Electric motor using permanent field magnets

Details Electric motor using permanent field magnets Electric motor using permanent field magnets

1997-07-15

1999-02-09

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, 310258, 310260, 310 60, H02K 510

Patent

active

058699139

ABSTRACT:
In an electric motor comprising a plurality of permanent magnets (46) surrounding a motor armature (52) for supplying field flux to the armature, a cylindrical magnet cover (47) is fitted into an inner circumferential surface defined by the permanent magnets to protect the permanent magnets against chipping and other damages. The magnet cover is further provided with a radial flange (47b) having guide holes (47c) formed therein so that set bolts (48) passed axially inside the motor casings may be favorably guided as they are inserted from one axial end of the motor casing to the other. Preferably, to better guide the bolts, the guide holes may be each provided with a cylindrical guide boss (50, 51) which may be formed either by burring or cutting and lifting a part of the material of the flange.

REFERENCES:
patent: 2911549 (1959-11-01), Culk
patent: 5698914 (1997-12-01), Shiga et al.

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