EP1290763B1 - Switching power supply for discharge lamp and method for powering a lamp - Google Patents

Switching power supply for discharge lamp and method for powering a lamp Download PDF

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Publication number
EP1290763B1
EP1290763B1 EP01951532A EP01951532A EP1290763B1 EP 1290763 B1 EP1290763 B1 EP 1290763B1 EP 01951532 A EP01951532 A EP 01951532A EP 01951532 A EP01951532 A EP 01951532A EP 1290763 B1 EP1290763 B1 EP 1290763B1
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EP
European Patent Office
Prior art keywords
lamp
voltage
power supply
startup
light source
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Expired - Lifetime
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EP01951532A
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German (de)
French (fr)
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EP1290763A2 (en
Inventor
Alain Denes
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Lempia-Laboratoire D'electronique Mecanique Pyro
Original Assignee
LEMPIA-LABORATOIRE D'ELECTRONIQUE MECANIQUE PYROTECHNIQUE ET INFORMATIQUE APPLIQUE
LEMPIA LABORATOIRE D ELECTRONI
Lempia-Laboratoire D'electronique Mecanique Pyrotechnique Et Informatique Applique
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Priority claimed from PCT/FR2000/001496 external-priority patent/WO2000076034A1/en
Application filed by LEMPIA-LABORATOIRE D'ELECTRONIQUE MECANIQUE PYROTECHNIQUE ET INFORMATIQUE APPLIQUE, LEMPIA LABORATOIRE D ELECTRONI, Lempia-Laboratoire D'electronique Mecanique Pyrotechnique Et Informatique Applique filed Critical LEMPIA-LABORATOIRE D'ELECTRONIQUE MECANIQUE PYROTECHNIQUE ET INFORMATIQUE APPLIQUE
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/945—Holders with built-in electrical component
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • H05B47/22—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/945—Holders with built-in electrical component
    • H01R33/9453—Holders with built-in electrical component for screw type coupling devices

Definitions

  • the present invention relates to a switching power supply for a discharge lamp and a method of supplying the lamp.
  • This document describes a control circuit of a discharge lamp, comprising a triac and a resonant circuit.
  • This control circuit has the effect of applying to the lamp a series of high voltage peaks, greater than the peak voltage of the AC power supply, thus ensuring the priming of the lamp, and then allows, under the condition of service, to maintain arc discharge voltages through the lamp that can reach the peak voltage of the mains supply.
  • the invention provides a solution to one or more of these problems.
  • the subject of the invention is thus a method for supplying a discharge lamp with a switching power supply, comprising the steps of applying to the lamp a lamp starting voltage, after the initiation of the lamp. lamp, application of a lower operating voltage than the starting voltage
  • the switching power supply comprises a resonant circuit supplying the lamp, the resonant circuit supplying the lamp with the starting voltage when a chopped voltage at a first frequency is applied thereto and supplying the lamp with the operating voltage when a chopped voltage at another frequency is applied to it.
  • the operating voltage is applied to the lamp after a determined time of application of the starting voltage or when a current threshold crossing the lamp is reached or when a threshold of light intensity of the lamp is reached.
  • the invention furthermore relates to a light point comprising a discharge lamp a switching power supply supplying the discharge lamp supplying the discharge lamp selectively with at least one starting voltage and with a lower operating voltage than the starting voltage.
  • the switching power supply comprising a resonant circuit (32) supplying the lamp with the starting voltage when a chopped voltage at a first frequency is applied thereto and supplying the lamp with the operating voltage when a chopped voltage at a first frequency another frequency is applied to it
  • the switching power supply supplies the lamp with the operating voltage after priming.
  • the switched-mode power supply comprises means for determining the end of the ignition according to the duration of application of the starting voltage, as a function of current flowing through the lamp or as a function of the intensity light emitted by the lamp.
  • the resonant circuit is an LC circuit.
  • the switching power supply further comprises voltage chopping means, a transformer powered by the hashing means and having a first output providing the boot voltage, a second output providing the operating voltage, means for selectively applying the boot voltage and the operating voltage to the lamp.
  • the switching power supply further comprises a transmitter / receiver controlling the ignition and / or extinction of the lamp.
  • the switched-mode power supply furthermore comprises a control circuit performing at least one of the following measurements: measurement of the electric current consumed by the lamp, measurement of the outside temperature or of the control circuit, measurement of the external brightness, measurement of the phase difference between current and voltage supplying the lamp, measurement of external vibrations, measurement of external shocks, the control circuit preferably comprising a storage memory of one or more measurements made.
  • the transmitter / receiver transmits the measurements of the control circuit.
  • the control module 18 of the candelabrum may also store in its memory the data thus measured.
  • the control unit can control a switching power supply 19.
  • a first embodiment of the switched-mode power supply is shown in FIG. figure 1 .
  • the input of the switching power supply 19 is connected to a diode bridge D3 for rectifying the current.
  • a smoothing capacitor C9 and a zener diode D8 are connected in parallel to the outputs of the diode bridge D8 to smooth and stabilize the rectified voltage.
  • the rectified voltage possibly smoothed and stabilized, is applied to the primary winding of a transformer Tr1 through a controlled switch D7 for chopping at high frequency the voltage applied to the primary of the transformer Tr1.
  • the controlled switch D7 is in this case a thyristor, but it could also be a power transistor or any other suitable component.
  • the transformer Tr1 has a secondary winding with several outputs each delivering a different voltage.
  • the first three outputs of the winding are each connected, via a respective controlled switch D4, D5, D6, to the output of the switching power supply 19, that is to say to the socket 15 intended to receive the bulb 21.
  • Controlled switches D4, D5, D6 are of a type similar to switch D7.
  • the switching power supply 19 is particularly suitable for supplying a lamp 21 of the electric discharge lamp type, and more particularly of the mercury vapor lamp or sodium vapor lamp type.
  • the input of the switching power supply 19 is supplied, for example by a voltage of 230 V of the network.
  • the switch D7 is switched at a high frequency between about 30 kHz and 90 KHz. In our example, the frequency is 60 KHz.
  • the chopped signal thus obtained is applied to the primary winding of the transformer Tr1.
  • the secondary winding of the transformer Tr1 has a first output - that corresponding to the switch D4 - which delivers a voltage sufficient to cause the priming of the lamp. In our example, this voltage is 600 V.
  • the secondary winding of the transformer Tr1 has a second output - that corresponding to the switch D5 - which delivers a voltage corresponding to the nominal operating voltage of the lamp. In our example, this voltage is 100 V.
  • the secondary winding of the transformer Tr1 may also have a third output - that corresponding to the switch D6 - which delivers a voltage corresponding to a voltage slightly lower than the operating voltage of the lamp, but sufficient to keep the lamp on . In our example, this voltage is 90 V.
  • switch D6 is closed while opening the switch D5 so as to apply the voltage slightly lower than the nominal lamp service voltage.
  • the third output of the secondary winding is optional. On the contrary, it is also possible to have several outputs at the secondary winding each delivering a respective voltage within the nominal operating voltage range of the lamp or service range.
  • the switching power supply 19 is advantageously controlled by the control module 18 to supply or not the bulb 21 and / or to vary the power delivered to the bulb 21.
  • the figure 2 illustrates another embodiment of a switching power supply 19.
  • the logic circuits are powered by voltages of 5V. some are not represented for the sake of clarity.
  • This switching power supply comprises a circuit 31 providing a chopped voltage. This can be done, as in the first embodiment, using an input of the switching power supply 19 connected to a diode bridge D3 for rectifying the current.
  • This diode bridge may for example be connected to a power supply 29 by the sector.
  • the switch can for example be controlled by the control circuit 35 detailed below.
  • the rectified voltage is applied to a resonant circuit 32 by means of controlled switches D7 for chopping at high frequency the voltage applied across the resonant circuit 32.
  • the switches D7 can be controlled by a microcontroller of the type IR2104.
  • the resonant circuit 32 described here is of the LC type. One can of course use any type of adequate resonant circuit.
  • the bulb 21 is connected across the capacitor 33 of the resonant circuit.
  • the frequency response curve of the resonant circuit is used.
  • the figure 3 illustrates an example of a frequency response curve of a resonant circuit that can be used for the supply circuit.
  • a resonant circuit 32 with a capacitor 33 of 20 nF and an inductance 34 of 0.2 mH can be used.
  • those skilled in the art will determine the appropriate components for determined bulb voltages.
  • a voltage is obtained at the terminals of the corresponding capacitor.
  • This type of power supply can also be used with different types of bulbs without having to be changed. All you have to do is modify its settings by modifying, for example, the hash frequencies used.
  • the hashing frequencies can be obtained by using a control circuit 35.
  • This control circuit 35 comprises for example a microcontroller, such as the model PIC18C2X2.
  • This microcontroller is connected on one of its terminals to an oscillator 36.
  • the oscillator 36 may for example selectively provide two pulse frequencies corresponding to the service and boot hash frequencies.
  • the control circuit 35 is preferably connected to the circuit providing the chopped voltage via an optocoupler 39. It is thus possible to galvanically isolate the control circuit of the hash circuit.
  • the circuit providing the chopped voltage actuates the switches D7 at the frequency supplied to it by the control circuit 35.
  • the resonant circuit is first supplied with a chopped voltage at a given frequency to which a starting voltage of the bulbs corresponds.
  • the resonant circuit is supplied at a frequency of about 85 KHz or 75 KHz.
  • the resonant circuit is generally dimensioned so that the resonant peak voltage of the circuit is greater than the starting voltage.
  • the ignition voltage can be maintained for a predetermined time, or maintained until a value is obtained. predetermined current, or maintained until a predetermined light intensity, as previously described.
  • the frequency of the ground voltage of the bulb is then changed.
  • a chopping frequency is then used to obtain a service voltage at the terminals of the bulb. This operating voltage is lower than the starting voltage.
  • the resonant circuit is powered at a frequency of 25 KHz or 145 KHz.
  • a chopping frequency of the order of 150 kHz can be used to limit the flickering or fluttering of the bulb.
  • a boot chopping frequency and a service boot frequency are used on the same side of the resonance peak.
  • a start frequency of 85KHz in combination with a 145KHz operating frequency or a 75KHz start frequency in combination with a 25KHz operating frequency will be used.
  • the switching time between the starting voltage and the operating voltage is thus reduced.
  • a transition between initiation and service at a frequency providing a peak resonance voltage is also avoided.
  • the life of the bulb is thus increased.
  • the service light intensity can be varied by using a service hash frequency range. We can then use different hash frequencies in this range. For example, it is possible to reduce the power consumed by the bulb, which proportionally increases the life of this bulb. You can also change the hash frequency to change the color emitted by the bulb. For example, it is possible to switch between a first service frequency and a second service frequency to change the illumination color. With such a power supply, two illumination colors can be obtained for a given light intensity.
  • control loop 38 for regulating the current of the bulb.
  • a feedback loop for example, by introducing the measured current and by slaving it to a reference current.
  • Current adjustment can be achieved by changing the hash frequency.
  • a luxmeter to achieve control at a desired light intensity.
  • the luxmeter can be placed at a sufficient distance from the bulb to also take into account the surrounding light intensity. This regulation makes it possible for example to eliminate the fluctuations of the power supply by the sector. The life of the lamp and the bulb is thus considerably increased.
  • a component of the LST6NP type can be used for the control loop 38.
  • This circuit can for example send an error signal on a pin of the microcontroller 37, in case the hash frequency comes out of a determined frequency range.
  • the microcontroller can then require oscillator 36 a corrected oscillation frequency.
  • a compensation circuit 41 cos ⁇ It is also possible to integrate in the switching power supply a compensation circuit 41 cos ⁇ . This can be done using cos ⁇ compensation circuits known per se, such as the Motorola MC33262.
  • the power supply generally has intrinsically a cos ⁇ much lower than 1, because of the use of coils and capacitors.
  • a compensation circuit makes it possible to bring the cos ⁇ of the power supply closer to a value of 1. The power supply of the lamp can thus respond to different legislations concerning disturbances and harmonics of the current.
  • the cos ⁇ compensation circuit is connected to the rectified voltage terminals of the rectifier circuit D3.
  • the cos ⁇ compensation circuit can perform a measurement of the shape of the rectified current via a transformer 43. Depending on the shape of the measured current, the cos ⁇ compensation circuit, actuates the switch 44 to smooth the current.
  • the cos ⁇ compensation circuit may also include a shunt 42 for measuring the current consumed by the bulb.
  • transductance error amplifier in the cos ⁇ compensation circuit.
  • This circuit is connected to a quadrant single multiplier circuit so as to form a compensation loop.
  • An overvoltage comparator can be incorporated into the amplifier to eliminate voltage spikes when the lamp is turned on or when the load is removed. This also limits the production of electric arcs on the lamp and the disturbances on the feedback loop.
  • the cos ⁇ compensation circuit 41 can be connected to the hashing circuit 31 via a diode D10. The compensation circuit of cos ⁇ is thus protected from any malfunction of the hash circuit.
  • the candelabrum control unit comprises means for measuring the electric current consumed by the lamp
  • the restarting of the lamp is manual or requires a command sent to a candelabrum control module for example by a supervisory station.
  • the communication with the supervision station can for example be effected by means of a transmitter / receiver 17 integrated in the pull-out socket or in the candelabrum.
  • the candelabrum or the pull-out socket may comprise a shock or vibration sensor 44.
  • the sensor can be connected to the control unit.
  • the control unit can then be set to interrupt the power supply of the bulb when a shock or vibration exceeding a predetermined threshold are detected. It is for example possible to interrupt the lamp momentarily during the passage of vehicles generating significant vibrations. It can thus increase the life of the lamp and the socket.
  • the shock or vibration sensor is known per se. These functions can be implemented in a manner known per se. It is best to connect the bulb socket or the switching power supply to the lamp housing via one or more appropriate silent-blocks or dampers. The bulb is thus better insulated from any external vibrations. It is then preferable to mount the vibration sensor 44 at the damped zone of the lamp, for example inside the control circuit 35 or at another suitable place in the switching power supply 19.
  • Ancillary circuits such as shock detection or intensity measurement, can also be connected to a microcontroller of the control unit by means of galvanic isolation opto-couplers.
  • the supply circuit of the candelabrum can be powered by a cabinet.
  • the opening / closing of the supply circuit by the cabinet can be done according to the ambient light or according to internal time programs.
  • a control module of the cabinet can also be provided, for example to store in its memory the data determined by operating sensors, such as intensity sensors or shocks.
  • switching power supply 19 is not necessarily placed inside a socket trundle. It could be housed for example directly in the candelabrum.
  • socket bush 10 particularly suitable for use in a previously described candelabra.
  • the pull-out socket 10 comprises a housing 11 closed by a cover 12.
  • a male socket 13 with screw - similar to a lamp base - is arranged in the bottom 11a of the housing 11 and projects out of the housing 11.
  • the male socket 13 is adapted to be connected in a female socket 20 equipping a candelabrum 1a.
  • the lid 12 is snapped onto the housing 11. It can also be glued to ensure a complete seal.
  • a printed circuit 14a is arranged inside the housing.
  • the sleeve 13 is electrically connected to the printed circuit 14a.
  • a second printed circuit 14b is arranged in the housing 11 between the cover 12 and the printed circuit 14a.
  • a female screw socket 15 is arranged in the cover 12.
  • the printed circuit 14b comprises lamellae 16 adapted to ensure electrical contact with a corresponding bulb 21 when it is screwed into the socket 15.
  • the pull-out socket 10 is adapted to be mounted in the conventional socket of a candelabrum which usually directly receives the bulb which is now received by the female socket 15 of the socket bush 10.
  • the bushings 13 and 15 can be of any suitable type, other than screw.
  • the figure 4 proposes a socket trundle in which the male socket 13 is replaced by a terminal block 13a placed on the outer face of the bottom 11a of the housing 11 and a threaded rod 13b also arranged on the outer face of the bottom 11a to allow the attachment of the socket trundle 10 using a nut.
  • the candelabrum control unit comprises means for measuring the electric current consumed by the lamp
  • the restarting of the lamp is manual or requires a command sent to the control module of the candelabrum by the supervision station.
  • the transmitter / receiver 17 and the control module 18 are powered by the socket 13 when the socket 10 is mounted in a corresponding socket 20 of a candelabrum or the like which is electrically powered.
  • the switching power supply 19 receives its energy from the socket 13 and its outputs are connected to the lamellae 16 to supply the bulb 21 when it is placed in the socket 15.
  • a housing 11 with a diameter of 60 mm and a depth of 50 mm may be sufficient to receive all the aforementioned components.
  • the radio transmitter / receiver 17 is replaced by a carrier current transmitter / receiver.
  • switches D4, D5 and D6 are controlled by the control module 18.
  • the secondary winding of the transformer may advantageously also have an additional low voltage output - for example 12 volts - for supplying, via a rectifying and filtering circuit 22, the transmitter / receiver 17 and the control module 18 and possibly still other electronic circuits.
  • switching power supply 19 is a module independent of the other elements housed in the pull-out socket.
  • switching power supply 19 may be used for supplying a discharge lamp independently of transmitter / receiver 17. It is thus possible to produce a socket that does not include a transmitter / receiver 17, but including a switching power supply of the type 19 with a specific control module for controlling the different switches D4 to D7.
  • a socket trundle may be used especially in the case where it is not desired to remotely control the lamp.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

The invention concerns a method for powering a discharge lamp with a switching power supply. Said method is characterised in that it consists in: applying a voltage firing the lamp, then after the lamp has been energized, applying a lower service voltage to the firing voltage. The firing and service voltages can be generated by using a resonant circuit at the terminals of which a chopped voltage is applied with different frequencies. The invention also concerns a light source comprising a discharge lamp and a switching power supply. Said light source can be equipped with devices for measuring several parameters, such as power, light intensity or the amplitude of vibrations. The invention is useful for producing public lighting.

Description

La présente invention concerne une alimentation à découpage pour une lampe à décharge et un procédé d'alimentation de la lampe.The present invention relates to a switching power supply for a discharge lamp and a method of supplying the lamp.

A l'heure d'aujourd'hui, il n'existe pas de solution simple, efficace et économique pour commander l'amorçage et gérer l'allumage d'une lampe à décharge, notamment une lampe de candélabre.At the present time, there is no simple, effective and economical solution for controlling the priming and managing the ignition of a discharge lamp, including a candelabra lamp.

Il est notamment connu du document GB 1 287 149 un procédé selon le préambule de la revendication 1 et un point lumineux selon le préambule de la revendication 3. Ce document décrit un circuit de commande d'une lampe à décharge, comprenant un triac et un circuit résonnant. Ce circuit de commande a pour effet d'appliquer à la lampe une série de pics de tension élevée, supérieure à la tension de crête de l'alimentation en courant alternatif, assurant ainsi l'amorçage de la lampe, puis permet, en condition de service, de maintenir des tensions de décharge d'arcs à travers la lampe pouvant atteindre la tension de crête de l'alimentation secteur.It is notably known from the document GB 1,287,149 a method according to the preamble of claim 1 and a light spot according to the preamble of claim 3. This document describes a control circuit of a discharge lamp, comprising a triac and a resonant circuit. This control circuit has the effect of applying to the lamp a series of high voltage peaks, greater than the peak voltage of the AC power supply, thus ensuring the priming of the lamp, and then allows, under the condition of service, to maintain arc discharge voltages through the lamp that can reach the peak voltage of the mains supply.

L'invention apporte une solution à un ou plusieurs de ces problèmes. L'invention a ainsi pour objet un procédé d'alimentation d'une lampe à décharge par une alimentation à découpage, comprenant les étapes d'application à la lampe d'une tension d'amorçage de la lampe, après l'amorçage de la lampe, d'application d'une tension de service inférieure à la tension d'amorçageThe invention provides a solution to one or more of these problems. The subject of the invention is thus a method for supplying a discharge lamp with a switching power supply, comprising the steps of applying to the lamp a lamp starting voltage, after the initiation of the lamp. lamp, application of a lower operating voltage than the starting voltage

dans lequel l'alimentation à découpage comprend un circuit résonant alimentant la lampe, le circuit résonant fournissant à la lampe la tension d'amorçage lorsqu'une tension hachée à une première fréquence lui est appliquée et fournissant à la lampe la tension de service lorsqu'une tension hachée à une autre fréquence lui est appliquée.wherein the switching power supply comprises a resonant circuit supplying the lamp, the resonant circuit supplying the lamp with the starting voltage when a chopped voltage at a first frequency is applied thereto and supplying the lamp with the operating voltage when a chopped voltage at another frequency is applied to it.

Selon encore une variante, la tension de service est appliquée à la lampe après un temps déterminé d'application de la tension d'amorçage ou lorsqu'un seuil de courant traversant la lampe est atteint ou lorsqu'un seuil d'intensité lumineuse de la lampe est atteint.According to another variant, the operating voltage is applied to the lamp after a determined time of application of the starting voltage or when a current threshold crossing the lamp is reached or when a threshold of light intensity of the lamp is reached.

L'invention concerne en outre un point lumineux comprenant une lampe à décharge une alimentation à découpage alimentant la lampe à décharge alimentant la lampe à décharge sélectivement avec au moins une tension d'amorçage et avec une tension de service inférieure à la tension d'amorçage, l'alimentation à découpage comprenant un circuit résonant (32) fournissant à la lampe la tension d'amorçage lorsqu'une tension hachée à une première fréquence lui est appliquée et fournissant à la lampe la tension de service lorsqu'une tension hachée à une autre fréquence lui est appliquéeThe invention furthermore relates to a light point comprising a discharge lamp a switching power supply supplying the discharge lamp supplying the discharge lamp selectively with at least one starting voltage and with a lower operating voltage than the starting voltage. , the switching power supply comprising a resonant circuit (32) supplying the lamp with the starting voltage when a chopped voltage at a first frequency is applied thereto and supplying the lamp with the operating voltage when a chopped voltage at a first frequency another frequency is applied to it

Selon encore une variante, l'alimentation à découpage alimente la lampe avec la tension de service après l'amorçage.According to another variant, the switching power supply supplies the lamp with the operating voltage after priming.

Selon une autre variante, l'alimentation à découpage comprend des moyens pour déterminer la fin de l'amorçage en fonction de la durée d'application de la tension d'amorçage, en fonction de courant traversant la lampe ou en fonction de l'intensité lumineuse émise par la lampe.According to another variant, the switched-mode power supply comprises means for determining the end of the ignition according to the duration of application of the starting voltage, as a function of current flowing through the lamp or as a function of the intensity light emitted by the lamp.

Selon encore une autre variante, le circuit résonant est un circuit LC.According to yet another variant, the resonant circuit is an LC circuit.

On peut en outre prévoir un point lumineux dans lequel l'alimentation à découpage comprend en outre des moyens de hachage de tension, un transformateur alimenté par les moyens de hachage et présentant une première sortie fournissant la tension d'amorçage, une deuxième sortie fournissant la tension de service, des moyens pour appliquer sélectivement la tension d'amorçage et la tension de service à la lampe.It is also possible to provide a light point in which the switching power supply further comprises voltage chopping means, a transformer powered by the hashing means and having a first output providing the boot voltage, a second output providing the operating voltage, means for selectively applying the boot voltage and the operating voltage to the lamp.

Selon une variante, l'alimentation à découpage comprend en outre un émetteur/récepteur commandant l'allumage et/ou l'extinction de la lampe.Alternatively, the switching power supply further comprises a transmitter / receiver controlling the ignition and / or extinction of the lamp.

Selon encore une variante, l'alimentation à découpage comprend en outre un circuit de contrôle effectuant au moins l'une des mesures suivantes : mesure du courant électrique consommé par la lampe, mesure de la température extérieure ou du circuit de contrôle, mesure de la luminosité extérieure, mesure du déphasage entre courant et tension alimentant la lampe, mesure des vibrations extérieures, mesure des chocs extérieurs, le circuit de contrôle comprenant de préférence une mémoire de stockage d'une ou plusieurs mesures effectuées.According to another variant, the switched-mode power supply furthermore comprises a control circuit performing at least one of the following measurements: measurement of the electric current consumed by the lamp, measurement of the outside temperature or of the control circuit, measurement of the external brightness, measurement of the phase difference between current and voltage supplying the lamp, measurement of external vibrations, measurement of external shocks, the control circuit preferably comprising a storage memory of one or more measurements made.

Selon encore une autre variante, l'émetteur/ récepteur transmet les mesures du circuit de contrôle.According to yet another variant, the transmitter / receiver transmits the measurements of the control circuit.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit d'un mode de réalisation préféré de l'invention, donnée à titre d'exemple et en référence aux dessins annexés.

  • La figure 1 représente un schéma électronique d'une douille gigogne de candélabre selon un premier mode de réalisation de l'invention ;
  • La figure 2 illustre un schéma électronique d'un autre mode de réalisation d'une douille gigogne selon un aspect de l'invention ;
  • La figure 3 illustre la courbe de réponse en fréquence d'un circuit résonnant de l'exemple de la figure 2 ;
  • La figure 4 illustre une douille gigogne en coupe ;
  • La figure 5 illustre une variante d'une douille gigogne en coupe.
  • La figure 1 illustre une douille gigogne 10 de candélabre 1 selon un premier mode de réalisation de l'invention. Le candélabre comprend une ampoule 21 du type lampe à décharge électrique. Cette ampoule est connectée sur une douille 15. Les électrodes de cette douille 15 sont connectées à une unité de contrôle 18.
Other features and advantages of the invention will appear on reading the following description of a preferred embodiment of the invention, given by way of example and with reference to the accompanying drawings.
  • The figure 1 represents an electronic diagram of a candelabrum socket according to a first embodiment of the invention;
  • The figure 2 illustrates an electronic scheme of another embodiment of a pull-out socket according to one aspect of the invention;
  • The figure 3 illustrates the frequency response curve of a resonant circuit of the example of the figure 2 ;
  • The figure 4 illustrates a pull-out sleeve in section;
  • The figure 5 illustrates a variant of a pull-out sleeve in section.
  • The figure 1 illustrates a pull-out socket 10 of candelabrum 1 according to a first embodiment of the invention. The candelabrum comprises a bulb 21 of the electric discharge lamp type. This bulb is connected to a socket 15. The electrodes of this socket 15 are connected to a control unit 18.

L'unité ou module de contrôle 18 de candélabre peut notamment remplir une ou plusieurs des fonctions suivantes :

  • commander l'allumage ou l'extinction de la lampe du candélabre 1 ;
  • gérer l'amorçage de la lampe ;
  • varier la puissance d'alimentation délivrée à la lampe ;
  • mesurer le courant électrique consommé par la lampe ;
  • déterminer le déphasage entre le courant et la tension (cos φ) ;
  • compenser le déphasage entre le courant et la tension (cos φ) ;
  • mesurer la luminosité au niveau de la lampe ;
  • mesurer la température extérieure ou à l'intérieur du module électronique.
The candelabrum control unit or module 18 can notably fulfill one or more of the following functions:
  • to control the lighting or extinguishing of the lamp of candelabrum 1;
  • manage the priming of the lamp;
  • vary the power supply supplied to the lamp;
  • measure the electrical current consumed by the lamp;
  • determine the phase shift between the current and the voltage (cos φ);
  • compensate the phase difference between the current and the voltage (cos φ);
  • measure the brightness at the lamp level;
  • measure the outside temperature or inside the electronic module.

Ces fonctions peuvent être mises en oeuvre de façon connue en soi.These functions can be implemented in a manner known per se.

Le module de contrôle 18 du candélabre pourra également stocker dans sa mémoire les données ainsi mesurées.The control module 18 of the candelabrum may also store in its memory the data thus measured.

L'unité de contrôle peut commander une alimentation à découpage 19. Un premier mode de réalisation de l'alimentation à découpage est représenté à la figure 1. L'entrée de l'alimentation à découpage 19 est connectée à un pont de diode D3 pour redresser le courant. De préférence, un condensateur de lissage C9 et une diode zener D8 sont branchés en parallèles sur les sorties du pont de diode D8 pour lisser et stabiliser la tension redressée. La tension redressée, éventuellement lissée et stabilisée, est appliquée à l'enroulement primaire d'un transformateur Tr1 par l'intermédiaire d'un interrupteur commandé D7 pour hacher à fréquence élevée la tension appliquée au primaire du transformateur Tr1. L'interrupteur commandé D7 est en l'occurrence un thyristor, mais ce pourrait également être un transistor de puissance ou toute autre composant adapté. Le transformateur Tr1 présente un enroulement secondaire à plusieurs sorties délivrant chacune une tension différente. Les trois premières sorties de l'enroulement sont chacune branchées, via un interrupteur commandé respectif D4, D5, D6, à la sortie de l'alimentation à découpage 19, c'est-à-dire à la douille 15 destinée à recevoir l'ampoule 21. Les interrupteurs commandés D4, D5, D6 sont d'un type similaire à l'interrupteur D7.The control unit can control a switching power supply 19. A first embodiment of the switched-mode power supply is shown in FIG. figure 1 . The input of the switching power supply 19 is connected to a diode bridge D3 for rectifying the current. Preferably, a smoothing capacitor C9 and a zener diode D8 are connected in parallel to the outputs of the diode bridge D8 to smooth and stabilize the rectified voltage. The rectified voltage, possibly smoothed and stabilized, is applied to the primary winding of a transformer Tr1 through a controlled switch D7 for chopping at high frequency the voltage applied to the primary of the transformer Tr1. The controlled switch D7 is in this case a thyristor, but it could also be a power transistor or any other suitable component. The transformer Tr1 has a secondary winding with several outputs each delivering a different voltage. The first three outputs of the winding are each connected, via a respective controlled switch D4, D5, D6, to the output of the switching power supply 19, that is to say to the socket 15 intended to receive the bulb 21. Controlled switches D4, D5, D6 are of a type similar to switch D7.

L'alimentation à découpage 19 est particulièrement adaptée pour alimenter une ampoule 21 du type lampe à décharge électrique, et plus particulièrement, du type lampe à vapeur de mercure ou à vapeur de sodium.The switching power supply 19 is particularly suitable for supplying a lamp 21 of the electric discharge lamp type, and more particularly of the mercury vapor lamp or sodium vapor lamp type.

Pour cela, l'entrée de l'alimentation à découpage 19 est alimentée, par exemple par une tension de 230 V du réseau. L'interrupteur D7 est commuté à une fréquence élevée comprise entre environ 30 kHz et 90 KHz. Dans notre exemple, la fréquence est de 60 KHz. Le signal haché ainsi obtenu est appliqué à l'enroulement primaire du transformateur Tr1.For this, the input of the switching power supply 19 is supplied, for example by a voltage of 230 V of the network. The switch D7 is switched at a high frequency between about 30 kHz and 90 KHz. In our example, the frequency is 60 KHz. The chopped signal thus obtained is applied to the primary winding of the transformer Tr1.

L'enroulement secondaire du transformateur Tr1 présente une première sortie - celle correspondant à l'interrupteur D4 - qui délivre une tension suffisante pour provoquer l'amorçage de la lampe. Dans notre exemple, cette tension est de 600 V.The secondary winding of the transformer Tr1 has a first output - that corresponding to the switch D4 - which delivers a voltage sufficient to cause the priming of the lamp. In our example, this voltage is 600 V.

L'enroulement secondaire du transformateur Tr1 présente une deuxième sortie - celle correspondant à l'interrupteur D5 - qui délivre une tension correspondant à la tension nominale de service de la lampe. Dans notre exemple, cette tension est de 100 V.The secondary winding of the transformer Tr1 has a second output - that corresponding to the switch D5 - which delivers a voltage corresponding to the nominal operating voltage of the lamp. In our example, this voltage is 100 V.

L'enroulement secondaire du transformateur Tr1 peut présenter en outre une troisième sortie - celle correspondant à l'interrupteur D6 - qui délivre une tension correspondant à une tension un peu inférieure à la tension de service de la lampe, mais suffisante pour conserver la lampe allumée. Dans notre exemple, cette tension est de 90 V.The secondary winding of the transformer Tr1 may also have a third output - that corresponding to the switch D6 - which delivers a voltage corresponding to a voltage slightly lower than the operating voltage of the lamp, but sufficient to keep the lamp on . In our example, this voltage is 90 V.

Pour amorcer la lampe, on ferme l'interrupteur D4 et on maintient ouvert les interrupteurs D5 et D6. Lorsque la lampe est amorcée, on ferme l'interrupteur D5 alors qu'on ouvre l'interrupteur D4 de sorte à appliquer la tension nominale de service à la lampe. Plusieurs méthodes peuvent être utilisées pour déterminer que la lampe est amorcée :

  • soit par l'écoulement d'un temps fixe depuis le début de l'application de la tension d'amorçage - c'est-à-dire depuis la fermeture de l'interrupteur D4 ;
  • soit en fonction du courant consommé par la lampe qui peut être déterminé par un circuit de mesure du courant classique à partir duquel le module de contrôle 18 peut commander les interrupteurs D4 et D5 ;
  • soit en fonction de la luminosité détectée par un luxmètre. On peut par exemple placer un luxmètre à proximité de l'ampoule pour déterminer l'intensité lumineuse émise par la lampe. Le module de contrôle peut par exemple déterminer que l'amorçage est terminé au-delà d'un certain seuil de luminosité.
To prime the lamp, switch D4 is closed and switches D5 and D6 are kept open. When the lamp is primed, the D5 switch is closed while opens switch D4 to apply the nominal operating voltage to the lamp. Several methods can be used to determine that the lamp is primed:
  • either by the flow of a fixed time since the beginning of the application of the ignition voltage - that is to say since the closing of the switch D4;
  • depending on the current consumed by the lamp which can be determined by a conventional current measurement circuit from which the control module 18 can control the switches D4 and D5;
  • depending on the brightness detected by a luxmeter. For example, a luxmeter can be placed near the bulb to determine the light intensity emitted by the lamp. The control module may for example determine that the boot is completed beyond a certain brightness threshold.

S'il est souhaité de diminuer la luminosité produite par la lampe, on ferme l'interrupteur D6 alors qu'on ouvre l'interrupteur D5 de sorte à appliquer la tension un peu inférieure à la tension nominale de service à la lampe.If it is desired to reduce the brightness produced by the lamp, switch D6 is closed while opening the switch D5 so as to apply the voltage slightly lower than the nominal lamp service voltage.

L'homme du métier comprendra que la troisième sortie de l'enroulement secondaire est facultative. Au contraire, il est également possible d'avoir plusieurs sorties à l'enroulement secondaire délivrant chacune une tension respective située dans la plage de tension de fonctionnement nominal de la lampe ou plage de service.Those skilled in the art will understand that the third output of the secondary winding is optional. On the contrary, it is also possible to have several outputs at the secondary winding each delivering a respective voltage within the nominal operating voltage range of the lamp or service range.

L'alimentation à découpage 19 est avantageusement commandée par le module de contrôle 18 pour alimenter ou non l'ampoule 21 et/ou pour faire varier la puissance délivrée à l'ampoule 21.The switching power supply 19 is advantageously controlled by the control module 18 to supply or not the bulb 21 and / or to vary the power delivered to the bulb 21.

L'utilisation d'une alimentation à découpage pour alimenter une lampe à décharge a plusieurs avantages :

  • elle permet de se passer des accessoires de la lampe que sont l'amorceur et le ballast utilisés actuellement et qui présentent un poids et un volume plus important par rapport à l'alimentation à découpage ;
  • une alimentation à découpage peut être placée dans une douille gigogne, détaillée par la suite, alors que l'amorceur et le ballast du type existant est trop volumineux et lourd ;
  • les fronts raides de tension fournis par l'alimentation à découpage facilitent l'amorçage de la lampe ;
  • la fréquence de découpage élevée évite le scintillement de la lampe.
The use of a switching power supply to power a discharge lamp has several advantages:
  • it makes it possible to dispense with the accessories of the lamp which are the initiator and the ballast currently used and which have a weight and a larger volume compared to the switching power supply;
  • a switching power supply can be placed in a pull-out socket, detailed subsequently, while the initiator and the ballast of the existing type is too bulky and heavy;
  • the steep voltage edges provided by the switching power supply facilitate the priming of the lamp;
  • the high switching frequency prevents flickering of the lamp.

La figure 2 illustre un autre mode de réalisation d'une alimentation à découpage 19. De façon générale et connue en soi, les circuits logique sont alimentés par des tensions de 5V. certaines ne sont pas représentées dans un souci de clarté. Cette alimentation à découpage comprend un circuit 31 fournissant une tension hachée. On peut pour cela, comme dans le premier mode de réalisation, utiliser une entrée de l'alimentation à découpage 19 connectée à un pont de diode D3 pour redresser le courant. Ce pont de diode peut par exemple être connectée à une alimentation 29 par le secteur. On peut utiliser un interrupteur général 30 pour établir ou interrompre l'alimentation générale de l'ampoule 21. L'interrupteur peut par exemple être commandée par le circuit de commande 35 détaillé par la suite. On peut également brancher un condensateur de lissage C9 et une diode zener D8 en parallèles sur les sorties du pont de diode D8 pour lisser et stabiliser la tension redressée.The figure 2 illustrates another embodiment of a switching power supply 19. Generally and known per se, the logic circuits are powered by voltages of 5V. some are not represented for the sake of clarity. This switching power supply comprises a circuit 31 providing a chopped voltage. This can be done, as in the first embodiment, using an input of the switching power supply 19 connected to a diode bridge D3 for rectifying the current. This diode bridge may for example be connected to a power supply 29 by the sector. It is possible to use a general switch 30 to establish or interrupt the general power supply of the bulb 21. The switch can for example be controlled by the control circuit 35 detailed below. It is also possible to connect a smoothing capacitor C9 and a zener diode D8 in parallel to the outputs of the diode bridge D8 to smooth and stabilize the rectified voltage.

La tension redressée, éventuellement lissée et stabilisée, est appliquée à un circuit résonnant 32 par l'intermédiaire d'interrupteurs commandés D7 pour hacher à fréquence élevée la tension appliquée aux bornes du circuit résonnant 32. Les interrupteurs D7 peuvent être commandés par un microcontrôleur du type IR2104. Le circuit résonnant 32 décrit ici est du type LC. On peut bien entendu utiliser tout type de circuit résonnant adéquat. L'ampoule 21 est connectée aux bornes du condensateur 33 du circuit résonnant.The rectified voltage, optionally smoothed and stabilized, is applied to a resonant circuit 32 by means of controlled switches D7 for chopping at high frequency the voltage applied across the resonant circuit 32. The switches D7 can be controlled by a microcontroller of the type IR2104. The resonant circuit 32 described here is of the LC type. One can of course use any type of adequate resonant circuit. The bulb 21 is connected across the capacitor 33 of the resonant circuit.

Pour alimenter l'ampoule à la tension adéquate en fonction de sa phase de fonctionnement -amorçage ou service-, on utilise la courbe de réponse en fréquence du circuit résonnant. La figure 3 illustre un exemple de courbe de réponse en fréquence d'un circuit résonnant utilisable pour le circuit d'alimentation. On peut par exemple utiliser un circuit résonnant 32 avec un condensateur 33 de 20 nF et une inductance 34 de 0,2 mH. De façon générale, l'homme de métier déterminera les composants adéquats pour des tensions d'ampoule déterminées. Pour une fréquence de hachage donnée à l'entrée du circuit résonnant, on obtient une tension aux bornes du condensateur correspondante. Ce type d'alimentation peut en outre être utilisée avec différents types d'ampoules sans devoir être changé. Il suffit alors de modifier ses réglages en modifiant par exemple les fréquences de hachage utilisées.To supply the bulb with the appropriate voltage according to its phase of operation -booting or service-, the frequency response curve of the resonant circuit is used. The figure 3 illustrates an example of a frequency response curve of a resonant circuit that can be used for the supply circuit. For example, a resonant circuit 32 with a capacitor 33 of 20 nF and an inductance 34 of 0.2 mH can be used. In general, those skilled in the art will determine the appropriate components for determined bulb voltages. For a given hash frequency at the input of the resonant circuit, a voltage is obtained at the terminals of the corresponding capacitor. This type of power supply can also be used with different types of bulbs without having to be changed. All you have to do is modify its settings by modifying, for example, the hash frequencies used.

Les fréquences de hachage peuvent être obtenues en utilisant un circuit de commande 35. Ce circuit de commande 35 comprend par exemple un microcontrôleur, tel que le modèle PIC18C2X2. Ce microcontrôleur est connecté sur une de ses bornes à un oscillateur 36. L'oscillateur 36 peut par exemple fournir sélectivement deux fréquences d'impulsions correspondant aux fréquences de hachage de service et d'amorçage.The hashing frequencies can be obtained by using a control circuit 35. This control circuit 35 comprises for example a microcontroller, such as the model PIC18C2X2. This microcontroller is connected on one of its terminals to an oscillator 36. The oscillator 36 may for example selectively provide two pulse frequencies corresponding to the service and boot hash frequencies.

Le circuit de commande 35 est de préférence connecté au circuit fournissant la tension hachée par l'intermédiaire d'un optocoupleur 39. On peut ainsi isoler galvaniquement le circuit de commande du circuit de hachage. Le circuit fournissant la tension hachée actionne les interrupteurs D7 à la fréquence qui lui est fournie par le circuit de commande 35.The control circuit 35 is preferably connected to the circuit providing the chopped voltage via an optocoupler 39. It is thus possible to galvanically isolate the control circuit of the hash circuit. The circuit providing the chopped voltage actuates the switches D7 at the frequency supplied to it by the control circuit 35.

Selon un procédé d'alimentation de l'ampoule, on alimente dans un premier temps le circuit résonnant avec une tension hachée à une fréquence donnée à laquelle correspond une tension d'amorçage de l'ampoules. Dans l'exemple de la figure 3, pour obtenir la tension d'amorçage de 3000V, le circuit résonnant est alimenté à une fréquence d'environ 85 KHz ou 75 KHz. On dimensionne de façon générale le circuit résonnant de sorte que la tension du pic de résonance du circuit soit supérieure à la tension d'amorçage. Dans l'exemple de la figure, on a un pic de résonance de 6000V à une fréquence de 80KHz. La tension d'amorçage peut être maintenue pendant un temps prédéterminé, ou maintenue jusqu'à l'obtention d'une valeur de courant prédéterminée, ou encore maintenue jusqu'à l'obtention d'une intensité lumineuse prédéterminée, comme cela a été décrit précédemment.According to a method of supplying the ampoule, the resonant circuit is first supplied with a chopped voltage at a given frequency to which a starting voltage of the bulbs corresponds. In the example of the figure 3 to obtain the ignition voltage of 3000V, the resonant circuit is supplied at a frequency of about 85 KHz or 75 KHz. The resonant circuit is generally dimensioned so that the resonant peak voltage of the circuit is greater than the starting voltage. In the example of the figure, there is a resonance peak of 6000V at a frequency of 80KHz. The ignition voltage can be maintained for a predetermined time, or maintained until a value is obtained. predetermined current, or maintained until a predetermined light intensity, as previously described.

La fréquence de la tension hachée d'alimentation de l'ampoule est ensuite changée. On utilise alors une fréquence de hachage permettant d'obtenir une tension de service aux bornes de l'ampoule. Cette tension de service est inférieure à la tension d'amorçage. Dans l'exemple de la figure 3, pour obtenir une tension de service d'environ 500 V, le circuit résonnant est alimenté à une fréquence de 25 KHz ou 145KHz. On peut utiliser une fréquence de hachage de l'ordre de 150KHz pour limiter le scintillement ou le papillonnement de l'ampoule.The frequency of the ground voltage of the bulb is then changed. A chopping frequency is then used to obtain a service voltage at the terminals of the bulb. This operating voltage is lower than the starting voltage. In the example of the figure 3 in order to obtain an operating voltage of approximately 500 V, the resonant circuit is powered at a frequency of 25 KHz or 145 KHz. A chopping frequency of the order of 150 kHz can be used to limit the flickering or fluttering of the bulb.

On utilise de préférence une fréquence de hachage d'amorçage et une fréquence d'amorçage de service disposées d'un même côté du pic de résonance. Dans l'exemple de la figure 3, on utilisera ainsi une fréquence d'amorçage de 85KHz en combinaison avec une fréquence de service de 145KHz ou une fréquence d'amorçage de 75KHz en combinaison avec une fréquence de service de 25KHz. Le temps de commutation entre la tension d'amorçage et la tension de service est ainsi réduit. On évite également une transition entre l'amorçage et le service à une fréquence fournissant une tension de pic de résonance. La durée de vie de l'ampoule est ainsi accrue.Preferably, a boot chopping frequency and a service boot frequency are used on the same side of the resonance peak. In the example of the figure 3 thus, a start frequency of 85KHz in combination with a 145KHz operating frequency or a 75KHz start frequency in combination with a 25KHz operating frequency will be used. The switching time between the starting voltage and the operating voltage is thus reduced. A transition between initiation and service at a frequency providing a peak resonance voltage is also avoided. The life of the bulb is thus increased.

On peut bien entendu faire varier l'intensité lumineuse de service en utilisant une plage de fréquence de hachage de service. On peut alors utiliser différentes fréquences de hachage dans cette plage. On peut par exemple diminuer la puissance consommée par l'ampoule, ce qui augmente proportionnellement la durée de vie de cette ampoule. On peut également modifier la fréquence de hachage pour modifier la couleur émise par l'ampoule. On peut par exemple commuter entre une première fréquence de service et une deuxième fréquence de service pour modifier la couleur d'illumination. Avec une telle alimentation, on peut obtenir deux couleurs d'illumination pour une intensité lumineuse donnée.Of course, the service light intensity can be varied by using a service hash frequency range. We can then use different hash frequencies in this range. For example, it is possible to reduce the power consumed by the bulb, which proportionally increases the life of this bulb. You can also change the hash frequency to change the color emitted by the bulb. For example, it is possible to switch between a first service frequency and a second service frequency to change the illumination color. With such a power supply, two illumination colors can be obtained for a given light intensity.

Il est possible de prévoir une boucle de contrôle 38 pour réaliser la régulation du courant de l'ampoule. On peut pour cela utiliser par exemple une boucle de contre-réaction en introduisant le courant mesuré et en l'asservissant à un courant de consigne. L'ajustement du courant peut être réalisé en modifiant la fréquence de hachage. On peut également utiliser un luxmètre pour réaliser un asservissement à une intensité lumineuse de consigne. On peut par exemple disposer le luxmètre à une distance suffisante de l'ampoule pour prendre également en compte l'intensité lumineuse environnante. Cette régulation permet par exemple d'éliminer les fluctuations de l'alimentation par le secteur. La durée de vie de la lampe et de l'ampoule est ainsi considérablement accrue. On peut utiliser un composant du type LST6NP pour la boucle de contrôle 38.It is possible to provide a control loop 38 for regulating the current of the bulb. For this purpose, it is possible to use a feedback loop, for example, by introducing the measured current and by slaving it to a reference current. Current adjustment can be achieved by changing the hash frequency. It is also possible to use a luxmeter to achieve control at a desired light intensity. For example, the luxmeter can be placed at a sufficient distance from the bulb to also take into account the surrounding light intensity. This regulation makes it possible for example to eliminate the fluctuations of the power supply by the sector. The life of the lamp and the bulb is thus considerably increased. A component of the LST6NP type can be used for the control loop 38.

Il est également possible de contrôler des erreurs de fréquences de hachage. On peut par exemple utiliser un circuit 40, reliant le circuit de hachage 31 au circuit de commande 35. Ce circuit peut par exemple envoyer un signal d'erreur sur une broche du microcontrôleur 37, au cas où la fréquence de hachage sort d'une plage de fréquence déterminée. Le microcontrôleur peut alors requérir de l'oscillateur 36 une fréquence d'oscillation corrigée.It is also possible to control hash frequency errors. One can for example use a circuit 40, connecting the hashing circuit 31 to the control circuit 35. This circuit can for example send an error signal on a pin of the microcontroller 37, in case the hash frequency comes out of a determined frequency range. The microcontroller can then require oscillator 36 a corrected oscillation frequency.

On peut également prévoir d'intégrer dans l'alimentation à découpage un circuit 41 de compensation de cos φ. On peut pour cela utiliser des circuits de compensation de cos φ connus en soi, tels que le Motorola MC33262. L'alimentation présente généralement intrinsèquement un cos φ très inférieur à 1, du fait de l'utilisation de bobines et de condensateurs. Un circuit de compensation permet de rapprocher le cos φ de l'alimentation d'une valeur de 1. l'alimentation de la lampe peut ainsi répondre à différentes législations concernant les perturbations et les harmoniques du courant.It is also possible to integrate in the switching power supply a compensation circuit 41 cos φ. This can be done using cos φ compensation circuits known per se, such as the Motorola MC33262. The power supply generally has intrinsically a cos φ much lower than 1, because of the use of coils and capacitors. A compensation circuit makes it possible to bring the cos φ of the power supply closer to a value of 1. The power supply of the lamp can thus respond to different legislations concerning disturbances and harmonics of the current.

Le circuit de compensation de cos φ est connecté sur les bornes de tension redressée du circuit redresseur D3. Le circuit de compensation de cos φ peut réaliser une mesure de la forme du courant redressé par l'intermédiaire d'un transformateur 43. En fonction de la forme du courant mesurée, le circuit de compensation de cos φ, actionne l'interrupteur 44 pour lisser le courant. Le circuit de compensation de cos φ peut également comprendre un shunt 42 pour mesurer le courant consommé par l'ampoule. Bien que le circuit de compensation de cos φ décrit précédemment soit du type actif, on peut bien entendu utiliser un circuit de compensation passif.The cos φ compensation circuit is connected to the rectified voltage terminals of the rectifier circuit D3. The cos φ compensation circuit can perform a measurement of the shape of the rectified current via a transformer 43. Depending on the shape of the measured current, the cos φ compensation circuit, actuates the switch 44 to smooth the current. The cosφ compensation circuit may also include a shunt 42 for measuring the current consumed by the bulb. Although the cosφ compensation circuit described above is of the active type, it is of course possible to use a passive compensation circuit.

Afin d'obtenir une tension hachée constante indépendamment des cycles de la tension du secteur, il est possible d'utiliser un amplificateur d'erreur de transductance dans le circuit de compensation de cos φ. Ce circuit est connecté à un circuit multiplicateur simple quadrant de sorte à former une boucle de compensation. On peut incorporer un comparateur de surtension dans l'amplificateur pour éliminer des pics de tension lors de la mise en route de la lampe ou lors de la suppression de la charge. On limite ainsi également la production d'arcs électriques sur la lampe ainsi que les perturbations sur la boucle de contre-réaction.In order to obtain a constant chopped voltage independently of the cycles of the mains voltage, it is possible to use a transductance error amplifier in the cos φ compensation circuit. This circuit is connected to a quadrant single multiplier circuit so as to form a compensation loop. An overvoltage comparator can be incorporated into the amplifier to eliminate voltage spikes when the lamp is turned on or when the load is removed. This also limits the production of electric arcs on the lamp and the disturbances on the feedback loop.

Le circuit 41 de compensation de cos φ peut être connecté au circuit de hachage 31 par l'intermédiaire d'une diode D10. Le circuit de compensation de cos φ est ainsi protégé d'éventuels disfonctionnement du circuit de hachage.The cos φ compensation circuit 41 can be connected to the hashing circuit 31 via a diode D10. The compensation circuit of cos φ is thus protected from any malfunction of the hash circuit.

Dans le cas où l'unité de contrôle de candélabre comprend des moyens pour mesurer le courant électrique consommé par la lampe, elle pourra avantageusement couper l'alimentation de la lampe du candélabre 1 en cas de surintensité mesurée pour sécuriser le candélabre. Dans ce cas, il est préférable que la remise en route de la lampe soit manuelle ou nécessite une commande envoyée à un module de contrôle du candélabre par exemple par un poste de supervision. La communication avec le poste de supervision peut par exemple s'effectuer au moyen d'un émetteur/récepteur 17 intégré dans la douille gigogne ou dans le candélabre.In the case where the candelabrum control unit comprises means for measuring the electric current consumed by the lamp, it may advantageously cut off the power supply of the candelabrum lamp 1 in case of measured overcurrent to secure the candelabrum. In this case, it is preferable that the restarting of the lamp is manual or requires a command sent to a candelabrum control module for example by a supervisory station. The communication with the supervision station can for example be effected by means of a transmitter / receiver 17 integrated in the pull-out socket or in the candelabrum.

Le candélabre ou la douille gigogne peuvent comprendre un capteur 44 de choc ou de vibration. Le capteur peut être connecté à l'unité de contrôle. L'unité de contrôle peut alors être paramétrée pour interrompre l'alimentation de l'ampoule lorsqu'un choc ou des vibrations dépassant un seuil prédéterminé sont détectés. Il est par exemple possible d'interrompre momentanément la lampe lors du passage de véhicules engendrant d'importantes vibrations. On peut ainsi augmenter la durée de vie de la lampe et de la douille. Le capteur de choc ou de vibrations est connu en soi. Ces fonctions peuvent être mises en oeuvre de façon connue en soi. Il est préférable de relier la douille de l'ampoule ou l'alimentation à découpage au boîtier de la lampe par l'intermédiaire d'un ou plusieurs silent-blocs ou amortisseurs appropriés. L'ampoule est ainsi mieux isolée d'éventuelles vibrations extérieures. Il est alors préférable de monter le capteur de vibrations 44 au niveau de la zone amortie de la lampe, par exemple à l'intérieur du circuit de commande 35 ou à un autre endroit approprié dans l'alimentation à découpage 19.The candelabrum or the pull-out socket may comprise a shock or vibration sensor 44. The sensor can be connected to the control unit. The control unit can then be set to interrupt the power supply of the bulb when a shock or vibration exceeding a predetermined threshold are detected. It is for example possible to interrupt the lamp momentarily during the passage of vehicles generating significant vibrations. It can thus increase the life of the lamp and the socket. The shock or vibration sensor is known per se. These functions can be implemented in a manner known per se. It is best to connect the bulb socket or the switching power supply to the lamp housing via one or more appropriate silent-blocks or dampers. The bulb is thus better insulated from any external vibrations. It is then preferable to mount the vibration sensor 44 at the damped zone of the lamp, for example inside the control circuit 35 or at another suitable place in the switching power supply 19.

Des circuits annexes, tels que la détection de choc ou la mesure d'intensité, peuvent en outre être reliés à un microcontrôleur de l'unité de contrôle au moyen d'opto-coupleurs d'isolement galvanique.Ancillary circuits, such as shock detection or intensity measurement, can also be connected to a microcontroller of the control unit by means of galvanic isolation opto-couplers.

Le circuit d'alimentation du candélabre peut être alimenté par une armoire. L'ouverture/fermeture du circuit d'alimentation par l'armoire peut se faire suivant la luminosité ambiante ou suivant des programmes horaires internes. Un module de contrôle de l'armoire peut également être prévu, par exemple pour stocker dans sa mémoire les données déterminées par des capteurs de fonctionnement, tels que les capteurs d'intensité ou de chocs.The supply circuit of the candelabrum can be powered by a cabinet. The opening / closing of the supply circuit by the cabinet can be done according to the ambient light or according to internal time programs. A control module of the cabinet can also be provided, for example to store in its memory the data determined by operating sensors, such as intensity sensors or shocks.

Enfin, il est évident qu'une telle alimentation à découpage 19 n'est pas nécessairement placée à l'intérieur d'une douille gigogne. Elle pourrait être logée par exemple directement dans le candélabre.Finally, it is obvious that such a switching power supply 19 is not necessarily placed inside a socket trundle. It could be housed for example directly in the candelabrum.

En relation avec la figure 4, nous allons maintenant décrire une douille gigogne 10 particulièrement adaptée pour son utilisation dans un candélabre précédemment décrit.In relation to the figure 4 , we will now describe a socket bush 10 particularly suitable for use in a previously described candelabra.

La douille gigogne 10 comprend un boîtier 11 fermé par un couvercle 12. Une douille mâle 13 à vis - similaire à un culot de lampe - est agencée dans le fond 11a du boîtier 11 et fait saillie hors du boîtier 11. La douille mâle 13 est apte à être connectée dans une douille femelle 20 équipant un candélabre 1a. Le couvercle 12 tient par enclipsage sur le boîtier 11. Il peut en outre être collé pour assurer une étanchéité complète.The pull-out socket 10 comprises a housing 11 closed by a cover 12. A male socket 13 with screw - similar to a lamp base - is arranged in the bottom 11a of the housing 11 and projects out of the housing 11. The male socket 13 is adapted to be connected in a female socket 20 equipping a candelabrum 1a. The lid 12 is snapped onto the housing 11. It can also be glued to ensure a complete seal.

Un circuit imprimé 14a est agencé à l'intérieur du boîtier. La douille 13 est reliée électriquement au circuit imprimé 14a. Un deuxième circuit imprimé 14b est agencé dans le boîtier 11 entre le couvercle 12 et le circuit imprimé 14a. Une douille femelle 15 à vis est agencée dans le couvercle 12. Le circuit imprimé 14b comprend des lamelles 16 aptes à assurer le contact électrique avec une ampoule 21 correspondante lorsque celle-ci est vissée dans la douille 15.A printed circuit 14a is arranged inside the housing. The sleeve 13 is electrically connected to the printed circuit 14a. A second printed circuit 14b is arranged in the housing 11 between the cover 12 and the printed circuit 14a. A female screw socket 15 is arranged in the cover 12. The printed circuit 14b comprises lamellae 16 adapted to ensure electrical contact with a corresponding bulb 21 when it is screwed into the socket 15.

En conséquence, la douille gigogne 10 est apte à être montée dans la douille femelle classique d'un candélabre qui habituellement reçoit directement l'ampoule qui est maintenant reçue par la douille femelle 15 de la douille gigogne 10. Bien évidemment, las douilles 13 et 15 peuvent être de tout type adapté, autre qu'à vis. En variante, la figure 4 propose une douille gigogne dans laquelle la douille mâle 13 est remplacée par un bornier de connexion 13a placé sur la face extérieure du fond 11a du boîtier 11 et par une tige filetée 13b également agencée sur la face extérieure du fond 11a pour permettre la fixation de la douille gigogne 10 à l'aide d'un écrou.Accordingly, the pull-out socket 10 is adapted to be mounted in the conventional socket of a candelabrum which usually directly receives the bulb which is now received by the female socket 15 of the socket bush 10. Of course, the bushings 13 and 15 can be of any suitable type, other than screw. Alternatively, the figure 4 proposes a socket trundle in which the male socket 13 is replaced by a terminal block 13a placed on the outer face of the bottom 11a of the housing 11 and a threaded rod 13b also arranged on the outer face of the bottom 11a to allow the attachment of the socket trundle 10 using a nut.

Les deux circuits imprimés 14a et 14b sont en liaison électrique l'un avec l'autre et comportent les circuits électroniques suivants, tels qu'illustrés par la figure 5 :

  • un émetteur/récepteur radiofréquence 17 ;
  • un module de contrôle électronique à microprocesseur 18 ;
  • une alimentation à découpage 19.
The two printed circuits 14a and 14b are in electrical connection with each other and comprise the following electronic circuits, as illustrated by the figure 5 :
  • a radiofrequency transceiver 17;
  • an electronic microprocessor control module 18;
  • switching power supply 19.

L'émetteur/récepteur 17 est interfacé avec le module de contrôle 18 qui gère les communications de l'émetteur/récepteur 17. L'émetteur/récepteur 17 et le module de contrôle 18 sont connus en soi. En particulier, le module de contrôle 18 pourra comprendre une mémoire du type EEPROM pour stocker un numéro d'identification servant à l'adressage dans un réseau de candélabres. Il pourra aussi comprendre une cellule photosensible 18a agencée par exemple dans un orifice réalisé sur le couvercle ou dans une paroi latérale du boîtier 11 pour mesurer la luminosité extérieure au boîtier. Plus généralement, nous rappelons que le module de contrôle 18 pourra inclure une unité de contrôle de candélabre pouvant notamment remplir une ou plusieurs des fonctions suivantes :

  • commander l'allumage ou l'extinction de la lampe montée dans la douille 15 de la douille gigogne 10 elle-même montée sur un candélabre 1a ou similaire ;
  • gérer l'amorçage de cette lampe ;
  • varier la puissance d'alimentation délivrée à cette lampe ;
  • mesurer le courant électrique consommé par cette lampe ;
  • déterminer le déphasage entre le courant et la tension (cos φ) ;
  • compenser le déphasage entre le courant et la tension (cos φ);
  • mesurer la température extérieure ou à l'intérieur du module électronique.
The transmitter / receiver 17 is interfaced with the control module 18 which manages the communications of the transmitter / receiver 17. The transmitter / receiver 17 and the control module 18 are known per se. In particular, the control module 18 may include an EEPROM type memory for storing an identification number for addressing in a network of candelabra. It may also include a photosensitive cell 18a arranged for example in an orifice formed on the cover or in a side wall of the housing 11 for measuring the brightness outside the housing. More generally, we recall that the control module 18 may include a candelabrum control unit that can notably fulfill one or more of the following functions:
  • control the switching on or off of the lamp mounted in the socket 15 of the socket bush 10 itself mounted on a candelabrum 1a or the like;
  • manage the priming of this lamp;
  • vary the power supply supplied to this lamp;
  • measure the electric current consumed by this lamp;
  • determine the phase shift between the current and the voltage (cos φ);
  • compensate the phase difference between the current and the voltage (cos φ);
  • measure the outside temperature or inside the electronic module.

Ces fonctions peuvent être mises en oeuvre de façon connue en soi.These functions can be implemented in a manner known per se.

Dans le cas où l'unité de contrôle de candélabre comprend des moyens pour mesurer le courant électrique consommé par la lampe, elle pourra avantageusement couper l'alimentation de la lampe du candélabre 1 en cas de surintensité mesurée pour sécuriser le candélabre. Dans ce cas, il est préférable que la remise en route de la lampe soit manuelle ou nécessite une commande envoyée au module de contrôle du candélabre par le poste de supervision.In the case where the candelabrum control unit comprises means for measuring the electric current consumed by the lamp, it may advantageously cut off the power supply of the candelabrum lamp 1 in case of measured overcurrent to secure the candelabrum. In this case, it is preferable that the restarting of the lamp is manual or requires a command sent to the control module of the candelabrum by the supervision station.

L'émetteur/récepteur 17 et le module de contrôle 18 sont alimentés en énergie par le biais de la douille 13 lorsque la douille gigogne 10 est montée dans une douille femelle 20 correspondante d'un candélabre ou similaire qui est alimentée électriquement.The transmitter / receiver 17 and the control module 18 are powered by the socket 13 when the socket 10 is mounted in a corresponding socket 20 of a candelabrum or the like which is electrically powered.

De manière similaire, l'alimentation à découpage 19 reçoit son énergie depuis la douille 13 et ses sorties sont reliées aux lamelles 16 pour alimenter l'ampoule 21 lorsqu'elle est placée dans la douille 15.Similarly, the switching power supply 19 receives its energy from the socket 13 and its outputs are connected to the lamellae 16 to supply the bulb 21 when it is placed in the socket 15.

A titre d'exemple, un boîtier 11 de diamètre 60 mm et de profondeur 50 mm peut suffire pour recevoir l'ensemble des composants susmentionnés.For example, a housing 11 with a diameter of 60 mm and a depth of 50 mm may be sufficient to receive all the aforementioned components.

Dans un autre mode de réalisation, l'émetteur/récepteur radio 17 est remplacé par un émetteur/récepteur à courant porteur.In another embodiment, the radio transmitter / receiver 17 is replaced by a carrier current transmitter / receiver.

Il suffit de monter une douille gigogne 10 selon l'invention sur un candélabre la au lieu et place de l'ampoule 21 habituelle. Autrement dit, la douille mâle 13 de la douille gigogne 10 est montée dans la douille femelle 20 du candélabre la qui reçoit habituellement l'ampoule 21, cette dernière étant montée dorénavant dans la douille femelle 15 de la douille gigogne 10.It suffices to mount a pull-out socket 10 according to the invention on a candelabrum la instead of and instead of the usual bulb 21. In other words, the male socket 13 of the socket bush 10 is mounted in the socket bush 20 of the candelabrum la which usually receives the bulb 21, the latter being now mounted in the female socket 15 of the pull-out socket 10.

Pour éteindre la lampe, il suffit par exemple dans le premier mode de réalisation d'ouvrir les interrupteurs D4, D5 et D6. Une autre possibilité consiste à maintenir ouvert l'interrupteur D7. Les interrupteurs D4, D5, D6 et D7 sont commandés par le module de contrôle 18.To turn off the lamp, it suffices for example in the first embodiment to open the switches D4, D5 and D6. Another possibility is to keep the D7 switch open. The switches D4, D5, D6 and D7 are controlled by the control module 18.

L'enroulement secondaire du transformateur peut encore avoir avantageusement une sortie supplémentaire basse tension - par exemple de 12 Volts - pour alimenter par le biais d'un circuit 22 de redressement et filtrage, l'émetteur/récepteur 17 et le module de contrôle 18 et éventuellement encore d'autres circuits électronique.The secondary winding of the transformer may advantageously also have an additional low voltage output - for example 12 volts - for supplying, via a rectifying and filtering circuit 22, the transmitter / receiver 17 and the control module 18 and possibly still other electronic circuits.

L'homme du métier comprendra que l'alimentation à découpage 19 est un module indépendant des autres éléments logés dans la douille gigogne. Notamment, l'alimentation à découpage 19 peut être utilisée pour l'alimentation d'une lampe à décharge indépendamment de l'émetteur/récepteur 17. Il est ainsi possible de réaliser une douille gigogne ne comprenant pas d'émetteur/récepteur 17, mais incluant une alimentation à découpage du type 19 avec un module de commande spécifique pour commander les différents interrupteurs D4 à D7. Une telle douille gigogne pourra être utilisée notamment dans le cas où il n'est pas souhaité commander à distance la lampe.Those skilled in the art will understand that the switching power supply 19 is a module independent of the other elements housed in the pull-out socket. In particular, switching power supply 19 may be used for supplying a discharge lamp independently of transmitter / receiver 17. It is thus possible to produce a socket that does not include a transmitter / receiver 17, but including a switching power supply of the type 19 with a specific control module for controlling the different switches D4 to D7. Such a socket trundle may be used especially in the case where it is not desired to remotely control the lamp.

Il est également possible de lui adjoindre seulement un récepteur à la place d'un émetteur/récepteur pour permettre la commande à distance de la lampe, mais pas de rapatrier des données relatives aux conditions de fonctionnement.It is also possible to add only a receiver instead of a transmitter / receiver to allow remote control of the lamp, but not to repatriate data relating to the operating conditions.

Bien entendu, la présente invention n'est pas limitée aux exemples et au mode de réalisation décrits et représentés, mais elle est susceptible de nombreuses variantes accessibles à l'homme de l'art.Of course, the present invention is not limited to the examples and to the embodiment described and shown, but it is capable of numerous variants accessible to those skilled in the art.

Claims (10)

  1. A method for powering a discharge lamp (21) with a switch mode power supply (19), comprising the steps:
    - of applying a lamp startup voltage to the lamp; and
    - after starting the lamp, of applying a service voltage lower than the startup voltage, in which:
    - the switch mode power supply (19) comprises a resonant circuit (32) supplying the lamp; characterized in that
    - the resonant circuit provides the startup voltage to the lamp when a voltage chopped at a first frequency is applied thereto and provides the service voltage to the lamp when a voltage chopped at another frequency is applied thereto.
  2. The power supply method as claimed in claim 1, in which the service voltage is applied to the lamp after a specific duration of startup voltage application or when a threshold of current flowing through the lamp is reached or when a threshold of light intensity of the lamp is reached.
  3. A light source (1) comprising:
    - a discharge lamp (21); and
    - a switch mode power supply (19) supplying the discharge lamp selectively with at least one startup voltage and with a service voltage lower than the startup voltage, characterized in that the chopping power supply comprises a resonant circuit (32) providing the startup voltage to the lamp when a voltage chopped at a first frequency is applied thereto and providing the service voltage to the lamp when a voltage chopped at another frequency is applied thereto.
  4. The light source of claim 3, in which the switch mode power supply supplies the lamp with the service voltage after startup.
  5. The light source of claim 4, in which the switch mode power supply comprises means (38) for determining the end of the startup as a function of the duration of startup voltage application, as a function of the current flowing through the lamp or as a function of the light intensity emitted by the lamp.
  6. The light source of any one of claims 3 to 5, in which the resonant circuit (32) is an LC circuit.
  7. The light source of any one of claims 3 to 6, in which the switch mode power supply further comprises:
    - voltage chopping means (D7);
    - a transformer (Tr1) supplied by the chopping means and having:
    - a first output providing the startup voltage;
    - a second output supplying the service voltage;
    - means (18, D4, D5, D6) for selectively applying the startup voltage and the service voltage to the lamp.
  8. The light source of any one of claims 3 to 7, in which the switch mode power supply further comprises a transceiver (17) controlling the ignition/extinction of the lamp.
  9. The light source as claimed in any one of claims 3 to 8, in which the switch mode power supply further comprises a control circuit (18) carrying out at least one of the following measurements:
    - measurement of the electric current consumed by the lamp;
    - measurement of the external temperature or of the control circuit;
    - measurement of the external brightness;
    - measurement of the phase shift between current and voltage supplying the lamp;
    - measurement of external vibration;
    - measurement of external shock;
    the control circuit preferably comprising a memory for storing one or more of the measurements carried out.
  10. The light source of claims 8 and 9, in which the transceiver transmits the measurements from the control circuit.
EP01951532A 2000-05-30 2001-05-30 Switching power supply for discharge lamp and method for powering a lamp Expired - Lifetime EP1290763B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
WOPCT/FR00/01496 2000-05-30
PCT/FR2000/001496 WO2000076034A1 (en) 1999-06-08 2000-05-30 Network for remote administration of street lighting inter alia and methods to carry out said administration
PCT/EP2001/006136 WO2001093379A1 (en) 2000-05-30 2001-05-30 Switching power supply for discharge lamp and method for powering a lamp

Publications (2)

Publication Number Publication Date
EP1290763A2 EP1290763A2 (en) 2003-03-12
EP1290763B1 true EP1290763B1 (en) 2008-12-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01951532A Expired - Lifetime EP1290763B1 (en) 2000-05-30 2001-05-30 Switching power supply for discharge lamp and method for powering a lamp

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EP (1) EP1290763B1 (en)
AT (1) ATE419664T1 (en)
AU (1) AU2001272434A1 (en)
DE (1) DE60137220D1 (en)
WO (1) WO2001093379A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2430275A (en) * 2005-09-15 2007-03-21 Tyco Electronics Electronic control gear for monitoring and controlling lamps

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837332A (en) * 1971-10-21 1974-09-24 Madison College Foundation Inc Voice-operated gas lamp stroboscopes
US4523128A (en) * 1982-12-10 1985-06-11 Honeywell Inc. Remote control of dimmable electronic gas discharge lamp ballasts
US5075599A (en) * 1989-11-29 1991-12-24 U.S. Philips Corporation Circuit arrangement
US5834908A (en) * 1991-05-20 1998-11-10 Bhk, Inc. Instant-on vapor lamp and operation thereof
US5485057A (en) * 1993-09-02 1996-01-16 Smallwood; Robert C. Gas discharge lamp and power distribution system therefor
EP0889675A1 (en) * 1997-07-02 1999-01-07 MAGNETEK S.p.A. Electronic ballast with lamp tyre recognition

Also Published As

Publication number Publication date
DE60137220D1 (en) 2009-02-12
AU2001272434A1 (en) 2001-12-11
WO2001093379A1 (en) 2001-12-06
WO2001093379A8 (en) 2002-03-21
EP1290763A2 (en) 2003-03-12
ATE419664T1 (en) 2009-01-15

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