Degaussing system for bulk demagnetization of previously magneti

Details Degaussing system for bulk demagnetization of previously magneti Degaussing system for bulk demagnetization of previously magneti

1985-02-27

1986-10-14

Gellner, Michael L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361205, 361267, H01F 1300

Patent

active

046176039

ABSTRACT:
The item to be demagnetized is placed in a chamber surrounded by electrical windings defining a pair of coils that are disposed in a mutually orthogonal configuration. Currents for the two coils are developed in a microprocessor-controlled inverter circuit and are applied through semiconductor switches in such a way that the resulting demagnetizing field is rotating and follows a predetermined amplitude variation in accordance with one or more profiles stored in the memory of the microprocessor.

REFERENCES:
patent: 4158873 (1979-06-01), Schroeder et al.
patent: 4360854 (1982-11-01), Schergen et al.
patent: 4373174 (1983-02-01), Akesson
patent: 4384313 (1983-05-01), Steingroever et al.
patent: 4423460 (1983-12-01), Jackson et al.

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