高速异步电主轴电机的电磁噪声分析

摘要

采用有限元法分析了高速异步电主轴电机定子结构的动力学特性(振型、固有频率),分别采用解析法和有限元法分析了电机在额定转速60 000 r/min下空载和负载的电磁力波,利用傅里叶变换对径向气隙磁密和径向电磁力波进行了谐波分析,得到了不同阶次不同频率下的谐波幅值.还将得到的电磁力波加载到电机定子相应节点处,对高速异步电主轴电机进行了电磁振动和声场分析,并计算出电机在空载和负载情况下产生的电磁噪声.%The finite element method was used to analyze the dynamic characteristics (such as shapes,natural frequencies) of the stator structure of high speed induction motor.The analytical method and the finite element method were used to analyze the electromagnetic force wave of the motor under the rated speed 60 000 r/min.Harmonics of radial air gap flux density and radial electromagnetic force wave were analyzed by Fourier transform.And the harmonic amplitudes at different frequencies were obtained.The electromagnetic force wave were added to the corresponding node of the motor stator.Electromagnetic vibration and sound field of high speed induction spindle motor were analyzed.The electromagnetic noise of the motor under no-load and load conditions was calculated.