ATE71244T1 - HIGH FREQUENCY BALLAST FOR GAS DISCHARGE LAMPS. - Google Patents

HIGH FREQUENCY BALLAST FOR GAS DISCHARGE LAMPS.

Info

Publication number
ATE71244T1
ATE71244T1 AT87302692T AT87302692T ATE71244T1 AT E71244 T1 ATE71244 T1 AT E71244T1 AT 87302692 T AT87302692 T AT 87302692T AT 87302692 T AT87302692 T AT 87302692T AT E71244 T1 ATE71244 T1 AT E71244T1
Authority
AT
Austria
Prior art keywords
frequency
varies
current
discharge lamps
load circuit
Prior art date
Application number
AT87302692T
Other languages
German (de)
Inventor
Thomas E Dean
William H Henrich
David M Fischer
Lawrence J Stratton
Original Assignee
Thomas Industries Inc
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 Thomas Industries Inc filed Critical Thomas Industries Inc
Application granted granted Critical
Publication of ATE71244T1 publication Critical patent/ATE71244T1/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
    • H05B41/2856—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit 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
    • H05B41/282—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
    • H05B41/2858—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions

Abstract

An electronic frequency inverter circuit receives input electrical power at a lower frequency and energizes a load circuit (35) including gaseous discharge lamps (36,37) in a range of higher frequencies. First and second semiconductors (30,31) are operated alternately by a logic circuit (40) in current mode control such that the switches operate at the higher frequency range and the frequency of current in the load circuit varies as the magnitude of said source voltage varies. The load circuit has an impedance (38) which varies with frequency such that the peak amplitude of the load current remains substantially constant despite variations in the magnitude of said source voltage to achieve a desirable crest factor for the lamp current.
AT87302692T 1986-03-28 1987-03-27 HIGH FREQUENCY BALLAST FOR GAS DISCHARGE LAMPS. ATE71244T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84585386A 1986-03-28 1986-03-28
EP87302692A EP0239420B1 (en) 1986-03-28 1987-03-27 High frequency ballast for gaseous discharge lamps

Publications (1)

Publication Number Publication Date
ATE71244T1 true ATE71244T1 (en) 1992-01-15

Family

ID=25296241

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87302692T ATE71244T1 (en) 1986-03-28 1987-03-27 HIGH FREQUENCY BALLAST FOR GAS DISCHARGE LAMPS.

Country Status (6)

Country Link
EP (1) EP0239420B1 (en)
JP (1) JPS63999A (en)
AT (1) ATE71244T1 (en)
AU (1) AU609388B2 (en)
CA (1) CA1327991C (en)
DE (1) DE3775588D1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873471A (en) * 1986-03-28 1989-10-10 Thomas Industries Inc. High frequency ballast for gaseous discharge lamps
JPH07118394B2 (en) * 1987-06-15 1995-12-18 松下電工株式会社 Discharge lamp lighting device
DE3742921A1 (en) * 1987-12-17 1989-06-29 Pintsch Bamag Ag CONTROL UNIT FOR A DISCHARGE LAMP
JPH01186790A (en) * 1988-01-18 1989-07-26 Mitsubishi Electric Corp Lighting device for discharge lamp
EP0392834B1 (en) * 1989-04-14 1995-02-15 TLG plc Ballast circuits for gas discharge lamps
US5345164A (en) * 1993-04-27 1994-09-06 Metcal, Inc. Power factor corrected DC power supply
EP0677982B1 (en) * 1994-04-15 2000-02-09 Knobel Ag Lichttechnische Komponenten Process for operating a discharge lamp ballast
US6172468B1 (en) 1997-01-14 2001-01-09 Metrolight Ltd. Method and apparatus for igniting a gas discharge lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637251A5 (en) * 1978-12-22 1983-07-15 Contrinex Sa POWER SUPPLY ARRANGEMENT FOR SUPPLYING AN INDUCTIVE OR OHMIC-INDUCTIVE LOAD.
DE3142613A1 (en) * 1981-10-28 1983-05-05 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for starting and operating a low-pressure mercury-vapour discharge lamp
DE3149526A1 (en) * 1981-12-14 1983-06-23 Philips Patentverwaltung CIRCUIT ARRANGEMENT FOR OPERATING HIGH PRESSURE GAS DISCHARGE LAMPS
NL8201631A (en) * 1982-04-20 1983-11-16 Philips Nv DC AC CONVERTER FOR IGNITION AND AC POWERING A GAS AND / OR VAPOR DISCHARGE LAMP.
US4560908A (en) * 1982-05-27 1985-12-24 North American Philips Corporation High-frequency oscillator-inverter ballast circuit for discharge lamps
US4873471A (en) * 1986-03-28 1989-10-10 Thomas Industries Inc. High frequency ballast for gaseous discharge lamps

Also Published As

Publication number Publication date
EP0239420A1 (en) 1987-09-30
AU609388B2 (en) 1991-05-02
AU7067187A (en) 1987-10-01
DE3775588D1 (en) 1992-02-13
EP0239420B1 (en) 1992-01-02
CA1327991C (en) 1994-03-22
JPS63999A (en) 1988-01-05

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EEIH Change in the person of patent owner
REN Ceased due to non-payment of the annual fee