Electric heating – Inductive heating – Specific heating application
Patent
1992-02-06
1994-05-03
Reynolds, Bruce A.
Electric heating
Inductive heating
Specific heating application
219646, 219653, 219672, 219624, H05B 506
Patent
active
053089464
ABSTRACT:
This disclosure relates to an apparatus for and a method of electrical inductance heating of metal strips and slabs. The heating method involves a plurality of pairs of individual electrical coils exposed on opposite sides of a path of movement of a metal strip or slab wherein the coils are elongated longitudinally of the path of movement of the metal member, such as a strip or slab, whereby the pattern of heating is in the way of stripes. Further, to eliminate any pulsing of current within the strip or slab being heated, each coil is spaced from a transversely adjacent coil a distance corresponding substantially to the effective heating width of that coil. The coils of a next longitudinal adjacent set of coils are transversely offset relative to the coils of the first mentioned set of coils so that each coil of the second set is aligned with a space between coils of the first set. This provides for a heating of the strip or slab in stripes and prevents overheating of the edges of the strip or slab. Further, the energization of the individual coils may be controlled in accordance with the existing temperature of that area of a strip or slab to be heated by the coils so as to heat a non-uniformly heated strip or slab to a uniform overall temperature.
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Brown Charles E.
Hoang Tu
Reynolds Bruce A.
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