GB669283A - Improvements in or relating to arrangements for operating an electric discharge lamp from a d.c. supply - Google Patents

Improvements in or relating to arrangements for operating an electric discharge lamp from a d.c. supply

Info

Publication number
GB669283A
GB669283A GB1891548A GB1891548A GB669283A GB 669283 A GB669283 A GB 669283A GB 1891548 A GB1891548 A GB 1891548A GB 1891548 A GB1891548 A GB 1891548A GB 669283 A GB669283 A GB 669283A
Authority
GB
United Kingdom
Prior art keywords
lamp
characteristic
operating
electric discharge
generator
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.)
Expired
Application number
GB1891548A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1891548A priority Critical patent/GB669283A/en
Publication of GB669283A publication Critical patent/GB669283A/en
Expired 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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/231—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for high-pressure lamps

Abstract

669,283. Exciting dynamo-electric machines; supply systems for space discharge lamps. GENERAL ELECTRIC CO., Ltd., NELSON, E. H., and WILLOUGHBY, A. H. Jan. 26, 1950 [July 14, 1948], No. 18915/48. Drawings to Specification. Classes 35 and 38 (iv). In order to dispense with the resistive ballast usually provided in the operating circuit of an electric discharge device, particularly a highpressure lamp, supplied from a D.C. generator the latter is arranged to have a steeply-falling voltage-current characteristic such that the slope about the operating point on the voltagecurrent characteristic of the lamp is greater than that of the lamp characteristic and thereby ensures stability. The generator preferably comprises specially shaped interpoles acting as main flux diverters to obtain the required falling characteristic and a transformer having its primary connected in the lamp operating circuit and its secondary in series voltage opposition with the shunt exciting field is preferably included to ensure stable operation against transient fluctuations in the output current.
GB1891548A 1948-07-14 1948-07-14 Improvements in or relating to arrangements for operating an electric discharge lamp from a d.c. supply Expired GB669283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1891548A GB669283A (en) 1948-07-14 1948-07-14 Improvements in or relating to arrangements for operating an electric discharge lamp from a d.c. supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1891548A GB669283A (en) 1948-07-14 1948-07-14 Improvements in or relating to arrangements for operating an electric discharge lamp from a d.c. supply

Publications (1)

Publication Number Publication Date
GB669283A true GB669283A (en) 1952-04-02

Family

ID=10120621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1891548A Expired GB669283A (en) 1948-07-14 1948-07-14 Improvements in or relating to arrangements for operating an electric discharge lamp from a d.c. supply

Country Status (1)

Country Link
GB (1) GB669283A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1134760B (en) * 1960-01-18 1962-08-16 Patra Patent Treuhand Circuit arrangement for operating high-pressure discharge lamps with rectangular current pulses
GB2316555A (en) * 1996-08-15 1998-02-25 Marathon Electric Mfg Alternator assembly with inherent ballast impedance characteristic for operating a lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1134760B (en) * 1960-01-18 1962-08-16 Patra Patent Treuhand Circuit arrangement for operating high-pressure discharge lamps with rectangular current pulses
GB2316555A (en) * 1996-08-15 1998-02-25 Marathon Electric Mfg Alternator assembly with inherent ballast impedance characteristic for operating a lamp

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