Annular segment permanent magnet single air gap electric motor

Details Annular segment permanent magnet single air gap electric motor Annular segment permanent magnet single air gap electric motor

1979-08-30

1981-08-11

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 2128

Patent

active

042836476

ABSTRACT:
A single air gap permanent magnet electric motor is provided with field magnets formed as thick annular segments concentric with the axis of rotation of a solid non-magnetic cylindrical armature. The field magnets are magnetized radially to the axis and have oppositely polarized pole faces facing the axis. The ratio of the thickness to the inner diameter of the annular segments is maintained within a defined range to provide for a high magnetic flux density across the single air gap.

REFERENCES:
patent: 3102964 (1963-09-01), Bennett et al.
patent: 3335309 (1967-08-01), Hansen
patent: 3553509 (1971-01-01), Schellekens
patent: 3891876 (1975-06-01), Herr et al.
patent: 3906268 (1975-09-01), de Graffenried
patent: 4181866 (1980-01-01), Morisawa

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