磁悬浮电动机径向永磁轴承的建模和悬浮性能研究  

Modeling and Levitation Performance of Radial Permanent Magnetic Bearings of Magnetic Levitation Motor

作　　者：朱军 曾励[1] 竺志大[1] 

机构地区：[1]扬州大学机械工程学院,江苏扬州225127

出　　处：《科技创新与应用》2018年第2期1-4,6,共5页Technology Innovation and Application

摘　　要：传统电动机由机械轴承支承转子旋转,存在摩擦面磨损严重、效率低,精度不够、响应缓慢、动态性能较差等一系列问题,为此提出基于永磁径向支承转子的磁悬浮电动机技术;根据永磁磁场的等效磁荷理论建立了永磁磁悬浮轴承径向悬浮磁力和轴向磁悬浮磁力以及磁转子模型;通过磁悬浮刚度分析,判断永磁轴承轴向磁悬浮及径向磁悬浮以及转动悬浮的稳定性;通过有限元分析了永磁轴承的径向磁力随着永磁磁环轴向厚度d和径向宽度dm的变化规律;研究了永磁轴承轴向转子产生轴向位移及径向位移,对磁轴承轴向磁力和径向磁力的影响。A series of problems such as serious wear of friction surface, low efficiency, low precision, slow response, poor dy- namic performance, and so on, exist in traditional motor rotor rotation supported by mechanical bearings. For this reason, the technol-ogy of magnetic levitation motor based on permanent magnetic radial support rotor is proposed. According to the equivalent magnetic charge theory of permanent magnetic field, the models of radial and axial magnetic levitation magnetic force and magnetic rotor of permanent magnetic suspension bearing are established. The stability of axial and radial magnetic levitation and rotational suspension of permanent magnetic bearings is determined by the analysis of magnetic suspension stiffness. The variation of radial magnetic force with axial thickness d and radial width dm of permanent magnetic bearing is analyzed by finite element method. The effects of axial and radial displacements on axial and radial magnetic forces of permanent magnetic bearings are studied.

关 键 词：磁悬浮电动机 永磁轴承 径向磁力 轴向磁力 稳定性 

分 类 号：TM351[电气工程—电机]