Analytical Modeling of Static Eccentricities in Axial Flux Permanent-Magnet Machines with Concentrated Windings

Yunkai Huang, Baocheng Guo, Ahmed Hemeida and Peter Sergeant
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Yunkai Huang: Engineering Research Center for Motion Control of Ministry of Education, Southeast University, Nanjing 210096, China
Baocheng Guo: Engineering Research Center for Motion Control of Ministry of Education, Southeast University, Nanjing 210096, China
Ahmed Hemeida: Department of Electrical Energy, Systems and Automation, Ghent University, Ghent B-9000, Belgium
Peter Sergeant: Department of Electrical Energy, Systems and Automation, Ghent University, Ghent B-9000, Belgium

Energies, 2016, vol. 9, issue 11, 1-19

Abstract: The aim of this paper is to calculate the static eccentricity (SE) of a double rotor axial flux permanent magnet (AFPM) machine by using a general analytical model. The flux density in the air gap under healthy conditions is calculated firstly, where the axial and circumferential magnetic flux densities are obtained using a coupled solution of Maxwell’s equations and Schwarz-Christoffel (SC) mapping. The magnetic flux densities under SE conditions are calculated afterwards using a novel bilinear mapping. Some important electromagnetic parameters, e.g., back electromotive force (EMF), cogging torque and electromagnetic (EM) torque, are calculated for both SE and healthy conditions, and compared with the finite element (FE) model. As for the double rotor AFPM, SE does not contribute much effect on the back EMF and EM torque, while the cogging torque is increased. At each calculated section, FE models were built to validate the analytical model. The results show that the analytical predictions agree well with the FE results. Finally, the results of analytical model are verified via experimental results.

Keywords: analytical model; axial flux permanent magnet (AFPM) machines; back electromotive force (EMF); conformal mapping (CM); double rotor; static eccentricity (SE); Finite element (FE) model; torque (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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