EP0378992A1 - Circuit de commande de lampes à décharge - Google Patents

Circuit de commande de lampes à décharge Download PDF

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Publication number
EP0378992A1
EP0378992A1 EP90100027A EP90100027A EP0378992A1 EP 0378992 A1 EP0378992 A1 EP 0378992A1 EP 90100027 A EP90100027 A EP 90100027A EP 90100027 A EP90100027 A EP 90100027A EP 0378992 A1 EP0378992 A1 EP 0378992A1
Authority
EP
European Patent Office
Prior art keywords
circuit
relay
lamp
ptc thermistor
series
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
EP90100027A
Other languages
German (de)
English (en)
Other versions
EP0378992B1 (fr
Inventor
Anton Zuchtriegel
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 EP0378992A1 publication Critical patent/EP0378992A1/fr
Application granted granted Critical
Publication of EP0378992B1 publication Critical patent/EP0378992B1/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
    • H05B41/26—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
    • H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
    • 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
    • Y10S315/05—Starting and operating circuit for fluorescent lamp

Definitions

  • the invention relates to a circuit arrangement for high-frequency operation of one or more low-pressure discharge lamps connected in series in accordance with the preamble of claim 1.
  • Such a circuit arrangement for igniting a low-pressure discharge lamp is listed in DE-OS 34 41 992.
  • the circuit arrangement includes a further capacitor in parallel with the PTC thermistor.
  • the PTC thermistor When a mains voltage is applied to the circuit arrangement, the PTC thermistor has a low resistance and thus enables a preheating current to flow through the two electrodes of the lamp.
  • the PTC thermistor is heated by the current flow and changes into a high-resistance state after a period of time characteristic of the respective PTC thermistor. This interrupts the preheating of the electrodes and the lamp can be ignited by the resonance circuit.
  • the PTC thermistor enables sufficient and quick preheating of the electrodes and reliable ignition of the lamp.
  • the PTC thermistor is heated for the entire duration of the lamp after the ignition. This results in relatively high energy losses due to the long burning times for fluorescent lamps.
  • the permanent heating of the PTC thermistor represents an additional thermal load on the circuit arrangement, which can lead to premature failure of a circuit part, in particular the PTC thermistor itself.
  • the object of the invention is to provide a circuit arrangement which prevents further heating of the PTC thermistor after the low-pressure discharge lamp or lamps have been ignited, so as to keep the power loss of the circuit arrangement low.
  • the number of circuit elements required for this shutdown should be as small as possible so that the circuit arrangement can also be easily integrated into small device housings.
  • the relay uses the switch to deactivate the PTC thermistor if the electrodes have been preheated sufficiently. So far, it has been known to control complex contacts, such as e.g. RC circuits to use as a timer.
  • the circuit arrangement according to the invention does not require such circuits, since the PTC thermistor to be switched off itself - by transition to the high-resistance state - serves as a time constant element for the normally closed contact relay.
  • the relay is connected in parallel with the PTC thermistor in the heating circuit via a rectifier. It is also in a the supply lines between the PTC thermistor and the AC input of the relay rectifier, a capacitor is used to set the relay switching voltage. Another capacitor in parallel with the DC output of the relay rectifier has the task of screening the DC voltage if low-noise direct current is required to operate the relay.
  • the PTC thermistor in multiple functions as a preheating element and time constant element, an optimal preheating time, a quick and glow phase-free lamp ignition and a high system efficiency are achieved in the circuit arrangement according to the invention.
  • the relay remains switched on during the operating period of the lamp or lamps, ie as long as the push-pull frequency generator oscillates.
  • the PTC thermistor cools down immediately after being switched off by the relay when starting the lamp. Thus, if the device is switched off within a few minutes and then switched on again, a new preheating with subsequent good ignition is guaranteed.
  • a circuit arrangement for operating a fluorescent lamp LP is shown.
  • the circuit includes a high-frequency filter 1, a rectifier arrangement 2, a smoothing capacitor C1 and a push-pull frequency generator with two alternating switching transistors T1, T2, emitter resistors R1, R2 and a control circuit 3.
  • the push-pull frequency generator is self-controlling, the control voltage being generated by a toroidal transformer TR with a primary winding is obtained in the operating circuit and one secondary winding each in the basic controls of the transistors T1, T2.
  • the circuit arrangement has a series resonance circuit with an inductance L1, a coupling capacitor C2 and a resonance capacitor C3.
  • the resonance inductance L1 and the coupling capacitor C2 are placed in series with the toroidal transformer TR in the operating circuit between the center tap M and the first electrode E1 of the lamp LP and the resonance capacitor C3 in the heating circuit of the lamp LP.
  • the second electrode E2 of the low-pressure discharge lamp LP is connected on the network side to the positive pole of the rectifier arrangement 2.
  • a PTC thermistor KL and a switch S of a relay RL are placed in the heating circuit.
  • a relay rectifier GL with its AC inputs is connected in parallel with the PTC thermistor KL and the switch S, a capacitor C4 also being placed in a supply line.
  • the DC outputs of the relay rectifier GL are connected to the relay RL, in which the switch S is integrated.
  • a capacitor C5 is connected in parallel with the DC output of the relay rectifier GL.
  • FIG. 2 shows a circuit arrangement according to the invention for operating two series connected Fluorescent lamps LP1, LP2 reproduced.
  • the structure of the basic circuit and the circuit for switching off the PTC thermistor KL correspond to the circuit shown in Figure 1, here the first electrode E1 of the first lamp LP1 with the center tap M and the second electrode E2 'of the second lamp LP2 with the positive pole of the rectifier arrangement 2 is connected.
  • the two middle electrodes E2 and E1 'of the lamp LP1 and lamp LP2 are combined to form a separate heating circuit which supplies the electrodes with current through a secondary winding L2' at the resonance inductor L1 '.
  • the heating circuit also includes a switch S 'integrated in the relay RL, which is opened by the relay RL. This makes it possible to use the relay RL, which is controlled by the PTC thermistor KL, to interrupt the preheating currents of all the electrodes at the same time if there is sufficient preheating to ignite the lamp.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP90100027A 1989-01-16 1990-01-02 Circuit de commande de lampes à décharge Expired - Lifetime EP0378992B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901111 1989-01-16
DE3901111A DE3901111A1 (de) 1989-01-16 1989-01-16 Schaltungsanordnung zum betrieb von entladungslampen

Publications (2)

Publication Number Publication Date
EP0378992A1 true EP0378992A1 (fr) 1990-07-25
EP0378992B1 EP0378992B1 (fr) 1993-08-25

Family

ID=6372176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100027A Expired - Lifetime EP0378992B1 (fr) 1989-01-16 1990-01-02 Circuit de commande de lampes à décharge

Country Status (4)

Country Link
US (1) US5027033A (fr)
EP (1) EP0378992B1 (fr)
JP (1) JP2846025B2 (fr)
DE (2) DE3901111A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007070A1 (fr) * 1989-10-26 1991-05-16 Skyline Holding Ag Circuit de prechauffage pour lampes a fluorescence
EP0693864A3 (fr) * 1994-07-21 1997-12-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une ou plusieurs lampes à décharge basse-pression
EP1424880A2 (fr) * 2002-11-13 2004-06-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Appareil pour alimenter des lampes à décharge
EP1601237A2 (fr) 2004-05-26 2005-11-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast avec circuit de contrôle pour l' alimentation permanente d' une lampe à décharge

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005850A1 (de) * 1990-02-23 1991-08-29 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer entladungslampe
DE4025938A1 (de) * 1990-08-16 1992-02-20 Diehl Gmbh & Co Schaltungsanordnung fuer den betrieb einer leuchtstofflampe
DE4119775A1 (de) * 1991-06-15 1992-12-17 Vossloh Schwabe Gmbh Vorschaltgeraet mit gesteuerter heizzeit
DE4121009C2 (de) * 1991-06-21 1994-01-13 Prolux Maschinenbau Gmbh Schaltungsanordnung zum Betrieb einer Entladungslampe
DE4140557A1 (de) * 1991-12-09 1993-06-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer oder mehrerer niederdruckentladungslampen
US5444333A (en) * 1993-05-26 1995-08-22 Lights Of America, Inc. Electronic ballast circuit for a fluorescent light
US5483125A (en) * 1993-12-06 1996-01-09 General Electric Company Ballast circuit for a gas discharge lamp having a cathode pre-heat arrangement
JPH07161483A (ja) * 1993-12-13 1995-06-23 U R D:Kk 蛍光灯装置
DE9404469U1 (de) * 1994-03-16 1994-11-10 Trilux Lenze Gmbh & Co Kg Mehrlampen-Vorschaltgerät für Entladungslampen
US5656891A (en) * 1994-10-13 1997-08-12 Tridonic Bauelemente Gmbh Gas discharge lamp ballast with heating control circuit and method of operating same
DE19524386B4 (de) * 1995-07-04 2005-10-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Stabförmige elektrische Leuchte
BE1009717A3 (nl) * 1995-10-20 1997-07-01 Philips Electronics Nv Schakelinrichting.
DE10125510A1 (de) * 2001-05-23 2002-12-05 Innolux Gmbh Leuchtstofflampenschaltung
US7586268B2 (en) * 2005-12-09 2009-09-08 Lutron Electronics Co., Inc. Apparatus and method for controlling the filament voltage in an electronic dimming ballast
CN101206709B (zh) * 2006-12-22 2010-06-23 晨星半导体股份有限公司 读取状态保持电路及读取状态保持方法
DE102007054806A1 (de) * 2007-11-16 2009-05-20 Tridonicatco Schweiz Ag Betriebsschaltung für in Serie geschaltete Leuchtmittel, insbesondere HID-Gasentladungslampen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446579A1 (fr) * 1978-11-10 1980-08-08 Abadie Henri Perfectionnements aux dispositifs d'alimentation de tube fluorescent
DE3441992A1 (de) * 1984-11-16 1986-05-22 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Schaltungsanordnung zur zuendung einer niederdruckentladungslampe
EP0259646A1 (fr) * 1986-08-19 1988-03-16 Siemens Aktiengesellschaft Méthode et moyens pour alimenter une lampe à d'écharge dans le gaz

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941822A1 (de) * 1979-10-16 1981-04-30 Patra Patent Treuhand Vorschaltanordnung zum betreiben von niederdruckentladungslampen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446579A1 (fr) * 1978-11-10 1980-08-08 Abadie Henri Perfectionnements aux dispositifs d'alimentation de tube fluorescent
DE3441992A1 (de) * 1984-11-16 1986-05-22 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Schaltungsanordnung zur zuendung einer niederdruckentladungslampe
EP0259646A1 (fr) * 1986-08-19 1988-03-16 Siemens Aktiengesellschaft Méthode et moyens pour alimenter une lampe à d'écharge dans le gaz

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007070A1 (fr) * 1989-10-26 1991-05-16 Skyline Holding Ag Circuit de prechauffage pour lampes a fluorescence
AU638068B2 (en) * 1989-10-26 1993-06-17 Skyline Holding Ag Preheater circuit for fluorescent lamps
EP0693864A3 (fr) * 1994-07-21 1997-12-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une ou plusieurs lampes à décharge basse-pression
EP1424880A2 (fr) * 2002-11-13 2004-06-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Appareil pour alimenter des lampes à décharge
EP1424880A3 (fr) * 2002-11-13 2008-03-19 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Appareil pour alimenter des lampes à décharge
EP1601237A2 (fr) 2004-05-26 2005-11-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast avec circuit de contrôle pour l' alimentation permanente d' une lampe à décharge
EP1601237A3 (fr) * 2004-05-26 2009-07-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast avec circuit de contrôle pour l' alimentation permanente d' une lampe à décharge

Also Published As

Publication number Publication date
JPH02227998A (ja) 1990-09-11
US5027033A (en) 1991-06-25
EP0378992B1 (fr) 1993-08-25
DE3901111A1 (de) 1990-07-19
DE59002409D1 (de) 1993-09-30
JP2846025B2 (ja) 1999-01-13

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