A study of rotor pole shape of in-wheel direct drive SR motor

Takayasu Ogasawara, Hiroki Goto, Osamu Ichinokura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

A switched reluctance (SR) motor has an extremely simple and robust structure, and high heat capability because of no magnet. Therefore, these advantages are suitable for an application of the in-wheel direct drive SR motor to electric vehicles. Outer-rotor-type multipolar SR motors, however, have the invalid space where the inside of the stator core. The authors propose that a drive circuit is integrated into this space because of an effective use of interior space in the car. They developed the integrated type in-wheel SR motors and the electric vehicle which equipped with these SR motors underwent a driving trial. And yet it is necessary to accelerate more powerfully and expand the space to integrate the drive circuit. This paper presents an in-wheel SR motor improved torque density. The proposed SR motor, whose integrated space is broader and stator pole is longer than previously, has two features for improvement of torque density; the first one is asymmetrical rotor pole structure that torque is improved in only one rotational direction; the second one is the overlap of the excitation to increase effective voltage. In the proposed SR motor, the maximum torque volume ratio is about 38 N·m/L.

Original languageEnglish
Title of host publication2013 15th European Conference on Power Electronics and Applications, EPE 2013
DOIs
Publication statusPublished - 2013 Dec 17
Event2013 15th European Conference on Power Electronics and Applications, EPE 2013 - Lille, France
Duration: 2013 Sep 22013 Sep 6

Publication series

Name2013 15th European Conference on Power Electronics and Applications, EPE 2013

Other

Other2013 15th European Conference on Power Electronics and Applications, EPE 2013
Country/TerritoryFrance
CityLille
Period13/9/213/9/6

Keywords

  • Direct Drive
  • Electric vehicle
  • Simulation
  • Switched reluctance motor/machine (SRM)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Electrical and Electronic Engineering

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