Analysis of Rotor Permanent Magnet Shape and Rotor Material Influence of High-speed Motor Rotor Stresses
Permanent magnet cracking is a common failure of external rotor permanent magnet synchronous motors.In order to study the causes of permanent magnet cracking and propose solutions,the influence of permanent magnet shape,permanent magnet and yoke material fit on the stresses on each part of the motor rotor was considered in this paper,and the motor rotor was mechanically analyzed.The results show that the stress distribution of tile-shaped magnets is better than that of rectangular magnets.The highest safety margin of 56.41％is achieved when the magnet and yoke material fit is DT4/N35(EH).When the material fit is DT4/SmCo28,the maximum stress in the permanent magnet exceeds the yield strength by 22.38％,resul-ting in permanent magnet cracking.The results of this paper are of great reference significance for the exter-nal rotor motor structural design and motor safe and reliable operation.
万方数据
维普
