Title :
Vibration of PM Brushless Machines Having a Fractional Number of Slots Per Pole
Author :
Chen, Y.S. ; Zhu, Z.Q. ; Howe, D.
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ.
Abstract :
In this paper, a method for predicting the electromagnetic vibration of permanent magnet (PM) brushless motors is presented. It calculates the electromagnetic force on individual stator teeth by the Maxwell stress method, based on two-dimensional finite-element analysis of the electromagnetic field. The resulting radial force contour is then used in an analytical shell model to predict the stator vibration. The method is validated experimentally, and is used to investigate the vibration in various PM brushless motors with different fractional slot/pole number combinations. The relationship between the slot/pole number combination and the dominant vibration frequency and mode order is also established
Keywords :
Maxwell equations; brushless DC motors; electromagnetic fields; electromagnetic forces; finite element analysis; permanent magnet motors; stators; vibrations; 2D finite-element analysis; Maxwell stress method; PM brushless machines; analytical shell model; electromagnetic field; electromagnetic force; electromagnetic vibration; permanent magnet brushless motors; radial force contour; stator teeth; stator vibration; Brushless machines; Brushless motors; Electromagnetic analysis; Electromagnetic fields; Electromagnetic forces; Finite element methods; Magnetic analysis; Stators; Stress; Teeth; Acoustic noise; brushless machines; electromagnetic force; permanent magnet machines; vibration;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879072
