Inductive heating device having a plurality of heating coil unit

Details Inductive heating device having a plurality of heating coil unit Inductive heating device having a plurality of heating coil unit

1982-04-05

1985-03-05

Leung, P. H.

Electric heating

Metal heating

Of cylinders

219 1071, 219 1079, 219 1043, 219 1075, 373144, 373152, 373155, 373157, H05B 644

Patent

active

045033048

ABSTRACT:
An inductive heating device for uniformly heating a workpiece at rest has a plurality of heating coil units disposed so as to surround the workpiece. The heating coil units are connected in parallel to a power source, and a transformer is used to vary the voltage across the terminals of the outermost units to increase the current flowing through these outermost units. The device, therefore, has a very short insufficient heating temperature zone attributable to an end magnetic flux effect.

REFERENCES:
patent: 1980875 (1934-11-01), Northrup
patent: 2452197 (1948-10-01), Kennedy
patent: 3314670 (1967-04-01), Kennedy
patent: 3689726 (1972-09-01), Howell
patent: 4258241 (1981-03-01), Soworowski

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