Low-profile stepping motor with two coils arranged flush...

Details Low-profile stepping motor with two coils arranged flush... Low-profile stepping motor with two coils arranged flush...

2005-01-04

2005-01-04

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S043000

Reexamination Certificate

active

06838792

ABSTRACT:
A low-profile stepping motor comprises: an upper twin-stator yoke plate composed of first and second upper stator yokes; a lower twin-stator yoke plate composed of first and second lower stator yokes; first and second coil units fixedly sandwiched between the upper and lower stator yoke plates so as to be arranged horizontally flush with each other; and a rotor assembly including a cylindrical magnet and disposed between the first and second coil units. In the stepping motor, one of the upper and lower twin-stator yoke plates is structured such that one half of its pole teeth partitioned in half by a predetermined datum line and open spaces each residing between two adjacent pole teeth of the other half are positioned symmetrically about the predetermined datum line, whereby the one twin-stator yoke plate can be used in common to the other twin-stator yoke plate.

REFERENCES:
patent: 5703419 (1997-12-01), Mizutani
patent: 6703728 (2004-03-01), Goubely et al.
patent: 2 793 966 (2000-11-01), None
patent: 10 094237 (1998-04-01), None

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