EP0411618A3 - Electronic ballast for gas discharge lamps - Google Patents

Electronic ballast for gas discharge lamps Download PDF

Info

Publication number
EP0411618A3
EP0411618A3 EP19900114792 EP90114792A EP0411618A3 EP 0411618 A3 EP0411618 A3 EP 0411618A3 EP 19900114792 EP19900114792 EP 19900114792 EP 90114792 A EP90114792 A EP 90114792A EP 0411618 A3 EP0411618 A3 EP 0411618A3
Authority
EP
European Patent Office
Prior art keywords
signal
switch
circuit part
voltage
gas discharge
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
EP19900114792
Other languages
German (de)
Other versions
EP0411618A2 (en
EP0411618B1 (en
Inventor
Wolfgang Dr. Pabst
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.)
Zumtobel AG
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
Publication of EP0411618A2 publication Critical patent/EP0411618A2/en
Publication of EP0411618A3 publication Critical patent/EP0411618A3/en
Application granted granted Critical
Publication of EP0411618B1 publication Critical patent/EP0411618B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B41/26—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>
EP90114792A 1989-08-04 1990-08-01 Electronic ballast for gas discharge lamps Expired - Lifetime EP0411618B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3925899A DE3925899A1 (en) 1989-08-04 1989-08-04 ELECTRONIC CONTROLLER FOR GAS DISCHARGE LAMPS
DE3925899 1989-08-04

Publications (3)

Publication Number Publication Date
EP0411618A2 EP0411618A2 (en) 1991-02-06
EP0411618A3 true EP0411618A3 (en) 1992-07-22
EP0411618B1 EP0411618B1 (en) 1994-03-02

Family

ID=6386555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114792A Expired - Lifetime EP0411618B1 (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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117192A (en) * 1982-02-26 1983-10-05 Transtar Limited Lamp control circuit
US4538095A (en) * 1983-06-03 1985-08-27 Nilssen Ole K Series-resonant electronic ballast circuit
WO1986006921A1 (en) * 1985-05-14 1986-11-20 Zumtobel Aktiengesellschaft Protection circuit for an inverter
FR2625642A1 (en) * 1987-12-31 1989-07-07 Courier De Mere Henri Electronic ballast with high power factor
DE4002334A1 (en) * 1989-01-26 1990-08-02 Koito Mfg Co Ltd Electric lamp lighting circuit with protection against overload - includes protective switch opened automatically on de-energisation of relay coil in series with manual lighting switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117192A (en) * 1982-02-26 1983-10-05 Transtar Limited Lamp control circuit
US4538095A (en) * 1983-06-03 1985-08-27 Nilssen Ole K Series-resonant electronic ballast circuit
WO1986006921A1 (en) * 1985-05-14 1986-11-20 Zumtobel Aktiengesellschaft Protection circuit for an inverter
FR2625642A1 (en) * 1987-12-31 1989-07-07 Courier De Mere Henri Electronic ballast with high power factor
DE4002334A1 (en) * 1989-01-26 1990-08-02 Koito Mfg Co Ltd Electric lamp lighting circuit with protection against overload - includes protective switch opened automatically on de-energisation of relay coil in series with manual lighting switch

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
NO903421L (en) 1991-02-05
NO177210B (en) 1995-04-24
EP0411618A2 (en) 1991-02-06
FI96657B (en) 1996-04-15
ATE102429T1 (en) 1994-03-15
DE59004747D1 (en) 1994-04-07
FI96657C (en) 1996-07-25
FI903809A0 (en) 1990-07-31
EP0411618B1 (en) 1994-03-02

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