Miniature motor

Details Miniature motor Miniature motor

1993-03-25

1994-05-24

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, H02K 2126

Patent

active

053151917

ABSTRACT:
A miniature motor having a housing formed into a bottomed hollow cylindrical shape. The inner circumferential surface to which a pair of permanent magnets, which are rare-earth plastic magnets of an essentially C shape in cross section, are fixedly fitted. An end cap is fitted to an open end of the housing, and a rotor is rotatably supported in the housing by bearings provided on the housing and the end cap. A pair of the permanent magnets are formed in such a manner that the magnetic force of each magnet is made different from each other so that the rotor can be attracted to the permanent magnet having a larger magnetic force. One of the permanent magnets is made of a rare-earth plastic magnet containing a coloring material.

REFERENCES:
patent: 3787839 (1974-01-01), Fayling
patent: 3939371 (1976-02-01), Murakami
patent: 4112320 (1978-09-01), Mohr
patent: 4237397 (1980-12-01), Mohr et al.
patent: 4383193 (1983-05-01), Tomite et al.

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