Development of a high-speed permanent magnet machine

Abstract

With the development of new energy, aerospace and high-end manufacturing fields, high-speed permanent magnet synchronous motors (HSPMSM) are widely used due to their advantages of high efficiency, high power density and compact structure. This thesis designs a 24kW-rated, 20,000rpm surface-mounted HSPMSM, with systematic investigations conducted on its electromagnetic design and rotor structural strength. Firstly, based on the main parameters of the motor, the stator-rotor structural design is completed, and 2D electromagnetic simulation is carried out using Ansys Maxwell software to verify that its performance meets the design requirements. Secondly, a finite element model was established using ANSYS Workbench to solve the mechanical stress problem of the rotor under high-speed operation, and the stresses of the permanent magnet and sleeve were simulated and analyzed. The results demonstrate that the stresses and strains of the rotor at the highest speed are within the material safety range and have good structural reliability. This study provides theoretical basis and methodological support for the optimized design and engineering application of HSPMSM.