摘要
提出一种五自由度稳定悬浮的电主轴，由二自由度磁悬浮异步电机与三自由度轴向混合磁轴承实现五个自由度的稳定悬浮。其中，三自由度混合磁轴承采用四个定子磁极来控制轴向悬浮力与径向扭转力，可有效减少轴向长度。文中介绍了五自由度磁悬浮电主轴工作原理，建立磁悬浮异步电机和混合磁轴承的数学模型，并用电磁场分析软件welll5．0分析其磁场和悬浮力，验证电主轴的可行性，最后运用biatlab软件建立基于转子磁场定向的无轴承异步电机控制系统，仿真结果表明该控制方法可有效稳定控制电机。
Based on two degrees of freedom magnetic bearings asynchronous motor and three degrees of freedom axial hybrid magnetic bearing, we proposed a novel structure of five degrees of freedom magnetic bearings electric spindle. The hybrid magnetic bearing with four segments of poles controls three degrees of freedom, this structure efficiently reduces the axial dimension of the magnetic bearing system. To start with,the working principle of five degrees of freedom magnetic bearings electric spindles was briefly introduced.Then the mechanical equations of two degrees of freedom magnetic bearings asynchronous motor and three degrees of freedom axial hybrid magnetic bearing were given. The magnetic field and the suspension force with Maxwelll 5.0 software were analyzed to prove the feasibility of electric spindle.Last,a control system based on rotor field oriented was established by using Matlab simulink tools.Simulation results proved the control system can control the motor effectively and steadily.
出处
《现代科学仪器》
2014年第1期51-56,共6页
Modern Scientific Instruments
关键词
电主轴
有限元分析
五自由度
SVPWM
Electric spindle
Finite element analysis
Five degrees of freedom
SVPWM
