Rapid annealing method using shorted secondary technique

Details Rapid annealing method using shorted secondary technique Rapid annealing method using shorted secondary technique

1991-12-19

1993-10-26

Dean, Richard O.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148121, 148304, 219 1041, 219 1057, 219 1075, C21D 812, H01F 4102

Patent

active

052562115

ABSTRACT:
The present invention is directed to a process for rapidly field annealing ferromagnetic cores and the cores produced thereby. A current is applied across a magnetizing source associated with a magnetizing core which induces a flux/voltage in the ferromagnetic core which is disposed about a leg of the magnetizing core. The flux/voltage in the second core induces a current in the second core which in turn induces a field in, and transverse to the width direction of, the ferromagnetic core. A second field may e applied to the ferromagnetic core during cooling. The cores produced display low core loss and either sheared over or square loop properties which are suitable for current and distribution type transformers respectively.

REFERENCES:
patent: 4726855 (1988-02-01), Tsutsui et al.

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