【摘要】 为降低三极混合磁轴承径向悬浮力的非线性并进一步降低磁轴承的功耗和成本,提出一种交流径向–轴向六极混合磁轴承。首先介绍交流径向?轴向六极混合磁轴承的结构和工作原理,推导其径向、轴向悬浮力的数学模型;其次,根据数学模型重点分析径向悬浮力线性度及耦合特性,利用有限元分析软件分别对其径向、轴向悬浮力进行仿真分析验证,并与三极混合磁轴承作相关参数对比。最后构建实验平台进行悬浮和扰动测试。研究结果表明:交流径向?轴向六极混合磁轴承径向悬浮力模型可等效为线性模型;轴向位移产生的磁阻力能将转子稳定悬浮于轴向平衡位置。更多还原

【Abstract】 In order to reduce the nonlinearity of radial suspension forces of the three-pole hybrid magnetic bearing and further reduce the cost and power consumption, an AC radial-axial six-pole hybrid magnetic bearing was proposed.Firstly, the structure and working principle of the AC radial-axial six-pole hybrid magnetic bearing were introduced,and the mathematical models of radial and axial suspension forces were derived. Secondly, on the basis of the mathematical model, the linearity and coupling characteristics of the radial suspension forces were analyzed, and then the radial and axial suspension forces were simulated and verified by the finite element method(FEM). Next, the correlation performance indexes were compared with the three-pole hybrid magnetic bearing. Finally, an experimental platform was built, and suspension and disturbance tests were carried out. The research results show that the radial suspension force model of the AC radial-axial six-pole hybrid magnetic bearing can be regarded as a linear system, and the magnetic resistance force produced by axial displacement is enough to stabilize the rotor in the axial equilibrium position.更多还原