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1

School of Automation, Beijing Institute of Technology, Beijing 100081, China

2

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150080, China





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Author to whom correspondence should be addressed.



Academic Editor: Omar Hegazy

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. View Full-Text

Keywords: axial flux; permanent magnet synchronous machine PMSM; sliding permanent magnets; field weakening; inductance; hysteretic characteristic axial flux; permanent magnet synchronous machine PMSM; sliding permanent magnets; field weakening; inductance; hysteretic characteristic





Autor: Jing Zhao 1,2, Bin Li 1,* and Zhongxin Gu 1

Fuente: http://mdpi.com/



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