EP0201624A3 - Ballast circuit for a fluorescent lamp - Google Patents

Ballast circuit for a fluorescent lamp Download PDF

Info

Publication number
EP0201624A3
EP0201624A3 EP85111393A EP85111393A EP0201624A3 EP 0201624 A3 EP0201624 A3 EP 0201624A3 EP 85111393 A EP85111393 A EP 85111393A EP 85111393 A EP85111393 A EP 85111393A EP 0201624 A3 EP0201624 A3 EP 0201624A3
Authority
EP
European Patent Office
Prior art keywords
lamp
current
fluorescent lamp
bridge circuit
current sensor
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Withdrawn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
EP85111393A
Other languages
German (de)
French (fr)
Other versions
EP0201624A2 (en
Inventor
Ferdinand Dipl.-Ing. Mertens
Fred Dr.-Ing. Hasemann
Norbert Dipl.-Ing. Wittig
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.)
Trilux GmbH and Co KG
Original Assignee
Trilux Lenze GmbH and Co KG
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
Priority claimed from DE19853517297 external-priority patent/DE3517297C1/en
Priority claimed from DE19853524681 external-priority patent/DE3524681A1/en
Application filed by Trilux Lenze GmbH and Co KG filed Critical Trilux Lenze GmbH and Co KG
Publication of EP0201624A2 publication Critical patent/EP0201624A2/en
Publication of EP0201624A3 publication Critical patent/EP0201624A3/en
Withdrawn legal-status Critical Current

Links

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
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • 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
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Die Leuchtstofflampe (14) ist in eine Brückenschaltung aus elektronischen Schaltern T₁ bis T₄ geschaltet. Diese Brückenschaltung wird über eine Reihenschaltung aus ein­ em elektronischen Schaltglied (TS), einem Stromfühler (I) und einer Induktivität (L) versorgt. Die Signale des Stromfüh­ lers (I) werden in einem Komparator (16) mit Schwellwerten verglichen. Das Schaltglied (TS) wird abwechselnd geöffnet und geschlossen, so daß der Lampenstrom (iL) innerhalb einer vorgegebenen Bandbreite konstant bleibt. Die Umpo­ lung der Lampe (14) erfolgt von dem Steuerwerk (15) in relativ großen Zeitabständen von z.B. einer Stunde. Während einer Halbperiode des Lampenstroms wird das Zeitintegral dieses Stroms gebildet. Der gegenpolige Strom wird solange aufrechterhalten, bis sein Integral den gleichen Wert erreicht hat. Auf diese Weise wird Kataphorese an der Lampe 14 vermieden. Das Vorschaltgerät ist mit unterschiedlichen Versorgungsspannungen und mit Lampen unterschiedlicher Leistung gleichermaßen betriebbar, ohne Umschaltungen vornehmen zu müssen. The fluorescent lamp (14) is connected in a bridge circuit made of electronic switches T₁ to T₄. This bridge circuit is supplied via a series circuit of an em electronic switching member (T S), a current sensor (I) and an inductance (L). The signals of the current sensor (I) are compared in a comparator (16) with threshold values. The switching element (T S ) is opened and closed alternately, so that the lamp current (i L ) remains constant within a predetermined bandwidth. The Umpo development of the lamp (14) is carried out by the control unit (15) at relatively large intervals of, for example, one hour. The time integral of this current is formed during a half period of the lamp current. The opposite pole current is maintained until its integral has reached the same value. In this way, cataphoresis on the lamp 14 is avoided. The ballast can be operated with different supply voltages and with lamps of different wattages without having to make any switchovers.

EP85111393A 1985-05-14 1985-09-10 Ballast circuit for a fluorescent lamp Withdrawn EP0201624A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3517297 1985-05-14
DE19853517297 DE3517297C1 (en) 1985-05-14 1985-05-14 Ballast for discharge lamps
DE19853524681 DE3524681A1 (en) 1985-07-11 1985-07-11 DIMMER SWITCH FOR AN ELECTRONIC FLUORESCENT LAMP CONTROLLER
DE3524681 1985-07-11

Publications (2)

Publication Number Publication Date
EP0201624A2 EP0201624A2 (en) 1986-11-20
EP0201624A3 true EP0201624A3 (en) 1987-03-25

Family

ID=25832227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111393A Withdrawn EP0201624A3 (en) 1985-05-14 1985-09-10 Ballast circuit for a fluorescent lamp

Country Status (1)

Country Link
EP (1) EP0201624A3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3540985A1 (en) * 1985-11-19 1987-05-21 Philips Patentverwaltung CIRCUIT ARRANGEMENT FOR AC OPERATION OF GAS DISCHARGE LAMPS
NL8800015A (en) * 1988-01-06 1989-08-01 Philips Nv ELECTRICAL DEVICE FOR IGNITION AND POWERING A GAS DISCHARGE LAMP.
GB9027282D0 (en) * 1990-12-17 1991-02-06 Tunewell Transformers Ltd Improvements in or relating to a method of and apparatus for operating an electric discharge lamp
DE19608819C2 (en) * 1996-03-07 1999-09-09 Heraeus Med Gmbh Electrical supply circuit for lamps
DE19758987B4 (en) * 1997-03-04 2017-02-23 Tridonic Gmbh & Co Kg Electronic ballast
DE19757295B4 (en) * 1997-03-04 2005-08-04 Tridonicatco Gmbh & Co. Kg Electronic ballast
DE102008031409A1 (en) * 2008-07-02 2010-01-07 Tridonicatco Gmbh & Co. Kg Detection of the type of a gas discharge lamp connected to an operating device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4260932A (en) * 1978-10-12 1981-04-07 Vance Johnson Method and circuit for facilitating the starting and steady state flickerless operation of a discharge lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4260932A (en) * 1978-10-12 1981-04-07 Vance Johnson Method and circuit for facilitating the starting and steady state flickerless operation of a discharge lamp

Also Published As

Publication number Publication date
EP0201624A2 (en) 1986-11-20

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Effective date: 19910213

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HASEMANN, FRED, DR.-ING.

Inventor name: WITTIG, NORBERT, DIPL.-ING.

Inventor name: MERTENS, FERDINAND, DIPL.-ING.