Transformer-driven shield for electromagnetic casting

Details Transformer-driven shield for electromagnetic casting Transformer-driven shield for electromagnetic casting

1980-01-14

1981-08-25

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

B22D 2702

Patent

active

042853877

ABSTRACT:
An electromagnetic casting process and apparatus utilizing an active transformer-driven copper shield. The shield is actively driven with a voltage out of phase with the voltage in the containment inductor with the result that a bucking current is produced in the shield which is out of phase with the current induced in the shield by the inductor. An active transformer-driven duplex variable impedance shield is also disclosed.

REFERENCES:
patent: 3467166 (1969-09-01), Getselev et al.
patent: 3605865 (1971-09-01), Getselev
patent: 3646988 (1972-03-01), Getselev
patent: 3702155 (1972-11-01), Getselev
patent: 3735799 (1973-05-01), Karlson
patent: 3741280 (1973-06-01), Kozheurou et al.
patent: 3773101 (1973-11-01), Getselev
patent: 3985179 (1976-10-01), Goodrich et al.
patent: 4004631 (1977-01-01), Goodrich et al.
patent: 4135568 (1979-01-01), Brooks
patent: 4215738 (1980-08-01), Gaule et al.

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