400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.orgSAE TECHNICAL PAPER SERIES 2004-01-0567 Development of Traction Motor for Fuel Cell Vehicle Hiroyuki Satoh, Shigemitsu Akutsu, Tomoya Miyamura and Hiroaki Shinoki Honda R&D Co., Ltd. Tochigi R&D Center Reprinted From: Advanced H ybrid Vehicle Powertrains 2004 (SP-1833) 2004 SAE World Congress Detroit, Michigan March 8-11, 2004Downloaded from SAE International by University of Minnesota, Thursday, August 02, 2018All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,without the prior written permission of SAE. For permission and licensing requests contact: SAE Permissions 400 Commonwealth DriveWarrendale, PA 15096-0001-USAEmail: [email protected]: 724-772-4891Tel: 724-772-4028 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-1615Email: Customer [email protected] ISBN 0-7680-1319-4Copyright © 2004 SAE International 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 pap er if it is publishe d in SAE Transactions. Persons wishing to submit papers to be considered for presentation or publication by SAE should send themanuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of Minnesota, Thursday, August 02, 20182004-01-0567 Development of Traction Motor for Fuel Cell Vehicle Hiroyuki Satoh, Shigemitsu Akutsu, Tomoya Miyamura and Hiroaki Shinoki Honda R&D Co., Ltd. Tochigi R&D Center ABSTRACT This motor adopted a salient pole type surface permanent magnet rotor, which enables it both to produce reluctance torque and to minimize the use of magnets. The inductance value is set at the limit value enabling output at the maximum rotor speed, which suppresses field-weakening current. The utilization of the magnets enables continuous operation at the maximum rotor speed by suppressing eddy current loss by means of magnet surface insulation and magnet segmentation. Strength reliability at high rotor speeds has been assured by applying the Weibull-theory as a method of evaluating the strength of magnets. INTRODUCTION Heightened worldwide awareness of environmental issues has increased demand for the production of low emission vehicles and the reduction of the level of CO 2 in automotive exhausts to combat global warming. The development of fuel cell vehicles as one fundamental response to these demands has therefore become an urgent issue. In December 2002, Honda led the world in marketing a fuel cell vehicle. The use of fuel cells enables a significant increase in power over conventional batteries, and development of the Honda fuel cell vehicle therefore aimed at a high level of dynamic performance to make the vehicle more commercially viable than a conventional battery electric vehicle. The power and rotational speed of the traction motor for the fuel cell vehicle were significantly increased over the that of the traction motor used in the EV PLUS electric vehicle (MCF11 below) (1) marketed in 1997. Development of the motor proceeded using an already existing prototype small, high-efficiency traction motor (2) as a base, for which performance and specification targets were established to enable installation in a vehicle framework of more than 1.6 tons. This paper will discuss the technologies employed in the development of the traction motor for the Honda FCX fuel cell vehicle (MCF21 below) and the level of performance that they have enabled. SETTING OF MOTOR CONSTAN