高速电主轴非接触加载动态电磁力分析与计算  

Analysis and calculation of Dynamic Electromagnetic Force on High Speed Motorized Spindle's Non-contact Loading

作　　者：邱荣华[1,2] 刘宏昭[1] 周训通[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048 [2]西安工程大学机电工程学院,西安710048

出　　处：《机械科学与技术》2013年第12期1762-1766,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家科技重大专项资助项目(2010ZX04014-012)

摘　　要：高速电主轴可靠性实验中非接触电磁加载装置需按实际载荷控制径向电磁力。为实现径向加载的闭环控制,建立了高转速加载时的动态电磁场解析模型,该模型综合考虑了实心加载盘高速旋转时产生的涡流磁场及对磁极原磁场的影响。对磁场解析模型的分析、求解得到了径向加载电磁力的解析表达式。解析计算结果表明磁极原磁场及加载盘转速是影响径向加载电磁力的主要因素。为验证解析计算的有效性,采用有限元法(FEM)建立了动态电磁场的三维仿真模型,得到了较为精确的仿真计算结果。为进一步验证径向电磁力分析的准确性,实测了加载盘在不同转速下的径向电磁力,结果表明计算值与实测值较吻合,证明动态电磁力分析与计算方法正确,研究结果可建立径向加载的控制模型。It is necessary to control radial force of non-contact electromagnetic loading device according to actual load in reliability experiments of high speed motorized spindle. To realize closed loop control of radial force, analytical model of dynamic electromagnetic field is built under high speed loading. In this model, the production of eddy currents magnetic field and its effects on original magnetic field are considered, and the analytical formula of radial electromagnetic force is acquired. The analytical calculation results show that the main influence factors are original magnetic field and the loading disc speed. To verify the effectiveness of the analytical calculation, the finite element method （FEM） is adopted to build three-dimensional simulation model of dynamic electromagnetic field. And the accurate calculation results are acquired. To further validate the accuracy of analysis of radial electromagnetic force, radial electromagnetic force measuring tests are conducted with different disc speeds. It is shown that the cal- culation results are in good agreement with those of measurement.

关 键 词：高速电主轴 非接触加载 径向电磁力 动态电磁场 解析模型 有限元 

分 类 号：TM355[电气工程—电机]