Magnetically enhanced stepping motor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4763034
SERIAL NO

07072213

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The electric motor includes a mover, which may be a rotor or actuator, and a stator having a number of poles projecting toward the mover. The poles have soft-magnetic teeth projecting toward the mover and extending transverse to the direction of mover movement, and the mover has soft-magnetic teeth projecting toward the stator teeth and extending transverse to the direction of mover movement. Windings energize the stator to move the mover. Dividing each pole transverse to the direction of mover movement to define two pole portions per pole, and locating permanent magnetic material between stator teeth in only one portion of each of the poles, enhances the motor torque while achieving a saving of permanent magnetic material. Preferably the magnetic material exists on alternate pole portions in successive poles.

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Patent Owner(s)

Patent OwnerAddress
SIGMA INSTRUMENTS INC90 LIBBEY PARKWAY A CORP OF MA WEYMOUTH MA 02189

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gamble, John G Hull, MA 9 89

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