EP0111373B1 - Schaltungsanordnung zum Starten und Betrieb von Hochdruck-Gasentladungslampen - Google Patents

Schaltungsanordnung zum Starten und Betrieb von Hochdruck-Gasentladungslampen Download PDF

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Publication number
EP0111373B1
EP0111373B1 EP83201738A EP83201738A EP0111373B1 EP 0111373 B1 EP0111373 B1 EP 0111373B1 EP 83201738 A EP83201738 A EP 83201738A EP 83201738 A EP83201738 A EP 83201738A EP 0111373 B1 EP0111373 B1 EP 0111373B1
Authority
EP
European Patent Office
Prior art keywords
lamp
capacitor
starting
diode
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
EP83201738A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0111373A1 (de
Inventor
Hans-Günter 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
Priority to AT83201738T priority Critical patent/ATE27528T1/de
Publication of EP0111373A1 publication Critical patent/EP0111373A1/de
Application granted granted Critical
Publication of EP0111373B1 publication Critical patent/EP0111373B1/de
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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/18—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch
    • H05B41/19—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch for lamps having an auxiliary starting electrode
    • 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 circuit arrangement for starting and operating high-pressure gas discharge lamps with an outer starting electrode, the discharge lamp being connected in series with a current limiter to a voltage source and a starting pulse generator being provided which has a connection on the secondary side to the starting electrode and on the primary side to a pulse capacitor standing pulse transformer and a voltage-dependent switching element.
  • a problem with starting and operating high pressure gas discharge lamps is the initial ignition of the lamps, i. H. the starting of the cold lamps and the re-ignition after each zero crossing of the mains alternating current or every direct current pulse. This applies per se to all high-pressure gas discharge lamps, e.g. B. for mercury vapor or sodium vapor discharge lamps, but especially for metal halide discharge lamps.
  • the discharge lamps To facilitate the starting of high pressure gas discharge lamps, it is e.g. B. from DE-OS-2717 853 and 31 09 539 known to provide the discharge lamps with an outer starting electrode and to apply a high-frequency high-voltage pulse between them and one of the main electrodes for starting.
  • the starting electrode is e.g. B. formed as a wire loop or wire coil around the lamp bulb; it can also be a wire tip attached near the lamp.
  • the lamp is not always started regularly with the first start pulse. The lamp often ignites only briefly during the first start pulse and then goes out again. The lamp only starts to burn continuously after the start pulse has been repeated several times. This starting behavior has a disadvantageous effect on the life of the lamp, since the lamp bulb often ignites due to frequent ignition.
  • the invention is therefore based on the object to provide a circuit arrangement for starting and operating high-pressure gas discharge lamps, in which the lamp starts to burn continuously already at the first start pulse, although the voltage applied to the main electrodes of the lamp is relatively low and at least below that Mains AC voltage is.
  • the voltage source is a full-wave rectifier connected to an AC voltage network, the output of which is bridged by a series circuit with a diode and a further capacitor, which partially overlaps after each half cycle of the AC network voltage discharges the lamp, with a high-resistance resistor connected to the current limiter connected in the circuit between the diode-side end of this capacitor and the lamp, which limits the discharge current of the capacitor (5) via the ignited lamp (3) to a maximum of 30 mA.
  • the lamp does not go out even after the zero crossings of the AC line voltage following the first ignition. It is sufficient if the capacitor has a value between 10 nF and 1 f.LF depending on the lamp type. To avoid reignition difficulties, it is sufficient if a very small current flows in the discharge circuit between the capacitor and the lamp, which current is between approximately 1 and 30 mA, depending on the lamp size. This is achieved by limiting the current through the lamp through the high resistance. At the same time, a substantial discharge of the relatively small additional capacitor is avoided.
  • the starting process is thus considerably improved by the circuit part formed from the diode, the further capacitor and the high-resistance resistor. Without this circuit part, the start pulse must be repeated several times until the lamp burns continuously, while when the relevant circuit part is switched on, the first ignition occurs regularly with the first start pulse.
  • the further capacitor also serves as a pulse capacitor, which leads to a simplification of the circuit and a saving in components.
  • the current limiter is an ohmic resistor which is connected in series with another diode.
  • the current limiter can also be an electronic ballast, for. B. a chopper or a flyback converter, to which a further diode is connected in series, the lamp-side end of the high-resistance resistor being connected between this further diode and the ballast.
  • ballasts usually in series with the lamp switching transistor in the vicinity of the zero crossings of the AC line voltage and when the lamp is not lit or when a low-current glow discharge occurs, so that a current can flow from the capacitor through the high-resistance resistor through the lamp.
  • a and B designate input terminals for connection to an AC voltage network of 220 V, 50 Hz.
  • a full-wave rectifier 1 with four diodes is connected to these input terminals, possibly via a line filter. which generates a pulsating direct current.
  • a high-pressure gas discharge lamp 3 is connected in series with a current limiter 2 to the output of the full-wave rectifier 1.
  • the output of the full-wave rectifier 1 is also bridged by a series connection of a diode 4 and a capacitor 5.
  • a resistor 6 with respect to the current limiter 2 is connected.
  • the current limiter 2 is an ohmic resistor 2, which is connected in series with a further diode 7 to avoid reverse currents.
  • this trigger diode 14 As soon as this voltage across the capacitor 12 reaches the ignition voltage U z of a trigger diode 14 (approximately 30 V), this trigger diode 14 and then also a subsequent thyristor 15 becomes conductive, so that the pulse capacitor 9 discharges via the primary winding of the ignition transformer 10 and thereby in whose secondary winding causes a voltage pulse of a few kilovolts, which is applied to a starting electrode C of the lamp 3. After the discharge of the pulse capacitor 9, the thyristor 15 becomes high-resistance again. If the lamp 3 starts, the voltage U L applied to the lamp drops to a value of the lamp operating voltage. By a suitable choice of the resistance ratio R 13 / (R 1 , + R 13 ) it can be achieved that in this state the ignition voltage U z of the trigger diode 14 is no longer reached, so that no start pulses are generated when the lamp is on.
  • the capacitor 5 charges via the diode 4 to the peak value of the mains voltage of approximately 300 V, the diode 4 serving to prevent the capacitor 5 from being discharged during the zero crossings of the mains AC voltage.
  • the capacitor 5 is partially discharged via the lamp 3.
  • the high-resistance resistor 6 serves to limit the discharge current to small values between approximately 1 and 30 mA, so that the voltage across the capacitor 5 drops only insignificantly and the lamp 3 thus has a practically constant voltage of approximately 300 V available during the entire warm-up phase. Surprisingly, this also improves the starting property of the lamp 3, ie. H.
  • the lamp is first ignited regularly at the first start impulse.
  • the current limiter is an electronic ballast 16, such as. Described in U.S. Patent No. 3,890,537.
  • a further diode 7 is in turn connected upstream of this ballast 16.
  • the lamp-side end of the high-resistance resistor 6 is connected between this further diode 7 and the ballast 16.
  • the high-resistance resistor 6 helps to reduce the discharge current from the capacitor 5 via the ballast 16 through the lamp 3 during the zero crossings of the AC mains voltage.
  • the further diode 7 prevents a reverse current from the capacitor 5 to the full-wave rectifier 1.
  • the circuit part consisting of the diode 4, the further capacitor 5 and the high-resistance resistor 6 ensures that the lamp 3 ignites at the first start pulse.
  • the electronic ballast 16 z. B. is a forward converter, its switching transistor is turned on near the zero crossings of the AC line voltage and when the lamp is not lit or when a low-current glow discharge occurs, so that during this time a current from the capacitor 5 via the high-resistance resistor 6 directly to the lamp 3 can flow. Outside the zero crossings of the AC mains voltage, the switching transistor of the electronic ballast 16 usually only works with a pulse duty factor of about 30%, so that the current from the capacitor 5 via the high-resistance resistor 6 is also interrupted with this pulse duty factor.
  • the power loss in the high-resistance resistor 6 is reduced to 30%, but this does not have any disadvantages for the ignition behavior of the lamp 3, since the additional current from the capacitor 5 only flows through the lamp 3 in the vicinity of the zero crossings of the AC line voltage and when a glow discharge occurs got to.
  • FIG. 3 A simplification of a circuit arrangement equipped with an electronic ballast 16 is shown in FIG. 3.
  • the additional capacitor 5 is used simultaneously as a pulse capacitor for generating the start pulse of the lamp 3.
  • the capacitor 5 is in series with the diode 4, the limiting resistor 8 and the primary winding of the ignition transformer 10.
  • the resistor 8 has a value of only 20 kOhm with otherwise identical components.
  • the high-resistance resistor 6 can also be connected to the lamp 3 via an additional switching transistor, which leads to a reduction in the power loss in the high-resistance resistor 6.
  • this switching transistor is then switched on and off via a control circuit which is regulated by the rectified mains voltage. If the instantaneous value of this rectified mains voltage in the vicinity of the zero crossings of the mains AC voltage falls below a value of z. B. 50 V, the switching transistor is turned on so that an additional current can flow from the capacitor 5 through the high-resistance resistor 6 through the lamp 3. At instantaneous values of the rectified mains voltage above z. B. 50 V, d. H. During the major part of the AC line voltage period, the switching transistor is switched non-conductive by the control circuit and thus the current through the high-resistance resistor 6 is interrupted.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP83201738A 1982-12-11 1983-12-08 Schaltungsanordnung zum Starten und Betrieb von Hochdruck-Gasentladungslampen Expired EP0111373B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83201738T ATE27528T1 (de) 1982-12-11 1983-12-08 Schaltungsanordnung zum starten und betrieb von hochdruck-gasentladungslampen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3245923 1982-12-11
DE19823245923 DE3245923A1 (de) 1982-12-11 1982-12-11 Schaltungsanordnung zum starten und betrieb von hochdruck-gasentladungslampen

Publications (2)

Publication Number Publication Date
EP0111373A1 EP0111373A1 (de) 1984-06-20
EP0111373B1 true EP0111373B1 (de) 1987-05-27

Family

ID=6180441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201738A Expired EP0111373B1 (de) 1982-12-11 1983-12-08 Schaltungsanordnung zum Starten und Betrieb von Hochdruck-Gasentladungslampen

Country Status (6)

Country Link
US (1) US4539513A (ja)
EP (1) EP0111373B1 (ja)
JP (1) JPS59117094A (ja)
AT (1) ATE27528T1 (ja)
CA (1) CA1216884A (ja)
DE (2) DE3245923A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2476130C1 (ru) * 2012-02-27 2013-02-27 Александр Геннадьевич Арзамасцев Устройство для предохранения обуви от скольжения

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600862A (en) * 1983-10-12 1986-07-15 Matsushita Electric Industrial Co. Ltd. Discharge lamp operation apparatus
DE3530638A1 (de) * 1985-08-28 1987-03-05 Philips Patentverwaltung Schaltungsanordnung zum starten und betrieb von gasentladungslampen
US4739225A (en) * 1986-11-03 1988-04-19 General Electric Company Reduced requirement energy storage for load having non-zero minimum operating potential
US4806975A (en) * 1987-08-24 1989-02-21 Xerox Corporation Erase lamp with plural electrodes
JPH06503203A (ja) * 1991-01-09 1994-04-07 ウエルチ．アリン．インコーポレイテッド 低ワット金属ハロゲン化物ランプ装置
AU777640B2 (en) * 2000-03-28 2004-10-28 Robert Bosch Gmbh Gas discharge lamp with ignition assisting electrodes, especially for automobile headlights
JP2003017283A (ja) * 2001-06-29 2003-01-17 Ushio Inc 光源装置
US6639365B2 (en) * 2001-09-21 2003-10-28 Infocus Corporation Ultra-compact arc discharge lamp system with an additional electrode

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066243A (en) * 1959-11-02 1962-11-27 Engelhard Hanovia Inc Starting and operating circuit for high pressure arc lamps
US3376470A (en) * 1965-08-12 1968-04-02 Atomic Energy Commission Usa Capacitor discharge circuit for starting and sustaining a welding arc
US3403293A (en) * 1966-07-29 1968-09-24 Philco Ford Corp Starter circuit for three-electrode gaseous discharge device
JPS5410850B2 (ja) * 1972-06-06 1979-05-10
US4008414A (en) * 1975-07-28 1977-02-15 Power Saver Corporation Circuit for powering fluorescent lamps
NL183973B (nl) * 1976-05-05 1988-10-03 Philips Nv Metaaldampontladingslamp.
NL7809907A (nl) * 1978-10-02 1980-04-08 Philips Nv Menglichtinrichting.
JPS5551630A (en) * 1978-10-09 1980-04-15 Ichikoh Ind Ltd Illuminator
US4322658A (en) * 1980-03-19 1982-03-30 General Electric Company High intensity discharge lamp containing electronic starting aid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2476130C1 (ru) * 2012-02-27 2013-02-27 Александр Геннадьевич Арзамасцев Устройство для предохранения обуви от скольжения

Also Published As

Publication number Publication date
DE3245923A1 (de) 1984-06-14
JPS59117094A (ja) 1984-07-06
ATE27528T1 (de) 1987-06-15
DE3371851D1 (en) 1987-07-02
CA1216884A (en) 1987-01-20
US4539513A (en) 1985-09-03
EP0111373A1 (de) 1984-06-20

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