Electric motor with adhesively mounted magnet yoke

Details Electric motor with adhesively mounted magnet yoke Electric motor with adhesively mounted magnet yoke

1991-12-12

1993-11-23

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310 91, 29607, 29DIG1, H02K 1503, H02K 500

Patent

active

052647498

ABSTRACT:
An electric motor having a cylindrical frame with a thickness less than that of conventional electric motors. A tubular inner yoke is inserted in the cylindrical frame and in combination therewith serves as a magnetic path. The total thickness of the cylindrical frame and the inner yoke serves as a magnetic path substantially the same as that of a conventional electric motor frame. The inner yoke and thinner frame construction of the present invention reduces the total weight of the electric motor as compared with conventional electric motors. Additionally, the inner yoke has a plurality of protrusions for positioning the permanent magnets of the electric motor both axially and circumferentially thereon.

REFERENCES:
patent: 3663850 (1972-05-01), Phelon
patent: 3790830 (1974-02-01), Bonfiglio
patent: 4227105 (1980-10-01), Kumakura
patent: 4580072 (1986-04-01), Morishita et al.
patent: 4587449 (1986-05-01), West
patent: 4594525 (1986-06-01), Stokes
patent: 4745319 (1988-05-01), Tomite et al.
patent: 4748358 (1988-05-01), Ruhle et al.
patent: 4795932 (1989-01-01), Long
patent: 4851727 (1989-07-01), Tanaka
patent: 4877986 (1989-10-01), Shimizu
patent: 4933582 (1990-06-01), Hata et al.

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