Open AccessTorsional vibration analysis of the surface‐mounted permanent magnet synchronous machine using analytical model considering flux harmonics
Author(s) -
Ren Jie,
Zhao Wenliang,
Wang Xiuhe,
Xing Zezhi
Publication year - 2021
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/elp2.12044
Subject(s) - torsional vibration , harmonics , torque ripple , vibration , torque , finite element method , control theory (sociology) , magnet , stiffness , equations of motion , harmonic , engineering , voltage , physics , mechanics , structural engineering , acoustics , mechanical engineering , classical mechanics , direct torque control , computer science , electrical engineering , control (management) , artificial intelligence , induction motor , thermodynamics
The torsional vibration of the surface‐mounted permanent magnet synchronous machine (SPMSM) caused by torque ripple is analysed herein. First, an improved mathematic model of the SPMSM accounting for torsional vibration effect is proposed, which is composed of the voltage equation and motion equation. The voltage equation is established in abc coordinate taking flux harmonics into account, whereas the motion equation is derived based on a simplified two‐mass mechanical model. The perfect precision of the established model is verified by the finite element method (FEM) and experimental results. Then, an analytical method for analysing the machine steady‐state and dynamic torsional vibration response is used based on the proposed mathematic model. The torsional vibrations of a 6p/36s SPMSM under several conditions are analysed and compared. It is shown that the resonance caused by the 12‐th‐order torque harmonic may occur during the start‐up process. Furthermore, the operational speed range of the machine can be extended by suitably decreasing the stiffness coefficient.