Analysis of Electric Machinery and Drive Systems, 3rd Edition 　　Paul Krause, Oleg Wasynczuk, Scott Sudhoff, Steven Pekarek 　　ISBN: 9781118024294 　　Copyright 2013 by John Wiley & Sons, Limited. All rights reserved. 　　Copyright 2015 by John Wiley & Sons, Limited and Tsinghua University Press. All rights reserved. 　　All Rights Reserved. Authorized translation from the English language edition published by John Wiley & Sons Limited. Responsibility for the accuracy of the translation rests solely with Tsinghua University Press Limited and is not the responsibility of John Wiley & Sons Limited. No part of this book may be reproduced in any form without the written permission of the original copyright holder, John Wiley & Sons Limited.