400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-0790 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2008-01-1829 Development of a High Performance Electric Vehicle with Four-Independent-Wheel Drives Zhao Yan-e, Zhang Jianwu and Han Xu Shanghai Jiao Tong University, China 2008 SAE Internati onal Powertrains, Fuels and Lubricants Congress Shanghai, China June 23-25, 2008Downloaded from SAE International by University of British Columbia, Wednesday, September 26, 2018By mandate of the Engin eering Meetings Board, th is paper has been approved for SAE publication upon completion of a peer review process by a minimum of three (3) industry experts under the supervision of the session organizer. All 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]: 724-772-4028Fax: 724-776-3036 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-0790Email: Customer [email protected] ISSN 0148-7191Copyright © 2008 SAE InternationalPositions 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 British Columbia, Wednesday, September 26, 2018, ABSTRACT A new concept electric vehicle (EV) with four-in-wheel motor is developed to make EVs spread widely. Each motor is mounted inside a wheel and can be controlled individually. The batteries and electrical components are placed in the hollow space of frame structure under the seats. Such a compact configuration permits packaging flexibility by eliminating the central drive motor and driveline components, incl uding the transmission, the mechanical differential, the universal joints and the drive shaft. Apart from many mechanical advantages of such a structure, high performanc es of chassis control systems such as traction control, electronic differential control, direct yaw moment control and regenerative braking control systems are employed due to the rapid response and precise torque control of the motor. Simulation is conducted in ADVISOR and Matlab/Simulink environment. The results indicate that the performances of the four-in-wheel motor drive EV are significantly improved owning to the application of the innovative structure and advanced control systems. INTRODUCTION The exhaust gas and noise of fuel-using motors are becoming the greatest social hazard of pollution in high-populated areas of the world. El ectric vehicle (EV) offers one of the best solutions to improve the air quality and reduce the reliance on fossil fuels to power vehicles [1-5]. Most of the EVs have been converted from existing Internal Combustion Engine Vehicles (ICEVs). Although the converted EVs have the characteristics of easy to produce and less expensive to develop, it is difficult to fully utilize the advantages of the motor drive system [4]. Therefore, EVs design must take advantage of these virtues, which could only be incorporated into EVs. An innovation configuration for el ectric vehicle is all-wheel- drive, in which each wheel is driven individually by a motor. Motors transmit the powers through a set of transmission system or directly connect to the wheels,