Stepping motor

Details Stepping motor Stepping motor

2005-03-29

2005-03-29

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156450, C310S257000, C310S254100

Reexamination Certificate

active

06873068

ABSTRACT:
A stepping motor includes a stator whose outer diameter is 8 mm or less and a rotor having a magnet disposed opposing to the stator. The stator has a core with pole teeth formed therein. The ratio between the thickness of the pole teeth formed in the core in the radial direction on the stator side and an outer diameter of the magnet on the rotor side, in other words, the quotient derived by dividing the thickness of the pole teeth by the outer diameter of the magnet, is set in a range between 0.121 and 0.148 to achieve good torque characteristic and linearity.

REFERENCES:
patent: 3777196 (1973-12-01), Field, II
patent: 4347457 (1982-08-01), Sakamoto
patent: 4406958 (1983-09-01), Palmero et al.
patent: 4739201 (1988-04-01), Brigham et al.
patent: 4831301 (1989-05-01), Neumann
patent: 4933585 (1990-06-01), Rossi
patent: 4983867 (1991-01-01), Sakamoto
patent: 6057613 (2000-05-01), Trago

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