关键词: 高速永磁电机, 过盈配合设计, 仿真研究, Workbench

Abstract:

Permanent magnet can't withstand the huge centrifugal force due to high speed when motor operation,an non-magnetic alloy cover which assembled by means of interference fit is commonly employed to protect permanent magnets.So the selection of interference is very important.A design method of the interference between rotor cover and permanent magnets was introduced,through a design example,the stress of rotor cover and permanent magnets under static assembly,cold operation and hot operation were calculated by analytical method,the process parameters of thermal assembly and separate speed was calculated,and it was verified by computer finite element simulation.The influencing factors of interference fit were studied,which provides a basis for the design of the interference between rotor cover and permanent magnets.

Key words: high speed permanent magnet machine, interference fit design, simulation research, Workbench