ATE143208T1 - CIRCUIT ARRANGEMENT FOR OPERATING SEVERAL FLUORESCENT LAMPS WITH ONE BALLAST - Google Patents

CIRCUIT ARRANGEMENT FOR OPERATING SEVERAL FLUORESCENT LAMPS WITH ONE BALLAST

Info

Publication number
ATE143208T1
ATE143208T1 AT92103567T AT92103567T ATE143208T1 AT E143208 T1 ATE143208 T1 AT E143208T1 AT 92103567 T AT92103567 T AT 92103567T AT 92103567 T AT92103567 T AT 92103567T AT E143208 T1 ATE143208 T1 AT E143208T1
Authority
AT
Austria
Prior art keywords
fluorescent lamps
lamp
ballast
defect
circuit arrangement
Prior art date
Application number
AT92103567T
Other languages
German (de)
Inventor
Juergen Dipl-Ing Klier
Bernhard Dipl-Ing Orben
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of ATE143208T1 publication Critical patent/ATE143208T1/en

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
    • H05B41/26—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
    • H05B41/282—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
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/29—Circuits providing for substitution of the light source in case of its failure

Abstract

If a single electronic ballast (1, 2, 3) is used for the joint operation of at least two fluorescent lamps (LL1, LL2), then, even in the event of one fluorescent lamp being deactivated in the case of a defect, the operation of the other fluorescent lamps is intended to be maintained without defect. For this purpose, a switching device (S1, 5) is arranged between the individual fluorescent lamps and lamp inductors (DR1, DR2) allocated individually to them. This switching device (S1, 5) is triggered by a defect condition, in the case of which the starting voltage is applied to one of the fluorescent lamps for longer than a predetermined time interval (t1). On switching over, the lamp circuits are jointly connected to only one of the lamp inductors. A single series-resonant circuit is formed from the two series-resonant circuits of the two lamp circuits, in which single series-resonant circuit it is irrelevant which of the fluorescent lamps is deactivated, and no high starting voltage occurs as long as only one of the fluorescent lamps is illuminated. <IMAGE>
AT92103567T 1992-03-02 1992-03-02 CIRCUIT ARRANGEMENT FOR OPERATING SEVERAL FLUORESCENT LAMPS WITH ONE BALLAST ATE143208T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92103567A EP0558772B1 (en) 1992-03-02 1992-03-02 Circuit arrangement for operating several fluorescent lamps with one ballast

Publications (1)

Publication Number Publication Date
ATE143208T1 true ATE143208T1 (en) 1996-10-15

Family

ID=8209388

Family Applications (1)

Application Number Title Priority Date Filing Date
AT92103567T ATE143208T1 (en) 1992-03-02 1992-03-02 CIRCUIT ARRANGEMENT FOR OPERATING SEVERAL FLUORESCENT LAMPS WITH ONE BALLAST

Country Status (3)

Country Link
EP (1) EP0558772B1 (en)
AT (1) ATE143208T1 (en)
DE (1) DE59207186D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW266383B (en) * 1994-07-19 1995-12-21 Siemens Ag Method of starting at least one fluorescent lamp by an electronic ballast and the electronic ballast used therefor
EP0746185B1 (en) 1995-05-31 1999-07-28 Siemens Aktiengesellschaft Monitoring circuit for a two lamp system
DE19816815C1 (en) * 1998-04-16 1999-11-11 Vossloh Schwabe Gmbh Ballast for operating a plurality of discharge lamps
FI106426B (en) * 1999-03-31 2001-01-31 Innoware Oy Ballast for fluorescent lamps
FI112773B (en) * 2002-04-30 2003-12-31 Teknoware Oy Method and arrangement in connection with a connection device and a connection device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146683B1 (en) * 1981-07-31 1987-11-19 Siemens Aktiengesellschaft Dc-ac conventer
DE3247863A1 (en) * 1982-12-23 1984-06-28 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR SWITCHING OFF A INVERTER
DE3608615A1 (en) * 1986-03-14 1987-09-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh CIRCUIT ARRANGEMENT FOR OPERATING LOW-PRESSURE DISCHARGE LAMPS

Also Published As

Publication number Publication date
EP0558772B1 (en) 1996-09-18
DE59207186D1 (en) 1996-10-24
EP0558772A1 (en) 1993-09-08

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee