Miniature motor and method of making same

Details Miniature motor and method of making same Miniature motor and method of making same

1993-05-14

1995-05-02

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, 310 89, H02K 504

Patent

active

054122678

ABSTRACT:
A miniature motor including a motor case formed into a bottomed hollow cylindrical shape having a cross-sectional shape having two long sides consisting of two parallel lines (planar portions) and two short sides. An end bracket is fitted to an open end of the motor case. Permanent magnets are fixedly fitted to the cylindrical inside surface of the motor case. The inside surfaces of the permanent magnets, when assembled, form part of a cylindrical surface. An armature is rotatably supported in the motor case via bearings provided on the motor case and the end bracket. Recesses are provided on the inside of the parallel planar portions of the motor case and positioned in such a manner that a gap g.sub.1 between the inside surfaces of the recesses and the armature is related to a gap g.sub.2 between the inside surfaces of the permanent magnets and the armature by a relationship that g.sub.1 g.sub.2. A method is further proposed of making the motor in which the recesses are formed by ironing.

REFERENCES:
patent: 4409505 (1983-10-01), Petersen

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