Analysis of MMF and back-EMF waveforms for fractional-slot concentrated-wound permanent magnet machines

Author

Farshadnia, M. ; Dutta, Ritaban ; Fletcher, John E. ; Ahsanullah, K. ; Rahman, M.F. ; Lovatt, H.C.

Author_Institution

Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales, Sydney, NSW, Australia

fYear

2014

fDate

2-5 Sept. 2014

Firstpage

1976

Lastpage

1982

Abstract

An analytical modelling technique to calculate the generated magneto-motive force (MMF) and back-EMF of fractional slot concentrated wound (FSCW) permanent magnet synchronous machines (PMSMs) is reported. The generated MMF of a FSCW stator is analyzed and modelled using a Fourier series technique. General expressions of the harmonic winding factors for FCSW stators with different slot-pole combinations are then obtained. A general expression for the generated back-EMF of FSCW PMSMs is then derived. The obtained analytical results are validated through finite-element analysis (FEA) and experimental tests on a prototype FSCW PMSM. A comparison between the generated voltages of various FSCW stator topologies is also performed.

Keywords

Fourier series; electric potential; finite element analysis; permanent magnet machines; synchronous machines; Fourier series technique; MMF; back EMF waveforms; finite element analysis; fractional slot concentrated wound permanent magnet machines; harmonic winding factors; magnetomotive force; synchronous machines; Coils; Harmonic analysis; Power capacitors; Rotors; Stator windings; Windings; Winding function; fractional-slot concentrated winding (FSCW); magnetomotive force (MMF); permanent magnet synchronous machine (PMSM); space harmonics; winding factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2014 International Conference on

Conference_Location

Berlin

Type

conf

DOI

10.1109/ICELMACH.2014.6960455

Filename

6960455