Permanent Magnet Eddy Current Loss Analysis of the.pdf

Proceedings of 2014 IEEE International Conference on Mechatronics and Automation August 3 - 6, Tianjin, China Permanent Magnet Eddy Current Loss Analysis of the Permanent Magnet Spherical Motor Li Hongfeng, Shen Yanbo and Zhu Shengtao air gap closer to sinusoidal waveform and also improves the School of Electrical Engineering and Automation, operating performance of the motor [3]. At present, the research on the PM spherical motor is still Tianjin University, Tianjin 300072, China on the theory exploration stage and confined to the fields of {lihongfeng, shenyanbo zhushengtao}@tju.edu.cn electromagnetic, mechanics decoupling control, trajectory tracking and so on. However, the eddy current loss in magnets Abstract - The analysis of the eddy current loss in is a critical issue for the motor design. The PM eddy current the permanent magnet (PM) is an important research topic of the loss will result in the temperature rise of the magnets and the PM spherical motor. The PM eddy current loss can lead to the magnetic properties change, which leads to the motor increase of PM temperature and the change of magnetism, and efficiency decreasing and performance deterioration. In many these will decrease the efficiency of the moto