GB943097A - Improvements in d.c. to d.c. converters - Google Patents

Improvements in d.c. to d.c. converters

Info

Publication number
GB943097A
GB943097A GB4407360A GB4407360A GB943097A GB 943097 A GB943097 A GB 943097A GB 4407360 A GB4407360 A GB 4407360A GB 4407360 A GB4407360 A GB 4407360A GB 943097 A GB943097 A GB 943097A
Authority
GB
United Kingdom
Prior art keywords
capacitor
load
load capacitor
oscillator
coupling capacitor
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
GB4407360A
Inventor
Anthony Stanley Colman
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.)
HALROY PRODUCTS Ltd
Original Assignee
HALROY PRODUCTS Ltd
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 HALROY PRODUCTS Ltd filed Critical HALROY PRODUCTS Ltd
Priority to GB4407360A priority Critical patent/GB943097A/en
Publication of GB943097A publication Critical patent/GB943097A/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
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
    • H02M3/3382—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement in a push-pull circuit arrangement
    • H02M3/3384—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement in a push-pull circuit arrangement of the parallel type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

943,097. Transistor oscillator circuits. HALROY PRODUCTS Ltd. Dec. 22, 1961 [Dec. 22, 1960], No. 44073/60. Heading H3T. [Also in Division H2] In a D.C. to D.C. converter incorporating one or more transistors in an oscillator whose output is fed through a transformer to a rectifying arrangement (e.g. a voltage doubler) including a load capacitor C1 which is charged to a high voltage, a coupling capacitor C2 is connected between the transformer and rectifying arrangement and has a sufficiently high impedance for the transistors not to be cut off but to maintain oscillation at a high level even though the load capacitor presents a very low impedance when the oscillator is switched on. With a load capacitor of 500 ÁF as used in an electronic flash unit, and a coupling capacitor of 0.1 to 0.5 ÁF instead of the conventional value of 10 ÁF the load capacitor may reach 80% full charge in 5 seconds instead of 18 (Figs. 2 and 3, not shown). The secondary winding turns may be increased by about 20%, to compensate for the reduction in load voltage due to the coupling capacitor. Specification 943,044 is referred to.
GB4407360A 1960-12-22 1960-12-22 Improvements in d.c. to d.c. converters Expired GB943097A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4407360A GB943097A (en) 1960-12-22 1960-12-22 Improvements in d.c. to d.c. converters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4407360A GB943097A (en) 1960-12-22 1960-12-22 Improvements in d.c. to d.c. converters

Publications (1)

Publication Number Publication Date
GB943097A true GB943097A (en) 1963-11-27

Family

ID=10431634

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4407360A Expired GB943097A (en) 1960-12-22 1960-12-22 Improvements in d.c. to d.c. converters

Country Status (1)

Country Link
GB (1) GB943097A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137441A (en) * 1983-03-25 1984-10-03 Ferranti Plc Capacitor charging circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137441A (en) * 1983-03-25 1984-10-03 Ferranti Plc Capacitor charging circuit

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