400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.org 2005-01-0271 The Motor Control Technologies for High-Power Hybrid System Hideaki Yaguchi and Shoichi Sasaki Toyota Motor Corporation Reprinted From: Advanced Hybrid Vehicle Powertrains 2005 (SP-1973) 2005 SAE World Congress Detroit, Michigan April 11-14, 2005 SAE TECHNICAL PAPER SERIESDownloaded from SAE International by University of Minnesota, Thursday, August 02, 2018The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE’s peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. 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: 724-772-4891 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] ISSN 0148-7191Copyright © 2005 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 to Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of Minnesota, Thursday, August 02, 20182005-01-0271 The Motor Control Technologies for High-Power Hybrid System Hideaki Yaguchi and Shoichi Sasaki Toyota Motor Corporation Copyright © 2005 SAE International ABSTRACT The Rx400h, which was put on the market in 2005, realized overwhelming power performance with the adoption of a high-voltage system, high-power output motor, and 3-motor type 4WD. Toyota has been working on a solution to increase the output power of the motor, i.e., the development of syst em stabilization technology. This paper introduces high-speed power balance control, which keeps the balance of power constant regardless of rapid changes in the number of motor rotations resulting from slipping tires or other factors, along with sensor error compensation control, which suppresses cyclic power fluctuation resulting from errors in the position sensor of the motor. INTRODUCTION While there is a growing concern about environmental problems in the world, such as global warming, it is the responsibility and important task of the engineers of automobile manufacturers to develop environment-friendly vehicles with better fuel efficiency, and put them into practical use. Toyota Motor Corporation released its first mass-production type hybrid vehicle Prius in the market in December 1997. In September 2003, Toyota evolved the vehicle into the epoch-making system THSII(Prius), which incorporates a voltage boost converter and ensures high output and excellent fuel efficiency. The Rx400h was put on the market in a new category called SUV in 2005. This vehicle is based on THSII (Prius), and features an overwhelming high performance motor output t hat is approximately 2.5 times that of the Prius. This high motor output is supported by a higher voltage system than Prius, along with an increase to the number of motor revolutions. In other words, this vehicle prov ides the user with not only environmental performance, but also unique driving pleasure that only the SUV can ensure. On the other hand, the robustness of the h