Torque Density and Efficiency Improvements of a Switched Reluctance Motor Without Rare-Earth Material for Hybrid Vehicles

Author

Chiba, Akira ; Takano, Yuichi ; Takeno, Motoki ; Imakawa, Takashi ; Hoshi, Nobukazu ; Takemoto, Masatsugu ; Ogasawara, Satoshi

Author_Institution

Tokyo Inst. of Technol., Tokyo, Japan

Volume

47

Issue

3

fYear

2011

Firstpage

1240

Lastpage

1246

Abstract

A machine design of a switched reluctance motor having competitive torque and efficiency as well as compactness with respect to an interior permanent-magnet (IPM) synchronous motor (IPMSM) in a hybrid electric vehicle (Toyota Prius 2003) has been investigated. A torque of 400 N·m is set as a target with an outer diameter of 269 mm with an axial length of 156 mm, including coil end lengths. In addition, a 50-kW field weakening capability must be competitive to the IPMSM. The highest efficiency of 95% is also aimed. Stator and rotor structures and iron material are investigated. Test machines are built. Static and light load tests are carried out.

Keywords

hybrid electric vehicles; machine testing; permanent magnet motors; reluctance motors; rotors; stators; torque; IPMSM; efficiency improvement; field weakening capability; hybrid electric vehicle; iron material; light load test; machine design; permanent magnet synchronous motor; power 50 kW; rotor structure; size 156 mm; size 269 mm; static test; stator structure; switched reluctance motor; test machine; torque density; Iron; Permanent magnet motors; Reluctance motors; Stator windings; Steel; Torque; Efficiency; hybrid vehicles; switched reluctance motor (SRM); torque density;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2011.2125770

Filename

5728864