Stepping motor with protruding pole teeth to increase detent tor

Details Stepping motor with protruding pole teeth to increase detent tor Stepping motor with protruding pole teeth to increase detent tor

1995-06-15

1997-10-14

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310254, H02K 3712, H02K 2112, H02K 114

Patent

active

056775814

ABSTRACT:
A stepping motor according to the present invention comprises a cylindrical permanent magnet on whose outer periphery N and S poles are alternately polarized, a rotatably-supported rotor, a plurality of stator cores having pole teeth arranged so as to face the permanent magnet, an exciting coil for rotating the rotor when the coil is turned on, and at least two protruded teeth serving as auxiliary poles which face the cylindrical surface of the permanent magnet so as to generate a detent torque when it is magnetized by the permanent magnet. And each of the protruded teeth faces the consecutive N an S poles of the permanent magnet.

REFERENCES:
patent: 3800175 (1974-03-01), Plotscher et al.
patent: 4794292 (1988-12-01), Torisawa

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