EP1324643B1 - Ballast électronique avec protection en température - Google Patents

Ballast électronique avec protection en température Download PDF

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Publication number
EP1324643B1
EP1324643B1 EP02025345A EP02025345A EP1324643B1 EP 1324643 B1 EP1324643 B1 EP 1324643B1 EP 02025345 A EP02025345 A EP 02025345A EP 02025345 A EP02025345 A EP 02025345A EP 1324643 B1 EP1324643 B1 EP 1324643B1
Authority
EP
European Patent Office
Prior art keywords
control
frequency
circuit
stop
electronic ballast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02025345A
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German (de)
English (en)
Other versions
EP1324643A1 (fr
Inventor
Stefan Zudrell-Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridonicatco GmbH and Co KG
Original Assignee
Tridonicatco GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tridonicatco GmbH and Co KG filed Critical Tridonicatco GmbH and Co KG
Publication of EP1324643A1 publication Critical patent/EP1324643A1/fr
Application granted granted Critical
Publication of EP1324643B1 publication Critical patent/EP1324643B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—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
    • H05B41/2856—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit 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 present invention relates to a power-controlled electronic ballast for operating at least one gas discharge lamp.
  • Modern ballasts for operating gas discharge lamps, in particular fluorescent tubes, are often power-controlled.
  • the intermediate circuit voltage supplied to the inverter is kept substantially constant, while the current flowing through the inverter is regulated by changing the operating frequency. This is done, for example, by a shunt resistor provided in the half-bridge of the inverter, the voltage dropping across this shunt resistor being fed as the actual value for the half-bridge current to a control or regulating circuit.
  • the control or regulating circuit sets the operating frequency of the inverter so that the average current through the shunt resistor or the proportional mean voltage above it remain constant. With the DC link voltage kept constant and the current regulated in this way to a constant value, the lamp is always supplied with the same power.
  • Fluorescent tubes have a negative characteristic when their voltage is a function of the current. This means that at a certain temperature T1, the lamp voltage U LA drops as the lamp current I LA increases, as is the case, for example, in the characteristic curve U LA, T1 illustrated in FIG. If the dependency between current and voltage at a certain power is entered into the same diagram, since the power is the product of current and voltage, the hyperbola P also shown in FIG. 2 results. If the lamp now has a certain power regulated, so sets on the characteristic of the lamp an operating point, which corresponds to the intersection between the characteristic and the power hyperbola. In the example shown in FIG. 2, in which the power P is to be set, the operating temperature which corresponds to the lamp current I T1 results, for example, at the temperature T1. Usually, the lamps are designed so that the operating point is optimal at a certain temperature. This means that optimum light output is guaranteed when the lamp is operated at a certain temperature, typically between 30 ° C and 40 ° C.
  • the situation may occur that the temperature at which the lamp is actually operated, is significantly higher. This could be used, for example, in factory buildings a high heat development will be the case.
  • Increasing the temperature results in a new characteristic curve for the lamp and thus also a new operating point.
  • the new characteristic curve U LA, T2 results at the higher temperature T2 , and a new operating point is established which corresponds to the increased lamp current I T2 .
  • This new operating point is achieved in the context of the power control described above by reducing the operating frequency for the inverter.
  • the frequency range within which the lamp current is allowed to be controlled is limited downwards. Practically, a stop frequency is set, which must not be fallen below. When the stop frequency is reached, the ballast acts as a constant current source and no longer as a constant power source. As a result, the maximum current corresponding to the stop frequency can not be exceeded, thus preventing destruction or damage of some or all of the components of the ballast.
  • the stop frequency is also problematic, since several factors must be taken into account.
  • the highest possible stop frequency is desirable since the safety function described above must not be used too late and thus at too high currents. For example, if the lamp is operated at normal temperature with a frequency of about 45 kHz, then a stop frequency of about 41 kHz should be selected.
  • the operating frequency at normal temperature may fluctuate around the ideal value of 45 kHz, for example, due to the fact that the various elements of the electronic ballast are subject to tolerances. If all devices are to be operated at normal temperature at a certain power, then each ballast will have a slightly different operating frequency, as shown for example in Figure 3.
  • the curve I shown in FIG. 3 shows that the actual operating frequency of all Ballast is distributed around the optimum frequency f nm of 45 kHz and is approximately between 43 and 47 kHz.
  • the stop frequency f stop is distributed around an ideal value, as shown by the curve II. The reason for this again lies in certain tolerances of the components responsible for determining the stop frequency.
  • the operating frequency at normal temperature is already below the stop frequency. This is the case in the region F shown hatched in FIG. 3, in which the curves for the operating frequency (I) at normal temperature and the stop frequency (II) overlap. All ballasts that fall within this hatched area do not allow for proper lamp operation and are therefore considered scrap. In order to keep this proportion of such faulty ballasts low, the lowest possible stop frequency is therefore desirable, which, however, is in contradiction to the above-mentioned preference for the highest possible stop frequency.
  • the present invention is therefore an object of the invention to provide an electronic ballast, in which on the one hand early and reliable onset of current limiting is made possible and on the other hand ensures that the stop frequency in the initial state in each case below the operating frequency lies.
  • an electronic ballast having the features of claim 1. This is characterized by the fact that the stop frequency is temperature-dependent and - starting from a base stop frequency - increases with increasing temperature. In this way, it is possible to choose a correspondingly low base stop frequency, which is far enough below the operating frequency, so that in each case a proper lamp start is guaranteed. Starting from the base stop frequency then increases the stop frequency with increasing temperature, so that at higher temperatures in time uses a current limit, which avoids damage to the ballast. An adjustment of the ballast after its production is thus no longer necessary, which is why the invention contributes to a reduction in manufacturing costs, especially in non-dimmable ballasts.
  • the power control preferably takes place in that a control or regulating circuit detects the voltage drop across a resistance arranged at the base of the half-bridge, compares this actual value of the half-bridge current with a reference value and determines an operating frequency for the inverter on the basis of the comparison result.
  • the increase of the stop frequency with increasing temperature can be achieved in a simple and elegant way in that the control or regulating circuit derives the control signals for the inverter from a fundamental frequency, this fundamental frequency rising with increasing temperature.
  • the stop frequency which takes into account the control or regulating circuit internally when determining the frequency for the inverter, remains unchanged, while the effectively set at the inverter minimum frequency still increases.
  • the control or regulating circuit determines the currently present temperature - for example by measuring a temperature-dependent reference voltage - and then based on this temperature information determines a stop frequency, which increases according to the invention with increasing temperature.
  • a particularly advantageous embodiment of the ballast according to the invention is to form the control or regulating circuit for the inverter digital.
  • an analog / digital converter is provided, which converts the operating parameters detected by the control or regulating circuit into a digital value consisting of at least 2 bits.
  • an operating frequency for operating the inverter is then calculated in a digital computing block and converted by means of a driver circuit into corresponding control signals for the switching elements of the inverter.
  • This solution enables extensive integration of the ballast controls.
  • the implementation of the analog measured operating parameters into digital values with high accuracy enables a high stability in the control of the lamp power.
  • This digital embodiment can be extended, for example, to the control circuit for the smoothing circuit.
  • the base stop frequency for the ballast can be specified by a connectable to the control or regulating circuit reference resistance whose size is determined by a provided in the control or regulating circuit analog / digital converter, which after connecting an internal power source, converts the voltage dropping across this reference resistor into a digital value also consisting of at least 2 bits.
  • the control circuits for the inverter and the intermediate circuit voltage are also digital in the manner described above, a further reduction of the components can be achieved by merely converting in control or regulation circuit the detected operating parameters and the voltage drop across the reference resistor a single analog / digital converter is provided which operates in time division multiplex.
  • the digital values converted by the analog / digital converter have an accuracy of 12 bits.
  • the electronic ballast shown in Figure 1 is the input side connected via a high-frequency filter 1 to the mains supply voltage U 0 .
  • a rectifier circuit 2 in the form of a full-bridge rectifier, which converts the mains supply voltage U 0 in a rectified input voltage for the smoothing circuit 3.
  • the smoothing circuit 3 is used for harmonic filtering and smoothing the rectified input voltage and comprises a smoothing capacitor C1 and a boost converter having an inductance L1, a controllable switch in the form of a MOS field-effect transistor S1 and a diode D1.
  • the boost converter illustrated here other known smoothing circuits can also be used.
  • a storage capacitor C2 adjoining the smoothing circuit 3 is applied DC link voltage U z generated, which is supplied to the inverter 4.
  • This inverter 4 consists of two arranged in a half-bridge arrangement MOS field effect transistors S2 and S3.
  • an alternating voltage is generated at the midpoint of the half-bridge, which is supplied to the load circuit 5 with the gas discharge lamp LA connected thereto.
  • the gas discharge lamp LA is in particular a fluorescent tube.
  • the three MOS field-effect transistors S1-S3 of the smoothing circuit 3 and the inverter 4 are driven by a control or regulating circuit 6 which generates corresponding control information and transmits this to a driver circuit 7 which converts this control information into corresponding control signals for the gates of the three MOS transistors.
  • Field effect transistors S1-S3 converts.
  • the control information is determined based on operating parameters that are taken from the smoothing circuit and the inverter 4 or the load circuit 5.
  • the intermediate circuit voltage U z falling across the storage capacitor C2 is determined, on the other hand the shunt resistor R1 which drops across this resistor R1 or the average half-bridge current and thus ultimately that of the lamp is connected via a shunt resistor R1 arranged at the base of the half-bridge of the inverter 4 LA supplied power determined.
  • the intermediate circuit voltage U z is thereby converted by a first analog / digital converter ADC1 into a digital value which is fed to a first digital arithmetic block 8.
  • This calculation block 8 calculates by means of the from the analog / digital converter ADC1 obtained actual value of the intermediate circuit voltage U a suitable switching frequency for the MOS field effect transistor S1 for the boost converter. This frequency is transmitted to the driver circuit 7, which drives the gate of the transistor S1 accordingly. In this way, the intermediate circuit voltage U z is kept constant at a certain value.
  • the drop across the shunt resistor R1 at the base of the half-bridge voltage is converted by a second analog-to-digital converter ADC2 and fed to a comparison block 9.
  • This - also digitally operating - comparison block 9 compares the current actual value of the lamp power with a predetermined reference value P ref and determines from the comparison result, whether the frequency of the inverter 4 must be increased or reduced to operate the lamp LA with the desired power.
  • This information will be available later described in more detail logic block 10 to an output block 11, which outputs corresponding control information to the driver circuit 7, which in turn drives the two MOS field-effect transistors S2 and S3 of the inverter 4. In this way, the operating frequency of the inverter 4 is adjusted so that the lamp LA is operated at the desired power.
  • the frequency of the inverter 4 should not fall below a certain minimum value in order to avoid excessive currents in the ballast and the lamp LA.
  • This stop frequency is determined by an external reference resistor R2, which is connected to the control or regulating circuit 6.
  • the height of the resistor R2 is a measure of the stop frequency f stop . It is determined by the fact that the terminal of the resistor R2 is connected to a provided in the control or regulation circuit 6 internal current source I s via a switch S4. The voltage which then drops across the resistor R2 is converted by a third analog / digital converter ADC3.
  • the logic block 10 was inserted into the digital control circuit for the lamp power, firstly the result supplied by the comparison block 9 and secondly the value determined by the third analog / digital converter ADC3, which is a measure of the stop frequency is to be supplied.
  • the logic block 9 now determines whether the operating frequency f run determined by the comparison block 9 is above or below the stop frequency f stop . If the operating frequency f run is above the stop frequency f stop , then it is transmitted unchanged to the output block 11, which drives the inverter 4 with the aid of the driver circuit 7. In this case, therefore, the stop frequency f stop does not affect the control operation for the lamp power.
  • the stop frequency f stop indicates the maximum current at which the lamp LA is operated.
  • the control loop now changes to a state in which the ballast is a constant current source for the lamp LA, whereby the occurrence of excessive currents and damage to the ballast is avoided.
  • the reference resistance R2 is designed such that the stop frequency f stop predetermined by it is sufficiently below the operating frequency necessary for the desired lamp power at normal operating temperatures f run lies. This ensures that in each case a regular lamp start can be performed and the current limit is not already used at start of operation.
  • the stop frequency f stop to be raised to allow timely insertion of the current limit.
  • This is achieved by providing the central clock 12, which is provided in the control or regulation circuit 6, in a temperature-dependent manner.
  • This clock 12 transmits to all components of the control or regulating circuit 6 a clock signal to enable a synchronous operation of the various units.
  • this clock signal is also transmitted to the output block 11 of the lamp power control circuit; which also uses this clock signal to convert the frequency value obtained from the logic block 10, which is in digital form, into corresponding high-frequency control signals for the driver circuit 7. Since the clock 12 is temperature-dependent applies to the frequency f base of the transmitted from him to all components of the control or regulating circuit 6 clock signal:
  • f Base f Base . 0 - TK ⁇ ( T - T 0 )
  • the temperature dependence of the clock 12 thus has the consequence that the actually used stop frequency increases with increasing temperature.
  • the solution presented here is characterized in that the increase of the stop frequency is achieved in a particularly simple and elegant way.
  • the temperature-dependent behavior of the clock 12 can be achieved without much effort.
  • there is also the possibility of others To take measures to ensure an increase in the stop frequency with increasing temperature.
  • the clock generator 12 is designed to be temperature-stable, for example, so that it supplies a base frequency independent of the temperature.
  • a further analog / digital converter ADC4 is now provided which measures a deliberately temperature-dependent designed internal reference voltage V ref and supplies the temperature information obtained to the logic block 10. This determines based on this temperature information, a suitable stop frequency and takes into account in the manner described above in the transmission of the determined by the comparison block 9 operating frequency to the output block 11. According to the invention increases the determined by the logic block 10 based on the temperature information stop frequency with increasing temperature.
  • digital embodiment of the control or regulating circuit 6 advantageously allows extensive integration of the entire circuit.
  • the integration can be further enhanced by using only a single analog-to-digital converter which operates to time-multiplex the various input signals.
  • the analog / digital converter (s) preferably form digital values with an accuracy of 12 bits, so that a very precise regulation of the intermediate circuit voltage and the lamp power is obtained.
  • ASIC application-specific integrated circuit
  • the solution according to the invention thus ensures reliable operation of the electronic ballast, in which it is ensured that the desired current limit occurs in time to avoid damage.
  • the production costs for the ballast are reduced because no additional adjustment in the production is necessary for the realization of a reliably functioning current limit.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Inverter Devices (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (13)

  1. Ballast électronique pour au moins une lampe à décharge gazeuse (LA), de préférence pour un tube fluorescent, avec circuit redresseur (2) raccordable à une source de tension d'alimentation, un circuit de lissage (3) raccordé à la sortie du circuit redresseur (2) pour générer une tension de circuit intermédiaire (Uz) et un onduleur (4) alimenté en tension de circuit intermédiaire (Uz), à la sortie duquel est raccordé un circuit de charge (5) contenant des raccordements pour la lampe (LA),
    ainsi qu'avec un circuit de commande ou de régulation (6) qui détecte un paramètre de service de l'onduleur (4) ou du circuit de charge (5) correspondant à la puissance de la lampe (LA) et qui fait varier la fréquence de service (frun) de l'onduleur (4) en fonction du paramètre de service détecté, la variation de la fréquence de service (frun) étant limitée vers le bas par une fréquence d'arrêt (fstop),
    caractérisé en ce que
    la fréquence d'arrêt (fstop) dépend de la température et augmente au fur à et mesure que la température augmente à partir d'une fréquence d'arrêt de base (fstop,0).
  2. Ballast électronique selon la revendication 1,
    caractérisé en ce que
    l'onduleur (4) est formé par deux éléments de circuit (S2, S3) commandables, disposés selon un agencement en demi-pont, et en ce que le circuit de commande ou de régulation (6) détecte le courant passant par le demi-pont.
  3. Ballast électronique selon la revendication 2
    caractérisé en ce que
    le circuit de commande ou de régulation (6) détecte la tension relâchée par une résistance (R1) disposée à la base du demi-pont.
  4. Ballast électronique selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) détermine la fréquence de service (frun) pour l'onduleur (4) sur la base d'une comparaison entre le paramètre de service détecté et une valeur de référence.
  5. Ballast électronique selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) détermine une fréquence de service (frun) pour l'onduleur (4) d'abord en fonction du paramètre de service détecté, en ce qu'il compare ensuite la fréquence de service (frun) déterminée avec la fréquence d'arrêt (fstop) et en ce qu'il commande l'onduleur (4) en fonction du résultat de la comparaison soit avec la fréquence de service (frun) déterminée soit avec la fréquence d'arrêt (fstop).
  6. Ballast électronique selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) déduit les signaux de commande pour l'onduleur (4) d'une fréquence de base (fbasis), la fréquence de base (fbasis) augmentant au fur à et mesure que la température augmente.
  7. Ballast électronique selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) détermine la température réellement présente et fixe la fréquence d'arrêt (fstop) sur la base de l'information de température obtenue.
  8. Ballast électronique selon la revendication 7,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) détecte une tension de référence (Vref) dépendante de la température pour déterminer la température.
  9. Ballast électronique selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) comprend un convertisseur analogique/numérique (ADC2) pour convertir le paramètre de service détecté en une valeur numérique comprenant au moins 2 bits, en ce qu'il calcule une fréquence de service (frun) sur la base de cette valeur numérique dans un bloc de calcul numérique (8) pour l'exploitation de l'onduleur (4) et en ce qu'il la communique à un circuit d'attaque (7) qui convertit cette information de commutation en signaux de commande correspondants pour commander l'onduleur (4).
  10. Ballast électronique selon la revendication 9,
    caractérisé en ce que
    le circuit de lissage (3) est constitué par un régulateur de commutation et le circuit de commande ou de régulation (6) détecte au moins un paramètre de service (Uz) du circuit de lissage (3) et commande un commutateur (S1) commandable du régulateur de commutation en fonction de la valeur du paramètre de service détecté (Uz),
    le circuit de commande ou de régulation (6) comprenant au moins un autre convertisseur analogique/numérique (ADC1) pour convertir le paramètre de service détecté (Uz) en une valeur numérique comprenant au moins 2 bits,
    et le circuit de commande ou de régulation (6) calculant une information de commutation sur la base de cette valeur numérique dans un bloc de calcul numérique (8) pour l'exploitation du commutateur (S1) commandable du régulateur de commutation en la communiquant au circuit d'attaque (7) qui convertit cette information de commutation en un signal de commande correspondant pour commander le commutateur (S1).
  11. Ballast électronique selon la revendication 9 ou 10,
    caractérisé en ce que
    la fréquence d'arrêt de base (fstop,0) peut être prédéterminée par une résistance de référence (R2) raccordable au circuit de commande ou de régulation (6), dont la grandeur est déterminée par un convertisseur analogique/numérique (ADC3) prévu dans le circuit de commande ou de régulation (6) qui, après le raccordement d'une source de courant interne (ls), convertit la tension relâchée par la résistance de référence (R2) en une valeur numérique comprenant au moins 2 bits.
  12. Ballast électronique selon l'une quelconque des revendications 9 à 11,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) comprend un seul convertisseur analogique/numérique fonctionnant en mode d'accès multiple par répartition dans le temps pour la conversion du paramètre de service détecté et de la tension relâchée par la résistance de référence (R2).
  13. Ballast électronique selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le circuit de commande ou de régulation (6) est configuré comme un circuit intégré spécifique à l'application.
EP02025345A 2001-12-27 2002-11-13 Ballast électronique avec protection en température Expired - Lifetime EP1324643B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10164242.3A DE10164242B4 (de) 2001-12-27 2001-12-27 Elektronisches Vorschaltgerät mit Strombegrenzung bei Leistungsreglung
DE10164242 2001-12-27

Publications (2)

Publication Number Publication Date
EP1324643A1 EP1324643A1 (fr) 2003-07-02
EP1324643B1 true EP1324643B1 (fr) 2006-03-29

Family

ID=7711040

Family Applications (1)

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EP02025345A Expired - Lifetime EP1324643B1 (fr) 2001-12-27 2002-11-13 Ballast électronique avec protection en température

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Country Link
EP (1) EP1324643B1 (fr)
AT (1) ATE322144T1 (fr)
DE (2) DE10164242B4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051387B4 (de) * 2004-10-21 2019-11-07 Tridonic Gmbh & Co Kg Betriebsgerät für Leuchtmittel, aufweisend einen adaptiven A/D-Wandler
DE102011103638A1 (de) * 2011-06-08 2012-12-13 Tridonic Gmbh & Co. Kg Verfahren zum Betreiben eines elektronischen Vorschaltgeräts für ein Leuchtmittel und elektronisches Vorschaltgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910900A1 (de) * 1989-04-04 1990-10-11 Zumtobel Ag Vorschaltgeraet fuer eine entladungslampe
DE3943350A1 (de) * 1989-12-29 1991-07-04 Zumtobel Ag Verfahren und vorschaltgeraet zum dimmen von leuchtstoffroehren
DE4425890A1 (de) * 1994-07-11 1996-01-18 Priamos Licht Ind & Dienstleis Schaltungsanordnung für den Betrieb einer Entladungslampe
TW266383B (en) * 1994-07-19 1995-12-21 Siemens Ag Method of starting at least one fluorescent lamp by an electronic ballast and the electronic ballast used therefor
DE19536142A1 (de) * 1995-09-20 1997-03-27 Bosch Gmbh Robert Thermisch geschütztes, elektrische Bauelemente enthaltendes Steuergerät
US6337544B1 (en) * 1999-12-14 2002-01-08 Philips Electronics North America Corporation Digital lamp signal processor
DE10013041A1 (de) * 2000-03-17 2001-09-27 Trilux Lenze Gmbh & Co Kg Verfahren und Vorrichtung zum Betrieb einer mit einer Leuchtstofflampe versehenen Leuchte

Also Published As

Publication number Publication date
EP1324643A1 (fr) 2003-07-02
ATE322144T1 (de) 2006-04-15
DE10164242B4 (de) 2014-07-03
DE10164242A1 (de) 2003-07-17
DE50206213D1 (de) 2006-05-18

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