Small motor having drive magnet with magnetization pattern for b

Details Small motor having drive magnet with magnetization pattern for b Small motor having drive magnet with magnetization pattern for b

1994-01-19

1997-10-14

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310269, 310254, 310258, 310259, 310261, H02K 2126, H02K 2138

Patent

active

056775873

ABSTRACT:
A small motor includes a rotor fastened to a rotor shaft; a drive magnet disposed facing to the rotor; and bearings for rotatably supporting the rotor shaft with the rotor fastened thereto, wherein a magnetization pattern of the magnet is shaped in such a manner that magnetic forces contributing to the rotation drive of the rotor are balanced, and magnetic forces contributing to the rotor core attraction are unbalanced, thereby biasing the rotor shaft in fixed directions within the bearings.

REFERENCES:
patent: 5083054 (1992-01-01), Tomite et al.
patent: 5089737 (1992-02-01), Abukawa et al.
patent: 5109172 (1992-04-01), Pace
patent: 5162684 (1992-11-01), Hayakawa
patent: 5206556 (1993-04-01), Hayakawa
patent: 5349258 (1994-09-01), Leupold et al.

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