RESEARCH OF A MICRO PERMANENT MAGNET SYNCHRONOUS MOTOR WITH DISTRIBUTED WINDINGS

Abstract

This research presents a micro permanent magnet synchronous motor using distributed windings to get higher output torque and smaller step angle. The distributed winding coil are made using flexible printed circuit broad. The stator is fabricated by electroforming shell on top of the circularly rolled printed circuit broad. The three-phase motor has fabricated with an outer diameter of 1,5mm, overall length of 5,6mm, shaft of 0,3mm-diameter, and step angle of 60⁰. The motor achieves a maximum speed of 11.000rpm and a maximum torque of 0,57μNm with input current of 0,7A. The motor performance could be further enhanced by improving assembly process and bearing friction.