Suppression of Magnet Temperature Rise in a Surface Permanent Magnet Synchronous Motor with a Magnetic Composite Ring Installed on the Stator

The magnetic composite ring motor aims to reduce the eddy current loss in permanent magnets during high-speed rotation by installing magnetic material on the stator, thereby suppressing temperature rise. The results showcased the influence of the composite ring material on temperature rise suppression was investigated. As a result, under conditions of 30,000r/min and 500W, a temperature rise reduction of more than 10°C was confirmed compared to a conventional open-slot motor.