Electric heating – Inductive heating – With power supply system
Patent
1997-12-24
2000-03-28
Leung, Philip H.
Electric heating
Inductive heating
With power supply system
219665, 219626, 363 97, H05B 612, H05B 608
Patent
active
060434708
ABSTRACT:
For use in the heating of foodstuffs by induction, use is made of an energy converter between energy taken from the mains supply via a rectifier and a high frequency oscillation. Such a converter is frequently based on the maintenance of an oscillation in a parallel resonant circuit (CR, LR) which may be disposed in a converter bridge (S1, S2, S3, S4) of controlled switches. It has turned out to enhance the efficiency considerably to let the parallel resonant circuit be series connected to a self-inductance L1 which connects it to the DC source UDC. A series resonant circuit is thereby created which is active during supply of energy and which in a simple fashion reduces the load on the participating switches.
REFERENCES:
patent: 3466528 (1969-09-01), Adams
patent: 4426564 (1984-01-01), Steigerwald et al.
patent: 4900887 (1990-02-01), Keller
patent: 5354971 (1994-10-01), Chen
Aktiebolaget Electrlux
Leung Philip H.
Safran David S.
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