Abstract
Taken permanent magnet synchronous motor with similar number of slots and poles as an object, in order to solve electromagnetic vibration problem, the restrain effect on electromagnetic vibration and its harmonies by auxiliary slot is researched in this paper. This paper analyzes the reasons of radial electromagnetic force wave by the analytical method. The influence of different numbers of auxiliary slots in a single stator tooth on the radial electromagnetic force wave and harmonic content is calculated and analyzed by the finite element software. The result shows increasing auxiliary slots can reduce radial electromagnetic force wave and its harmonic content amplitude. But also need to take into account the cogging torque performance and choose the appropriate auxiliary slot.
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