Modeling and Analysis of Electromagnetic Force, Vibration, and Noise in Permanent-Magnet Synchronous Motor Considering Current Harmonics

• Published in: IEEE transactions on industrial electronics (1982) Vol. 63; no. 12; pp. 7455 - 7466
• Main Authors: Lin, Fu, Zuo, Shuguang, Deng, Wenzhe, Wu, Shuanglong
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Analytical models; Current harmonics; Electromagnetic forces; electromagnetic vibration and noise; Fast Fourier transformations; Finite element method; Force; Force distribution; Fourier transforms; Harmonic analysis; Harmonics; lowest spatial order force; Mathematical analysis; Noise; Numerical models; Permanent magnets; permanent-magnet synchronous motor (PMSM); stator modeling; Stators; Stress concentration; Synchronous motors; Vibration analysis; vibration and noise prediction; Vibrations
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2016.2593683

This paper first derives the characteristics of radial electromagnetic force considering different types of current harmonics. By using two-dimensional fast Fourier transform, the force calculated by the finite element method is decomposed to obtain the frequencies of the force components in specific spatial order. Then, a multiphysics model for electromagnetic vibration and noise calculation is proposed. A modal test is implemented to validate the equivalent stator model and the nonuniform distribution of electromagnetic force acting on the teeth surface is taken into account through the nodal force transfer method. The calculated vibration and noise agree well with those obtained from experimental test. Finally, vibration and noise under different supply currents are investigated, and the variation patterns of the noise and vibration peaks are explained by the amplitude changes of the lowest spatial order force due to current harmonics. It is found that the influence of current harmonics on vibration and noise depends on their effect on the lowest spatial order force, and in order to figure out this effect, the phase angle, phase sequence, and frequency of current harmonics should all be considered.