Miniaturization and Higher Output of Motor for Industrial Application using Magnetic-flux-concentrated Permanent Magnet Array

Abstract

　Output power of industrial servo motor is increased by intensifying magnetic flux density in the air gap. The magnetic-material-attached magnetic-flux-concentrated permanent magnet (MFCPM) array is a magnet array which can easily generate much larger magnetic flux density than the conventional magnet arrays, such as, ring-shaped SPM array, and Halbach array. This paper reports on prototype motor evaluation results when applying the MFCPM array. After three prototype design-and-evaluation steps, it is confirmed that, in comparison to the standard motor, the final prototype motor will perform more than 140% torque-mass density and over 600% power rate density with 62% motor mass.