GB705677A - Improvements in and relating to magnetic amplifiers - Google Patents
Improvements in and relating to magnetic amplifiersInfo
- 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
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.
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)
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)
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 |
-
1950
- 1950-02-28 US US146847A patent/US2578405A/en not_active Expired - Lifetime
-
1951
- 1951-02-20 GB GB4116/51A patent/GB705677A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2578405A (en) | 1951-12-11 |
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