Stepping motor actuator with two interposed pole tooth pairs

Details Stepping motor actuator with two interposed pole tooth pairs Stepping motor actuator with two interposed pole tooth pairs

1987-06-19

1988-08-30

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

192143, 310 49R, 310 80, H02K 710

Patent

active

047679581

ABSTRACT:
A stepping motor suitable as a drive source for driving a head carriage in a magnetic recording/reproducing apparatus for use in an electronic still camera or the like. In the stepping motor, a magnet rotor is formed in the outer circumferential surface with alternately arranged north and south poles, while two excitation coils, which serve as the stator part of the stepping motor, are located such that they embrace the magnet rotor from both axial ends thereof. The two excitation coils are embraced by two yokes, respectively. Each of the yokes is provided with pole teeth, formed so as to cover the circumference of the magnet rotor. A slidable screw parallel to the shaft serves as a linear actuator.

REFERENCES:
patent: 1577206 (1926-03-01), Dempster
patent: 3234418 (1966-02-01), Tomaro, Jr.
patent: 3249191 (1966-05-01), Helms
patent: 4009406 (1977-02-01), Inariba
patent: 4318018 (1982-03-01), Kennedy
patent: 4535263 (1985-08-01), Avery
patent: 4588913 (1986-05-01), Adami

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