EP0485866A1 - Hacheur pour alimenter une lampe à décharge - Google Patents

Hacheur pour alimenter une lampe à décharge Download PDF

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Publication number
EP0485866A1
EP0485866A1 EP91118851A EP91118851A EP0485866A1 EP 0485866 A1 EP0485866 A1 EP 0485866A1 EP 91118851 A EP91118851 A EP 91118851A EP 91118851 A EP91118851 A EP 91118851A EP 0485866 A1 EP0485866 A1 EP 0485866A1
Authority
EP
European Patent Office
Prior art keywords
power supply
switching power
capacitor
discharge lamp
output
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
EP91118851A
Other languages
German (de)
English (en)
Other versions
EP0485866B1 (fr
Inventor
Franz Bernitz
Andreas Huber
Frank Hansmann
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0485866A1 publication Critical patent/EP0485866A1/fr
Application granted granted Critical
Publication of EP0485866B1 publication Critical patent/EP0485866B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the invention relates to a clocked switching power supply according to the preamble of protection claim 1.
  • Such switching power supplies are part of electronic ballasts for high-pressure discharge lamps, in particular high-pressure discharge lamps with low power consumption.
  • EP-A-0 256 231 discloses a switching power supply with a control circuit which is suitable for discharge lamps.
  • the capacitor at the output of the switching power supply is used to supply energy to the discharge lamp during the conducting phase of the switching transistor.
  • the capacitance of this capacitor should be chosen so large that the supply current of the discharge lamp is only from a small AC component, which results from the high-frequency switching frequency of the transistor, is superimposed. This prevents the discharge in the lamp from going out during the conducting phase of the switching transistor.
  • the capacitance of the capacitor on the output side must be sufficiently small so that the voltage across this capacitor can be set to the lamp operating voltage quickly enough via the pulse width ratio of the switching regulator.
  • the RC element parallel to the output capacitor has a relatively large time constant, so that a small, but longer-lasting discharge current flows from the capacitor of the RC element, which, in conjunction with the relatively high, but only briefly flowing discharge current of the output capacitor, ignites with subsequent Arc pickup at the discharge lamp ensured.
  • a time-variable resistor can also be connected between the switching power supply and the high-pressure discharge lamp in series with the lamp.
  • This resistor can consist of a thermistor or a parallel connection of a resistor with a mechanical relay contact. At the time of ignition, the resistance of the resistor prevents a high discharge current from flowing out of the output capacitor for a short time. It is only through the onset of self-heating - in the case of the thermistor - or through the closing of the relay contact in parallel connection that an increased current flow is made possible, so that the start of the lamp is guaranteed to work properly.
  • FIG. 1 shows the basic structure of an electronic ballast for a 35 watt metal halide high-pressure discharge lamp L with a switching power supply according to the invention and an ignition circuit Z.
  • the switching power supply is a secondary clocked throttle step-up converter (boost converter).
  • the control part S is not the subject of the invention and is therefore only shown schematically. An example of this can be found eg in EP-A-0 059 053.
  • As voltage source U Batt. serves a 12 volt car battery.
  • An input capacitor C E with a capacitance of 5000 ⁇ F is connected in parallel with the voltage source.
  • a power MOSFET is used as the switching transistor T Q , the gate voltage of which is keyed at a frequency of 20-75 kHz by means of the control circuit.
  • the choke step-up converter also includes a choke L S with an inductance of 0.5 mH, a diode D and an output capacitor C A with a capacitance of 3.3 ⁇ F.
  • An RC element is connected in parallel with the output capacitor C A , the ohmic resistance R of which has a value of 33 ⁇ and the capacitor C R of which has a capacitance of 22 ⁇ F.
  • the 35-watt high-pressure discharge lamp L is connected in series with the ignition circuit Z in parallel with the output capacitor C A and in parallel with the RC element. Examples of the ignition circuit Z are described in the article "Ignition of metal halide lamps" by H.-J.Fähnrich and H.Leyendecker, predominantly- und Kino-Technik 1972, No. 8, p.279.
  • the load circuit with the discharge lamp L is completely separated from the circuit which is formed by the battery, the inductor L S and the transistor T Q because of the diode D.
  • the energy supply of the lamp L is mainly ensured by the output capacitor C A during the conducting phase of the transistor T Q.
  • the battery and the choke L S take over the voltage supply for the discharge lamp L.
  • the capacitors C A and C R are also charged to the output voltage of the switching power supply.
  • the control circuit regulates the output voltage of the Switching power supply via the duty cycle of the switching transistor T Q to the lamp voltage of approx. 100 V.
  • the RC element serves only as an ignition aid.
  • the output capacitor C A supplies a high discharge current of approximately 50 A for a short period of approximately 3 ⁇ s, which generates a “hot spot” on the electrodes of the lamp, but is not sufficient for the lamp after the ignition pulse to be transferred to the arc discharge. Only the slower decaying, relatively small discharge current of the capacitor C R , the initial value of which is approximately 5 A, together with the discharge current of the output capacitor C A enables the lamp to be ignited safely.
  • FIG. 2 shows a modified embodiment of the basic structure of an electronic ballast for a 35-watt metal halide high-pressure discharge lamp.
  • the exemplary embodiment largely corresponds to the example shown in FIG. 1.
  • a thermistor H is connected in series with the high-pressure discharge lamp L.
  • the invention is not limited to the exemplary embodiment described here, but can equally well be applied to other switching power supplies, such as can be applied to a flyback converter (isolated or non-isolated) or a buck converter (buck converter).
  • a flyback converter isolated or non-isolated
  • buck converter buck converter
EP91118851A 1990-11-15 1991-11-05 Hacheur pour alimenter une lampe à décharge Expired - Lifetime EP0485866B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9015674U 1990-11-15
DE9015674U DE9015674U1 (fr) 1990-11-15 1990-11-15

Publications (2)

Publication Number Publication Date
EP0485866A1 true EP0485866A1 (fr) 1992-05-20
EP0485866B1 EP0485866B1 (fr) 1996-01-31

Family

ID=6859402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118851A Expired - Lifetime EP0485866B1 (fr) 1990-11-15 1991-11-05 Hacheur pour alimenter une lampe à décharge

Country Status (5)

Country Link
US (1) US5343125A (fr)
EP (1) EP0485866B1 (fr)
JP (1) JPH0499697U (fr)
KR (1) KR0120598Y1 (fr)
DE (2) DE9015674U1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693074A1 (fr) * 1992-06-26 1993-12-31 Valeo Vision Dispositif pour une lampe à décharge destiné à équiper un projecteur de véhicule et projecteur équipé d'un tel dispositif.
WO1994007345A1 (fr) * 1992-09-24 1994-03-31 Robert Bosch Gmbh Circuit cadence d'alimentation en courant
FR2698515A1 (fr) * 1992-11-20 1994-05-27 Valeo Vision Dispositif d'alimentation de lampes à décharge notamment pour projecteur de véhicule.
EP0629104A2 (fr) * 1993-06-11 1994-12-14 Tridonic Bauelemente GmbH Circuit pour limiter le courant continu decrête et/ou le courant d'appel par l'allumage d'une lampe à décharge
WO1997021329A1 (fr) * 1995-12-01 1997-06-12 Robert Bosch Gmbh Circuit d'amorçage pour lampe a decharge a haute pression
WO1999041956A1 (fr) * 1998-02-13 1999-08-19 Valeo Vision Perfectionnements aux dispositifs pour l'alimentation d'une lampe a decharge de projecteur de vehicule automobile
EP0967843A2 (fr) * 1998-06-25 1999-12-29 Orc Manufacturing Co., Ltd. Dispositif et procédé de commande d'une lampe à décharge

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646485A (en) * 1995-12-14 1997-07-08 General Motors Corporation Motor vehicle daytime running light system having buck switch mode converter
CA2267366C (fr) * 1997-07-22 2006-01-10 Eugen Statnic Procede pour produire des sequences d'impulsions de tension et ensemble circuit correspondant
WO1999012403A1 (fr) * 1997-09-01 1999-03-11 Koninklijke Philips Electronics N.V. Montage
US6834066B2 (en) * 2000-04-18 2004-12-21 Lambda Physik Ag Stabilization technique for high repetition rate gas discharge lasers
US6495970B1 (en) * 2001-11-14 2002-12-17 Sun Lite Sockets Industry Inc. Lamp stand with multi-stage light modulation
US7557555B2 (en) * 2007-04-05 2009-07-07 Ford Global Technologies, Llc Method to determine an operating characteristic of a vehicle power converter
US8274236B2 (en) * 2009-04-01 2012-09-25 Delta Electronics, Inc. Power supply having an auxiliary power stage for sustaining sufficient post ignition current in a DC lamp

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2383576A1 (fr) * 1977-03-08 1978-10-06 Ulrich Helmut Montage d'allumage et d'alimentation pour lampes fluorescentes
FR2489069A1 (fr) * 1980-08-20 1982-02-26 Ushio Electric Inc Dispositif d'allumage de lampe a decharge a courant electrique continu
EP0256231A2 (fr) * 1986-08-13 1988-02-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit de commande pour une alimentation à découpage à courant d'entrée de forme sinusoidale pour transformer une tension alternative de forme sinusoidale en tension continue régulée

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419778B1 (fr) * 1971-06-18 1979-07-18
EP0059053A3 (fr) * 1981-02-21 1983-05-18 THORN EMI plc Alimentation de courant à impulsions
JPS6019148A (ja) * 1983-07-14 1985-01-31 Fuji Photo Film Co Ltd 電子写真感光体
DE3441992A1 (de) * 1984-11-16 1986-05-22 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Schaltungsanordnung zur zuendung einer niederdruckentladungslampe
ZA862614B (en) * 1986-04-08 1986-12-30 David John Cockram Controller for gas discharge lamps
US4730147A (en) * 1986-08-19 1988-03-08 Siemens Aktiengesellschaft Method and arrangement for the operation of a gas discharge lamp
US4866347A (en) * 1987-09-28 1989-09-12 Hubbell Incorporated Compact fluorescent lamp circuit
US4904907A (en) * 1988-02-26 1990-02-27 General Electric Company Ballast circuit for metal halide lamp
US5047695A (en) * 1990-02-20 1991-09-10 General Electric Company Direct current (DC) acoustic operation of xenon-metal halide lamps using high-frequency ripple
US5059867A (en) * 1990-04-03 1991-10-22 General Electric Company Ballast circuit with improved transfer functions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2383576A1 (fr) * 1977-03-08 1978-10-06 Ulrich Helmut Montage d'allumage et d'alimentation pour lampes fluorescentes
FR2489069A1 (fr) * 1980-08-20 1982-02-26 Ushio Electric Inc Dispositif d'allumage de lampe a decharge a courant electrique continu
EP0256231A2 (fr) * 1986-08-13 1988-02-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit de commande pour une alimentation à découpage à courant d'entrée de forme sinusoidale pour transformer une tension alternative de forme sinusoidale en tension continue régulée

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693074A1 (fr) * 1992-06-26 1993-12-31 Valeo Vision Dispositif pour une lampe à décharge destiné à équiper un projecteur de véhicule et projecteur équipé d'un tel dispositif.
WO1994007345A1 (fr) * 1992-09-24 1994-03-31 Robert Bosch Gmbh Circuit cadence d'alimentation en courant
FR2698515A1 (fr) * 1992-11-20 1994-05-27 Valeo Vision Dispositif d'alimentation de lampes à décharge notamment pour projecteur de véhicule.
EP0629104A2 (fr) * 1993-06-11 1994-12-14 Tridonic Bauelemente GmbH Circuit pour limiter le courant continu decrête et/ou le courant d'appel par l'allumage d'une lampe à décharge
EP0629104A3 (fr) * 1993-06-11 1995-08-02 Tridonic Bauelemente Circuit pour limiter le courant continu decrête et/ou le courant d'appel par l'allumage d'une lampe à décharge.
WO1997021329A1 (fr) * 1995-12-01 1997-06-12 Robert Bosch Gmbh Circuit d'amorçage pour lampe a decharge a haute pression
WO1999041956A1 (fr) * 1998-02-13 1999-08-19 Valeo Vision Perfectionnements aux dispositifs pour l'alimentation d'une lampe a decharge de projecteur de vehicule automobile
FR2775155A1 (fr) * 1998-02-13 1999-08-20 Valeo Electronique Perfectionnements aux dispositifs pour l'alimentation d'une lampe a decharge de projecteur de vehicule automobile
US6191540B1 (en) 1998-02-13 2001-02-20 Valeo Vision Devices for powering a motor vehicle headlight discharge lamp
EP0967843A2 (fr) * 1998-06-25 1999-12-29 Orc Manufacturing Co., Ltd. Dispositif et procédé de commande d'une lampe à décharge
EP0967843A3 (fr) * 1998-06-25 2001-07-11 Orc Manufacturing Co., Ltd. Dispositif et procédé de commande d'une lampe à décharge

Also Published As

Publication number Publication date
KR0120598Y1 (ko) 1998-10-01
KR920010795U (ko) 1992-06-17
US5343125A (en) 1994-08-30
DE59107339D1 (de) 1996-03-14
DE9015674U1 (fr) 1992-03-12
EP0485866B1 (fr) 1996-01-31
JPH0499697U (fr) 1992-08-28

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