400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 2001-01-0957 Development of Switched Reluctance Motor for EV Traction System Chiaki Umemura Aisin Seiki Co., Ltd. Reprinted From: Advanced Hybrid Vehicle Powertrains (SP–1607) SAE 2001 World Congress Detroit, Michigan March 5-8, 2001Downloaded from SAE International by Univ of California Berkeley, Sunday, August 05, 2018The appearance of this ISSN code at the bottom of this page indicates SAE’s consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition,however, that the copier pay a $7.00 per article copy fee through the Copyright Clearance Center, Inc.Operations Center, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sec-tions 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such ascopying for general distribution, for advertising or promotional purposes, for creating new collective works,or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Sales and Satisfaction Department. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department.To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wr itten permission of the publisher. ISSN 0148-7191 Copyright 2001 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is p ublished in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 3 00 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in the Global Mobility DatabaseDownloaded from SAE International by Univ of California Berkeley, Sunday, August 05, 201812001-01-0957 Development of Switched Reluctance Motor for EV Traction System Chiaki Umemura Aisin Seiki Co., Ltd. Copyright © 2001 Society of Automotive Engineers, In c ABSTRACT Switched Reluctance Motor (SRM) mainly has two advantageous characteristics such as no magnet andsimple construction. These characteristics contributelower cost and higher reliability compared with othermotor systems such as brushless permanent magnetmotors or induction motors. However, acoustic noiseand output torque ripple should be improved whenthe SRM is applied to a traction system for passengerelectric vehicle since these characteristics directlyaffect vehicle quietness and drivability.In this paper, we describe a system configuration ofthe SRM traction system for passenger electricvehicle. The SRM traction system includes anelectric motor, transmission gears and power invertermodule. Then, an approach to improve acousticnoise and output torque ripple is introduced.Generation mechanisms of acoustic noise and outputtorque ripple are analyzed. It is found that reduction of magnetic attractive force between a motor statorand a rotor is very important factor to reduce acousticnoise and output torque ripple. We have developeda control algorithm to optimize the magneticattractive force. This control algorithm is verifiedand evaluated through dynamometer and actualvehicle tests. As a result, we have successfullydeveloped the SRM traction system which can beapplica