Induction heating apparatus using a saturable reactor for power

Details Induction heating apparatus using a saturable reactor for power Induction heating apparatus using a saturable reactor for power

1976-03-15

1977-10-25

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1077, 323 45, 323 51, 363 91, H05B 504

Patent

active

040557405

ABSTRACT:
An induction heating apparatus includes a saturable reactor having a pair of rectangular ferrite cores. An air gap is provided in each ferrite core to provide a gradually increasing saturation characteristic on the magnetization curve of the cores. A pair of series-connected load windings is coiled around each core and a control winding is coiled around a common magnetic path of the cores. A power control circuit produces a DC control current that passes through the control winding. The high frequency energization current is passed through the load windings. Means are provided to control the DC control current at a desired setting. Preferably, the actual power level is detected to control the DC current through a feedback loop.

REFERENCES:
patent: 2399185 (1946-04-01), Hedding
patent: 2825024 (1958-02-01), Berghoff
patent: 2830256 (1958-04-01), Bale
patent: 3178696 (1965-04-01), Claflin
patent: 3596172 (1971-07-01), Harrison
patent: 3716719 (1973-02-01), Angeleny et al.
patent: 3806792 (1974-04-01), Untamo
patent: 3978307 (1976-08-01), Amagami et al.

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