Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1977-05-31
1979-03-27
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 68R, 310198, H02K 900
Patent
active
041468040
ABSTRACT:
Iron or other ferromagnetic material is utilized in the rotor core of a dynamoelectric machine having a superconductive field winding. A parallel connection arrangement of the winding in combination with a plurality of current dividing resistance elements provides a sinusoidal distribution of current density across the circumference of the rotor. The magnetic field associated with the sinusoidal current distribution is reduced in critical interior regions of the winding by the demagnetizing field produced by the magnetic poles of the ferromagnetic core, thereby allowing a larger current to flow in the winding without destroying superconductivity. The two fields add in regions exterior to the winding, thereby providing a net increase in the useful external field obtained from a given amount of superconductive material.
REFERENCES:
patent: 3242418 (1966-03-01), Mela
patent: 3470396 (1969-09-01), Kafka
patent: 3679920 (1972-07-01), MacNab
patent: 3743867 (1973-07-01), Smith
patent: 3781578 (1973-12-01), Smith
patent: 3956648 (1976-05-01), Kirtley
patent: 3999091 (1976-12-01), Kirtley
patent: 4063122 (1977-12-01), Kullmann
Keen J. W.
Skudy R.
Westinghouse Electric Corp.
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