Hybrid Permanent-Magnet Synchronous Motor

Abstract

A number of configurations for interior permanent-magnet type synchronous motors have been developed in recent years. This paper describes a form of motor having large output and high efficiency. Use can be made of samarium cobalt magnets, and the volume of the magnets used in the rotor is small compared with that of the conventional permanent-magnet synchronous motors. The characteristics of the motor are predicted by using the finite-element method. The agreement between predicted and measured results is good. Lastly, the characteristics of the motor using Neodymium-iron-boron magnets instead of samarium cobalt magnets are predicted.