关键词: 高速永磁电机, 三段式转子, 模态分析, 固有频率, 模态实验

Abstract: Based on the modal analysis theory, a three-stage rotor of a magnetic bearing high-speed permanent magnet motor was taken as the research object. And the rotor model was established by modifying the elastic modulus parameters of the component material. The mode analysis of the rotor model was carried out by using the finite element analysis software, and the simulation results were verified by modal experiments. The results show that the error between the first two-order natural frequencies obtained by this modified model and the experimental results is less than 5%, which verifies the reliability of this method . And the research results provide a reference for the rotor dynamics analysis of high-speed
permanent magnet motors with the same type of rotor.

Key words: high-speed permanent magnet motor, three-stage rotor, modal analysis, natural frequency, modal experiment