Radio frequency induction heating device

Details Radio frequency induction heating device Radio frequency induction heating device

1982-11-08

1985-07-02

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1043, 219 1071, 219 1079, H05B 640

Patent

active

045270325

ABSTRACT:
A radio frequency induction heater for locally heating a metallic work piece. The induction heater comprises an elongated conductor surrounded by a core of magnetic material having a narrow slot formed therein serving as the inductor core air gap. The conductor is connected across a source of radio frequency current. The induction heater is located adjacent the metallic work piece with the inductor core air gap very near (and preferably in contact with) that portion of the metallic work piece to be heated. When the radio frequency current is caused to pass through the conductor, the gap concentrates the flux entering the work piece, inducing voltages in the work piece resulting in eddy currents which flow in the work piece along and parallel to the gap. This, in turn, results in the rapid local heating of a narrow band of the work piece.

REFERENCES:
patent: 2361517 (1944-10-01), White et al.
patent: 2762892 (1956-09-01), Park
patent: 2777041 (1957-01-01), Dustman
patent: 3185810 (1965-05-01), Peschel et al.
patent: 3242299 (1966-03-01), Laughlin et al.
patent: 3444346 (1969-05-01), Russell et al.
patent: 3842234 (1974-10-01), Seyfried
patent: 4292489 (1981-09-01), Gerber

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