High frequency induction heating circuit

Details High frequency induction heating circuit High frequency induction heating circuit

1979-09-19

1982-01-05

Rubinson, Gene Z.

Electric heating

Metal heating

Of cylinders

219 1053, 219 1071, H05B 606

Patent

active

043095860

ABSTRACT:
A high frequency induction heating circuit for heating a plurality of articles where the heating circuit has a semiconductor oscillation circuit which includes a series resonance circuit having a heating coil and a condensor. A detection circuit for detecting changes in impedance and frequency variations in the heating coil is included as well as a current control circuit which is responsive to the detection circuit. A varible control gain regulation apparatus is included in the current control circuit such that current supplied to the coil becomes a non-constant current control depending on the number of articles to be heated.

REFERENCES:
patent: 2709740 (1955-05-01), Baker
patent: 2818483 (1957-12-01), Blume
patent: 3686460 (1972-08-01), Lamparter et al.
patent: 3806688 (1974-04-01), MacKenzie et al.
patent: 3880599 (1975-04-01), Keller
patent: 3930193 (1975-12-01), Kornrumpf et al.
patent: 4085300 (1978-04-01), MacKenzie et al.
patent: 4162379 (1979-07-01), Sebens et al.

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