Induction heater coupling control by core saturation

Details Induction heater coupling control by core saturation Induction heater coupling control by core saturation

1988-05-17

1989-06-27

Pellinen, A. D.

Electric heating

Metal heating

Of cylinders

219 1061A, 219 1075, 219 1077, 219 1079, 336 73, H05B 500, H05B 600, H05B 664

Patent

active

048432016

ABSTRACT:
An induction heater comprising an alternating-current-carrying conductor (1) extending along an axis; a plurality of core sections (3, 4, 5) arranged in line and each substantially encircling the axis to guide magnetic flux resulting from the alternating current in the conductor (1); a plurality of heating element sections respectively associated with the core sections and each comprising an electrically conductive closed loop encircling magnetic flux in the associated core section (3, 4, 5) and being heated by electrical current induced thereby; and means (13, 14) to at least partially saturate at least one (4, 5) of the core sections thereby to reduce the coupling between the conductor (1) and the heating element section associated with said one core section (4, 5) and thus control the heating effected by said one core section (4, 5) and its associated heating element section (FIG. 4).

REFERENCES:
patent: 3107268 (1963-10-01), Kraus
patent: 4256945 (1981-03-01), Carter et al.
patent: 4265922 (1981-05-01), Tsuchiya et al.
patent: 4629844 (1986-12-01), Griffeth et al.

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