Induction heating apparatus providing smooth power control

Details Induction heating apparatus providing smooth power control Induction heating apparatus providing smooth power control

1980-05-29

1983-06-28

Paschall, M. H.

Electric heating

Metal heating

Of cylinders

363 97, 363 98, 363132, 323350, H05B 504

Patent

active

043907695

ABSTRACT:
An improved induction heating apparatus comprises a full bridge inverter with each inverter leg fabricated of first and second serially coupled field effect transistors. A control apparatus coupled to the gate of each field effect transistor of each leg alternately renders the first and second field effect transistors of each inverter leg conductive. By varying the phase delay between initiation of alternate conduction of the field effect transistors of one inverter leg and subsequent initiation of alternate conduction of the field effect transistors of the other inverter legs in response to operator commands, smooth induction heating apparatus power control is achieved.

REFERENCES:
patent: 3466528 (1969-09-01), Adams
patent: 3898410 (1975-08-01), Peters, Jr.
patent: 4085300 (1978-04-01), MacKenzie et al.
patent: 4115676 (1978-09-01), Higuchi et al.
patent: 4201957 (1980-05-01), Cathell
patent: 4211912 (1980-07-01), Kiuchi et al.
patent: 4241250 (1980-12-01), Steigerwald
"Principles of Inverter Circuits" by B. D. Bedford & R. G. Hoft, John Wiley & Sons, 1964, pp. 235-238.

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