EP0164774B1 - Dispositif de circuit pour régler la tension de l'arc dans des lampes à décharge à haute pression - Google Patents

Dispositif de circuit pour régler la tension de l'arc dans des lampes à décharge à haute pression Download PDF

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Publication number
EP0164774B1
EP0164774B1 EP85200695A EP85200695A EP0164774B1 EP 0164774 B1 EP0164774 B1 EP 0164774B1 EP 85200695 A EP85200695 A EP 85200695A EP 85200695 A EP85200695 A EP 85200695A EP 0164774 B1 EP0164774 B1 EP 0164774B1
Authority
EP
European Patent Office
Prior art keywords
voltage
lamp
dependent
temperature
circuit arrangement
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
Application number
EP85200695A
Other languages
German (de)
English (en)
Other versions
EP0164774A1 (fr
Inventor
Hans-Günther Ganser
Ralf Dr. Schäfer
Hans-Peter Dr. Stormberg
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0164774A1 publication Critical patent/EP0164774A1/fr
Application granted granted Critical
Publication of EP0164774B1 publication Critical patent/EP0164774B1/fr
Expired 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor

Definitions

  • the invention relates to a circuit arrangement for regulating the operating voltage of high-pressure gas discharge lamps to a predetermined nominal value, consisting of a controllable current limiter connected upstream of the lamp and a control circuit controlling the latter, the output signal of which is determined by the difference between a predetermined nominal value which determines the nominal lamp lamp voltage and one of those current lamp voltage dependent actual value is determined.
  • Regulating the lamp burning voltage to a predetermined nominal value should therefore also be understood to mean that the same value of the burning voltage is set for each lamp of one type, when operated with the above circuit arrangement. This is not synonymous with power stabilization, since different power consumption of the individual lamps may be necessary due to manufacturing tolerances to achieve the same lamp operating voltage. For the same reason, it is not possible to only stabilize the lamp current.
  • the invention is therefore based on the object of providing a circuit arrangement for regulating the operating voltage of high-pressure gas discharge lamps, in particular sodium vapor high-pressure gas discharge lamps, which enables precise regulation of the lamp operating voltage to a predetermined nominal value without this resulting in instabilities during lamp operation. Both burning voltages above the nominal value and burning voltages below this nominal value should be regulated.
  • a heating element is connected in parallel with the lamp and is in thermal contact with a temperature-dependent electrical component which generates the actual value voltage which is dependent on the lamp lamp voltage in question.
  • the heating element is more or less heated.
  • the thermal time constant of the lamp i.e. the time between the likewise sudden change in the operating voltage and the subsequent running through of the output value, depending on the lamp type, between several seconds and a few minutes.
  • the thermal time constant of the unit consisting of the heating element and the temperature-dependent electrical component is in the order of magnitude of the thermal time constant of the lamp.
  • a control circuit is used in the circuit arrangement according to the invention, which does not have any electronic integrators, but whose necessary control time constant is achieved by the thermal inertia of the unit consisting of the heating element and the temperature-dependent electrical component.
  • the actual value voltage together with the setpoint voltage becomes a difference ver amplifier system supplied, the output signal controls the controllable current limiter.
  • the temperature-dependent component is preferably connected in series with a further electrical component and with a voltage source and the actual value voltage is tapped at the connection point of the two components. This arrangement is simple and inexpensive to implement.
  • the setpoint voltage is controlled as a function of the ambient temperature. Changes in the ambient temperature can also be compensated for if the further electrical component connected in series with the temperature-dependent component acted upon by the heating element is also temperature-dependent.
  • the temperature-dependent component can be a temperature-dependent resistor (NTC or PTC resistor), a silicon temperature sensor or a Zener diode with a temperature-dependent Zener voltage.
  • NTC temperature-dependent resistor
  • silicon temperature sensors have less variation in the temperature characteristics than temperature-dependent resistors.
  • the Zener diodes mentioned are even more precise than silicon temperature sensors.
  • a and B are input terminals for connection to an AC voltage network of e.g. 220V, 50 Hz.
  • a series circuit consisting of a high-pressure discharge lamp 1 and a controllable current limiter 2 is connected to these input terminals.
  • Parallel to the lamp 1, which is in particular a high-pressure sodium discharge lamp there is a control circuit 3 which is supplied with the lamp lamp voltage at its first input C, D and a predetermined setpoint voltage voltage which determines the nominal lamp lamp voltage and is supplied from a DC voltage source 4 at another input F, G is produced.
  • the control circuit 3 generates a voltage at its output H when the lamp lamp voltage averaged over time deviates from its nominal value. This output voltage is then fed to the controllable current limiter 2, which reduces the lamp power when the lamp lamp voltage is above its nominal value and increases when the lamp voltage is below its nominal value, so that the lamp lamp voltage is always returned to its nominal value.
  • Circuits with choke coils and triacs are suitable as controllable current limiters, e.g. in U.S. Patents 4162429, 3886405 and 4037148.
  • Electronic switching power supplies such as forward or flyback converters, can also be used.
  • the control circuit 3 shown in Fig. 2 will now be described.
  • the lamp voltage at the first input C, D is fed to a heating element 5, which is connected in parallel to the lamp 1 and is in thermal contact with a temperature-dependent resistor 6, in this case an NTC resistor.
  • a temperature-dependent resistor 6 in this case an NTC resistor.
  • Units of this type are commercially available under the name “indirectly heated thermistor” or can be produced in a simple manner from heating resistors and NTC resistors.
  • This arrangement has the advantage of a galvanic separation between the heating resistor 5 connected to the lamp 1 and the NTC resistor 6, as a result of which the control circuit 3 can be set to any potential, which facilitates the activation of the current limiter 2.
  • the time constant T with which the NTC resistor 6 reacts to changes in the lamp voltage applied to the heating resistor 5, can be set in a simple manner between a few seconds and a few minutes by changing the thermal coupling and thus be adapted to the thermal time constant of the lamp 1.
  • the NTC resistor 6 is connected in series with an ohmic resistor 7 and a DC voltage source of, for example, 10 V and thus forms a voltage divider, at the connection point 8 of the two resistors 6 and 7 a voltage dependent on the actual value of the lamp lamp voltage is tapped off.
  • This actual value voltage is then fed to the first input E, of a differential amplifier 9, while a nominal value determining the nominal lamp lamp voltage, which comes from the DC voltage source 4, is applied to its second input E2.
  • the differential amplifier 9 need not be a single amplifier, but can also consist of a suitable combination of several amplifiers. If the lamp voltage exceeds its nominal value, there is a greater heating of the heating resistor 5 and thus of the NTC resistor 6 thermally coupled to it.
  • a disadvantage of the control circuit shown in FIG. 1 is that the voltage divider consisting of the NTC resistor 6 and the ohmic resistor 7 changes even with fluctuations in the ambient temperature, which occurs in particular in the case of ballasts integrated in a lamp base. This disadvantage can be avoided, however, if an NTC resistor whose temperature characteristic matches that of the NTC resistor 6 is also used instead of the ohmic resistor 7. If one then arranges the second NTC resistor (7) far enough from the heating resistor 5, the voltage divider ratio remains constant with changes in the ambient temperature.
  • a silicon temperature sensor e.g. KTY 83 from Valvo
  • Such silicon temperature sensors generally have less variation in temperature characteristics than NTC resistors. Since silicon temperature sensors have a positive temperature coefficient, the inputs E, and E2 of the differential amplifier would have to be exchanged in this case.
  • a series connection of an ohmic resistor 7 and a Zener diode 10 with a temperature-dependent Zener voltage is provided (e.g. TBD0135 from Thomson CSF).
  • the heating resistor 5 increases the heating of the zener diode 10, causing its zener voltage to rise.
  • this leads to an increase in the voltage at input E, of differential amplifier 9.
  • a setpoint voltage supplied to input E2 of the differential amplifier is provided, which depends on the ambient temperature.
  • a further series circuit comprising a Zener diode 11 with a temperature-dependent Zener voltage, an ohmic resistor 12 and a DC voltage source is provided.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (9)

1. Dispositif de circuit pour le réglage de la tension d'arc de lampes à décharge dans le gaz à haute pression à une valeur nominale préalablement déterminée, constitué par un limiteur de courant réglable monté en amont de la lampe ainsi que par un circuit de réglage qui assure le réglage de ce limiteur de courant et dont le signal de sortie est déterminé par la différence entre une tension d'arc nominale préalablement déterminée de la lampe et une valeur réelle dépendant chaque fois de la tension d'arc de la lampe, caractérisé en ce qu'un élément chauffant (5) est monté en parallèle à la lampe (1) et est en contact thermique avec un composant électrique dépendant de la température (6 respectivement 10) et engendrant la tension réelle dépendant chaque fois de la tension d'arc de la lampe.
2. Dispositif de circuit selon la revendication 1, caractérisé en ce que la constante de temps thermique de l'unité constituée par l'élément chauffant (5) et le composant électrique dépendant de la température (6; 10) se situe dans l'ordre de grandeur de la constante de temps thermique de la lampe (1).
3. Dispositif de circuit selon la revendication 1 ou 2, caractérisé en ce que la tension réelle, ensemble avec la tension de valeur nominal est amenée à un amplificateur différentiel (9) dont le signal de sortie assure le réglage du limiteur de courant réglable (2).
4. Dispositif de circuit selon l'une des revendications 1 à 3, caractérisé en ce que le composant dépendant de la température (6; 10) est monté en série avec un autre composant électrique (7) ainsi qu'avec une source de tension et la tension réelle est prélevée sur le noeud (8) des deux composants.
5. Dispositif de circuit selon l'une des revendications 1 à 4, caractérisé en ce que la valeur nominale est réglée en dépendance de la température ambiante.
6. Dispositif de circuit selon la revendication 4, caractérisé en ce que l'autre composant électrique varie également en fonction de la température.
7. Dispositif de circuit selon la revendication 1 à 6, caractérisé en ce que l'élément dépendant de la température est une résistance dépendant de la température (6).
8. Dispositif de circuit selon les revendications 1-6, caractérisé en ce que le composant dépendant de la température est un capteur de température de silicium.
9. Dispositif de circuit selon les revendications 1 à 6, caractérisé en ce que le composant dépendant de la température est une diode Zener (10) présentant une tension Zener que varie en fonction de la température.
EP85200695A 1984-05-14 1985-05-03 Dispositif de circuit pour régler la tension de l'arc dans des lampes à décharge à haute pression Expired EP0164774B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843417794 DE3417794A1 (de) 1984-05-14 1984-05-14 Schaltungsanordnung zur regelung der brennspannung von hochdruckgasentladungslampen
DE3417794 1984-05-14

Publications (2)

Publication Number Publication Date
EP0164774A1 EP0164774A1 (fr) 1985-12-18
EP0164774B1 true EP0164774B1 (fr) 1989-01-18

Family

ID=6235758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200695A Expired EP0164774B1 (fr) 1984-05-14 1985-05-03 Dispositif de circuit pour régler la tension de l'arc dans des lampes à décharge à haute pression

Country Status (6)

Country Link
US (1) US4891563A (fr)
EP (1) EP0164774B1 (fr)
JP (1) JPS60250596A (fr)
CA (1) CA1256935A (fr)
DE (2) DE3417794A1 (fr)
HU (1) HU191780B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4015399A1 (de) * 1990-05-14 1991-11-21 Hella Kg Hueck & Co Schaltungsanordnung fuer einen kraftfahrzeugscheinwerfer
JP3196206B2 (ja) * 1990-09-25 2001-08-06 東芝ライテック株式会社 放電ランプ点灯装置
US5136476A (en) * 1991-05-23 1992-08-04 Horn Donald E Toilet bowl illuminator
US5517089A (en) * 1993-10-28 1996-05-14 Abbott Laboratories Regulated electroluminescent panel power supply
DE69823155T2 (de) * 1997-12-15 2005-03-17 Ceramet Technologies Pte. Ltd. Formbare Zusammensetzung und Verfahren zur Herstellung von Sinterkörpern daraus
US6489879B1 (en) * 1999-12-10 2002-12-03 National Semiconductor Corporation PTC fuse including external heat source
JP6135267B2 (ja) * 2013-04-16 2017-05-31 ソニー株式会社 照明装置、照明システム、及び制御方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284664A (en) * 1959-10-01 1966-11-08 Sylvania Electric Prod Pressure regulation of fluorescent lamps by peltier cooling means
US3591828A (en) * 1968-08-12 1971-07-06 New Nippon Electric Co Discharge lamp device and its operating apparatus
DE1945267B2 (de) * 1969-09-06 1971-11-18 Verfahren zum anschliessen eines lichtmessfuehlers an ein energiesteuergeraet
US3886405A (en) * 1972-02-07 1975-05-27 Mamiya Camera Device for operating discharge lamps
US4039895A (en) * 1975-02-20 1977-08-02 U.S. Philips Corporation Device for starting and feeding a discharge lamp
US4037148A (en) * 1975-08-15 1977-07-19 General Electric Company Ballast control device
FR2379226A1 (fr) * 1977-01-31 1978-08-25 Radiotechnique Compelec Starter electronique d'amorcage d'un tube a decharge
US4162429A (en) * 1977-03-11 1979-07-24 Westinghouse Electric Corp. Ballast circuit for accurately regulating HID lamp wattage
US4253046A (en) * 1978-12-11 1981-02-24 Datapower, Inc. Variable intensity control apparatus for operating a gas discharge lamp
US4162430A (en) * 1978-05-30 1979-07-24 Westinghouse Electric Corp. Compact ballast for fluorescent lamp which provides excellent lamp power regulation
GB2034948B (en) * 1978-11-13 1983-01-06 King G A Monitoring circuits more particularly for monitoring lamp circuits
DE3047289A1 (de) * 1980-12-16 1982-07-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Zuendvorrichtung fuer eine niederdruckentladungslampe
US4475065A (en) * 1982-09-02 1984-10-02 North American Philips Lighting Corporation Method of operating HID sodium lamp to minimize lamp voltage variation throughout lamp life

Also Published As

Publication number Publication date
HU191780B (en) 1987-04-28
CA1256935A (fr) 1989-07-04
DE3417794A1 (de) 1985-11-14
EP0164774A1 (fr) 1985-12-18
DE3567788D1 (en) 1989-02-23
JPS60250596A (ja) 1985-12-11
US4891563A (en) 1990-01-02
HUT38026A (en) 1986-03-28

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