Research on Rotor Air Friction Loss of High-speed Permanent Magnet Machines
Research on Rotor Air Friction Loss of High-speed Permanent Magnet Machines
复制标题
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Kong Xiaoguang
中科院分区：
文献类型：
--
作者：
Kong Xiaoguang
高速电机转子转速可达10 000 r/min以上，其转子表面的空气摩擦损失比传统电机大得多，在总损失中所占比例很大，由于空气摩擦损失受转子转速、气隙结构、转子表面粗糙度等多种因素的影响，通过理论分析很难准确计算空气摩擦损失，本文研究了转子摩擦损失与转子转速、转子表面粗糙度在三维流场分析的基础上，研究了气流的轴向速度，并以高速永磁体为例，针对额定转速为60 000 r/min的磁悬浮电机，研究了空气摩擦损失的计算和实验测定方法，通过不同转速下的空载实验，通过三维有限元分析确定空气摩擦损失与转子转速的关系，将摩擦损失从电机总损失中分离出来计算结果与试验结果吻合较好，证明了本文提出的摩擦损失计算方法的有效性。
For a high-speed machine,the rotor speed can reach up to or even above 10 000 r/min,and the air friction loss of its rotor surface is much greater than that of a traditional one,which accounts for a large proportion in the total losses.Since the air friction loss is affected by many factors,such as rotor speed,structure of air-gap,roughness of rotor surface,etc,it is difficult to accurately calculate the air friction loss by theoretical analysis.In this paper,the relationship between rotor friction loss and rotor speed,the roughness of rotor surface,and the axial velocity of airflow were investigated based on 3D fluid field analysis.Taking an example of a high-speed permanent magnet(PM) machine whose rotor is magnetically suspended with rated speed of 60 000 r/min,the calculation and experimental determination methods for air friction loss were studied.Through the no load experiments for different speeds,the friction loss can be separated from the total losses of the machine based on the relationship between the air friction loss and rotor speed determined by the 3D finite element analysis of fluid field.The calculated friction losses accorded with the tested results,which proved the validity of the proposed calculation method for friction loss.