Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...
Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...
Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Premium-efficiency motors...<br />
◊ Come with more durable bearings<br />
<br />
3/4 of midsized motor failures are<br />
caused by bearing failures<br />
◊ Automatically correct any iron<br />
damage from poor (most) past<br />
rewinds w/ stator burnout ovens<br />
<br />
Such damage wastes ~$1–3b/y in U.S.<br />
motors per GE (EASA notwithstanding)<br />
◊ Are less susceptible to such iron<br />
damage (though it’s better to use<br />
the nondestructive Thumm<br />
method→)<br />
<br />
Avoided iron loss plus sizing effects<br />
typically about doubles the savings<br />
compared with efficiency ratings alone<br />
Stators after Dreisilker<br />
(Thumm) stripping method<br />
Dreisilker (Thumm) stripping<br />
equipment<br />
Photos courtesy Dreisilker Electric Motors, Inc.