Test Results and Torque Improvement of the 50-kW Switched Reluctance Motor Designed for Hybrid Electric Vehicles

Author

Takeno, Motoki ; Chiba, Akira ; Hoshi, Nobukazu ; Ogasawara, Satoshi ; Takemoto, Masatsugu ; Rahman, M. Azizur

Author_Institution

Tokyo Univ. of Sci., Noda, Japan

Volume

48

Issue

4

fYear

2012

Firstpage

1327

Lastpage

1334

Abstract

A switched reluctance motor (SRM) has been developed as one of the possible candidates of rare-earth-free electric motors. A prototype machine has been built and tested. It has competitive dimensions, torque, power, and efficiency with respect to the 50-kW interior permanent magnet synchronous motor employed in the hybrid electric vehicles (Toyota Prius 2003). It is found that competitive power of 50-kW rating and efficiency of 95% are achieved. The prototype motor provided 85% of the target torque. Except the maximum torque, the most speed-torque region is found to be covered by the test SRM. The cause of discrepancy in the measured and calculated torque values is examined. An improved design is attempted, and a new experimental switched reluctance machine is designed and built for testing. The results are given in this paper.

Keywords

angular velocity; hybrid electric vehicles; permanent magnet motors; reluctance motors; synchronous motors; torque; SRM test; competitive dimensions; hybrid electric vehicles; interior permanent magnet synchronous motor; power 50 kW; prototype machine; prototype motor; rare-earth-free electric motors; speed-torque region; switched reluctance machine design; switched reluctance motor design; target torque; torque improvement; Iron; Loss measurement; Power generation; Reluctance motors; Shafts; Torque; Efficiency map; 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.2012.2199952

Filename

6200844