GB1167349A - Improvements in or relating to apparatus for Controlling the Position of a Member. - Google Patents
Improvements in or relating to apparatus for Controlling the Position of a Member.Info
- Publication number
- GB1167349A GB1167349A GB5663866A GB5663866A GB1167349A GB 1167349 A GB1167349 A GB 1167349A GB 5663866 A GB5663866 A GB 5663866A GB 5663866 A GB5663866 A GB 5663866A GB 1167349 A GB1167349 A GB 1167349A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- plunger
- derived
- unidirectional
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/121—Control of position or direction using feedback using synchromachines (selsyns)
- G05D3/122—Control of position or direction using feedback using synchromachines (selsyns) without modulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Turbines (AREA)
Abstract
1,167,349. Correspondence control systems. GENERAL ELECTRIC & ENGLISH ELECTRIC COMPANIES Ltd. Nov.17, 1967 [Dec. 19, 1966], No. 56638/66. Heading G1N. In a system for controlling the position of the plunger 1 of a steam valve, an error signal is formed by comparing a signal representing the actual position of the plunger with a signal 11 representing the required position and is amplified in an amplifier 12 energized by a unidirectional voltage derived from the output of the position-sensing means 2 whereby in the event of an open-circuit failure of the position-sensing means or of electric connections thereto said unidirectional voltage falls to zero and hence the signal fed to the electro-mechanical positioning means 13 either falls to zero or assumes a predetermined value such as to leave the plunger in a required safe position. As shown, a unidirectional actual position signal is derived from the difference in the alternating voltages induced in the secondary windings 6 of a rotary differential transformer 2 and the unidirectional voltage for energizing the amplifier 12 is derived from the sum of the alternating voltages induced in the secondary windings 6. A linear differential transformer having E and I cores may be used. The required position signal 11 may be scaled from the output of one or both of the rectifier circuits 15 to avoid inaccuracies due to variations in the alternating voltage applied to the primary winding 5 of the position-sensing transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5663866A GB1167349A (en) | 1966-12-19 | 1966-12-19 | Improvements in or relating to apparatus for Controlling the Position of a Member. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5663866A GB1167349A (en) | 1966-12-19 | 1966-12-19 | Improvements in or relating to apparatus for Controlling the Position of a Member. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1167349A true GB1167349A (en) | 1969-10-15 |
Family
ID=10477149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5663866A Expired GB1167349A (en) | 1966-12-19 | 1966-12-19 | Improvements in or relating to apparatus for Controlling the Position of a Member. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1167349A (en) |
-
1966
- 1966-12-19 GB GB5663866A patent/GB1167349A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |