GB966870A - Improvements in or relating to the control of resistive heaters - Google Patents
Improvements in or relating to the control of resistive heatersInfo
- Publication number
- GB966870A GB966870A GB6540/61A GB654061A GB966870A GB 966870 A GB966870 A GB 966870A GB 6540/61 A GB6540/61 A GB 6540/61A GB 654061 A GB654061 A GB 654061A GB 966870 A GB966870 A GB 966870A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heater
- circuit
- resistance
- power source
- power
- 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
- G05D23/2401—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 using a heating element as a sensing element
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
966,870. Automatic temperature control. BELL AEROSPACE CORPORATION. Feb. 22,1961 [Feb. 23, 1960], No. 6540/61. Heading G3R. In an automatic temperature control system wherein the heater circuit comprises a resistive heater, a heater power source and a heater power control, the resistance of the heater is independently measured by means of an isolated circuit and the energization of the heater is varied so as to maintain substantially constant temperature in the heater. As shown, the heater circuit comprises a D.C.power source 1, a power control 3, an A. C. isolation means 4 and a resistive heater 2. The resistance of the heater 2 is measured independently by an isolated circuit comprising D.C. isolation means 11, an A.C. voltage source 12, and a computer 13 which computes any difference between the heater resistance and a preselected reference resistance and relays the error signal to to the power control 3 which varies the energization of the heater 2 to reduce the resistance difference to zero. The A.C. power in the measuring circuit is blocked from the heater circuit by the A.C. isolation means 4; similarly, the D.C. power in the heater circuit is blocked from the measuring circuit by the D.C. isolation means 11. The heater power source may be A.C., and the measuring power source D.C. (Fig.2, not shown); also, the heater power source may be A.C. of one frequency and the measuring power source A.C. of a second frequency (Fig.3, not shown), or the system may include time-sharing electrical energy of the circuits through the heater (Fig.4, not shown). The system may be applied to resistance cooling devices such as Peltier junctions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1037860A | 1960-02-23 | 1960-02-23 | |
| FR853674A FR1282412A (en) | 1960-02-23 | 1961-02-23 | Improvements in methods for adjusting an electric resistance heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB966870A true GB966870A (en) | 1964-08-19 |
Family
ID=62044114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6540/61A Expired GB966870A (en) | 1960-02-23 | 1961-02-22 | Improvements in or relating to the control of resistive heaters |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1282412A (en) |
| GB (1) | GB966870A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067686A2 (en) * | 1981-06-12 | 1982-12-22 | Hitachi, Ltd. | Power supply device for atomizer used in atomic absorptiometer |
| EP0105410A1 (en) * | 1982-09-30 | 1984-04-18 | The B.F. GOODRICH Company | Current circuit monitoring |
| GB2128777A (en) * | 1982-10-04 | 1984-05-02 | Westinghouse Electric Corp | Two wire heater regulator control circuit |
-
1961
- 1961-02-22 GB GB6540/61A patent/GB966870A/en not_active Expired
- 1961-02-23 FR FR853674A patent/FR1282412A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067686A2 (en) * | 1981-06-12 | 1982-12-22 | Hitachi, Ltd. | Power supply device for atomizer used in atomic absorptiometer |
| EP0067686A3 (en) * | 1981-06-12 | 1984-05-16 | Hitachi, Ltd. | Power supply device for atomizer used in atomic absorptiometer |
| EP0105410A1 (en) * | 1982-09-30 | 1984-04-18 | The B.F. GOODRICH Company | Current circuit monitoring |
| GB2128777A (en) * | 1982-10-04 | 1984-05-02 | Westinghouse Electric Corp | Two wire heater regulator control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1282412A (en) | 1962-01-19 |
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