Electric heating – Metal heating – Of cylinders
Patent
1980-05-30
1982-03-02
Reynolds, B. A.
Electric heating
Metal heating
Of cylinders
219 1075, 219 1049R, 323358, 324127, 336 60, 336174, 336175, H05B 606, H01F 4006
Patent
active
043179797
ABSTRACT:
In an induction heating apparatus, direct sensing of the high frequency high power current flowing in the tank circuit to load the induction coils, is obtained with a coil current measuring transformer comprising one of the power current busses leading to the induction coil and a secondary winding of many ampere-turns wound around said one bus. The bus is given a half-loop shape to accommodate the secondary winding. The secondary winding is made of a magnetic core wound with many turns of Litz wire. Cooling tubes are cemented outside the wound secondary with conductive cement to form a heat sink with a circulation of cooling medium through the tube. The cement is divided in two parts separated by gaps to prevent circulation of induced currents. A cooling tube is installed between the core and wound wire to provide an internal heat sink.
REFERENCES:
patent: 2924796 (1960-02-01), Stauber et al.
patent: 2935589 (1960-05-01), Baer et al.
patent: 3631524 (1971-12-01), Denner
patent: 3663782 (1972-05-01), Emerson
patent: 3746825 (1973-07-01), Pfaffmann
patent: 3946349 (1976-03-01), Haldeman
patent: 3961151 (1976-06-01), Danner
patent: 3990001 (1976-11-01), Schiemann
Billman Erwin A.
Frank William E.
Leung Philip H.
Lorin C. M.
Reynolds B. A.
Westinghouse Electric Corp.
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