GB846479A - Improvements in electric power control systems - Google Patents
Improvements in electric power control systemsInfo
- Publication number
- GB846479A GB846479A GB7720/57A GB772057A GB846479A GB 846479 A GB846479 A GB 846479A GB 7720/57 A GB7720/57 A GB 7720/57A GB 772057 A GB772057 A GB 772057A GB 846479 A GB846479 A GB 846479A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- voltage
- source
- value
- regulator
- 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
- 230000001681 protective effect Effects 0.000 abstract 1
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
- G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using tap transformers or tap changing inductors 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)
- Emergency Protection Circuit Devices (AREA)
Abstract
846,479. Protective systems depending upon two or more sources. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 8, 1957 [March 13, 1956], No. 7720/57. Class 38 (4). An electric control system for governing the supply of power to a load 1 the impedance of which changes from a low value to a high value as a result of current flow therein, for example the heaters of thermionic valves, the load 1 being connected by way of a voltage regulator 19 to a first supply 11 of voltage which has a value substantially less than the normal rated input voltage and subsequently to a second source 13 which has a value equal to the normal input voltage. The change-over from source 11 to source 13 is under the control of a device 29 which imparts a predetermined time interval to the change-over operation by way of a relay CR. The voltage regulator 19 is of a kind which, when the voltage input thereto is from the source 13, will regulate for constant output volts when the load current is between zero and full load value but which, should the load current exceed full load value will cause the output voltage to drop sharply to zero (see curve EIa in Fig. 2). The corresponding regulator curve when the input to the regulator is from the lower voltage source 11 is designated EIb. Thus by first connecting the load to a lowvoltage supply the current inrush to the load while it has low impedance is limited.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US846479XA | 1956-03-13 | 1956-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB846479A true GB846479A (en) | 1960-08-31 |
Family
ID=22186296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7720/57A Expired GB846479A (en) | 1956-03-13 | 1957-03-08 | Improvements in electric power control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB846479A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127240A (en) * | 1982-09-14 | 1984-04-04 | Link 51 Ltd | Power control devices |
-
1957
- 1957-03-08 GB GB7720/57A patent/GB846479A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127240A (en) * | 1982-09-14 | 1984-04-04 | Link 51 Ltd | Power control devices |
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