基于三维时步有限元的永磁体涡流损耗分析  

Analysis the Eddy Current Loss in Permanent Magnets Based on Three-dimensional Time-stepping Finite Element

作　　者：陈丽香[1] 李敏[1] 

机构地区：[1]沈阳工业大学国家稀土永磁电机工程技术研究中心,沈阳110870

出　　处：《微电机》2014年第3期16-19,共4页Micromotors

摘　　要：钕铁硼永磁材料具有较大的电导率,即使电机额定转速较低时,依然能在电机永磁体中产生较大的涡流损耗,影响电机性能,因此有必要对低速大转矩永磁同步电机永磁体涡流损耗进行研究。设计5台不同极槽配合的低速大转矩表贴式永磁同步电机,采用三维时步有限元法计算5台电机的永磁体涡流损耗。针对不同极槽配合电机气隙磁密分数次谐波含量对永磁体涡流损耗的影响进行分析。结果显示,分数次谐波含量越大永磁体涡流损耗越大。Because of the conductivity of NdFeB permanent magnet is very high, even at the low rate speed condition, the eddy current loss in permanent magnets will be very high, and it will degrade the performance of motor. So it is necessary to research the permanent magnet eddy current loss of PMSM with low speed and high torque. Design 5 low speed and high torque permanent magnet synchronous motors with different pole- slot matching. Utilize three-dimensional time-stepping finite element method to calculate permanent magnet eddy current losses of these 5 motors. In the 5 different pole-slot matching situation, the influence of air-gap flux density fractional harmonics to the permanent magnet eddy current loss was analyzed, and the result shows that the more the fractional harmonics, the more the eddy current loss.

关 键 词：极槽配合 永磁体涡流损耗 三维场 分数次谐波 永磁同步电机 

分 类 号：TM351[电气工程—电机] TM341