Current control system for an induction heating apparatus

Details Current control system for an induction heating apparatus Current control system for an induction heating apparatus

1980-05-30

1982-04-27

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219497, 323280, 323281, 307562, 307362, 330110, H05B 608

Patent

active

043272681

ABSTRACT:
Coil current loading the induction coils of an induction heating apparatus is directly sensed at the input from the tank circuit and the derived feedback current signal is used to control the power supply to the tank circuit be reference to a signal provided manually or automatically under process control. A voltage feedback signal is derived with a transformer from the input to the tank circuit for providing an input to a voltage limiter operative on the current controller when the voltage to the tank circuit exceeds an acceptable limit. A current limiter overrides the current controller to limit the load current by control of the current controller when the load becomes excessive.

REFERENCES:
patent: 3094675 (1963-06-01), Ule
patent: 3566151 (1971-02-01), Wilburn
patent: 3686460 (1972-08-01), Lamparter et al.
patent: 3718852 (1973-02-01), Bailey
patent: 3746825 (1973-07-01), Pfaffmann
patent: 3778794 (1973-12-01), Szabo et al.

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