Open AccessDesign of dual rotor axial flux permanent magnet generators with ferrite and rare-earth magnets
Author(s) -
Jawad Faiz,
Tohid Asefi,
Azeem Khan
Publication year - 2020
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee2004553f
Subject(s) - cogging torque , magnet , permanent magnet synchronous generator , electromagnetic coil , torque , ferrite (magnet) , torque ripple , generator (circuit theory) , mechanical engineering , shunt generator , materials science , electrical engineering , topology (electrical circuits) , automotive engineering , control theory (sociology) , engineering , computer science , physics , direct torque control , voltage , power (physics) , induction motor , control (management) , quantum mechanics , artificial intelligence , thermodynamics
This article addresses dual rotor axial flux Ferrite permanent magnet (PM) generator, as an alternative to a surface mounted and spoke types Nd-Fe-B generator which have concentrated windings. The performance parameters of all generators, particularly the efficiency, are identical. The design objective function is the generators mass minimization using a population-based algorithm. To predict the performance of the generators a finite element (FE) technique is applied. Besides, the aims of the design include minimizing cogging torque, examining different rotor pole topologies and different pole arc to pole pitch ratios. Three-dimensional FE technique is employed. It is shown that the surface mounted Ferrite generator topology cannot develop the rated torque and also has high torque ripple. In addition, it is heavier than the spoke type generator. Furthermore, it is indicated that the spoke type Ferrite PM generator has favorable performance and could be an alternative to rare-earth PM generators, particularly in wind energy applications. Finally, the performance of the designed generators is experimentally verified.