AUTHOR : Myung-Hwan Yoon, Kyu-Seob Kim, Seung-Hee Chai, Jung-Pyo Hong
ORGANIZATION : CEFC 2014
JOURNAL :
YEAR : 2014.05
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ISSUE :
PAGE : ~
An analytical method for calculating the magnetic field in surface-mounted permanent synchronous magnet machines (SPMSM) with rotor eccentricity is suggested. In case of rotor eccentricity, boundary conditions between core and permanent magnet, air and permanent magnet, air and core are not appropriate for cylindrical coordinates due to different thickness of permanent magnet in circumferential direction. In this paper, analytical method of spatial harmonic analysis for SPMSM with rotor eccentricity is suggested. Permanent magnet with eccentricity is divided into pieces and boundary condition is applied separately to each piece and air gap flux density can be obtained by the potential in air gap. Therefore spatial harmonic analysis can be applied with the same governing equations and boundary conditions for motor without eccentricity. The exact solution can be obtained with the suggested method and this method is useful for the analysis of motor with rotor eccentricity.