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对永磁偏置的主动磁悬浮轴承 (永磁电磁轴承 )产生悬浮力的机理进行了研究 ,导出了永磁磁通与电磁磁通同时作用时永磁电磁轴承的磁路基本方程及吸力方程 ,说明了永磁参数对永磁电磁轴承承载能力及刚度系数的影响。结果表明 :当偏置磁通大于饱和磁通的一半时 ,实际承载能力为最大 ;增大永磁内部磁动势可以提高轴承的承载力、稳定性及减小功放损耗。
The mechanism of levitation force of permanent magnetic bearings (permanent magnetism magnetic bearings) with permanent magnet bias is studied. The basic equations and suction equations of the magnetic circuit of permanent magnetism magnetic bearings are deduced when the permanent magnetic flux and the electromagnetic flux act simultaneously. The effect of permanent magnet parameters on the bearing capacity and stiffness coefficient of permanent magnet electromagnetic bearing is illustrated. The results show that when the bias magnetic flux is greater than half of the saturation flux, the actual carrying capacity is the maximum. Increasing the magnetomotive force inside the permanent magnet can increase the bearing capacity and stability of the bearing and reduce the power loss.