Permanent magnet structure for use in electric machinery

Details Permanent magnet structure for use in electric machinery Permanent magnet structure for use in electric machinery

1989-11-14

1994-01-18

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, 335306, H02K 2126, H02K 2112, H01F 702

Patent

active

052802094

ABSTRACT:
Magnetically rigid materials are utilized to enhance the field magnitudes oduced by permanent magnet structures that are utilized in electric machinery. Magnetic circuit losses due to unnecessary magnetic fields are eliminated without employing a conventional shunt. The magnetically rigid material is cylindrically configured and magnetized to provide individual magnetic fields between sets of north and south poles on only one cylindrical surface thereof. At least one coaxial cylinder of the magnetically rigid material is included in each permanent magnet structure of the invention and each of the cylinders is constructed from a plurality of segments in one preferred embodiment 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.

REFERENCES:
patent: H693 (1989-10-01), Leupold
patent: 3168686 (1965-02-01), King et al.
patent: 3205415 (1965-09-01), Seki et al.
patent: 3334254 (1967-08-01), Kober
patent: 3768054 (1973-10-01), Neugebauer
patent: 4645961 (1987-02-01), Malsky
patent: 4839059 (1989-06-01), Leupold
patent: 4862128 (1989-08-01), Leupold
patent: 4893103 (1990-01-01), Leupold
patent: 5013951 (1991-05-01), Stadnik

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