ATE53737T1 - ELECTRIC RESISTANCE HEATING ELEMENT WITH TEMPERATURE CONTROL. - Google Patents
ELECTRIC RESISTANCE HEATING ELEMENT WITH TEMPERATURE CONTROL.Info
- Publication number
- ATE53737T1 ATE53737T1 AT81901612T AT81901612T ATE53737T1 AT E53737 T1 ATE53737 T1 AT E53737T1 AT 81901612 T AT81901612 T AT 81901612T AT 81901612 T AT81901612 T AT 81901612T AT E53737 T1 ATE53737 T1 AT E53737T1
- Authority
- AT
- Austria
- Prior art keywords
- heating element
- ferromagnetic material
- temperature
- current
- curie temperature
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
Abstract
There are many situations requiring temperature regulation in heating elements which the prior art feedback control systems are not capable of handling adequately. In order to provide a temperature regulation in a narrow range around the Curie temperature, the heating element of the present invention is consisted of a substrate (35) or core (7) (25) of a nonmagnetic material having high thermal and electrical conductivity, clad with a surface layer (9) (27, 37) of a ferromagnetic material of relatively low electrical conductivity. When the heating element is energized by an electrical source (3) of high frequency alternating current, the skin effect initially confines current flow principally to the surface layer of ferromagnetic material. As temperature rises into the region of the Curie temperature of the ferromagnetic material, however, the decline in magnetic permeability of the ferromagnetic material causes a significant lessening of the skin effect, permitting migration of current into the high conductivity non-magnetic core, thereby simultaneously enlarging the cross-sectional area of the current flow path and expanding it into the highly conductive material; the resistance of the heating element becomes less due to both causes. By selecting the proper frequency for energization, by regulating the source to produce constant current, and by selecting dimensions and material parameters for the heating element, temperature regulation in a narrow range around the Curie temperature of the ferromagnetic material can be produced, despite considerable fluctuations in thermal load.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1981/000278 WO1982003148A1 (en) | 1981-03-02 | 1981-03-02 | Electrically resistive heating element having temperature control |
EP81901612A EP0073190B1 (en) | 1981-03-02 | 1981-03-02 | Electrically resistive heating element having temperature control |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE53737T1 true ATE53737T1 (en) | 1990-06-15 |
Family
ID=22161126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT81901612T ATE53737T1 (en) | 1981-03-02 | 1981-03-02 | ELECTRIC RESISTANCE HEATING ELEMENT WITH TEMPERATURE CONTROL. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0073190B1 (en) |
AT (1) | ATE53737T1 (en) |
DE (1) | DE3177193D1 (en) |
WO (1) | WO1982003148A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4701587A (en) * | 1979-08-31 | 1987-10-20 | Metcal, Inc. | Shielded heating element having intrinsic temperature control |
CA1214815A (en) * | 1982-09-30 | 1986-12-02 | John F. Krumme | Autoregulating electrically shielded heater |
US4752673A (en) * | 1982-12-01 | 1988-06-21 | Metcal, Inc. | Autoregulating heater |
DE3579605D1 (en) * | 1984-03-06 | 1990-10-18 | Metcal Inc | HEAT TREATMENT METHOD BY MEANS OF SELF-REGULATING HEATING DEVICE. |
JP7112426B2 (en) * | 2017-06-28 | 2022-08-03 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | Electrical heating assembly, aerosol generator and method for resistively heating an aerosol-forming substrate |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1975436A (en) * | 1929-11-08 | 1934-10-02 | Ugine Infra | Method of heating by induction and furnace therefor |
US2181274A (en) * | 1938-05-11 | 1939-11-28 | Utilities Coordinated Res Inc | Induction heater construction |
US2513778A (en) * | 1946-11-09 | 1950-07-04 | Chrysler Corp | Heat-treating apparatus |
US3218384A (en) * | 1962-03-29 | 1965-11-16 | Int Nickel Co | Temperature-responsive transmission line conductor for de-icing |
US3660585A (en) * | 1970-06-24 | 1972-05-02 | Robert D Waldron | Frozen shell metal melting means |
US4017344A (en) * | 1973-03-05 | 1977-04-12 | Harold Lorber | Magnetically enhanced coaxial cable with improved time delay characteristics |
FR2233685B1 (en) * | 1973-06-12 | 1977-05-06 | Josse Bernard | |
JPS5247583B2 (en) * | 1974-01-09 | 1977-12-03 | ||
US4091813A (en) * | 1975-03-14 | 1978-05-30 | Robert F. Shaw | Surgical instrument having self-regulated electrical proximity heating of its cutting edge and method of using the same |
-
1981
- 1981-03-02 EP EP81901612A patent/EP0073190B1/en not_active Expired - Lifetime
- 1981-03-02 AT AT81901612T patent/ATE53737T1/en not_active IP Right Cessation
- 1981-03-02 WO PCT/US1981/000278 patent/WO1982003148A1/en active IP Right Grant
- 1981-03-02 DE DE8181901612T patent/DE3177193D1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3177193D1 (en) | 1990-07-19 |
EP0073190B1 (en) | 1990-06-13 |
WO1982003148A1 (en) | 1982-09-16 |
EP0073190A1 (en) | 1983-03-09 |
EP0073190A4 (en) | 1983-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0075010B1 (en) | Shielded heating element having intrinsic temperature control | |
US4256945A (en) | Alternating current electrically resistive heating element having intrinsic temperature control | |
EP0110692B1 (en) | Autoregulating electric heater | |
US4814587A (en) | High power self-regulating heater | |
ES526075A0 (en) | AN ELEMENT FOR A SELF-REGULATING HEATING DEVICE, POINT WITH THIS DEVICE. | |
TW249882B (en) | ||
JPS61501354A (en) | automatic temperature control heater | |
EP0130671A3 (en) | Multiple temperature autoregulating heater | |
US2752434A (en) | Magneto-responsive device | |
DE3876504T2 (en) | AUTOMATICALLY CONTROLLED HEATING. | |
US3087108A (en) | Flux switching transformer | |
ATE53737T1 (en) | ELECTRIC RESISTANCE HEATING ELEMENT WITH TEMPERATURE CONTROL. | |
ES2114658T3 (en) | MANUFACTURING METHOD OF A RADIANT HEATER AND A HEATER MANUFACTURED BY SUCH METHOD. | |
JPS60137077A (en) | Switch for finely regulating continuous current loop of superconductive circuit | |
DE3679728D1 (en) | FERROMAGNETIC ELEMENT WITH TEMPERATURE CONTROL. | |
US5380989A (en) | Inductive heating element with magnetic and thermistor materials | |
Kerner et al. | Field Layers in Semiconductors with Positive Differential Conductivity | |
CA1147381A (en) | Alternating current electrically resistive heating element having intrinsic temperature control | |
US3049683A (en) | Ultra high frequency attenuator | |
JP2546267B2 (en) | Induction heating device | |
JPH0646862B2 (en) | Method and apparatus for controlling flow rate of conductive fluid | |
JPH05326123A (en) | Induction heater plate | |
JPH04206190A (en) | Cooking plate for elecrtomagnetic induction heater | |
EP0487832A2 (en) | Electromagnetic induction heater capable of realizing a wide variety of heating rates | |
JPS54103008A (en) | Vertical type magnetic head and magnetically writing method using the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
UEP | Publication of translation of european patent specification | ||
EELA | Cancelled due to lapse of time |