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Originally Posted by hyperasus
What is it used for?
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It is a submersible pump motor. This particular unit powers a pump (which I also rebuild) that goes inside a reverse-osmosis (RO) filtration system. This is a specially built motor that is made entirely of 316 stainless, has a special mechanical seal, and has a 17-4 PH mainshaft.
This particular motor and pump is heading back to a semiconductor manufacturer after being repaired. This particular customer of mine has about 15 of these units that run 'round the clock supplying clean water to the entire chip-fab.
Fabs from all over the country send their stuff here to be fixed. I also repair the pumps for Coca Cola that make Dasani drinking water.
It's a lot of work, -but it's still pretty cool stuff to work on. As a matter of fact, a lot of 3-phase AC induction motors are run on variable frequency drives (VFD's) that change the frequency of the AC, -esssentially doing the same thing as our ESC's do. The difference of course being that our ESC's are a form of "chopped DC", but the principle and operation is very very similar.