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GB873791A - Improvements in electric lamp starting and ballast circuits - Google Patents

Improvements in electric lamp starting and ballast circuits

Info

Publication number
GB873791A
GB873791A GB35542/58A GB3554258A GB873791A GB 873791 A GB873791 A GB 873791A GB 35542/58 A GB35542/58 A GB 35542/58A GB 3554258 A GB3554258 A GB 3554258A GB 873791 A GB873791 A GB 873791A
Authority
GB
United Kingdom
Prior art keywords
section
secondary winding
limb
primary winding
winding
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
GB35542/58A
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
Original Assignee
General Electric Co
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 filed Critical General Electric Co
Publication of GB873791A publication Critical patent/GB873791A/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
    • H05B41/232—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 low-pressure lamps
    • H05B41/2325—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 low-pressure lamps provided with pre-heating electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

873,791. Supply systems for space discharge lamps; transformers. GENERAL ELECTRIC CO. Nov. 5, 1958 [Nov. 20, 1957], No. 35542/58. Classes 38 (2) and 38 (4)] A starting and ballasting circuit for an electric discharge lamp 16 connected in series with a capacitor 18 comprises a high-reactance transformer 1 having a magnetic core on the centre limb of which are wound the primary winding 2 and the secondary winding 3, the section 5 of the centre limb on which is placed the secondary winding 3 being arranged to have a reduced cross-section compared with the section 4 of the limb over which is placed the primary winding 2, the dimensions of the section 5 having the reduced cross-section being such that the section is magnetically saturated during part of each cycle of the supply voltage and with an open circuit on the secondary winding. The discharge lamp 16 is connected to a tapping 15 on the primary winding 2, the connection of the secondary winding 3 being such that the secondary winding 3 and part of the primary winding are in voltage opposition. The cross-section of the section 5 of the centre limb is preferably 40 to 80% of the section 4 of the limb and the length of the restricted cross-section is between 25 and 35% of the mean length of the secondary magnetic circuit. The magnetizing inductance when the restricted section is saturated is equal to 4 to 20% of the capacitive reactance of the capacitor 18 of the supply frequency.
GB35542/58A 1957-11-20 1958-11-05 Improvements in electric lamp starting and ballast circuits Expired GB873791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US873791XA 1957-11-20 1957-11-20

Publications (1)

Publication Number Publication Date
GB873791A true GB873791A (en) 1961-07-26

Family

ID=22204835

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35542/58A Expired GB873791A (en) 1957-11-20 1958-11-05 Improvements in electric lamp starting and ballast circuits

Country Status (1)

Country Link
GB (1) GB873791A (en)

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