Electromagnetic induction heating apparatus capable of heating n

Details Electromagnetic induction heating apparatus capable of heating n Electromagnetic induction heating apparatus capable of heating n

1983-09-09

1985-10-22

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1049R, 219 1079, H05B 612

Patent

active

045490562

ABSTRACT:
In an electromagnetic induction heating apparatus, a cooking vessel made of a nonmagnetic metal, which has conventionally been incapable of magnetic inducting heating, is provided adjacent a heating coil which applies an alternating field with a high-frequency of at least 50 kHz. An inverter circuit for supplying the heating coil with a high-frequency current operates in response to an output signal from a detector which automatically detects the magnetic characteristics of the metallic material of the cooking vessel. As the high-frequency magnetic field is applied, a skin effect is produced within the metallic material of the vessel, so that the impedance for the magnetic field of the vessel is substantially fixed without regard to the wall thickness of the vessel.

REFERENCES:
patent: 1900842 (1933-03-01), Northrup
patent: 3057985 (1962-10-01), Biringer
patent: 3781505 (1973-12-01), Steigerwald
patent: 3786222 (1974-01-01), Harnden, Jr. et al.
patent: 3966426 (1976-06-01), McCoy et al.
patent: 4013859 (1977-03-01), Peters, Jr.
patent: 4029926 (1977-06-01), Austin
patent: 4092510 (1978-05-01), Kiuchi et al.
patent: 4296295 (1981-10-01), Kiuchi
patent: 4354082 (1982-10-01), Tellert et al.
patent: 4356371 (1982-10-01), Kiuchi et al.

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