Method and apparatus for minimizing the power induced in a flat

Details Method and apparatus for minimizing the power induced in a flat Method and apparatus for minimizing the power induced in a flat

1983-02-08

1985-05-21

Envall, Jr., Roy N.

Electric heating

Metal heating

Of cylinders

219 1071, 219 1075, 219 1041, 219 1057, H05B 500, H05B 664

Patent

active

045188408

ABSTRACT:
A method and apparatus for minimizing the power induced in a moving or stationary, flat, conducting product which is maintained in position without contact by electromagnetic forces. Inductors on each side of the product subject certain zones of the product to two alternating, essentially equivalent, opposing magnetic fluxes acting perpendicularly to surfaces of the product on opposite sides thereof so that, in each of the zones, with the product in a position of equilibrium, the component of magnetic flux of the resultant field perpendicular to each zone is minimal and the component parallel to each zone is at a maximum, due to the mutual deflection of the two fluxes. Each inductor has a plurality of poles and the opposing fluxes are produced by generating magnetic fields of like polarity in opposing poles of the inductors while generating, in adjacent poles of the inductors themselves, magnetic fields of opposite polarities. The inductors are of various overall configurations and are comprised of poles of various shapes depending upon the type of product involved. The magnitudes of the fluxes of each pair of inductors acting on the different zones may be regulated independently to obtain forces of different intensities in each of the corresponding zones of the product.

REFERENCES:
patent: 3041434 (1962-06-01), Alf
patent: 4122321 (1978-10-01), Cachat
patent: 4321444 (1982-03-01), Davies

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