摘要：当代工业对高速传动系统的要求越来越高，传统的旋转电机无法满足这种要求。本文研究一种新型密封电机，具有较高的加速度性能、较大气隙且有良好的密封性能。该电机由两个独立部分组成：单极轴向磁轴承和一个装于不同高度的多极驱动单元，其转子半径远大于轴向长度，因此该结构被称为无轴承双面盘形电机。本文在分析电机两个机构方程与3D电气模型基础上，建立了详细的数学模型并给出设计思想。同时，该设计考虑了磁饱和与电接触等的非线性因素的影响。最后，设计出试验样机，并对其进行测试，结果表明，该无轴承电机满足设计要求并具有良好的控制性能。

关键词：无轴承电机；磁性悬浮；优化设计
Abstract: This paper presented a novel concept that combines crucial advantages such as high acceleration capability, large air gap and a compact motor setup. The basic idea is to separate a homopolar bearing unit axially from a multipolar drive unit on two different height levels. Hence, the proposed concept was denominated as “Bearingless 2Level Motor”. In this paper, the bearing and drive functionalities were explained in detail and design guidelines were given based on analytic equations and electromagnetic 3D simulations. Furthermore, the influence of nonidealities such as saturation and coupling effects were evaluated and included in the design. Finally, measurements on an experimental prototype exemplified the design considerations and proved the excellent performance of the new concept.

Key words: bearingless motor; magnetic suspension; optimal design