无轴承异步电机转子不平衡振动仿真补偿  

Simulation of Rotor Unbalanced Vibration Simulation for Bearingless Induction Motor

作　　者：李彪 卜文绍 陈有鹏 LI Biao;BU Wen-shao;CHEN You-peng(Information Engineering College,Henan University of Sci&Tech,Luoyang Henan 471023,China;Electrical Engineering College,Henan University of Sci&Tech,Luoyang Henan 471023,China)

机构地区：[1]河南科技大学信息工程学院,河南洛阳471023 [2]河南科技大学电气学院,河南洛阳471023

出　　处：《计算机仿真》2020年第7期243-247,共5页Computer Simulation

基　　金：国家自然科学基金项目(51277053)。

摘　　要：针对无轴承异步电机转子质量不平衡振动问题,分析了无轴承异步电机不平衡振动产生原理,采用‘旋转坐标+低通滤波’的方法将产生的不平衡振动位移前馈补偿到转子系统中。即从位移传感器中提取转子径向振动位移,将转子径向振动位移旋转变换到与转子同步旋转的坐标系上,再使变换后的信号通过一个一阶低通butterworth滤波器,获得与转子同步旋转的不平衡振动位移信号,不平衡振动位移信号在经过旋转坐标变换到静止坐标上,将获得的静止坐标系下的不平衡振动信号前馈补偿到经过反馈补偿后的转子不平衡振动位移上。搭建仿真模型,仿真结果验证了转子振动位移峰-峰值显著减小,且转子振动位移远小于气隙间隙,无轴承异步电机运行性能得以改善。For the unbalanced vibration of rotor in bearingless induction motor,the principle of generating unbalanced vibration was analyzed.The forward compensation of unbalanced vibration displacement was changed into the rotor system by combing rotation coordinate with low-pass filter.In other words,the radial vibration displacement of rotor was extracted from the displacement sensor,and the radial vibration displacement of rotor was rotationally transformed into the coordinate system that rotated synchronously with the rotor.And then,the transformed signal was passed through a first-order low-pass Butterworth filter,so as to obtain the signal of unbalanced vibration displacement that rotated synchronously with the rotor.Moreover,the signal of unbalanced vibration displacement was transformed into the stationary coordinate by rotating coordinate.Finally,the unbalanced vibration signal in stationary coordinate system was compensated to the unbalanced vibration displacement of rotor after feedback compensation.The simulation model was built and the results prove that the peak-to-peak value of rotor vibration displacement is significantly reduced,and the displacement is much smaller than the air gap.The performance of bearingless asynchronous motor is improved.

关 键 词：无轴承异步电机 低通滤波器 不平衡振动位移 坐标变换 前馈补偿 

分 类 号：TM933[电气工程—电力电子与电力传动]