插入式永磁同步电主轴弱磁控制策略  

Magnetic Field Weakening Control Strategy of Plug-in Permanent Magnet Synchronous Motorized Spindle

作　　者：曹伟长 单文桃 吕冬喜 林奇 池云飞 CAO Wei-chang;SHAN Wen-tao;LV Dong-xi;LIN Qi;CHI Yun-fei(Institute of Mechanical Engineering,Jiangsu University of Technology,Changzhou 213001,China)

机构地区：[1]江苏理工学院机械工程学院,常州213001

出　　处：《组合机床与自动化加工技术》2023年第1期71-74,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：江苏省高校自科重大项目(19KJA510001)。

摘　　要：为提高永磁同步电主轴的性能,在矢量控制坐标变换的基础上,对插入式永磁同步电主轴进行研究。首先,根据拉格朗日定理构造函数得到关于i_(d)、i_(q)与T_(e)关系的四阶方程,采用拟合曲线的方式对其进行近似求解,实现最大转矩电流比控制,提高了主轴电流利用率;然后利用电压极限椭圆的梯度下降法对最大转矩电流比控制产生的分配电流i_(d)、i_(q)进行修正,从而实现弱磁控制,扩展了主轴的调速范围;最后以实验室中高速磨削电主轴FL170-20-15为例,通过以上算法搭建基于MATLAB的仿真实验平台进行实验验证,并分析该控制策略的效果。实验结果显示,仿真结果和试验结果吻合较好,该控制策略下主轴系统上升时间为3.4 s,超调量仅为0.25%,由此表明:采用拟合曲线法最大转矩电流比控制和梯度下降法弱磁控制策略在理论和工程应用上均具有重要意义。In order to improve the performance of permanent magnet synchronous motorized spindle,the plug-in permanent magnet synchronous motorized spindle is researched on the basis of vector control coordinate transformation.Firstly,the fourth-order equation about the relationship between i_(d)、i_(q)and T_(e)is obtained according to the construction function of Lagrange′s theorem,and it is approximately solved by fitting the curve to realize the control of the maximum torque current ratio and improve the utilization rate of the spindle current;Then,the gradient descent method of the voltage limit ellipse is used to correct the distribution current i_(d)and i_(q)generated by the maximum torque-current ratio control,so as to realize the field weakening control and expand the speed regulation range of the spindle.Taking FL170-20-15 as an example,a simulation experiment platform based on MATLAB is built through the above algorithm for experimental verification,and the effect of the control strategy is analyzed.The experimental results show that the simulation results are in good agreement with the experimental results.Under this control strategy,the rise time of the spindle system is 3.4 s,and the overshoot is only 0.25%.The field weakening control strategy of the descent method is of great significance in both theoretical and engineering applications.

关 键 词：高速电主轴 最大转矩电流比 弱磁控制 矢量控制 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]