机械科学与技术2017，Vol.36Issue(9)：1367-1374,8.DOI:10.13433/j.cnki.1003-8728.2017.0910
时变性切削负载对异步型电主轴动态控制精度的影响
Influence of Time-varying Cutting Load on Dynamic Control Accuracy of Asynchronous Motorized Spindle
摘要
Abstract
To study the instability of dynamic accuracy control of motorized spindle in high-speed cutting process,a method to predict the output torque and speed of motorized spindle based on the voltage and current value of the input terminal of stator is put forward.The method is based on the principle of speed-sensorless vector control and combined with the electromagnetic parameters such as spindle resistance and inductance.And it takes the rotor flux linkage amplitude and phase angle as a bridge to establish mathematical model between the three-phase voltage and current of the stator input and the speed and torque of rotor output.A double closed-loop control system of speed outer loop and current inner loop on speed sensorless vector control is constructed.With the double closed-loop system,the three-phase voltage and current of the stator input during the cutting process are converted into the voltage and current in the two-phase rotating coordinate system.On this basis,the current loop is further decomposed into two independent control subsystems:flux linkage loop and torque loop to control the rotor flux linkage and the electromagnetic torque respectively.The output stability of torque and speed of the spindle can be determined by observing the current trends of flux linkage loop and torque loop.Finally,the method above is verified by cutting experiments.关键词
电主轴/矢量控制/切削负载/动态控制/精度Key words
motorized spindle/vector control/cutting load/dynamic control/accuracy分类
机械制造引用本文复制引用
康辉民,张朝星,刘艳余,许功元,胡斌梁,周知进..时变性切削负载对异步型电主轴动态控制精度的影响[J].机械科学与技术,2017,36(9):1367-1374,8.基金项目
湖南省教育厅基金项目(128042,15A063)、湖南省重点实验室开放基金项目(E21637)及湖南省自然科学基金项目(2017JJ2090)资助 （128042,15A063）
