Process and apparatus for the homogeneous, electromagnetic induc

Details Process and apparatus for the homogeneous, electromagnetic induc Process and apparatus for the homogeneous, electromagnetic induc

1982-07-07

1984-11-20

Albrtton, C. L.

Electric heating

Metal heating

Of cylinders

219 1061R, 219 1067, 219 1077, 219 1079, H05B 600

Patent

active

044840489

ABSTRACT:
A process and apparatus for inductive heating of flat, thin, conductive, nonmagnetic products of variable dimensions. A plurality of currents are inductively generated in the product in such a way that elementary current arrays are formed in the product in both the longitudinal and lateral directions. Current arrays of local heating heterogeneity, each comprising at least one of the elementary current arrays, are defined, and the intensities of the inductively generated current in the arrays of local heating heterogeneity are controlled as a function of the volume of the array of local heating heterogeneity with which they are associated, so that the average value of power dissipated per unit volume in each array of local heating heterogeneity is approximately the same as for all other arrays. The apparatus specifically includes an inductor with individually controllable coils (poles) arranged to extend longitudinally and laterally over the area of the product to be heated. The positions of the boundaries of the product, together with other product data and desired heating data, are used to control the individual coils of the inductor so as to control the currents induced in the product as a function of the relative positions of the product boundaries and the individual coils.

REFERENCES:
patent: 2448009 (1948-08-01), Baker
patent: 2556223 (1951-06-01), Schnure, Jr.
patent: 2902572 (1959-09-01), Lackner et al.
patent: 3041434 (1962-06-01), Alf
patent: 3781506 (1973-12-01), Ketchum et al.
patent: 4054770 (1977-10-01), Jackson et al.
patent: 4122321 (1978-10-01), Cachat
patent: 4307276 (1981-12-01), Kurata et al.
patent: 4321444 (1982-03-01), Davies

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