摘要
齿槽转矩是由于谐波磁势与气隙磁导的相互作用产生,齿槽转矩的变化引起电机振动与噪声,影响永磁同步电主轴的稳定性。提出了一种削弱永磁同步电主轴齿槽转矩的方法,可以提高高档数控机床的工作精度。借助ANSYS有限元分析软件,建立了永磁体同步电主轴有限元模型,分析其电磁特性。通过改变非均匀气隙中不同的最长气隙长度与其偏移位置角度气隙形状参数,总结出齿槽转矩和额定转矩的变化规律。依据最佳参数设计永磁同步电主轴,可有效地降低齿槽转矩。研究表明:同一最长气隙长度下,随着偏移位置角度的增加,齿槽转矩先下降,然后开始增加;而额定转矩是先呈现上升趋势,后逐渐开始下降。合理设计永磁同步电主轴气隙形状可以有效地削弱齿槽转矩,且不会减小额定转矩值。
Cogging torque results from the interaction of the magnetmotive force （ MMF） and the airgap permeance.The change of the cogging torque generates the vibration and noise and affects the stability of permanent magnet synchronous electrical spindle （ PMSES） .A method that weakens the cogging torque of PMSES was presented, and it can improve the precision of NC machine tool. The finite element model of PMSES was established and the electromagnetic characteristics of the PMSES was analyzed by ANSYS finite element analysis software.By changing different the longest length of airgap and offset angle of airgap profile parameters in the non-uni-form airgap, the changer egular of cogging torque and rated torqueare were summarized.The cogging torque of the PMSES could be ef-fectively reduced according to the optimal design parameter.The simulating results show that cogging torque firstly decrease and then began to increase with increase of the offset angle in the longest length of air gap.However, the rated torque firstly rises, then, gradu-ally began to decline.The cogging torque can be effectively reduced and rated torque is not affected by reasonable design of airgap pro-file in the PMSES.
出处
《机床与液压》
北大核心
2016年第13期10-13,22,共5页
Machine Tool & Hydraulics
基金
国家自然科学基金资助项目(51175350)
沈阳市科技计划项目(F15-199-1-13)
关键词
齿槽转矩
永磁同步电主轴
气隙形状
Cogging torque
Permanent magnet synchronous electric spindle
Airgap profile
