Reduction of Pole-Frequency Vibration of Surface-Mounted Permanent Magnet Synchronous Machines With Piecewise Stagger Trapezoidal Poles

An optimization method of the piecewise stagger trapezoidal poles is proposed for the reduction of the pole-frequency vibration of the surface-mounted permanent magnet synchronous machines (SPMSMs) in this article. By offsetting the zero-crossing region of flux density, this method can weaken the po...

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Bibliographic Details
Published inIEEE transactions on transportation electrification Vol. 9; no. 1; pp. 833 - 844
Main Authors Li, Zexing, Xia, Jiakuan, Guo, Zhiyan, Lu, Bingna, Ma, Gongchen
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.03.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Analytical models
Electromagnetic properties
Finite element method
Flux density
Force
Harmonic analysis
Magnetic flux
Mathematical analysis
Mathematical models
Multiphysics coupling model
Optimization
Permanent magnets
piecewise stagger trapezoidal poles
pole-frequency vibration
Poles
Prototypes
surface-mounted permanent magnet synchronous machines
Synchronous machines
Tensors
Torque
Vibration
Vibrations
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Summary:An optimization method of the piecewise stagger trapezoidal poles is proposed for the reduction of the pole-frequency vibration of the surface-mounted permanent magnet synchronous machines (SPMSMs) in this article. By offsetting the zero-crossing region of flux density, this method can weaken the pole-frequency force harmonic while ensuring the torque density. First, based on the Maxwell tensor method, the analytical model of concentrated force acting on the teeth is deduced. Taking a 10-pole/12-slot SPMSM as an example, the deep cause of the pole-frequency radial force harmonic is analyzed. Then, the weakening mechanism of the piecewise stagger trapezoidal poles for the pole-frequency radial force harmonic is revealed with the finite-element model (FEM). Based on the multiphysics coupling model, the key electromagnetic properties and vibration spectrum between the common and proposed motors are compared. The results show that the piecewise stagger trapezoidal pole structure has a significant suppression effect on the pole-frequency vibration. Finally, the vibration experiment of the two prototypes is carried out, and the effectiveness of the optimized structure is verified.
ISSN:2332-7782
2577-4212
2332-7782
DOI:10.1109/TTE.2022.3202868