Accession Number : ADD014858

Title :   Magnetostrictive Angular Positioning Motor.

Descriptive Note : Patent Application, Filed 11 Oct 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Clark, Arthur E ; Teter, Joseph P

Report Date : 11 Oct 1990

Pagination or Media Count : 14

Abstract : This patent application discloses a device in which a plurality of axially elongated drive modules are interconnected at their opposite ends in a polygonal arrangement to angularly spaced locations on an outer annular ring to establish compressive stress therein, while intermediate portions of the modules are radially spaced form an inner shaft through which a common rotational axis extends. Each module includes at least two magnetostrictive rod elements held in axial alignment at their adjacent ends by a coupling through which the module is radially spaced from the common axis and drive coils electrically energized to generate magnetic fields of opposite polarity causing simultaneous elongation and contraction of the rod elements to apply unidirectional torque to a rotor formed by either the outer ring or the inner shaft.

Descriptors :   ALIGNMENT, ANGLES, COILS, COMPRESSIVE PROPERTIES, DRIVES, ELONGATION, EXTERNAL, INTERNAL, MAGNETIC FIELDS, MAGNETOSTRICTION, MOTORS, PATENT APPLICATIONS, POSITION FINDING, POSITION(LOCATION), RINGS, RODS, ROTATION, SHAFTS(MACHINE ELEMENTS), STRESSES, SYNCHRONISM, TORQUE, UNIDIRECTIONAL

Subject Categories : Electricity and Magnetism
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE