Stepper motor device

Details Stepper motor device Stepper motor device

2011-07-12

2011-07-12

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S049070

Reexamination Certificate

active

07977827

ABSTRACT:
A stepper motor device has a stator and a rotor. The rotor comprises: a shaft; a rotor core associated with the shaft; and a magnet fixed to the rotor core. The stator comprises: a stator shell; a yoke disposed within the shell; a coil wound about the yoke and an end plate magnetically connecting the yoke to the stator shell. The coil is located beside the magnet in the axial direction of the motor. The stator has a number of salient poles, and the salient poles are arranged to face the magnet across a small air gap. The coil creates magnetic poles in the salient poles with a common polarity.

REFERENCES:
patent: 3304451 (1967-02-01), Scholten
patent: 3330975 (1967-07-01), Osterwalder
patent: 3356876 (1967-12-01), Scholten
patent: 4920292 (1990-04-01), Albrecht et al.
patent: 4973866 (1990-11-01), Wang
patent: 5097162 (1992-03-01), Wang
patent: 5973425 (1999-10-01), Aoshima
patent: 6465916 (2002-10-01), Aoshima
patent: 2002/0047334 (2002-04-01), Aoshima

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