LIMITED ANGLE TORQUE MOTOR WITH MAGNETIC CENTERING AND STOPS

摘要

Title: "Limited Angle Torque Motor With Magnetic Centering and Stops" 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.