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<DIV><FONT face="Century Schoolbook">Anybody know a source for braided grounding
wire? Internet search fruitless......</FONT></DIV>
<DIV> </DIV>
<DIV>Holt E. Kelly<BR>Holtek Fireplace & Solar Products<BR>500 Jewell
Dr.<BR>Waco,Tx. 76712<BR>254-751-9111<BR>254-228-9621 (cell)<BR><A
href="mailto:holtek@sbcglobal.net">holtek@sbcglobal.net</A><BR></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=info@es-ee.com href="mailto:info@es-ee.com">Kurt Albershardt</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, August 22, 2008 12:57
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] motor starting
issues (was: offgrid systemquestion)</DIV>
<DIV><BR></DIV>--On Tuesday, August 19, 2008 7:57 AM -0700 Peter Parrish
<<A
href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</A>>
wrote:<BR>><BR>> Any motor will need both a voltage and current to
operate properly, and they tend to draw more and more current as the source
(inverter) voltage drops.<BR><BR><BR>Back to basic physics:<BR><BR>Depending
on design, electric motors can be constant power or constant torque (or some
combination of two) devices.<BR><BR>Three phase AC motors are generally
simpler in design and better behaved than either either single phase AC motors
or DC motors. Permanent magnet synchronous 3Ø AC motors (available now)
closely approach the theoretical limits of electromechanical motor systems in
general.<BR><BR>Modern power electronics and control systems give us
essentially perfect control of voltage, current, and frequency in AC
systems.<BR><BR>Intelligently combining the above allows us to design
efficient electromechanical systems which match nearly any complex supply
impedance. These systems also happen to live longer, fail less often,
and reduce both battery bank and inverter requirements.<BR><BR>The market
(arguably free on so many levels, and obviously not on so many others) can
address this using current technology. System sizing math not has
changed fundamentally in several decades but we are getting closer to those
fundamental limits.<BR><BR>Industrial systems are a bit ahead of the consumer
market in some areas but behind in others. As one very basic example,
Turbocor's maglev compressor has created a few waves in the commercial and
light industrial sector but I fully expect some fascinating trickle-down
benefits over next few years <<A
href="http://www.turbocor.com/products_technology/">http://www.turbocor.com/products_technology/</A>><BR><BR><BR><BR><BR><BR><BR><BR>.<BR><BR><BR>_______________________________________________<BR>List
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