GB791236A - Improvements relating to bridge circuits particularly for stabilising a.c. voltages - Google Patents
Improvements relating to bridge circuits particularly for stabilising a.c. voltagesInfo
- Publication number
- GB791236A GB791236A GB37680/54A GB3768054A GB791236A GB 791236 A GB791236 A GB 791236A GB 37680/54 A GB37680/54 A GB 37680/54A GB 3768054 A GB3768054 A GB 3768054A GB 791236 A GB791236 A GB 791236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- output
- voltage
- lamps
- output voltage
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
791,236. Automatic voltage control systems. GENERAL ELECTRIC CO. Dec. 30, 1954 [Dec. 30, 1953], No. 37680/54. Class 38 (4). [Also in Group XXXVI] In an automatic A.C. voltage control system of the kind in which a controlled self-saturating magnetic amplifier is connected in series between the input and output terminals, the output voltage error is detected by a demodulator bridge. In one embodiment, the bridge consists of tungsten filament lamps 11 in two arms, and, in the other arms, linear resistors 12 in series with transformer secondaries 14 which produce a circulating alternating current round the bridge proportional to the system output voltage (from terminal 5). A D.C. bias obtained by rectifying at 17 a portion of the output voltage tapped off the output transformer at 8 is applied to the bridge across diagonal 18. The circulating current due to transformers 14 does not produce any signal across diagonal 25 because of the symmetry of the circuit, but it does control the effective resistance of the lamps 11. The D.C. bias at 18 is adjusted so that for a desired value of output voltage (and corresponding circulating current) the total current both A.C. and D.C. through the lamps 11 causes the bridge to balance. Then any change in output voltage changes the A.C. circulating current (changes in D.C. bias are neglected) thereby changing the effective resistance of the lamps so that the bridge is unbalanced and produces a D.C. output signal across diagonal 25. This voltage controls the main magnetic amplifier 44 which is in series between the input 1 and the output auto-transformer 6 via magnetic amplifiers 28, 29. In a modification, Fig. 2 (not shown), the A.C. control voltage is applied to all bridge elements in parallel via blocking condensers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US401314A US2740936A (en) | 1953-12-30 | 1953-12-30 | Voltage stabilizer and reference circuit therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB791236A true GB791236A (en) | 1958-02-26 |
Family
ID=54707464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37680/54A Expired GB791236A (en) | 1953-12-30 | 1954-12-30 | Improvements relating to bridge circuits particularly for stabilising a.c. voltages |
Country Status (3)
Country | Link |
---|---|
US (1) | US2740936A (en) |
JP (1) | JPS313591B1 (en) |
GB (1) | GB791236A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3152300A (en) * | 1957-02-05 | 1964-10-06 | Superior Electric Co | Sensing circuit having a unidirectional, reversible polarity output signal |
US3068396A (en) * | 1957-03-18 | 1962-12-11 | Superior Electric Co | Automatic voltage regulator |
US2882328A (en) * | 1957-11-12 | 1959-04-14 | Edgar C Worden | Controller for regulating the resistance of a melt |
US3241054A (en) * | 1962-08-21 | 1966-03-15 | Forbro Design Corp | Alternating current voltage regulator utilizing magnetic amplifier circuits |
DE19748146A1 (en) * | 1997-10-31 | 1999-05-06 | Asea Brown Boveri | Three-phase transformer |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2432399A (en) * | 1935-04-24 | 1947-12-09 | Gen Electric | Electrical control device |
US2403891A (en) * | 1941-10-13 | 1946-07-09 | Asea Ab | Load current control |
-
1953
- 1953-12-30 US US401314A patent/US2740936A/en not_active Expired - Lifetime
-
1954
- 1954-12-27 JP JP2863654A patent/JPS313591B1/ja active Pending
- 1954-12-30 GB GB37680/54A patent/GB791236A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS313591B1 (en) | 1956-05-17 |
US2740936A (en) | 1956-04-03 |
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