Electric fan motor and a method for producing the same

Details Electric fan motor and a method for producing the same Electric fan motor and a method for producing the same

1990-10-01

1992-01-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 44, 310271, 29598, H02K 1512, H02K 906, H02K 1503

Patent

active

050830520

ABSTRACT:
An electric rotary machine such as a motor has a rotor having a plurality of poles, a stator having a plurality of poles confronting the poles of the rotor in a radial direction, and a casing, for the rotor, having a cylindrical portion which extends in an axial direction. A permanent magnet composed of a mixed material of magnetic powder and a binder being a thermosetting resin constitutes the poles of the rotor. The permanent magnet, which is ring-shaped, is mounted in the casing along an inner circumference of the cylindrical portion of the casing in a circumferential direction. A yoke member is mounted around an outer circumference of the cylindrical portion of the casing, and a plurality of openings penetrate the cylindrical portion and the yoke member at the same time. The permanent magnet has a plurality of projections monolithically formed on its outer circumference. The projections are fitted in the respective openings in the yoke member and cylindrical portion.

REFERENCES:
patent: 4320080 (1982-03-01), Esper et al.
patent: 4434546 (1984-03-01), Hershberger
patent: 4686400 (1987-08-01), Fujisaki et al.
patent: 4689163 (1987-08-01), Yamashita et al.
patent: 4773829 (1988-09-01), Vettori
patent: 4810572 (1989-03-01), Ooe et al.
patent: 4845837 (1989-07-01), Lloyd
patent: 4934041 (1990-06-01), Hoover et al.
patent: 4939398 (1990-07-01), Lloyd

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