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Lookup NU author(s): Dr Xu DengORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Notch filters (NFs) are widely applied in the five-degrees of freedom (5-DoFs) magnetic levitation motors to reduce the vibration near the resonant frequency. However, due to the existence of axial thrust disk, rotor masses at the two ends of the shaft are generally different. It not only increases the difficulty of NF design, but also reduces of fatigue life of rotor system. Therefore, a cross displacement control (CDC) method is proposed in this paper to synchronize the displacements at the two ends, which reduces the number of NFs and improves the fatigue life of rotor system. Simulation and experimental results show that the fatigue life of rotor system can be improved by 17.70 times, 21% and 10% at 4000 r/min, 10000 r/min and 20000 r/min, respectively. On the basis of that, the phase-shift NF can also be added to reduce the vibration near the resonant frequency. Experimental results verify that the fatigue life of rotor system can be improved by 26.5% near the resonant frequency with proposed strategy, and the adjustable time of displacement can also be reduced by 51.7%.
Author(s): Yu Q, Cao X, Deng X, Deng Z, Wang M
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Energy Conversion
Year: 2026
Pages: epub ahead of print
Online publication date: 19/03/2026
Acceptance date: 02/04/2025
Date deposited: 29/07/2026
ISSN (print): 0885-8969
ISSN (electronic): 1558-0059
Publisher: IEEE
URL: https://doi.org/10.1109/TEC.2026.3675728
DOI: 10.1109/TEC.2026.3675728
ePrints DOI: 10.57711/w9z5-2s22
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