Closed-loop linear position servomotor

Claim 1

A closed-loop linear position servomotor including a servo-amplifier, comprising: (a) a hollow, tubular stator having radially disposed throughout the shell thereof a plurality of magnetically symmetric field magnets, each having its magnetic axis directed to the radial center of said stator, said stator further comprising a plurality of symmetric, longitudinally disposed feedback windings, the longitudinal extent thereof corresponding to the extent of change of linear position of the servomotor, said feedback windings comprising the secondary windings of the servomotor; and (b) radially within said stator, an elongate armature having a radius smaller than the radius of said stator, said armature longitudinally wound with high current excitation windings, said excitation windings comprising the primary windings of the servomotor, the longitudinal length of said windings corresponding in length to at least the longitudinal length of said feedback windings of said stator, wherein the difference in radii between said armature and said stator define an air gap and, further wherein, current flowing through said excitation windings will magnetically interact with said secondary windings of the stator responsive to the character of the electrical input to said excitation windings, whereby said feedback windings will magnetically monitor motion and force of said armature relative to said stator to thereby generate a corresponding motion and force feedback to said servo-amplifier to thusly produce a corrected excitation signal to said excitation winding to provide continuously corrected linear motion and force to said armature.