Research on an Axial Flux PMSM with Radially Sliding Permanent Magnets

Jing Zhao, Bin Li and Zhongxin Gu
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Jing Zhao: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Bin Li: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Zhongxin Gu: School of Automation, Beijing Institute of Technology, Beijing 100081, China

Energies, 2015, vol. 8, issue 3, 1-22

Abstract: Axial flux permanent-magnet synchronous machines (PMSMs) are very suitable candidates for the power train of electric vehicles (EVs) due to high power density and high efficiency. This paper researches an axial flux PMSM with radially sliding permanent magnets (PMs) to fulfill field-weakening control. The field weakening principle and the structure of this kind of axial flux PMSM by mechanical method of sliding PMs are proposed and analyzed. The influences of radially sliding PMs on magnetic flux density distribution, inductance, flux linkage and torque are analyzed and discussed based on 3D finite element method (FEM). The field weakening capabilities by mechanical method and electrical method are compared. The field weakening capability of the machine can be much improved by the optimized combination of the two methods, which is very satisfying for EV drive application. The forces on the PMs are analyzed and calculated. The hysteretic characteristics caused by the friction of the PMs are investigated, which provide useful reference for designing this kind of machine.

Keywords: axial flux; permanent magnet synchronous machine (PMSM); sliding permanent magnets; field weakening; inductance; hysteretic characteristic (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: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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