Title :
A permanent-magnet machine with improved torque density based on a single layer winding layout for electric vehicle applications
Author :
Abdel-khalik, A.S. ; Gadoue, S. ; Ahmed, S. ; Massoud, A.
Author_Institution :
Electr. Dept., Alexandria Univ. Alexandria, Alexandria, Egypt
Abstract :
This paper proposes a novel single layer winding layout for a permanent magnet machine with improved torque density for electric vehicle applications. In this paper, two permanent-magnet (PM) machines with outer rotors and single layer fractional slot concentrated windings are compared based on two different slot/pole combinations, namely 20 slots/18 poles and 20 slots/22 poles. The two machines are inherently five-phase machines; however, a winding layout is employed to create three-phase stator terminals. Hence, the proposed machines exploit the advantages of multiphase machines while providing three phase terminals allowing for standard three-phase converters. Two machines are designed with same rotor and stator dimensions and same stator winding layout but with different number of rotor poles. The comparison is carried out using finite element analysis.
Keywords :
electric vehicles; finite element analysis; permanent magnet machines; rotors; stators; electric vehicle applications; finite element analysis; five-phase machines; multiphase machines; permanent-magnet machine; rotor poles; single layer fractional slot concentrated windings; single layer winding layout; slot/pole combinations; stator winding layout; three phase terminals; three-phase converters; three-phase stator terminals; torque density; Electric vehicles; Layout; Rotors; Stator windings; Torque; Windings; Permanent magnet (PM) machines; cogging torque; electric vehicles; single layer winding; torque ripples;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048965