EP0066754A1 - Appareil électronique pour connecter une lampe à décharge au réseau - Google Patents

Appareil électronique pour connecter une lampe à décharge au réseau Download PDF

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Publication number
EP0066754A1
EP0066754A1 EP82104449A EP82104449A EP0066754A1 EP 0066754 A1 EP0066754 A1 EP 0066754A1 EP 82104449 A EP82104449 A EP 82104449A EP 82104449 A EP82104449 A EP 82104449A EP 0066754 A1 EP0066754 A1 EP 0066754A1
Authority
EP
European Patent Office
Prior art keywords
lamp
current
connection device
mains connection
inverter circuit
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.)
Granted
Application number
EP82104449A
Other languages
German (de)
English (en)
Other versions
EP0066754B1 (fr
Inventor
Martti Sairanen
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.)
Helvar Oy AB
Original Assignee
Helvar Oy AB
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Filing date
Publication date
Application filed by Helvar Oy AB filed Critical Helvar Oy AB
Publication of EP0066754A1 publication Critical patent/EP0066754A1/fr
Application granted granted Critical
Publication of EP0066754B1 publication Critical patent/EP0066754B1/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
    • H05B41/26—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
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2926—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions

Definitions

  • the present invention relates to an electronic mains connection device for a gas-discharge lamp, acting as a stabilizing current limiting element and comprising an inverter circuit which from rectified mains current or some other direct current converts the service current for a lamp to such a high frequency that the impedance of a discharge lamp is like normal resistance.
  • the invention relates to an inverter circuit embodied by means of semi-conductors and applied in a mains connection device of gas-discharge lamps for feeding current to the lamp.
  • gas-discharge lamps refers to lamps generally used for lighting and whose internal impedance in normal alternating current service of 50 or 60 Hz is characteristically negative resistance and which thus require a gas-discharge stabilizing current limiting element.
  • Such lamps comprise-fluorescence lamps, low-pressure and high-pressure sodium lamps, mercury vapour lamps and halogen lamps.
  • the advantages gained include improved light efficiency due to increased service frequency, reduction of the mechanical size of necessary electromagnetic components and thereby reduction of the connection device's own power loss as well as reduction of the weight of a connection device.
  • An obvious advantage is also that it is generally easy to combine the control of a lamp's illumination level with an electronically effected connection device solution.
  • an electronic connection device In most circuit solutions for an electronic connection device, it is easy to develop sufficient voltage for the ignition of a discharge lamp without a separate igniter. Furthermore, an electronic connection device does not produce sound disturbances providing that service frequency is selected from above the hearing range. It is possible to eliminate a disturbing flicker from the light emitted by the lamp. An electronic connection device can also be effected, so that the curve of a current taken up by the apparatus from the alternating mains is nearly sine-shaped and its power factor is cos ⁇ 1, whereby separate components for the compensation of the mains current are not required.
  • the prior art embodiments of an electronic connection device generally include some lamp current limiting impedance; a choke, a capacitor, a resistor or a combination thereof connected in series with a lamp and a source of supply voltage (e.g. DOS publication No. 2 550 550).
  • the present invention is also based on a circuit solution capable of operating discharge lamps at the above- mentioned relatively high frequencies on which a discharge lamp behaves as normal resistance.
  • a circuit solution according to the invention differs from the prior art solutions in that it does not require any inductive or capacitive member for the stabilization of a lamp's gas-discharge.
  • a discharge lamp can be operated by connecting it by means of inverter switches directly to a source of supply voltage by reversing the polarity of a lamp on each half-cycle.
  • the switching frequency must then be so high that a discharge lamp behaves as a resistance.
  • a gas-discharge lamp 1 is connected to a source of direct current by way of four electronic switches 3-6 in a manner that these switches make up an inverter circuit by means of which the polarity of supply voltage at the terminals of lamp 1 is reversed at a high frequency which is within the range of circa 1 kHz ... 150 kHz.
  • This reversal of polarity is effected in a manner that, with switches 3 and 4 closed, switches 5 and 6 are open and when the latter switches are closed, the former switches are opened.
  • connection device of the invention is not provided with any current limiting impedance element but, instead, the current is only limited by means of the lamp's 1 own resistance-like impedance at said high inverting frequency.
  • the invention provides a feed-back control, wherein a current transformer 7 or some other current measuring means, such as a resistor, is used to sense the current of lamp 1 and, on the basis of this current rate, a control unit 8 controls the open times and/or operating frequency of the inverter circuit switches 3-6 in a manner that the current of lamp 1 remains constant.
  • a current transformer 7 or some other current measuring means such as a resistor
  • a lamp 1 is connected to an inverter circuit and to a source of direct current by means of an economy transformer 9 which increases the supply voltage of lamp 1 with respect to the voltage of a current source.
  • An economy transformer 9 can be further used for glowing the cathodes of lamp 1 to improve the ignitability of the lamp.
  • an economy transformer 9 can serve to create an ignition voltage peak sufficient for the ignition of lamp 1.
  • Fig. 3 differs from that of Fig. 1 in that switches 6 and 4 are replaced by capacitors 10 in order to simplify the circuit. This is a suitable approach in the applications in which the temperature limitation set by the capacitors is of no significance.
  • switches 3 and 6,of the circuit solution shown in Fig. 1 are replaced by an economy transformer 11, one of the terminals of a current source being connected to its central outlet.
  • the magnetizing inductance of an economy transformer 11 can be conventionally employed for creating an ignition voltage peak for lamp 1.
  • a resistor 16 is used for measuring a current passing through the lamp in the other direction which measuring method, as for the operation of the device, replaces the measuring effected in other embodiments by means of a current transformer.
  • Fig. 5 illustrates a further developed embodiment corresponding to Fig. 3, comprising parallel to a lamp 1 an ignition voltage peak creating inductance 13 and parallel to that an overvoltage protector 14.
  • a current transformer 7 senses a current passing through lamp 1, said current rate being passed through a rectifying circuit 15 to a control unit 8.
  • a control unit 8 issues control pulses for the control electrodes of transistors serving as switches 3 and 5, the duration and/or operating frequency of said control pulses changing as necessary for maintaining the current passing through lamp 1 constant.
  • said control unit 8 is provided with a regulator 12 capable of having effect on the opening times of switch transistors 3 and 5 or on their inverting frequency.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
EP19820104449 1981-06-08 1982-05-21 Appareil électronique pour connecter une lampe à décharge au réseau Expired EP0066754B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI811774A FI63314C (fi) 1981-06-08 1981-06-08 Elektroniskt foerkopplingsdon foer gasurladdningslampa
FI811774 1981-06-08

Publications (2)

Publication Number Publication Date
EP0066754A1 true EP0066754A1 (fr) 1982-12-15
EP0066754B1 EP0066754B1 (fr) 1986-01-02

Family

ID=8514479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820104449 Expired EP0066754B1 (fr) 1981-06-08 1982-05-21 Appareil électronique pour connecter une lampe à décharge au réseau

Country Status (6)

Country Link
EP (1) EP0066754B1 (fr)
JP (1) JPS581997A (fr)
AU (1) AU560792B2 (fr)
BR (1) BR8203443A (fr)
DE (1) DE3268249D1 (fr)
FI (1) FI63314C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344021A1 (de) * 1982-12-29 1984-07-05 N.V. Philips' Gloeilampenfabrieken, Eindhoven Anordnung mit einer zumindest zwei innenelektroden ausgeruesteten metalldampfentladungslampe
GB2216350A (en) * 1988-02-26 1989-10-04 Gen Electric Operating discharge lamps
FR2635429A1 (fr) * 1988-03-24 1990-02-16 Gen Electric Alimentation pour lampe au xenon
EP0461312A1 (fr) * 1988-02-11 1991-12-18 Led Corporation N.V. Ballast électronique à impédance variable pour une lampe à décharge
EP0528769A2 (fr) * 1991-07-12 1993-02-24 MAGNETI MARELLI S.p.A. Circuit pulsatoire pour faire marcher une lampe luminescente à gaz en particulier pour l'utilisation dans un véhicule à moteur

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857810A (en) * 1987-03-17 1989-08-15 General Electric Company Current interruption operating circuit for a gaseous discharge lamp
FR2614748A1 (fr) * 1987-04-29 1988-11-04 Omega Electronics Sa Dispositif d'alimentation d'une lampe a decharge
US4928038A (en) * 1988-09-26 1990-05-22 General Electric Company Power control circuit for discharge lamp and method of operating same
JPH04144097A (ja) * 1990-10-05 1992-05-18 Nissan Motor Co Ltd 放電灯の制御装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629648A (en) 1969-07-31 1971-12-21 Brent W Brown Transistorized fluorescent tube operating circuit
US3906302A (en) 1972-01-19 1975-09-16 Philips Corp Arrangement provided with a gas and/or vapour discharge lamp
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4168453A (en) 1977-12-28 1979-09-18 Datapower, Inc. Variable intensity control apparatus for operating a gas discharge lamp
FR2451696A1 (fr) * 1979-03-12 1980-10-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Ballast de lampe a decharge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148393A (en) * 1979-05-08 1980-11-18 Aaru Suteibunzu Kaariru Power supply for gas discharge lamp
JPS5636891A (en) * 1979-08-31 1981-04-10 Matsushita Electric Works Ltd Device for firing discharge lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629648A (en) 1969-07-31 1971-12-21 Brent W Brown Transistorized fluorescent tube operating circuit
US3906302A (en) 1972-01-19 1975-09-16 Philips Corp Arrangement provided with a gas and/or vapour discharge lamp
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4168453A (en) 1977-12-28 1979-09-18 Datapower, Inc. Variable intensity control apparatus for operating a gas discharge lamp
FR2451696A1 (fr) * 1979-03-12 1980-10-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Ballast de lampe a decharge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344021A1 (de) * 1982-12-29 1984-07-05 N.V. Philips' Gloeilampenfabrieken, Eindhoven Anordnung mit einer zumindest zwei innenelektroden ausgeruesteten metalldampfentladungslampe
EP0461312A1 (fr) * 1988-02-11 1991-12-18 Led Corporation N.V. Ballast électronique à impédance variable pour une lampe à décharge
GB2216350A (en) * 1988-02-26 1989-10-04 Gen Electric Operating discharge lamps
US4904907A (en) * 1988-02-26 1990-02-27 General Electric Company Ballast circuit for metal halide lamp
FR2635429A1 (fr) * 1988-03-24 1990-02-16 Gen Electric Alimentation pour lampe au xenon
EP0528769A2 (fr) * 1991-07-12 1993-02-24 MAGNETI MARELLI S.p.A. Circuit pulsatoire pour faire marcher une lampe luminescente à gaz en particulier pour l'utilisation dans un véhicule à moteur
EP0528769A3 (en) * 1991-07-12 1995-09-06 Marelli Autronica A self-pulsing circuit for operating a gas-discharge lamp, particularly for use in a motor vehicle

Also Published As

Publication number Publication date
DE3268249D1 (de) 1986-02-13
FI811774A0 (fi) 1981-06-08
BR8203443A (pt) 1983-06-07
AU560792B2 (en) 1987-04-16
FI63314B (fi) 1983-01-31
FI63314C (fi) 1983-05-10
EP0066754B1 (fr) 1986-01-02
JPS581997A (ja) 1983-01-07
AU8462182A (en) 1982-12-16

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