Limited angle torque motor with magnetic centering and stops

Electrical generator or motor structure – Dynamoelectric – Oscillating

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H02K 3300

Patent

active

045104034

ABSTRACT:
A 2-pole limited angle torque motor including a rotor assembly having one or more permanent magnets which are magnetized in the diametrical direction and a stator assembly having a pair of stator magnetic pole blades surrounded by a high density layer wound stator coil, with stator pole flanges at opposite ends of the stator magnetic pole blades which create a cross flux through the stator and rotor assemblies that produces a limited angle turning torque in the motor. The permanent rotor magnets along with stator magnetic poles and magnetic housing produce a magnetic reluctance torque that can be controlled to obtain a desired magnetic centering or de-centering spring rate for the rotor at a particular torque or power level. A magnetically saturating flux path may also be made to occur in the motor at the end of the rotational design stroke of the motor to provide a magnetic stop for the rotor shaft.

REFERENCES:
patent: 3234436 (1966-02-01), Bieger
patent: 3483410 (1969-12-01), Siegelman et al.
patent: 4090112 (1978-05-01), Selverstone
patent: 4227164 (1980-10-01), Kitahara
patent: 4287457 (1981-09-01), Takemura

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