圆筒型磁通切换永磁直线电机次级涡流损耗分析

his paper focused on the tubular flux-switching permanent magnet linear machines (TFSPMLM), in which the secondary is one whole tubby iron. This machine can endure high vibration and bad environment. However, the eddy current can be easily induced in the secondary, then temperature rises rapidly and efficiency drops. Hence, this paper deduced eddy current loss calculating model of tubular iron, and then established the calculating model of the secondary eddy current loss. According to the field component, the eddy current loss in the secondary was calculated. In order to reduce the secondary eddy current loss, the method of slitting along the circumferential direction was also discussed. Finally, the whole loss of a prototype was tested, and the experimental results and the calculated results were compared.