GB705677A - Improvements in and relating to magnetic amplifiers - Google Patents

Improvements in and relating to magnetic amplifiers

Info

Publication number
GB705677A
GB705677A GB4116/51A GB411651A GB705677A GB 705677 A GB705677 A GB 705677A GB 4116/51 A GB4116/51 A GB 4116/51A GB 411651 A GB411651 A GB 411651A GB 705677 A GB705677 A GB 705677A
Authority
GB
United Kingdom
Prior art keywords
winding
rectifier
magnetic
stage
magnetic amplifier
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
GB4116/51A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB705677A publication Critical patent/GB705677A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F9/00—Magnetic amplifiers
    • H03F9/04—Magnetic amplifiers voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Combustion (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

705,677. Automatic temperature control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 20, 1951 [Feb. 28, 1950], No. 4116/51. Class 38 (4) In a system involving two stages of magnetic amplification in which the output of the first stage is applied through a rectifier to the second stage, fluctuation of the A.C. supply voltage associated with the output circuits of the stages is arranged to have an opposite effect on each stage, and rectifiers associated with the input control winding and an opposing bias winding are matched to render the final output independent of A.C. voltage fluctuations. To maintain the temperature of a room above a predetermined value a bimetal strip 12, located in the room, moves away from a stop 16 upon fall in temperature below the predetermined value, unbalancing reactances 14, 15 by movement of a magnetic core 13, and thereby energizing, through a rectifier 23, a D.C. input winding 21 of a magnetic amplifier 18 by unbalancing a network associated with an A.C. supply 7, 8. Winding 21 opposes a D.C. bias winding 22 energized through a rectifier 33 from A.C. supply 7, 8. The reactance of A.C. windings 19, 20 on magnetic amplifier 18 is thus increased to decrease, through a rectifier 39, the energization from A.C. source 7, 8 to a D.C. input winding 37 of a second magnetic amplifier 34. Winding 37 opposes a D.C. bias winding 38 energized through a rectifier 9 from A.C. source 7, 8. The reactance of A.C. windings 35, 36 on magnetic amplifier 34 is thus decreased to increase, through a rectifier 45, the D.C. output to terminals 4 to which is connected apparatus (not shown) which thereupon opens the fuel valve of a gas furnace heating the room. In addition to the degree of inherent compensation for voltage variations of A.C. source 7, 8 provided by having two magnetic amplifiers whose outputs respectively decrease and increase, improved compensation is obtained by arranging that rectifiers 23 and 33 have identical characteristics and carry approximately the same currents.
GB4116/51A 1950-02-28 1951-02-20 Improvements in and relating to magnetic amplifiers Expired GB705677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US146847A US2578405A (en) 1950-02-28 1950-02-28 Magnetic amplifier

Publications (1)

Publication Number Publication Date
GB705677A true GB705677A (en) 1954-03-17

Family

ID=22519230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4116/51A Expired GB705677A (en) 1950-02-28 1951-02-20 Improvements in and relating to magnetic amplifiers

Country Status (2)

Country Link
US (1) US2578405A (en)
GB (1) GB705677A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767372A (en) * 1952-10-14 1956-10-16 Sperry Rand Corp Multistage magnetic amplifier system
US2759142A (en) * 1953-04-07 1956-08-14 Bell Telephone Labor Inc Transistor and electromagnetic control apparatus
BE528890A (en) * 1953-05-18

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1710755A (en) * 1927-12-09 1929-04-30 Westinghouse Electric & Mfg Co Generator-voltage regulator
US1957208A (en) * 1932-05-10 1934-05-01 Gen Electric Electric drive
US2079466A (en) * 1934-07-20 1937-05-04 Gen Electric Electrical control system
US2374012A (en) * 1943-05-20 1945-04-17 Westinghouse Electric & Mfg Co Voltage regulating system
US2409610A (en) * 1945-01-31 1946-10-22 Donald R Middleton Voltage regulation
US2464639A (en) * 1945-04-13 1949-03-15 Leeds & Northrup Co Magnetic amplifier
US2453470A (en) * 1945-12-07 1948-11-09 Ward Leonard Electric Co Electric controlling apparatus

Also Published As

Publication number Publication date
US2578405A (en) 1951-12-11

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