异极性永磁偏置径向磁轴承的参数设计与实现

为了克服现有异极性永磁偏置径向磁轴承参数设计的不足,对一种异极性永磁偏置径向磁轴承进行了研究,分析其结构和工作原理。以其为对象提出了一种根据二维有限元仿真结果构建等效磁路,以满足承载力所需的偏置磁场与控制磁场的磁通量为基本目标;并以软磁材料不饱和为约束条件,结合等效磁路,推导出永磁材料和定转子结构的参数设计方法;设计了径向悬浮力400N的原理样机,进行了三维仿真分析和实验验证。结果表明:提出的参数设计方法合理,利用该方法设计的异极性永磁偏置径向磁轴承悬浮性能优良,为其他型永磁偏置磁轴承的研究奠定了基础。

Parameter Design and Realization of Permanent Magnet Biased Heterploar Radial Magnetic Bearing

To overcome the defects of the present parameter design of the permanent magnet biased heterpolar radial magnetic bearing(PRMB),its precise equivalent magnetic circuit is established based on 2-D finite element simulation.A parameter design method is deduced based on the equivalent magnetic circuit aiming at bias magnetic field and control magnetic field needed by the magnetic force,under the condition of no saturation in the soft magnetic material.The experimental prototype of 400N is designed.The 3-D magnetic field simulation and experiments are carried out.The simulation and the experiment results show that the parameter design method is rational,the levitation performance of PRMB is good and this method established a basic foundation for the research of other magnetic bearings.