Zhu Qixuan, Lu Yujun, Shao Zhongkui
School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Longgang Institute of Zhejiang Sci-Tech University, Wenzhou 325802, China.
Sensors (Basel). 2024 Dec 22;24(24):8200. doi: 10.3390/s24248200.
This study addresses the challenges of magnetic circuit coupling and control complexity in active radial magnetic bearings (ARMBs) by systematically investigating the electromagnetic performance of four magnetic pole configurations (NNSS, NSNS, NNNN, and SSSS). Initially, equivalent magnetic circuit modeling and finite element analysis (FEA) were employed to analyze the magnetic circuit coupling phenomena and their effects on the magnetic flux density distribution for each configuration. Subsequently, the air gap flux density and electromagnetic force were quantified under rotor eccentricity caused by unbalanced disturbances, and the dynamic performances of the ARMBs were evaluated for eccentricity along the x-axis and at 45°. Finally, experiments measured the electromagnetic forces acting on the rotor under the NNSS and NSNS configurations during eccentric conditions. The results indicate that the NNSS configuration significantly reduces magnetic circuit coupling, improves the uniformity of electromagnetic force distribution, and offers superior stability and control efficiency under asymmetric conditions. Experimental results deviated by less than 10% from the simulations, confirming the reliability and practicality of the proposed design. These findings provide valuable insights for optimizing ARMB pole configurations and promote their application in high-speed, high-precision industrial fields such as aerospace and power engineering.
本研究通过系统研究四种磁极配置（NNSS、NSNS、NNNN和SSSS）的电磁性能，解决了有源径向磁轴承（ARMB）中的磁路耦合和控制复杂性挑战。首先，采用等效磁路建模和有限元分析（FEA）来分析每种配置的磁路耦合现象及其对磁通密度分布的影响。随后，在不平衡干扰引起的转子偏心情况下，对气隙磁通密度和电磁力进行了量化，并评估了ARMB沿x轴和45°偏心时的动态性能。最后，通过实验测量了偏心条件下NNSS和NSNS配置下作用在转子上的电磁力。结果表明，NNSS配置显著降低了磁路耦合，提高了电磁力分布的均匀性，并在非对称条件下提供了卓越的稳定性和控制效率。实验结果与模拟结果的偏差小于10%，证实了所提出设计的可靠性和实用性。这些发现为优化ARMB磁极配置提供了有价值的见解，并促进了它们在航空航天和电力工程等高速度、高精度工业领域的应用。
