Electric heating – Metal heating – Of cylinders
Patent
1990-10-15
1991-10-22
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1071, 323328, 323338, H05B 608
Patent
active
050597620
ABSTRACT:
Induction heating apparatus, e.g. for melting, has induction coil sections, each associated with a respective zone of the melt or other work load, the power applied to each section from a supply being controlled individually through a saturable reactor respective to each section and each operable to shunt a proportion of power applicable in that section in response to regulation of excitation of the respective reactor related to a demand signal derived from the operation of the respective zone, so that the temperature in each zone is regulated independently of the regulation of the other zone(s).
REFERENCES:
patent: 3612805 (1971-10-01), Kennedy
patent: 3665149 (1972-05-01), Sakabe et al.
patent: 3740859 (1973-06-01), Patton et al.
patent: 4359620 (1982-11-01), Keller
patent: 4506131 (1985-03-01), Boehm et al.
patent: 4737704 (1988-04-01), Kalinnikov et al.
patent: 4973815 (1990-11-01), Ito et al.
Inductotherm Europe Limited
Leung Philip H.
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