Claw-pole permanent magnet stepping motor

Details Claw-pole permanent magnet stepping motor Claw-pole permanent magnet stepping motor

2007-04-17

2007-04-17

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S049030

Reexamination Certificate

active

11337482

ABSTRACT:
A claw-pole PM stepping motor includes a module that is formed in such a manner that a first driving unit and a second driving unit are symmetrically arranged with respect to a first claw-pole and a second claw-pole each oppositely disposed at a main yoke member internally disposed to substantially divide an inside of a housing, an inner portion of which is rotatably inserted and supported by a rotary shaft, and the first driving unit and the second driving unit have magnet rotors coaxially arranged to generate electromagnetic force; sub-yoke members; and coil bobbins. The claw-pole PM stepping motor is exempted from a structure where coil bobbins are concentrically arranged at a periphery of magnet rotors, and instead the coil bobbins are coaxially arranged and shifted from each other from the corresponding magnet rotors, such that a miniaturized motor with a reduced outer diameter can be embodied.

REFERENCES:
patent: 2122307 (1938-06-01), Welch
patent: RE28075 (1974-07-01), Kavanaugh
patent: 4823038 (1989-04-01), Mizutani et al.
patent: 5283487 (1994-02-01), Oki et al.

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