ATE102429T1 - ELECTRONIC BALLAST FOR GAS DISCHARGE LAMPS. - Google Patents

ELECTRONIC BALLAST FOR GAS DISCHARGE LAMPS.

Info

Publication number
ATE102429T1
ATE102429T1 AT90114792T AT90114792T ATE102429T1 AT E102429 T1 ATE102429 T1 AT E102429T1 AT 90114792 T AT90114792 T AT 90114792T AT 90114792 T AT90114792 T AT 90114792T AT E102429 T1 ATE102429 T1 AT E102429T1
Authority
AT
Austria
Prior art keywords
signal
switch
circuit part
voltage
gas discharge
Prior art date
Application number
AT90114792T
Other languages
German (de)
Inventor
Wolfgang Dr Pabst
Original Assignee
Zumtobel 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 Zumtobel Ag filed Critical Zumtobel Ag
Application granted granted Critical
Publication of ATE102429T1 publication Critical patent/ATE102429T1/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
    • H05B41/295—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
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—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
    • 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
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2983—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions

Abstract

An electronic ballast (1) for gas discharge lamps (2), having an input circuit part (10, 11) for producing an intermediate-circuit DC voltage (Uz) from a supply voltage (L1,N), having an oscillator circuit part (4,8,S1,S2), supplied from the intermediate circuit DC voltage (Uz) for generating an alternating signal (uw) which can be supplied to the gas discharge lamp (2), having a bistable switch-off latching circuit part (3) which supplies a switch-off signal (us) in its first and second stable state to the oscillator circuit part (4,8,S1,S2), and hence releases the oscillator circuit part (4,8,S1,S2) or switches it off, a first signal (u1), derived from the alternating signal (uw), driving the switch-off latching circuit part (3) from its first into its second stable state in the event of a predetermined value being exceeded, and generating the switch-off signal (us), is to be designed such that its operating reliability is further improved. This is achieved in that a further signal (u2), derived from the intermediate circuit DC voltage (Uz), produces the switch-off signal (us) when the intermediate circuit DC voltage (Uz) exceeds a predetermined maximum value. <IMAGE>
AT90114792T 1989-08-04 1990-08-01 ELECTRONIC BALLAST FOR GAS DISCHARGE LAMPS. ATE102429T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3925899A DE3925899A1 (en) 1989-08-04 1989-08-04 ELECTRONIC CONTROLLER FOR GAS DISCHARGE LAMPS

Publications (1)

Publication Number Publication Date
ATE102429T1 true ATE102429T1 (en) 1994-03-15

Family

ID=6386555

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90114792T ATE102429T1 (en) 1989-08-04 1990-08-01 ELECTRONIC BALLAST FOR GAS DISCHARGE LAMPS.

Country Status (7)

Country Link
EP (1) EP0411618B1 (en)
AT (1) ATE102429T1 (en)
DE (2) DE3925899A1 (en)
DK (1) DK0411618T3 (en)
ES (1) ES2050897T3 (en)
FI (1) FI96657C (en)
NO (1) NO177210C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120649A1 (en) * 1991-06-22 1992-12-24 Vossloh Schwabe Gmbh OVERVOLTAGE PROTECTED BALLAST
DE19619580A1 (en) * 1996-05-15 1997-11-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Safety shutdown with asymmetrical lamp power
DE10163034B4 (en) * 2001-12-20 2014-08-28 Tridonic Gmbh & Co Kg Electronic ballast with overvoltage monitoring
DE102004002027B4 (en) 2004-01-14 2020-03-26 Tridonic Gmbh & Co Kg Central PFC with DC output circuit control
DE102005028419A1 (en) * 2005-06-20 2006-12-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Electronic ballast for e.g. coldstarting discharge lamp, has varistor, shutdown device, diode, resistors and integration capacitor connected in parallel for limiting voltage across intermediate circuit capacitor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117192B (en) * 1982-02-26 1986-01-02 Transtar Limited Lamp control circuit
US4538095A (en) * 1983-06-03 1985-08-27 Nilssen Ole K Series-resonant electronic ballast circuit
AT390156B (en) * 1985-05-14 1990-03-26 Zumtobel Ag PROTECTIVE CIRCUIT FOR A INVERTER CIRCUIT
FR2625642A1 (en) * 1987-12-31 1989-07-07 Courier De Mere Henri Electronic ballast with high power factor
US5068570A (en) * 1989-01-26 1991-11-26 Koito Manufacturing Co., Ltd. Lamp lighting circuit with an overload protection capability

Also Published As

Publication number Publication date
ES2050897T3 (en) 1994-06-01
DE3925899A1 (en) 1991-02-07
NO903421D0 (en) 1990-08-03
DK0411618T3 (en) 1994-03-28
NO177210C (en) 1995-08-02
EP0411618A3 (en) 1992-07-22
NO903421L (en) 1991-02-05
NO177210B (en) 1995-04-24
EP0411618A2 (en) 1991-02-06
FI96657B (en) 1996-04-15
DE59004747D1 (en) 1994-04-07
FI96657C (en) 1996-07-25
FI903809A0 (en) 1990-07-31
EP0411618B1 (en) 1994-03-02

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Legal Events

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