EP0453888A2 - Circuit pour alimenter une lampe fluorescente - Google Patents

Circuit pour alimenter une lampe fluorescente Download PDF

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Publication number
EP0453888A2
EP0453888A2 EP91105758A EP91105758A EP0453888A2 EP 0453888 A2 EP0453888 A2 EP 0453888A2 EP 91105758 A EP91105758 A EP 91105758A EP 91105758 A EP91105758 A EP 91105758A EP 0453888 A2 EP0453888 A2 EP 0453888A2
Authority
EP
European Patent Office
Prior art keywords
voltage
lamp
switch
normal operation
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.)
Ceased
Application number
EP91105758A
Other languages
German (de)
English (en)
Other versions
EP0453888A3 (en
Inventor
Jürgen Ludwig
Gottfried Stockinger
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0453888A2 publication Critical patent/EP0453888A2/fr
Publication of EP0453888A3 publication Critical patent/EP0453888A3/de
Ceased 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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • 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
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac

Definitions

  • the invention relates to a circuit arrangement for the operation of a fluorescent lamp on an AC network, for example an aircraft electrical system, which lights up in normal operation with 100% brightness and in dimming mode with reduced brightness, the lamp being connected upstream of a choke and a switch connected in parallel which is in dimming mode is switched on and off periodically out of phase.
  • the AC line voltage is stepped up by means of a transformer.
  • the object of the invention is to design a circuit arrangement of the type mentioned at the outset such that the lamp can also be operated without a transformer when the AC mains voltage is in the range of the lamp's operating voltage.
  • the choke takes energy from the mains and transmits it to the lamp as a voltage pulse when the switch is opened.
  • the voltage pulse supplements the AC line voltage which is too small at that moment to cover the necessary operating voltage in such a way that the lamp does not go out.
  • the time during which the switch is open and the choke stores energy can be very small in relation to a half-wave.
  • the short interruptions in the lamp's operating voltage are not visible, in particular not in an aircraft electrical system that operates at a frequency of, for example, 400 Hz.
  • the nominal value (effective value) of the burning voltage of the lamp is approx. 100 V for many commercially available fluorescent lamps.
  • An aircraft electrical system for example, works with a nominal voltage (effective value) of 115 V at 400 Hz. It has been shown that the invention also allows for these conditions Lamp can be operated with 100% brightness.
  • the choke and the closing time of the switch are dimensioned such that, even with the smallest AC voltage occurring, the voltage pulse delivered by the choke at the moment mentioned is at least slightly larger than that necessary burning voltage.
  • a fluorescent lamp (1) of the starter lamp type has two ignition electrodes (2, 3) to be heated.
  • the operating voltage of the lamp (1) has a nominal value of 100 V.
  • a throttle (4) is connected upstream of the ignition electrode (2).
  • UN AC system voltage
  • An electronic switch (5) which is controlled by a phase shifter (6), is connected between the ignition electrodes (2, 3).
  • the phase shifter (6) is synchronized with the AC line voltage (UN).
  • An RC element (R, C) is parallel to the switch (5). This reduces the harmonic components that occur when the switch (5) is suddenly opened.
  • the switch (5) If the switch (5) is opened, there is a lamp voltage (UL) between the ignition electrodes (2, 3). The lamp (1) ignites and a lamp current (IL) flows. The opening and closing of the switch (5) is controlled by the phase shifter (6).
  • the switch (5) is closed until time (T0).
  • the choke (4) contains magnetic energy and the ignition electrodes (2, 3) are heated.
  • the switch (5) is opened. It then remains open until time (T1).
  • the lamp voltage (UL) is applied to the lamp (1) and the lamp current (IL) flows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP19910105758 1990-04-26 1991-04-11 Circuit for operating a fluorescent lamp Ceased EP0453888A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904013360 DE4013360A1 (de) 1990-04-26 1990-04-26 Schaltungsanordnung fuer den betrieb einer leuchtstofflampe
DE4013360 1990-04-26

Publications (2)

Publication Number Publication Date
EP0453888A2 true EP0453888A2 (fr) 1991-10-30
EP0453888A3 EP0453888A3 (en) 1993-01-13

Family

ID=6405165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910105758 Ceased EP0453888A3 (en) 1990-04-26 1991-04-11 Circuit for operating a fluorescent lamp

Country Status (2)

Country Link
EP (1) EP0453888A3 (fr)
DE (1) DE4013360A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563716A1 (fr) * 1992-03-30 1993-10-06 Otto Diez Elektromaschinenbau Dispositif à lampe UV
DE4413946A1 (de) * 1993-04-23 1994-10-27 Matsushita Electric Works Ltd Lichtsteuervorrichtung einer Entladungslampe
WO2003043387A1 (fr) * 2001-11-12 2003-05-22 Koninklijke Philips Electronics N.V. Ensemble circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330195A (en) * 1980-02-19 1982-05-18 Xerox Corporation Multiple mode image processing apparatus and method
DE19625077B4 (de) * 1996-06-22 2005-05-19 Diehl Stiftung & Co. Kg Leuchtstofflampen-Vorschaltgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS561757B2 (fr) * 1974-03-30 1981-01-14
NL179622C (nl) * 1978-06-27 1986-10-01 Philips Nv Inrichting voor het ontsteken en voeden van ten minste een gas- en/of dampontladingsbuis.
US4503359A (en) * 1979-09-12 1985-03-05 Hitachi Lighting, Ltd. Discharge lamp lighting device
GB2082359B (en) * 1980-08-18 1984-02-22 Gen Electric Co Ltd Lamp-dimming system
DE3327189A1 (de) * 1983-07-28 1985-02-07 Diehl GmbH & Co, 8500 Nürnberg Schaltungsanordnung fuer das zuenden und fuer die helligkeitssteuerung von leuchtstofflampen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563716A1 (fr) * 1992-03-30 1993-10-06 Otto Diez Elektromaschinenbau Dispositif à lampe UV
DE4413946A1 (de) * 1993-04-23 1994-10-27 Matsushita Electric Works Ltd Lichtsteuervorrichtung einer Entladungslampe
DE4413946B4 (de) * 1993-04-23 2004-08-12 Matsushita Electric Works, Ltd., Kadoma Schaltungsanordnung zum Starten und Betreiben einer Entladungslampe
WO2003043387A1 (fr) * 2001-11-12 2003-05-22 Koninklijke Philips Electronics N.V. Ensemble circuit

Also Published As

Publication number Publication date
DE4013360C2 (fr) 1993-04-08
DE4013360A1 (de) 1991-11-14
EP0453888A3 (en) 1993-01-13

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