Analytical Calculation of the Magnetic Field Distribution in a Linear and Rotary Machine with an Orthogonally Arrayed Permanent Magnet

Lei Xu, Mingyao Lin, Xinghe Fu, Kai Liu and Baocheng Guo
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Lei Xu: Engineering Research Center for Motion Control of Ministry of Education, Southeast University, Nanjing 210096, China
Mingyao Lin: Engineering Research Center for Motion Control of Ministry of Education, Southeast University, Nanjing 210096, China
Xinghe Fu: Engineering Research Center for Motion Control of Ministry of Education, Southeast University, Nanjing 210096, China
Kai Liu: 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

Energies, 2017, vol. 10, issue 4, 1-18

Abstract: In this paper, an analytical model is proposed to analyze and predict the characteristics of a double stator linear and rotary permanent magnet machine (DSLRPMM). In order to simplify the magnetic field calculation, the DSLRPMM is cut along the axial direction ( z direction) and transferred into a planar one. Hence, an analytical model of the machine considered the orthogonal effect (OE) is proposed based on the combined solution of Maxwell’s equation, conformal mapping, and equivalent magnetic circuit model (EMCM). The magnetic field distributions of the DSLRPMM are calculated with and without considering the OE, and some important electromagnetic parameters, including the back electromotive force (EMF), detent force, cogging torque, and output torque and thrust, are also predicted and compared to the 3D finite element analysis (FEA). The results show that the errors between the proposed analytical model and the 3D FEA results are less than 0.2% and even less than 0.1% for certain parameters, that is, the results obtained from the proposed analytical model agree well with that of the FEA. Moreover, the analyzed and predicted results are also verified by the experimental results on the prototype of the DSLRPMM.

Keywords: 3D finite element analysis (FEA); analytical model; conformal mapping; equivalent magnetic circuit; linear and rotary machine (LRM); orthogonal magnetic field; permanent magnetic (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: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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