主动磁悬浮电主轴系统建模与控制参数分析  

Modeling and Control Parameters Analysis of Maglev Motorized Spindle System

作　　者：陈鹏 康辉民[1] 胡斌梁[1] 熊友平 CHEN Peng;KANG Huimin;HU Binliang;XIONG Youping(School of Mechanical and Electrical Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411110,China)

机构地区：[1]湖南科技大学机电工程学院,湖南湘潭411110

出　　处：《机床与液压》2020年第3期155-158,191,共5页Machine Tool & Hydraulics

基　　金：湖南省自然科学基金资助项目(2017JJ2090)。

摘　　要：为实现磁悬浮电主轴的稳定悬浮运行并满足加工精度要求,通过对某型号主动磁悬浮电主轴的结构和控制原理进行研究,在忽略主轴转子磁化和磁漏等非线性因素影响的前提条件下,通过对主轴转子在磁悬浮轴承中的受力分析,建立了磁悬浮轴承的电磁支承力与轴承气隙偏移量及控制电流的表达式,对基于不完全微分PID控制的磁悬浮电主轴系统的临界转速与磁悬浮轴承的电磁刚度进行了定量研究,得到不同PID控制参数下,磁悬浮轴承支承刚度随涡动频率的变化曲线及固有频率随PID控制参数的变化曲线图。研究结果为磁悬浮电主轴控制系统进一步设计使用和分析优化提供了依据。In order to realize the stable suspension operation of the magnetic levitation motorized spindle and to meet the requirement of machining precision,the structure and control principle of a certain type of active magnetic levitation motorized spindle are studied. Under the precondition of neglecting the influence of nonlinear factors such as magnetization and flux leakage on the spindle rotor,the stress of the spindle rotor in the magnetic suspension bearing was analyzed. The expressions of magnetic bearing force,bearing air gap offset and control current were established. The critical speed of magnetic suspension motorized spindle system based on incomplete differential Proportion Integration Differentiation( PID) control and the electromagnetic stiffness of magnetic suspension bearing were quantitatively studied. Under different PID control parameters,the bearing stiffness of maglev bearing was obtained,by the curve of degree with vortex frequency and the curve of natural frequency with PID control parameters. The results provide a basis for the further design,application and optimization of the magnetic levitation motorized spindle control system.

关 键 词：电主轴 PID控制 控制参数 支承特性 涡动频率 

分 类 号：TH16[机械工程—机械制造及自动化]