论文部分内容阅读
提出一种新型的五自由度混合磁轴承支承高速电机系统,由径向二自由度混合磁轴承、径向—轴向三自由度混合磁轴承和高速电机构成。文中介绍混合磁轴承的结构和工作原理,二自由度混合磁轴承采用轴向充磁的环形永磁体提供偏置磁场,定子采用双片式八极结构,每片定子有四个凸极。三自由混合磁轴承集成径向和轴向磁轴承功能,采用径向充磁的环形永磁体提供径向和轴向偏置磁场。导出磁轴承的数学模型,给出详细的参数设计方法,最后采用Maxwell电磁场有限元分析软件对磁轴承的磁路和主轴受力情况进行分析。理论研究和有限元分析表明,这种五自由度混合磁轴承系统结构参数设计合理。
A novel 5-DOF high-speed hybrid magnetic bearing system is proposed. It consists of a radial two-degree-of-freedom hybrid magnetic bearing, a radial-axial three-degree-of-freedom hybrid magnetic bearing and a high speed motor. The paper introduces the structure and working principle of hybrid magnetic bearing. The two-degree-of-freedom hybrid magnetic bearing adopts a circumferentially magnetized annular permanent magnet to provide a bias magnetic field. The stator adopts a double-plate octupole structure with four salient poles per stator. The three free-mixed magnetic bearings incorporate radial and axial magnetic bearing functions, using radially magnetized ring-shaped permanent magnets to provide both radial and axial bias magnetic fields. The mathematical model of the magnetic bearing is deduced, and the detailed parameter design method is given. Finally, the magnetic circuit and spindle stress of the magnetic bearing are analyzed by Maxwell electromagnetic field finite element analysis software. Theoretical research and finite element analysis show that the structural parameters of this five degrees of freedom hybrid magnetic bearing system are well designed.