Yokeless Axial Flux Surface-Mounted Permanent Magnets Machine Rotor Parameters Influence on Torque and Back-Emf

Stanisław J. Hajnrych, Rafał Jakubowski and Jan Szczypior
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Stanisław J. Hajnrych: Faculty of Electrical Engineering, Warsaw University of Technology, 00-661 Warsaw, Poland
Rafał Jakubowski: Faculty of Electrical Engineering, Warsaw University of Technology, 00-661 Warsaw, Poland
Jan Szczypior: Faculty of Electrical Engineering, Warsaw University of Technology, 00-661 Warsaw, Poland

Energies, 2020, vol. 13, issue 13, 1-15

Abstract: The paper presents the results of a 3D FEA simulations series of a dual air gap Axial Flux (AF) electric machine with Surface-Mounted Permanent magnets (SPM) with parameterized rotor geometry. Pole number and pole span influence on back-emf, as well as cogging and ideal electromagnetic torques angular characteristics were investigated for each model with the common segmented yokeless stator with concentric windings. Synchronous and BLDC drives supply were used to estimate back-emf distortion. Ideal torque ripple and cogging torque spectra were analyzed. It was concluded that the number of poles closer to the number of slots with ~0.8 pole span tends to yield good torque density with the lowest cogging torque, back-emf distortion and ideal torque ripple.

Keywords: axial flux; motor; SPM; poles; pole span; yokeless; electric machine; synchronous; BLDC (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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