Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1993-09-30
1994-09-20
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310256, H02K 2112, H02K 2304, H02K 2126
Patent
active
053492587
ABSTRACT:
Magnetic circuit losses due to unnecessary magnetic fields are greatly curtailed or eliminated relative to the permanent magnet structures of electric machinery, without employing a conventional shunt or pole pieces. At least one coaxial cylinder of magnetic material is included in each permanent magnet structure of the invention and is magnetized to provide individual magnetic fields between sets of north and south poles on only one cylindrical surface thereof. Each of the cylinders is constructed from a plurality of segments in one preferred embodiment thereof and magnetically rigid materials are utilized to enhance the field magnitudes in another preferred thereof. Segments having a substantially triangular cross sectional configuration are utilized in other preferred embodiments, while flux contributions from at least three segments combine to sustain each set of north and south poles in still other preferred embodiments.
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Slemon and Straughen, text book titled: "Electric Machines", Oct. 1982, pp. 4-75.
Leupold Herbert A.
Potenziani, II Ernest
LaBalle Clayton E.
O'Meara John M.
Stephan Steven L.
The United States of America as represented by the Secretary of
Zelenka Michael
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