Brushless linear servomotor

摘要

A brushless linear servomotor utilizes a first member provided with magnetic teeth having a large number of teeth-salients and slots arranged lengthwise of the first member at regular pitches and a second member which is moveable along the first member and has at least one magnetic core with magnetic teeth groups engraved thereon at surfaces opposite to the first member, and having a coil wound around each of the magnetic cores and further having a guide arranged to keep a constant gap between the first and second members. A number of non-contact detectors are connected to the second member so as to detect the salients and slots of the magnetic teeth of the first member. An electronic commutator and an electronic scale circuit are both connected to the non-contact detectors. The electronic scale means generates signals indicative of the relative position of the two members and a motor driving circuit is connected to each of the coils and the electronic commutator so as to operate the motor in response to the electronic commutator.