Spitzer, David W. <br/><br/>
Variable speed drives :  principles and applications for energy cost savings / 
David William Spitzer 
 - 4th ed. 
 - New York :  Momentum Press,  2013 
 - vii, 213 p. :  ill. ;  27 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781606503638 (hbk.) 1606503634 (hbk.) 9781606503652 (ebk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Variable speed drives