Numerical Analysis of Multi-scale Strength of Composite Rotor for High-speed Permanent Magnet Motor
Conventional high-speed permanent magnet motors mostly use block permanent magnet structure,which is very easy to lead to the destruction of sintered permanent magnets under high-speed rotation.In order to improve the mechanical strength of the rotor,a new composite rotor structure is proposed in the paper,which uses magnetic powder film/carbon fiber composite magnetic material instead of a sintered permanent magnet and adopts a multi-scale analysis method to study its performance.At the fine scale,the mechanical properties of the carbon fiber unit are analyzed using the homogenization theory,and then the mechanical properties of the magnetic powder film unit are analyzed according to the single-cell structure theory.On the macroscopic scale,the performance of each unit is taken as the effective performance of each monolayer in the multilayer composite magnetic material,and the classical plywood theory is used to calculate the overall mechanical properties of the composite magnetic material and to verify the correctness of the multiscale analysis method by comparing it with the tensile test.Finally,the strength numerical simulation of the rotor model at different scales is carried out by using finite element software,and the stress distribution of the model at different scales is studied.The results show that the rotor stress analysis at the fine scale is more accurate.
high-speed motorflywheel energy storagemulti-scalerotor strengthnumerical analysis
万方数据
维普
