Induction heating apparatus with load detecting and control circ

Details Induction heating apparatus with load detecting and control circ Induction heating apparatus with load detecting and control circ

1977-06-22

1980-07-01

Kozma, Thomas J.

Electric heating

Metal heating

Of cylinders

219 1077, 363 19, H05B 504

Patent

active

042107920

ABSTRACT:
The induction heating apparatus comprises a DC source, a series oscillation circuit including a heating coil and a capacitor connected across the DC source, a diode having an opposite polarity with respect to the polarity of the DC source and connected in parallel with the capacitor and a transistor having a collector-emitter path connected in parallel with the capacitor. The conduction state of the transistor is controlled by a control circuit responsive to the output of a current detector which detects the direction and magnitude of the current flowing through the heating coil.

REFERENCES:
patent: 3530370 (1970-09-01), Yamachi et al.
patent: 3596165 (1971-07-01), Andrews
patent: 4016392 (1977-04-01), Kobayashi et al.
patent: 4055740 (1977-10-01), Nakamura et al.
patent: 4074101 (1978-02-01), Kiuchi et al.

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