Comparison of torque densities in alternate wound-field switched flux machines

Author

Zhou, Y.J. ; Zhu, Z.Q. ; Ge, Xing-Lai

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield, UK

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

2151

Lastpage

2157

Abstract

Three types of wound-field switched flux (WFSF) machines, namely, a 24-slot/14-pole WFSF machine, a 12-slot/8-pole segmental-rotor WFSF machine and an 18-slot/10-pole WFSF machine, are compared in terms of torque density, with Toyota Prius 2010 interior permanent magnet (IPM) machine as well as the conventional switched flux PM machine in this paper. According to two-dimensional (2-D) finite element analysis (FEA), it is found that the torque density of a WFSF machine can be increased further by employing unequal slots, and it can achieve ~80% as much as that of the IPM machine under the same current density. The material costs and efficiency maps of machines are also compared in this paper.

Keywords

automobiles; finite element analysis; permanent magnet machines; torque; 12-slot-8-pole segmental-rotor WFSF machine; 2D FEA; Toyota Prius 2010 IPM machine; conventional switched flux PM machine; current density; efficiency maps; interior permanent magnet machine; material costs; torque density; two-dimensional finite element analysis; wound-field switched flux machines; Current density; Ferrites; Magnetic flux; Stator windings; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2014 17th International Conference on

Conference_Location

Hangzhou

Type

conf

DOI

10.1109/ICEMS.2014.7013841

Filename

7013841