GB826913A - Improvements in and relating to systems for controlling temperature by electrical heating - Google Patents
Improvements in and relating to systems for controlling temperature by electrical heatingInfo
- Publication number
- GB826913A GB826913A GB1167655A GB1167655A GB826913A GB 826913 A GB826913 A GB 826913A GB 1167655 A GB1167655 A GB 1167655A GB 1167655 A GB1167655 A GB 1167655A GB 826913 A GB826913 A GB 826913A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- amplifier
- controlled
- temperature
- oven
- 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
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
- G05D23/2451—Details of the regulator
- G05D23/2456—Details of the regulator using selfs or transformers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
826,913. Automatic temperature control systems. ENGLISH ELECTRIC CO. Ltd. April 17, 1956 [April 22, 1955], No. 11676/55. Class 38 (4). In an automatic temperature control system the power supplied to an electric heater is controlled through an amplifier by a signal corresponding to the difference between a D.C. reference signal and a D.C. signal dependent on the temperature to be controlled, and is also controlled through a further amplifier by a rate signal, derived through a transformer from the first-mentioned signal. As shown, variations of the temperature of an electrically-heated oven 1 from a value determined by a reference signal applied at 2 are detected by a bridge or other balanced circuit 4 which compares signal 2 with the signal produced by a resistance thermometer or thermocouple 3. Any difference serves to restore oven temperature to the desired value by controlling, through magnetic amplifiers 5 and 6, the energization of a transductor 9 the A.C. winding of which is in series with the oven heaters. To reduce hunting, a transformer 7 develops a signal dependent on the rate of change of the error which also controls transductor 9 after amplification by a further magnetic amplifier 8. Magnetic amplifier 6 serves as an isolating amplifier and has a gain of unity or less. Signal 2 may be in accordance with a programme as in Specification 797,419.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1167655A GB826913A (en) | 1955-04-22 | 1955-04-22 | Improvements in and relating to systems for controlling temperature by electrical heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1167655A GB826913A (en) | 1955-04-22 | 1955-04-22 | Improvements in and relating to systems for controlling temperature by electrical heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB826913A true GB826913A (en) | 1960-01-27 |
Family
ID=9990638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1167655A Expired GB826913A (en) | 1955-04-22 | 1955-04-22 | Improvements in and relating to systems for controlling temperature by electrical heating |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB826913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113727480A (en) * | 2020-05-25 | 2021-11-30 | 中国石油天然气集团有限公司 | Control method and system for output power of electromagnetic heating controller of thermal desorption furnace |
-
1955
- 1955-04-22 GB GB1167655A patent/GB826913A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113727480A (en) * | 2020-05-25 | 2021-11-30 | 中国石油天然气集团有限公司 | Control method and system for output power of electromagnetic heating controller of thermal desorption furnace |
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