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Levitation control of an improved modular bearingless switched reluctance motor

机译：改进的模块化无轴承开关磁阻电动机的悬浮控制

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摘要

In order to reduce coupling between torque and suspending force in conventional bearingless switched reluctance motor (BLSRM), one 12/12 hybrid-stator-pole structure BLSRM was investigated. In this structure, motor consists of two single phase motor. Biased flux is provided by axial permanent magnet, which is installed between two motor in axial direction. However, axial permanent magnet occupies axial space, which results in increased axial length and decreased critical speed. Therefore, an improved modular BLSRM is proposed in this paper. In order to reduce axial space and improve critical speed, permanent magnet is designed to install in stator yoke. To realize steady levitation during rotor rotating, one simple levitation control strategy is put forward, which is benefitted from natural decoupling between torque and suspending force. In addition, digital control system including torque and suspending force is designed by means of TMS320F28335 and experimental platform is established. Finally, the improved BLSRM can be steadily levitated in the static and rotating conditions by experimental results.
机译：为了在传统的无轴承开关电动机（BLSRM）中的扭矩和悬挂力之间的耦合，研究了一个12/12杂化定子极结构BLSRM。在这种结构中，电机由两个单相电动机组成。偏置通量由轴向永磁体提供，轴向永磁体系在两个电动机之间轴向方向。然而，轴向永磁体占据轴向空间，这导致轴向长度增加和临界速度降低。因此，本文提出了一种改进的模块化平台。为了减少轴向空间并提高临界速度，设计用于在定子轭中安装。为了在转子旋转期间实现稳定的悬浮，提出了一种简单的悬浮控制策略，从扭矩和悬挂力之间的自然去耦产生了一种简单的悬浮控制策略。此外，通过TMS320F28335设计了包括扭矩和悬挂力的数字控制系统，并建立了实验平台。最后，通过实验结果，可以在静态和旋转条件下稳定地升高改进的BLSRM。

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