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GB1412985A - Electric power supply circuits - Google Patents

Electric power supply circuits

Info

Publication number
GB1412985A
GB1412985A GB5042672A GB5042672A GB1412985A GB 1412985 A GB1412985 A GB 1412985A GB 5042672 A GB5042672 A GB 5042672A GB 5042672 A GB5042672 A GB 5042672A GB 1412985 A GB1412985 A GB 1412985A
Authority
GB
United Kingdom
Prior art keywords
transformer
signal
oscillator
transistor
output
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
GB5042672A
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.)
G&E Bradley Ltd
Original Assignee
G&E Bradley 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 G&E Bradley Ltd filed Critical G&E Bradley Ltd
Priority to GB5042672A priority Critical patent/GB1412985A/en
Publication of GB1412985A publication Critical patent/GB1412985A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop

Landscapes

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

Abstract

1412985 Automatic voltage control G & E BRADLEY Ltd 26 Oct 1973 [1 Nov 1972] 50426/72 Heading G3R [Also in Division H2] A regulated power supply comprises a transformer whose primary winding energization is controlled by a switch operated by the output signal of an oscillator. The frequency of the oscillator is determined by a signal derived from a feedback winding on the transformer core, and the oscillator output is in the form of constant width pulses. As shown, battery input terminals 12, 13 are connected across primary winding 18 of transformer 19 and a switching transistor 17. The transformer also includes a number of secondary windings (21-24), Fig.2 (not shown), with associated rectifiers to produce different DC voltage levels, an electrostatic screen 67, a gapped ferrite core 20 and a feedback winding 25, the signal from which is compared with a Zener reference diode 27 and fed to an amplifier 28. The amplified signal controls the level of current delivered by a constant current source 26 which in turn controls the spacing of constant width pulses produced by an astable multi-vibrator 14. The pulses are amplified by transistor stages 30, 31 to form the control signal for transistor 17 such that the output voltage levels produced by the transformer are maintained constant.
GB5042672A 1972-11-01 1972-11-01 Electric power supply circuits Expired GB1412985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5042672A GB1412985A (en) 1972-11-01 1972-11-01 Electric power supply circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5042672A GB1412985A (en) 1972-11-01 1972-11-01 Electric power supply circuits

Publications (1)

Publication Number Publication Date
GB1412985A true GB1412985A (en) 1975-11-05

Family

ID=10455857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5042672A Expired GB1412985A (en) 1972-11-01 1972-11-01 Electric power supply circuits

Country Status (1)

Country Link
GB (1) GB1412985A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380044A (en) 1979-10-04 1983-04-12 Imperial Chemical Industries Plc D.C. to d.c. converter with plural feedback loops

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380044A (en) 1979-10-04 1983-04-12 Imperial Chemical Industries Plc D.C. to d.c. converter with plural feedback loops

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Legal Events

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