通过引入同极型径向主动磁悬浮轴承(AMB)和轴向永磁轴承(PMB)建立了低损耗磁悬浮电主轴试验装置,给出了主要设计过程和结构参数,分析了磁悬浮电主轴的动态性能,并通过系统的高速旋转试验进行了验证.研究结果表明:该试验装置结构简单,功耗较小,能够平稳越过前2阶临界转速并在40 000r/min稳定运行,最大振幅为7μm. A low-loss magnetic levitation spindle test device was established by introducing the same type of radial active magnetic bearing (AMB) and axial permanent magnet bearing (PMB). The main design process and structural parameters were given. The dynamic performance of the magnetic levitation spindle The experimental results show that the experimental device has the advantages of simple structure and low power consumption, and it can smoothly cross the first two critical speeds and run stably at 40 000 r / min with a maximum amplitude of 7 μm.