Induction cooking apparatus having a ferrite coil support

Details Induction cooking apparatus having a ferrite coil support Induction cooking apparatus having a ferrite coil support

1985-04-03

1986-12-16

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1067, 219 1079, 336 65, 336 84M, H05B 612

Patent

active

046298436

ABSTRACT:
An induction cooking apparatus or a ceramics hob which heats conductive food and/or a conductive pan through hysteresis loss and/or eddy current loss by exciting a coil with high frequency power, comprises a casing, a coil mounted on a coil support, and an insulation cover plate between the coil and food to be cooked. The coil support is made of ferro-magnetic material of mixture of insulation resin and ferrite powder which occupies 75-85 weight %, instead of a prior mere insulation resin so that no flux leaks below the coil support. Preferably, the coil support has a plurality of longitudinal ferrite ribs extending radially under the coil support, and still preferably, the coil support has a plurality of holes at the central portion of the same so that permeability at the central portion is essentially smaller than that at the outer portion to provide uniform flux.

REFERENCES:
patent: 3928744 (1975-12-01), Hibino et al.
patent: 4029926 (1977-06-01), Austin
patent: 4467162 (1984-08-01), Kondo et al.

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