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标 题： A general electromagnetic model and vibration control for shape deviations in PMSM supported by three-pole active magnetic bearings
基于三极主动磁悬浮轴承的永磁同步电机形状偏差的一般电磁模型与振动控制
作 者： Xu, Xueping
Han, Qinkai
关键词： Elliptical deviation  [椭圆偏差]
Corrugated deviation  [ 波纹偏移]
Electromagnetic vibration  [ 电磁振动]
PMSM  [ PMSM]
Active magnetic bearings  [ 主动磁悬浮轴承]
Vibration control  [ 振动控制]
出版年： 2021
期刊名： Mechanical Systems & Signal Processing
机械系统与信号处理
年卷期： 2021, vol.158
摘 要： Shapes deviations in electrical machines are inevitable due to the mechanical stress and uneven temperature, which leads to electromagnetic-magnetic interactions and unwanted vibrations. A general electromagnetic model for the elliptical and corrugated shape deviations is proposed in this paper for the first time. The air & ndash;gap length of a permanent magnet synchronous motor (PMSM) with shape deviations is clearly expressed and the electromagnetic excitations are obtained. The three-pole active magnetic bearing (AMB) with simple structure is adopted to suppress the vibration and integrated into the PMSM system. The mechanism of forces generated by the AMB is revealed. The iterative sliding mode control is applied in the control design. Dynamic responses for different combinations of elliptical deviation and corrugated deviation are obtained, and effects of shape deviations in PMSM on vibration characteristics are demonstrated. Excellent performances of the control method for different shape deviation degrees and rotating speeds are achieved and compared. Experiments of a PMSM with elliptical deviations are conducted and vibration control behaviors are analyzed. Results indicate that the existence of shape deviations will increase the vibration displacement. Moreover, the elliptical shape deviation will break the symmetry of the rotor orbit, while the symmetry can be maintained for the corrugated shape deviation. The three-pole AMB together with iterative sliding mode control can be applied for the vibration control of a shape defective PMSM for different rotating speeds. The proposed model for shape deviations and idea of vibration control can improve the insight into dynamic characteristics of electrical machines.

由于机械应力和温度不均，电机的形状偏差不可避免，从而引发电磁相互作用和不必要的振动。本文首次提出了一种适用于椭圆形和波纹形形状偏差的通用电磁模型。空气与对存在形状偏差的永磁同步电机（PMSM）的间隙长度进行了明确表达，并获得了电磁激励响应。采用结构简单的三极主动磁悬浮轴承（AMB）以抑制振动，并将其集成到PMSM系统中，揭示了AMB产生的力机制。在控制设计中应用了迭代滑模控制方法，得到了不同椭圆偏移和波纹偏移组合下的动态响应，展示了形状偏差对PMSM振动特性的影响。针对不同形状偏差程度和转速，对比分析了该控制方法的优异性能。开展了具有椭圆偏移的PMSM实验，并分析了其振动控制行为。结果表明，形状偏差的存在会增大振动位移； 此外，椭圆形状偏差会破坏转子轨道的对称性，而波纹形状偏差则可保持轨道对称性。三极AMB结合迭代滑模控制可用于不同转速下形状缺陷的永磁同步电机振动控制。所提出的形状偏差模型及振动控制思路有助于加深对电机动态特性的理解。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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