摘要
以永磁偏置径向磁轴承优化设计为目标,考察了三种性能较优且实现简单的永磁偏置径向磁轴承结构方案。通过等效磁路法和有限元计算,在充分研究多种结构方案的基础上优选出八磁极异极性PRMB、对称八磁极同极性PRMB以及偏置八磁极同极性PRMB三种拓扑结构。在相同设计约束条件下,对优化后的结构进行对比,并与电磁轴承方案比较。结果表明,永磁偏置磁轴承在相同体积限制下能提供更大承载力,其中八磁极异极性PRMB适用于轴向较短、功耗要求不严格的情况;对称八磁极同极性PRMB适用于轴向相对较长、对磁滞损耗和涡流损耗要求较严格的场景;偏置八磁极同极性PRMB适用于对偏心刚度要求低、对磁滞损耗和涡流损耗要求较严格的场景。
Aiming at the optimal design of permanent magnet biased radial magnetic bearing,this paper studies three structural schemes of permanent magnet biased radial magnetic bearing with better performance and simple implementation.Through the equivalent magnetic circuit method and finite element calculation,three topological structures,namely eightpole heteropolar PRMB,symmetrical eight-pole homopolar PRMB,and offset eight-pole homopolar PRMB,are optimized based on the full study of various structural schemes.Under the same design constraints,the optimized structures are compared,and a comparison is made with the electromagnetic bearing scheme.The results show that the permanent magnet biased magnetic bearing can provide greater bearing capacity under the same volume limitation.Among them,the eight-pole heteropolar PRMB is suitable for the situation with a shorter axial length and less strict power consumption requirements;the symmetrical eight-pole homopolar PRMB is suitable for the scene with a relatively longer axial length and more strict requirements for hysteresis loss and eddy current loss;the offset eight-pole homopolar PRMB is suitable for the situation with low requirements for eccentric stiffness and more strict requirements for hysteresis loss and eddy current loss.
作者
付辰丰
蔡华
FU Chen-feng;CAI Hua(Aerodynamic Technology Academy of CASIC,Beijing 100074,China)
出处
《磁性材料及器件》
2025年第3期62-70,共9页
Journal of Magnetic Materials and Devices
关键词
磁悬浮轴承
永磁偏置
结构设计
有限元分析
magnetic bearing
permanent magnetic bias
structural design
finite element analysis
