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An Improved Conformal Mapping Method for Static Angular Eccentricity Analysis of Axial Flux Permanent Magnet Machines

Journal of Magnetics, Volume 23, Number 1, 31 Mar 2018, Pages 27-34
Baocheng Guo * (School of Electrical Engineering, Southeast University), Yunkai Huang * (School of Electrical Engineering, Southeast University), Fei Peng (School of Electrical Engineering, Southeast University)
Abstract
This paper presents an improved and simple analytical model to study the static angular eccentricity of single stator single rotor axial-flux permanent-magnet (AFPM) machine. The magnetic flux densities in the air gap
under normal and static angular eccentricity are calculated by using a combination of Maxwell’s equations and Schwarz-Christoffel (SC) transformation. The original contribution of the model is that angular eccentricity is
obtained without extra transformations. Thus the proposed approach is simpler than existing methods. The calculated back electromotive forces (EMFs) and cogging torque by the proposed method are compared with those obtained from the finite element (FE) model, the results show acceptable accuracy of the proposed method. In this way, the effectiveness of the proposed method is verified.
 
Keywords: improved analytical model; axial flux PM machines; cogging torque; static declined eccentricity
DOI: https://doi.org/10.4283/JMAG.2018.23.1.027
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