GB1493330A - Discharge lamp operating circuit - Google Patents

Discharge lamp operating circuit

Info

Publication number
GB1493330A
GB1493330A GB2504575A GB2504575A GB1493330A GB 1493330 A GB1493330 A GB 1493330A GB 2504575 A GB2504575 A GB 2504575A GB 2504575 A GB2504575 A GB 2504575A GB 1493330 A GB1493330 A GB 1493330A
Authority
GB
United Kingdom
Prior art keywords
supply
lamp
frequency
voltage
rms
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
GB2504575A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2504575A priority Critical patent/GB1493330A/en
Publication of GB1493330A publication Critical patent/GB1493330A/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

1493330 Supply systems for discharge lamps J CATES 11 June 1975 25045/75 Heading H2H A discharge lamp 1 of the high pressure mercury or mercury and metal halide type is energized from a supply 4 of 50 to 60 cycles/ second frequency through a capacitor 2 and choke 3, whose values are chosen so that the capacitive impedance exceeds the inductive impedance at the supply frequency, the value of the RMS voltage across the lamp at supply frequency being chosen such that the ratio of the RMS voltage Vl across the lamp during normal operation thereof to the RMS supply voltage Vm lies within the range 0À85 to 1À05. Various features and advantages of the circuit are discussed with respect to the stability of the lamp during dips in the supply voltage, the factors determining the value of Vl, the operation when using only an inductor as ballast and the use of a stray-field transformer to supply the lamp and an auxiliary electrode or thermal starter to start it. Typical values are given of series capacitance (2), power factor, operating current and running-up time for various lamp ratings and supply voltages.
GB2504575A 1975-06-11 1975-06-11 Discharge lamp operating circuit Expired GB1493330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2504575A GB1493330A (en) 1975-06-11 1975-06-11 Discharge lamp operating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2504575A GB1493330A (en) 1975-06-11 1975-06-11 Discharge lamp operating circuit

Publications (1)

Publication Number Publication Date
GB1493330A true GB1493330A (en) 1977-11-30

Family

ID=10221336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2504575A Expired GB1493330A (en) 1975-06-11 1975-06-11 Discharge lamp operating circuit

Country Status (1)

Country Link
GB (1) GB1493330A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139022A (en) * 1983-04-26 1984-10-31 Gen Electric Ballast circuit for lamps with low voltage gas discharge tubes
US4626745A (en) * 1983-04-26 1986-12-02 General Electric Company Ballast circuit for lamps with low voltage gas discharge tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139022A (en) * 1983-04-26 1984-10-31 Gen Electric Ballast circuit for lamps with low voltage gas discharge tubes
US4626745A (en) * 1983-04-26 1986-12-02 General Electric Company Ballast circuit for lamps with low voltage gas discharge tubes

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee