EP0066481A1 - Dispositif d'alimentation électronique pour lampes à décharge - Google Patents

Dispositif d'alimentation électronique pour lampes à décharge Download PDF

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Publication number
EP0066481A1
EP0066481A1 EP82400800A EP82400800A EP0066481A1 EP 0066481 A1 EP0066481 A1 EP 0066481A1 EP 82400800 A EP82400800 A EP 82400800A EP 82400800 A EP82400800 A EP 82400800A EP 0066481 A1 EP0066481 A1 EP 0066481A1
Authority
EP
European Patent Office
Prior art keywords
supply device
current
transistor
lamp
electronic supply
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.)
Withdrawn
Application number
EP82400800A
Other languages
German (de)
English (en)
French (fr)
Inventor
Denys Klein
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.)
Compagnie de Signaux et dEntreprises Electriques SA
Original Assignee
Compagnie de Signaux et dEntreprises Electriques SA
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 Compagnie de Signaux et dEntreprises Electriques SA filed Critical Compagnie de Signaux et dEntreprises Electriques SA
Publication of EP0066481A1 publication Critical patent/EP0066481A1/fr
Withdrawn legal-status Critical Current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
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase
    • H05B41/388—Controlling the intensity of light during the transitional start-up phase for a transition from glow to arc
    • 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
    • H05B41/2881—Load circuits; Control thereof
    • H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter

Definitions

  • the present invention relates to an electronic power supply device for discharge lamp, comprising a switching regulator consisting of a chopping transistor driven with a variable duty cycle by means of a pilot stage, a smoothing inductor, d '' a freewheeling diode and a filter capacitor.
  • Such supply devices make it possible in particular to measure the brightness of the discharge lamps, and more particularly of those called "daylight" which equip the stage lighting projectors.
  • To be able to offer a good color rendering index they generally receive a complex filling based on argon, mercury, halogens and earths.
  • the ignition, warm-up, steady state and re-ignition operations after extinction require special precautions on the part of the power supply manufacturer due to the transient phenomena manifested by solid, liquid or gaseous bodies in the filling of on the one hand, and transient overvoltages or overcurrents which affect the electrical or electronic components on the other.
  • the object of the invention is therefore to program the successive phases of putting the lamp into service according to a sequence taking account of the requirements of safety, reliability and rapid temperature rise, without the lamp life being altered and the dosability of the light it emits.
  • the electronic power supply device is essentially characterized in that it comprises means for lowering the switching frequency of the chopping transistor during the heating period of the lamp, until its arc voltage has reached approximately 70% of its nominal value.
  • said frequency lowering means comprise an analog gate sensitive to the arc voltage, acting on the time constant of an oscillator attacking the pilot stage via a duty cycle modulator.
  • the power supply device comprises an electric circuit breaker, sensitive to the current delivered by the chopping transistor, for shunting the attack of the pilot stage when this current exceeds a predetermined maximum value.
  • This circuit breaker will for example be constituted by a threshold device controlling the conduction of a transistor connected in parallel to the input of the pilot stage.
  • a resistor is inserted upstream of the regulator, in order to limit the inrush current when the supply device is switched on.
  • this resistor is connected in parallel with a thyristor or a triac whose trigger is supplied continuously from a secondary winding wound on the smoothing inductor, by means of a rectifier, a filtering capacitor and a resistive adapter.
  • the inrush current limiting resistor is automatically shunted as soon as the chopper transistor starts to operate.
  • the device shown in FIG. 1 firstly comprises a switching regulator of the conventional type, essentially consisting of a chopping transistor T 59, a smoothing inductor S, a freewheeling diode D5 and a filtering capacitor C.
  • An inverter of polarity I is placed downstream of the regulator to avoid cataphoresis of the electrodes of the discharge lamp L which is connected in series with an igniter A.
  • a rectifier bridge Upstream of the regulator, there is a rectifier bridge with four diodes D 1 , D 2 , D 3 and D 4 , as well as a capacitor C 1 whose role is to store energy in electrostatic form, to cope with needs of the lamp when the alternating voltage of the network passes near zero.
  • the cyclical report / T of chopper conduction is defined by a comparator ⁇ capable of exploiting the difference between the signal representing the setpoint power P and the signal representing the real power delivered to the output.
  • the electrical expression of this real power is obtained from an analog member M attacked both by the voltage U c and by the current i, thanks to a measurement shunt s inserted in the path of the output current.
  • the analog organ M can either be a multiplier performing the product of the voltage U c by the current i, or a weighted adder performing the sum a U c + bi. Modifying the power setpoint P results in a signal for modifying the duty cycle from the comparator ⁇ , so as to keep the real power very close to P. It is thus thus possible to dose at will the luminous flux emitted by the lamp in steady state, or to finely adjust the color temperature of its radiation, by simply changing the reference power P o .
  • the circuit located upstream of the regulator constitutes a voltage doubler with two diodes D 1 , D 2 and two capacitors C 2 and C 3 .
  • the resistor R for limiting the inrush current is then connected in parallel with a triac Tr, the trigger of which is continuously attacked under the same conditions as above.
  • the regulator gives instructions to cause the terminals of the filter capacitor C to generate a high voltage, typically 250 volts, so that the plasma ionization triggered by the spark train of igniter A can be maintained afterwards.
  • the arc voltage being low on a cold lamp, typically 5 to 20 volts, it is advantageous to regulate the average current flowing through it to a value greater than the nominal current in order to hasten the heating.
  • We are helped in this approach by the fact that the alternating component of the current flowing through S has a small amplitude I is weak. Without crossing the maximum current I M tolerable by the transistor, it is therefore possible to enhance the initial DC component Io.
  • T is increased in the same proportion so that the ratio keep fixing the report .
  • the advantage of an increase in p resides in the fact that the establishment times of the collector current are not negligible (typically 0.5 microseconds).
  • the duration would be cold by about 1 microsecond.
  • the danger of increasing the continuous component and increasing the time comes from a possible saturation of the magnetic material on which the inductance S is wound, and from the possible overshooting of the intensity that the chopping transistor T 5 can deliver without excessive waste voltage, taking into account the basic attack of which it is the object in the conductive state.
  • this danger is averted on the one hand by an electronic circuit breaker operating from a current sensor inserted on the current path delivered by T 5 , on the other hand by a frequency reducer interposed on the 'all or nothing attack of the chopper.
  • the duty cycle / T is advantageously made small by an increase in the period T.
  • the sawtooth wave which represents the current in the inductance subjected to a voltage in crenellations offers a rise ramp long enough for the current delivered by the transistor T has time to establish.
  • the taking of information by virtue of which the lowering of the chopper frequency is decided calls on the low value of cold arc voltage.
  • the operation of this chopper at half the frequency, for example, is maintained as long as the arc voltage remains below approximately 70% of the nominal voltage.
  • the frequency of oscillator 0 is subject to a modifiable time constant consisting of a capacitor C 4 and two resistors R 1 , R 2 .
  • the resistor R 2 can be shunted by means of a contact T 1 controlled by an analog gate PA sensitive to the arc voltage U c of the lamp.
  • This analog gate is equivalent to a relay whose excitation voltage would be equal to 70% of the nominal arc tensin.
  • the analog gate PA also controls the operation of a second contact T 2 making it possible to switch to the MRC modulator, either the current comparator 1 , or the power comparator ⁇ 2 .
  • Comparator A receives the initial reference current I o and the information relating to the mean current i of the lamp via the measurement shunt s.
  • the comparator ⁇ 2 receives the setpoint power P o and the information relating to the real power via the analog member M.
  • the diagram is completed by a threshold device DS sensitive to the current delivered by the chopping transistor T, thanks to a second shunt r inserted in the circuit.
  • This threshold device is set to the maximum admissible current I M and controls the operation of the transistor T 6 connected in parallel to the input of the pilot stage P.
  • the period of the oscillator 0 is proportional to the time constant (R 1 + R 2 ) C 4 , ie typically 80 microseconds, since the contact T 1 is then at rest.
  • the contact T 2 is also at rest, so that the duty cycle modulator MRC operates by comparison ⁇ 1 between the current actually delivered to the lamp and the initial setpoint current I o , generally chosen to be 1, 2 times the nominal.
  • the current then has the shape shown in FIG. 4 with a wave centered on the continuous component I o .
  • the current increases with a slope UU c until reaching the peak value I o + .
  • the signal coming from the cyclic ratio modulator MRC is routed freely towards the pilot stage P which attacks the chopper T 5 .
  • the threshold device DS which would bypass the attack on the pilot stage P thanks to the switching on of the transistor T 6 .
  • the effect of this disjunction would be the same as if was shortened, and T- ⁇ lengthened accordingly.
  • the analog gate PA activates the working contact T 1 which shunts R 2 , thus reducing the period T to the value typical 40 microseconds.
  • the contact T 2 is engaged in its working position and replaces the attack on the duty cycle modulator MRC by the current comparator ⁇ 1 that of the power comparator ⁇ 2 .
  • the latter operates by capturing the average current of the lamp by means of the measurement shunt s, and measurement of the voltage U c close to the arc voltage, the weighted multiplier or adder M performing the product of these two parameters.
  • the shape of the current is then that shown in FIG.
  • Diagram 6e illustrates the operation of the regulator between times t 4 and t 55 with a reduced frequency and an increased current setpoint.
  • Diagram 6f illustrates the operation of the regulator from time t 5 , with a normal frequency and a nominal or reduced power setpoint which can also be variable at the discretion of the user.
  • diagram 6g it illustrates the operation of the regulator between times t 1 and t 4 , with a normal frequency and a maximum voltage setpoint U.
  • phase t 4 - t 5 may be shortened all the more since the duration of the interruption has been shorter; the arc voltage can indeed have a value significantly higher than when cold, if the heat accumulated during ignition was able to be retained during extinction.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Dc-Dc Converters (AREA)
EP82400800A 1981-05-20 1982-04-30 Dispositif d'alimentation électronique pour lampes à décharge Withdrawn EP0066481A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8110056A FR2506554A1 (fr) 1981-05-20 1981-05-20 Dispositif d'alimentation electronique pour lampes a decharge
FR8110056 1981-05-20

Publications (1)

Publication Number Publication Date
EP0066481A1 true EP0066481A1 (fr) 1982-12-08

Family

ID=9258689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400800A Withdrawn EP0066481A1 (fr) 1981-05-20 1982-04-30 Dispositif d'alimentation électronique pour lampes à décharge

Country Status (3)

Country Link
US (1) US4412154A (en:Method)
EP (1) EP0066481A1 (en:Method)
FR (1) FR2506554A1 (en:Method)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147162A (en) * 1983-09-22 1985-05-01 Isco Inc Gas discharge lamp control circuits for absorbance monitors
GB2172451A (en) * 1985-02-07 1986-09-17 El Co Villamos Keszulekek Es S Circuit for igniting and lighting a high pressure discharge lamp
GB2179510A (en) * 1985-08-10 1987-03-04 Diehl Gmbh & Co A starting and dimming circuit for a fluorescent tube
FR2630614A1 (fr) * 1988-02-26 1989-10-27 Gen Electric Circuit ballast pour lampe a halogene-metal
FR2648000A1 (fr) * 1989-06-02 1990-12-07 Koito Mfg Co Ltd Circuit d'allumage pour lampe a decharge sous haute pression pour vehicules
EP0383692A3 (en) * 1989-02-16 1991-05-02 Nissan Motor Co., Ltd. Circuit and method for controlling luminous intensity of discharge lamps
EP0415496A3 (en) * 1989-08-31 1991-05-02 Philips Patentverwaltung Gmbh Circuit for supplying a load
EP0443795A3 (en) * 1990-02-20 1991-10-09 General Electric Company Operating gas-discharge light sources
WO2007078911A3 (en) * 2005-12-29 2007-08-23 Gen Electric Ripple reduction method for electronic ballasts
US8106327B2 (en) 2004-08-24 2012-01-31 Saipem S.P.A. ARC welding torch including a wire guide open on one side and arranged to receive a welding wire from a laterally spaced apart location and method of using same
EP2268109A3 (en) * 2009-06-25 2014-04-30 Panasonic Corporation Discharge lamp lighting device and illumination device using the same

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU181323B (en) * 1981-05-08 1983-07-28 Egyesuelt Izzolampa High-frequency system of additional resistor for electric discharge lamp
US4719390A (en) * 1982-05-24 1988-01-12 Helvar Oy Electronic mains connection device for a gas discharge lamp
DE3327030A1 (de) * 1983-07-27 1985-02-07 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zum betrieb von hochdruckgasentladungslampen
US4616159A (en) * 1983-08-22 1986-10-07 The North American Manufacturing Company Driving circuit for pulsating radiation detector
US4686428A (en) * 1985-08-28 1987-08-11 Innovative Controls, Incorporated High intensity discharge lamp self-adjusting ballast system with current limiters and a current feedback loop
ZA862614B (en) * 1986-04-08 1986-12-30 David John Cockram Controller for gas discharge lamps
US4727297A (en) * 1986-07-17 1988-02-23 Peak Systems, Inc. Arc lamp power supply
US4700111A (en) * 1986-07-28 1987-10-13 Intelite Inc. High frequency ballast circuit
US4999547A (en) 1986-09-25 1991-03-12 Innovative Controls, Incorporated Ballast for high pressure sodium lamps having constant line and lamp wattage
NL8800015A (nl) * 1988-01-06 1989-08-01 Philips Nv Elektrische inrichting voor het ontsteken en voeden van een gasontladingslamp.
US5012392A (en) * 1989-02-13 1991-04-30 Hochstein Peter A Automatic battery powered video light
JPH03138894A (ja) * 1989-10-23 1991-06-13 Nissan Motor Co Ltd 放電灯点灯装置
ES2071752T3 (es) * 1990-01-29 1995-07-01 Philips Electronics Nv Disposicion de circuito.
US5047698A (en) * 1991-03-14 1991-09-10 Thomson Consumer Electronics, Inc. High voltage shutdown circuit
US5250877A (en) * 1991-06-04 1993-10-05 Rockwell International Corporation Method and apparatus for driving a gas discharge lamp
JP3258758B2 (ja) * 1993-04-12 2002-02-18 池田デンソー株式会社 放電灯点灯装置
US5619104A (en) * 1994-10-07 1997-04-08 Samsung Electronics Co., Ltd. Multiplier that multiplies the output voltage from the control circuit with the voltage from the boost circuit
JP2962506B2 (ja) * 1994-10-14 1999-10-12 株式会社日立製作所 放電管点灯装置
TW330369B (en) * 1995-10-09 1998-04-21 Philips Electronics Nv Circuit arrangement
TW440123U (en) * 1995-10-09 2001-06-07 Koninkl Philips Electronics Nv A circuit arrangement for igniting and operating a high pressure discharge lamp
WO1997043877A1 (en) * 1996-05-10 1997-11-20 Philips Electronics N.V. Circuit arrangement
DE19622807A1 (de) * 1996-06-07 1997-12-11 Mitronic P Miller Gmbh Leistungsregelung von Bogenlampen
US6552498B1 (en) * 2001-09-28 2003-04-22 Osram Sylvania Inc. Method and circuit for controlling current in a high pressure discharge lamp
US6864642B2 (en) * 2002-10-07 2005-03-08 Bruce Industries, Inc. Electronic ballast with DC output flyback converter
US6879113B2 (en) * 2003-03-11 2005-04-12 Bruce Industries, Inc. Low frequency output electronic ballast
JP4923852B2 (ja) * 2005-09-29 2012-04-25 東芝ライテック株式会社 放電ランプ点灯装置および照明装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053236A (en:Method) * 1900-01-01
FR2251980A1 (en:Method) * 1973-11-19 1975-06-13 Lutron Electronics Co
GB2052190A (en) * 1979-06-29 1981-01-21 Quietlite Int Ltd Direct Current Power Supply for an Electric Discharge Lamp

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
GB1326392A (en) * 1970-11-14 1973-08-08 Dobson Park Ind Fluorescent lamp and other circuits
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4060752A (en) * 1976-03-01 1977-11-29 General Electric Company Discharge lamp auxiliary circuit with dI/dt switching control
US4240009A (en) * 1978-02-27 1980-12-16 Paul Jon D Electronic ballast
US4277728A (en) * 1978-05-08 1981-07-07 Stevens Luminoptics Power supply for a high intensity discharge or fluorescent lamp
US4259614A (en) * 1979-07-20 1981-03-31 Kohler Thomas P Electronic ballast-inverter for multiple fluorescent lamps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053236A (en:Method) * 1900-01-01
FR2251980A1 (en:Method) * 1973-11-19 1975-06-13 Lutron Electronics Co
GB2052190A (en) * 1979-06-29 1981-01-21 Quietlite Int Ltd Direct Current Power Supply for an Electric Discharge Lamp

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163015A (en) * 1983-09-22 1986-02-12 Isco Inc Method of operating an absorbance monitor
GB2147162A (en) * 1983-09-22 1985-05-01 Isco Inc Gas discharge lamp control circuits for absorbance monitors
GB2172451B (en) * 1985-02-07 1989-06-14 El Co Villamos Keszulekek Es S Circuit system for igniting and lighting a high-pressure discharge lamp particulary a sodium vapour lamp
GB2172451A (en) * 1985-02-07 1986-09-17 El Co Villamos Keszulekek Es S Circuit for igniting and lighting a high pressure discharge lamp
US4749914A (en) * 1985-02-07 1988-06-07 El-Co Villamos Keszulekek Es Szerelesi Anyagok Gyara Circuit system for igniting and operating a high-pressure discharge lamp, particularly a sodium vapor lamp
GB2179510B (en) * 1985-08-10 1989-08-09 Diehl Gmbh & Co A starting and dimming circuit for a fluorescent lamp
GB2179510A (en) * 1985-08-10 1987-03-04 Diehl Gmbh & Co A starting and dimming circuit for a fluorescent tube
FR2630614A1 (fr) * 1988-02-26 1989-10-27 Gen Electric Circuit ballast pour lampe a halogene-metal
EP0383692A3 (en) * 1989-02-16 1991-05-02 Nissan Motor Co., Ltd. Circuit and method for controlling luminous intensity of discharge lamps
FR2648000A1 (fr) * 1989-06-02 1990-12-07 Koito Mfg Co Ltd Circuit d'allumage pour lampe a decharge sous haute pression pour vehicules
EP0415496A3 (en) * 1989-08-31 1991-05-02 Philips Patentverwaltung Gmbh Circuit for supplying a load
EP0443795A3 (en) * 1990-02-20 1991-10-09 General Electric Company Operating gas-discharge light sources
US8106327B2 (en) 2004-08-24 2012-01-31 Saipem S.P.A. ARC welding torch including a wire guide open on one side and arranged to receive a welding wire from a laterally spaced apart location and method of using same
WO2007078911A3 (en) * 2005-12-29 2007-08-23 Gen Electric Ripple reduction method for electronic ballasts
EP2268109A3 (en) * 2009-06-25 2014-04-30 Panasonic Corporation Discharge lamp lighting device and illumination device using the same

Also Published As

Publication number Publication date
US4412154A (en) 1983-10-25
FR2506554B1 (en:Method) 1984-08-03
FR2506554A1 (fr) 1982-11-26

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