Electric heating – Inductive heating – With heat exchange
Patent
1995-11-15
1997-09-09
Leung, Philip H.
Electric heating
Inductive heating
With heat exchange
219626, 219622, 219665, H05B 606, H05B 612
Patent
active
056652631
ABSTRACT:
An induction cooking heater includes at least one inductor, a high-frequency current generator and a magnetic circuit located beneath the inductor. The reluctance of the magnetic circuit is calibrated so that the magnetic circuit gets saturated from a predetermined temperature lower than the maximum permissible temperature for the inductor. A plate made of non-magnetic, electrically conductive material located beneath the magnetic circuit, gives rise to an increase in current in the inductor when the magnetic circuit starts getting saturated. The generator is then controlled by a regulator for limiting the value of the current in the inductor to deliver lower power to the inductor.
REFERENCES:
patent: 3996442 (1976-12-01), Moreland, II et al.
patent: 4013859 (1977-03-01), Peters, Jr.
patent: 4029926 (1977-06-01), Austin
patent: 4055740 (1977-10-01), Nakamura et al.
patent: 4317016 (1982-02-01), Ito
patent: 4348571 (1982-09-01), Dills et al.
patent: 4467162 (1984-08-01), Kondo et al.
patent: 4506131 (1985-03-01), Boehm et al.
Patent Abstracts of Japan, vol. 018 No. 063 (E-1500), Feb. 2, 1994 & JP-A-05 283154 (Fuji MC:KK) Oct. 29, 1993--abridged.
C E P E M
Leung Philip H.
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