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90 volt DC motor Controllers
Posted: Sun Apr 27, 2014 7:00 am
by jwax
Have a few of these from Minarik- Model RG101UC.
120 VAC input. See them on ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... _351wt_887
Re: 90 volt DC motor Controllers
Posted: Sun May 04, 2014 7:26 pm
by dacflyer
what did they come out of ? - just curious
Re: 90 volt DC motor Controllers
Posted: Mon May 05, 2014 3:45 am
by jwax
Hi dacflyer,
They came out of a thin film sputtering machine, made to move plates of metal through a processing chamber. Big sucker- about 30 feet long. It was "decommissioned" (scrapped) for the stainless steel.
John
Re: 90 volt DC motor Controllers
Posted: Wed May 07, 2014 10:48 am
by dacflyer
gotchya...BTW what is a film sputtering machine ?
only thing i know about sputtering is old engines and black deposits from lights, like neon , fluorescents and other such items..
Re: 90 volt DC motor Controllers
Posted: Wed May 07, 2014 1:32 pm
by jwax
Ya- I had an old Chevy that was prone to sputtering too!
Thin Film sputtering is a process to deposit thin, very controllable films of materials unto a substrate.
http://en.wikipedia.org/wiki/Sputtering
We were depositing Copper, Indium and Gallium on sheets of glass to make solar panels.
Re: 90 volt DC motor Controllers
Posted: Wed May 07, 2014 8:10 pm
by dacflyer
cool... sounds like they were the Amorphous type, or thin film technology.
Re: 90 volt DC motor Controllers
Posted: Thu May 08, 2014 3:43 am
by jwax
Amorphous solar cells are thin film silicon, ours are CIGS: Copper, Indium, Gallium and Selenium.
Re: 90 volt DC motor Controllers
Posted: Fri May 09, 2014 9:45 am
by dacflyer
ya, i got that later on after reading more
Re: 90 volt DC motor Controllers
Posted: Thu May 15, 2014 5:37 am
by Lenp
Just a jump in here...
I saw selenium mentioned and remembered that many years ago, if a selenium rectifier was dissembled, the paint was stripped and contact was made to both sides of a plate you had a primitive solar cell. Guess i'm just a bit surprised it took so long to get from there to here with the technology!
Len
Re: 90 volt DC motor Controllers
Posted: Thu May 15, 2014 2:13 pm
by jwax
Yes, there are many combinations of materials that exhibit the photoelectric effect, besides selenium. The tricky bit is to get enough conversion efficiency to make building it worthwhile.