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<DIV><FONT face=Arial size=2>Hello,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Does anyone know of published research that relates
motor efficiency to percent load as well as drive frequency?</FONT></DIV>
<DIV><FONT face=Arial size=2>We have motor curves for efficiency vs. percent
load, but these curves all assume a nominal speed that is being maintained as
load decreases. What happens to your motor efficiency when you are also
changing the drive frequency?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for any leads.</FONT></DIV>
<DIV><FONT face=Arial size=2>Sincerely,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Alec Stevens, PE<BR>DMI<BR>450 Lexington St,
Newton, MA 02466<BR>p: 617-527-1525 x105 f: 617-527-6606<BR>e: <A
href="mailto:astevens@dmiinc.com">astevens@dmiinc.com</A></FONT></DIV></BODY></HTML>