operating device and lighting system for low-pressure discharge lamps having temperature-dependant power return control Download PDFInfo
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- WO2008116496A1 WO2008116496A1 PCT/EP2007/052895 EP2007052895W WO2008116496A1 WO 2008116496 A1 WO2008116496 A1 WO 2008116496A1 EP 2007052895 W EP2007052895 W EP 2007052895W WO 2008116496 A1 WO2008116496 A1 WO 2008116496A1
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- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- operating device
- circuit
- lamp
- pressure 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.)
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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
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation
-
- 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
- H05B41/2986—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions
Definitions
- the present invention relates to a control gear for low-pressure discharge lamps, which regulates the lamp power temperature-dependent above a maximum operating temperature in order to optimize the efficiency of the overall system.
- the maximum permissible operating temperature of a ballast for low-pressure discharge lamps is determined by the maximum operating temperature of certain individual components.
- the critical temperature results essentially from the ambient temperature, the lamp temperature and the self-heating of the ballast.
- the self-heating is essentially determined by the power loss generated in the ballast.
- the power reduction should only be carried out from a predefinable temperature threshold (operating temperature value).
- the present invention is therefore based on the object to provide a Radio-pressure discharge lamps and a lighting system, which allows a more effective and efficient operation of these low-pressure discharge lamps, even in relatively confined space conditions.
- safe operation with a relatively high system efficiency should be ensured even at relatively high temperatures at the site of the low-pressure discharge lamps.
- the simplest and most cost-effective ballast for low-pressure discharge lamps is provided, which continuously reduces the lamp power from a nominal service temperature value to a lower power at a higher temperature.
- circuit arrangement that performs a temperature-dependent power reduction, has a very simple and inexpensive construction. It is also advantageous that the circuit arrangement can be implemented with little effort in conventional ballasts.
- ballast according to the invention results from the features of the subclaims.
- FIG. 1 Schematic block diagram of the operating device according to the invention.
- Fig. 2 Diagram illustrating the relationship between the relative luminous flux ⁇ of a lighting system according to the invention and the relative network power P ⁇ .
- FIG. 3 Diagram showing the time profile of the ambient temperature Tu, the interior temperature T 1 , the temperature sensor temperature T NTC and the tube wall temperature of the low-pressure discharge lamp T t as a function of time.
- the operating device has a rectifier circuit with a line filter 1, whose output voltage is fed via a DC voltage converter 2 operating as a reactive current compensation.
- the intermediate circuit voltage applied to the output capacitor 21 of the voltage converter 2 is input to an inverter 3.
- the inverter and its output power are controlled by a microcontroller included in the operating unit.
- the microcontroller contains an analog / digital converter 71, a lamp power control 72, a setpoint input device 75 and a frequency generating device 76, which controls the driver circuit 9 not contained in the microcontroller.
- the microcontroller also contains a temperature control device 74 and a storage device 73 for a maximum temperature.
- a power value P ist of the lamp circuit is input to the microcontroller, converted to analog / digital and then fed to the lamp power control.
- the lamp power control also receives a power setpoint from an interface circuit 6.
- This interface circuit receives control commands from a lighting control bus and generates therefrom a lamp power set point that is input to the setpoint setter.
- the setpoint specification device 75 generates a lamp power setpoint signal for the lamp power control 72.
- the setpoint setting device 75, the lamp power control 72 and the frequency generation device 76 are preferably implemented as a software program in the microcontroller 7.
- a temperature detection circuit 8 generates an analog temperature actual value T ist with a temperature sensor R NTC . This is converted analog / digital and supplied to the temperature control 74. Here, the value is compared with a stored value representing the maximum operating temperature. When the maximum value is exceeded, the power setting is lowered according to the degree of exceeding the maximum temperature.
- the temperature sensor is preferably a temperature-dependent resistor, in this case a thermistor. This ensures a simple and inexpensive construction of the temperature detection circuit 8.
- the lamp power is preferably controlled by the frequency of the inverter. This ensures a simple and robust control loop. Because the inverter is not operated at a fixed frequency, is also the electromagnetic compatibility improved.
- the lighting system can always be operated with the optimum overall efficiency for this temperature.
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Beschreibung description
[1] Betriebsgerät und Beleuchtungssystem für Niederdruck-Entladungslampen mit temperaturabhängiger Leis- tungsrückregelung .[1] Control gear and lighting system for low-pressure discharge lamps with temperature-dependent power feedback.
Technisches GebietTechnical area
[2] Die vorliegende Erfindung betrifft ein Betriebsgerät für Niederdruck-Entladungslampen, welches oberhalb einer maximalen Einsatztemperatur die Lampenleistung temperaturabhängig zurückregelt, um den Wirkungsgrad des Gesamtsystems zu optimieren.The present invention relates to a control gear for low-pressure discharge lamps, which regulates the lamp power temperature-dependent above a maximum operating temperature in order to optimize the efficiency of the overall system.
Stand der TechnikState of the art
[3] Beleuchtungssysteme mit elektrischen Lampen und e- lektronischen Betriebsgeräten sind in vielfältiger Weise bekannt und werden in unterschiedlichen Situationen und Gegebenheiten eingesetzt. Bei leistungsgeregelten bzw. stromgeregelten elektronischen Betriebsgeräten kann es in sehr engen elektrischen Leuchten bzw. bei elektrischen Lampen, welche in relativ beengten Platzverhältnissen angeordnet sind, dazu führen, dass diese elektrischen Lampen nicht in ihrem Betriebsoptimum betrieben werden kön- nen. Je nach Temperatur des Einsatzortes, in denen diese elektrischen Leuchten angeordnet sind, kann es zu Temperaturen in der elektrischen Leuchte kommen, bei denen beispielsweise Quecksilber-Niederdruckentladungslampen ohne Amalgam relativ weit entfernt von ihrem optimalen Quecksilber-Dampfdruck betrieben werden. Der damit verbundene reduzierte Lichtstrom führt zu einer relativ unzureichenden Systemlichtausbeute des gesamten Beleuchtungssystems . [4] Ein weiteres Problem in solch beengten Platzverhaltnissen betrifft die Verhinderung einer thermischen Überlastung des Vorschaltgerates bedingt durch äußere Erwärmung durch die Lampe und Eigenerwärmung im Betrieb. Die maximal zulassige Betriebstemperatur eines Vorschaltgerates für Niederdruck-Entladungslampen wird bestimmt durch die maximale Betriebstemperatur bestimmter Einzelkomponenten. Die kritische Temperatur ergibt sich im wesentlichen aus der Umgebungstemperatur, der Lampentemperatur und der Eigenerwärmung des Vorschaltgerates. Die Eigenerwärmung wiederum wird wesentlich durch die im Vorschalt- gerat erzeugte Verlustleistung bestimmt. Um den Betrieb ohne Überlastung der Komponenten auch unter extremen Umgebungstemperaturen zu ermöglichen, ist es bei hohen Tem- peraturen vorteilhaft die Lampenleistung auf geringere Leistungswerte zu reduzieren, da hiermit die Verlustleistung des Betriebsgerates und somit die Eigenerwärmung verringert werden. Die Leistungsreduzierung soll dabei erst ab einer vorgebbaren Temperaturschwelle (Einsatztem- peraturwert) ausgeführt werden.[3] Lighting systems with electric lamps and electronic control gear are known in many ways and are used in different situations and circumstances. In the case of power-controlled or current-controlled electronic operating devices, in very narrow electrical luminaires or in electric lamps which are arranged in relatively restricted space conditions, these electric lamps can not be operated at their optimum operating conditions. Depending on the temperature of the site in which these electrical lights are arranged, there may be temperatures in the electric lamp in which, for example, low-pressure mercury discharge lamps without amalgam are operated relatively far from their optimal mercury vapor pressure. The associated reduced luminous flux leads to a relatively insufficient system luminous efficacy of the entire lighting system. Another problem in such a cramped space concerns the prevention of thermal overload of the ballast due to external heating by the lamp and self-heating during operation. The maximum permissible operating temperature of a ballast for low-pressure discharge lamps is determined by the maximum operating temperature of certain individual components. The critical temperature results essentially from the ambient temperature, the lamp temperature and the self-heating of the ballast. The self-heating, in turn, is essentially determined by the power loss generated in the ballast. In order to enable operation without overloading the components even under extreme ambient temperatures, it is advantageous at high temperatures to reduce the lamp power to lower power values, since this reduces the power loss of the operating device and thus the self-heating. The power reduction should only be carried out from a predefinable temperature threshold (operating temperature value).
Aufgabetask
[5] Der vorliegenden Erfindung liegt deshalb die Aufgabe zu Grunde, ein Betriebsgerat zum Betreiben von Niederdruck-Entladungslampen sowie ein Beleuchtungssystem zu schaffen, welches einen effektiveren und effizienteren Betrieb dieser Niederdruck-Entladungslampen auch in relativ beengten Platzverhaltnissen ermöglicht. Insbesondere soll auch bei relativ hohen Temperaturen am Einsatzort der Niederdruck-Entladungslampen ein sicherer Betrieb mit einem relativ hohen Systemwirkungsgrad gewahrleistet werden können. Darstellung der ErfindungThe present invention is therefore based on the object to provide a Betriebsgerat for operating low-pressure discharge lamps and a lighting system, which allows a more effective and efficient operation of these low-pressure discharge lamps, even in relatively confined space conditions. In particular, safe operation with a relatively high system efficiency should be ensured even at relatively high temperatures at the site of the low-pressure discharge lamps. Presentation of the invention
[6] Diese Aufgabe wird durch ein Betriebsgerät, welches die Merkmale nach Patentanspruch 1 aufweist, sowie ein Beleuchtungssystem, welches die Merkmale nach Patentan- spruch 8 aufweist, gelöst.[6] This object is achieved by an operating device having the features of claim 1, and a lighting system having the features according to patent claim 8, solved.
[7] Erfindungsgemäß wird ein möglichst einfaches und kostengünstiges Vorschaltgerät für Niederdruck- Entladungslampen geschaffen, welches die Lampenleistung ab einem vorgebbaren Einsatztemperaturwert von der Nenn- leistung kontinuierlich auf eine geringere Leistung bei einer höheren Temperatur reduziert.[7] According to the invention, the simplest and most cost-effective ballast for low-pressure discharge lamps is provided, which continuously reduces the lamp power from a nominal service temperature value to a lower power at a higher temperature.
[8] Dies geschieht dadurch, dass eine Funktionseinheit des Betriebsgerätes den die Lampenleistung bestimmenden Sollwert oberhalb eines vorgebbaren Einsatztemperaturwer- tes temperaturabhängig reduziert.[8] This happens because a functional unit of the operating device reduces the setpoint value determining the lamp power as a function of the temperature above a predefinable operating temperature value.
[9] Hierbei ist besonders vorteilhaft, dass eine Schaltungsanordnung, die eine temperaturabhängige Leistungsreduzierung durchführt, einen sehr einfachen und kostengünstigen Aufbau aufweist. Ebenfalls vorteilhaft ist, dass die Schaltungsanordnung mit nur geringem Aufwand in übliche Vorschaltgeräte implementiert werden kann.[9] It is particularly advantageous that a circuit arrangement that performs a temperature-dependent power reduction, has a very simple and inexpensive construction. It is also advantageous that the circuit arrangement can be implemented with little effort in conventional ballasts.
[10] Eine besonders vorteilhafte Ausführungsform des erfindungsgemäßen Vorschaltgerätes ergibt sich aus den Merkmalen der Unteransprüche.A particularly advantageous embodiment of the ballast according to the invention results from the features of the subclaims.
Kurze Beschreibung der Zeichnung (en)Short description of the drawing (s)
[11] Fig. 1 Schematisches Blockschaltbild des erfindungsgemäßen Betriebsgerätes. [12] Fig. 2 Diagramm zur Veranschaulichung der Beziehung zwischen dem relativen Lichtstrom Φ eines erfindungsgemäßen Beleuchtungssystems und der relativen Netzleistung P~ .[11] FIG. 1 Schematic block diagram of the operating device according to the invention. [12] Fig. 2 Diagram illustrating the relationship between the relative luminous flux Φ of a lighting system according to the invention and the relative network power P ~ .
[13] Fig. 3 Diagramm zur Darstellung des Zeitlichen Verlaufs der Umgebungstemperatur Tu, der Leuch- teninnentemperatur T1, der Temperatursensortemperatur TNTC und der Rohrwandtemperatur der Niederdruck-Entladungslampe Tt in Abhängig- keit von der Zeit.[13] FIG. 3 Diagram showing the time profile of the ambient temperature Tu, the interior temperature T 1 , the temperature sensor temperature T NTC and the tube wall temperature of the low-pressure discharge lamp T t as a function of time.
Bevorzugte Ausführung der ErfindungPreferred embodiment of the invention
[14] Das allgemeine Funktionsprinzip des Betriebsgerätes wird anhand der Fig. 1 beschrieben.[14] The general operating principle of the operating device will be described with reference to FIG. 1.
[15] Das Betriebsgerät weist eine Gleichrichterschaltung mit einem Netzfilter 1 auf, dessen Ausgangsspannung über einen als Blindstromkompensation arbeitenden Gleichspannungswandler 2 geführt wird. Die am Ausgangskondensator 21 des Spannungswandlers 2 anstehende Zwischenkreisspan- nung wird in einen Wechselrichter 3 eingegeben.[15] The operating device has a rectifier circuit with a line filter 1, whose output voltage is fed via a DC voltage converter 2 operating as a reactive current compensation. The intermediate circuit voltage applied to the output capacitor 21 of the voltage converter 2 is input to an inverter 3.
[16] Der Wechselrichter und seine Ausgangsleistung werden durch einen im Betriebsgerät enthaltenen MikroController gesteuert. Der MikroController enthält einen Analog/Digitalwandler 71, eine Lampenleistungsregelung 72, eine Sollwertvorgabeeinrichtung 75 und eine Frequenzer- zeugungseinrichtung 76, die die nicht im MikroController enthaltene Treiberschaltung 9 ansteuert. Erfindungsgemäß enthält der MikroController auch eine Temperaturregelungseinrichtung 74 und eine Speichereinrichtung 73 für eine Maximaltemperatur. [17] Ein Leistungsistwert Pist des Lampenkreises wird in den MikroController eingegeben, Analog/Digital gewandelt und dann der Lampenleistungsregelung zugeführt. Die Lampenleistungsregelung erhalt außerdem einen Leistungssoll- wert von einer Schnittstellenschaltung 6. Diese Schnittstellenschaltung nimmt Steuerbefehle von einem Lichtsteuerbus entgegen und erzeugt daraus einen Lampenleistungssollwert, der in die Sollwertvorgabeeinrichtung eingegeben wird. Die Sollwertvorgabeeinrichtung 75 erzeugt dar- aus ein Lampenleistungssollwertsignal für die Lampenleistungsregelung 72. Die Sollwertvorgabeeinrichtung 75, die Lampenleistungsregelung 72 und die Frequenzerzeugungseinrichtung 76 sind vorzugsweise als Software-Programm im MikroController 7 implementiert. Eine Temperaturerfas- sungsschaltung 8 generiert mit einem Temperatursensor RNTC einen analogen Temperaturistwert Tist. Dieser wird Analog/Digital gewandelt und der Temperaturregelung 74 zugeführt. Hier wird der Wert mit einem gespeicherten Wert, der die maximale Einsatztemperatur repräsentiert, vergli- chen. Bei Überschreiten des Maximalwertes wird die Leistungsvorgabe entsprechend dem Grad der Überschreitung der Maximaltemperatur erniedrigt.[16] The inverter and its output power are controlled by a microcontroller included in the operating unit. The microcontroller contains an analog / digital converter 71, a lamp power control 72, a setpoint input device 75 and a frequency generating device 76, which controls the driver circuit 9 not contained in the microcontroller. According to the invention, the microcontroller also contains a temperature control device 74 and a storage device 73 for a maximum temperature. [17] A power value P ist of the lamp circuit is input to the microcontroller, converted to analog / digital and then fed to the lamp power control. The lamp power control also receives a power setpoint from an interface circuit 6. This interface circuit receives control commands from a lighting control bus and generates therefrom a lamp power set point that is input to the setpoint setter. The setpoint specification device 75 generates a lamp power setpoint signal for the lamp power control 72. The setpoint setting device 75, the lamp power control 72 and the frequency generation device 76 are preferably implemented as a software program in the microcontroller 7. A temperature detection circuit 8 generates an analog temperature actual value T ist with a temperature sensor R NTC . This is converted analog / digital and supplied to the temperature control 74. Here, the value is compared with a stored value representing the maximum operating temperature. When the maximum value is exceeded, the power setting is lowered according to the degree of exceeding the maximum temperature.
[18] Der Temperatursensor ist bevorzugt ein temperaturab- hangiger Widerstand, in diesem Falle ein Heißleiter. Dies gewahrleistet einen einfachen und kostengünstigen Aufbau der Temperaturerfassungsschaltung 8.[18] The temperature sensor is preferably a temperature-dependent resistor, in this case a thermistor. This ensures a simple and inexpensive construction of the temperature detection circuit 8.
[19] Die Lampenleistung wird bevorzugt über die Frequenz des Wechselrichters geregelt. Dies gewahrleistet einen einfachen und robusten Regelkreis. Dadurch, dass der Wech- selrichter nicht mit einer festen Frequenz betrieben wird, ist auch die elektromagnetische Verträglichkeit verbessert .[19] The lamp power is preferably controlled by the frequency of the inverter. This ensures a simple and robust control loop. Because the inverter is not operated at a fixed frequency, is also the electromagnetic compatibility improved.
[20] Dadurch, dass die Temperaturregelung in den ohnehin schon vorhandenen MikroController integriert ist, belaufen sich die zusätzlichen Kosten für die Erfindung lediglich auf einige Bauteile für die Temperaturerfassungsschaltung[20] The fact that the temperature control is integrated into the already existing microcontroller, the additional cost of the invention only amount to some components for the temperature detection circuit
8.8th.
[21] Durch die erfindungsgemäße temperaturabhängige Rückregelung der Lampenleistung kann das Beleuchtungssystem immer mit dem für diese Temperatur optimalen Gesamtwirkungsgrad betrieben werden. [21] Due to the temperature-dependent re-regulation of the lamp power according to the invention, the lighting system can always be operated with the optimum overall efficiency for this temperature.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2007/052895 WO2008116496A1 (en) | 2007-03-27 | 2007-03-27 | Operating device and lighting system for low-pressure discharge lamps having temperature-dependant power return control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2007/052895 WO2008116496A1 (en) | 2007-03-27 | 2007-03-27 | Operating device and lighting system for low-pressure discharge lamps having temperature-dependant power return control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008116496A1 true WO2008116496A1 (en) | 2008-10-02 |
Family
ID=38740328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/052895 Ceased WO2008116496A1 (en) | 2007-03-27 | 2007-03-27 | Operating device and lighting system for low-pressure discharge lamps having temperature-dependant power return control |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008116496A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045555A1 (en) * | 2010-10-05 | 2012-04-12 | Tridonic Gmbh & Co Kg | Operating device with an adjustable critical temperature |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0490330A1 (en) * | 1990-12-07 | 1992-06-17 | Tridonic Bauelemente GmbH | Control circuit for gasdischarge lamps |
| US20030001517A1 (en) * | 2001-07-02 | 2003-01-02 | Piaskowski Andrew D. | Converter for converting an AC power main voltage to a voltage suitable for driving a lamp |
| US20050099142A1 (en) * | 2003-11-12 | 2005-05-12 | Cottongim David E. | Thermal protection for lamp ballasts |
-
2007
- 2007-03-27 WO PCT/EP2007/052895 patent/WO2008116496A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0490330A1 (en) * | 1990-12-07 | 1992-06-17 | Tridonic Bauelemente GmbH | Control circuit for gasdischarge lamps |
| US20030001517A1 (en) * | 2001-07-02 | 2003-01-02 | Piaskowski Andrew D. | Converter for converting an AC power main voltage to a voltage suitable for driving a lamp |
| US20050099142A1 (en) * | 2003-11-12 | 2005-05-12 | Cottongim David E. | Thermal protection for lamp ballasts |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045555A1 (en) * | 2010-10-05 | 2012-04-12 | Tridonic Gmbh & Co Kg | Operating device with an adjustable critical temperature |
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