All this talk of Transformers......

Greetings all,
I'm on the lookout for a meaty transformer as the basis of a single to 3 phase converter for 3 to 4 HP This could be an auto transformer 230 in -415 out
or a 230in 115 out isolating transformer with some taps on the 230 volt winding enabling me to connect mains into a lower voltage tap designed for say 210v and put the secondary in series with the primary to get around 400-440 volts out.
Anyone got anything lying around to swap for beer vouchers or eternal gratitude etc??
TIA
Bob in Southampton area
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wrote:

That's one of the reasons I've got one. Haven't plumbed it in yet though... 240+110+55@5.
I'd much rather find a 240/415 transformer for a good price, but they don't seem to be as cheap or easy to get retail in on-offs at 2-3kVA sizes.
Mark Rand RTFM
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On Wed, 20 Dec 2006 22:47:21 +0000, Mark Rand

If you find a source tell us! My homebrew version is running two large 415v to 55-0-55 transformers "in reverse" with series input and parallel outputs (a Pentagrid Jim suggestion). Works OK Transwave will sell you a bare tranny as a start point.
Charles
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(usual disclaimers apply). Martin
--
martin<dot here>whybrow<at here>ntlworld<dot here>com



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Bob Minchin wrote:

Bob,
A few years ago someone here contacted one of the converter companies ("Boost"?) and persuaded them to sell a couple of transformers for a sensible (but not cheap) price - it might be worth a few calls.
Dave
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size=2>...</FONT></DIV> <DIV><FONT size=2>&gt; Bob Minchin wrote:<BR>&gt; &gt; Greetings all,<BR>&gt; &gt; <BR>&gt; &gt; I'm on the lookout for a meaty transformer as the basis of a single to 3<BR>&gt; &gt; phase converter for 3 to 4 HP<BR>&gt; &gt; This could be an auto transformer 230 in -415 out<BR>&gt; &gt; or<BR>&gt; &gt; a 230in 115 out isolating transformer with some taps on the 230 volt winding<BR>&gt; &gt; enabling me to connect mains into a lower voltage tap designed for say 210v<BR>&gt; &gt; and put the secondary in series with the primary to get around 400-440 volts<BR>&gt; &gt; out.<BR>&gt; &gt; <BR>&gt; &gt; Anyone got anything lying around to swap for beer vouchers or eternal<BR>&gt; &gt; gratitude etc??<BR>&gt; &gt; <BR>&gt; &gt; TIA<BR>&gt; &gt; <BR>&gt; &gt; Bob in Southampton area<BR>&gt; &gt; <BR>&gt; <BR>&gt; Bob,<BR>&gt; <BR>&gt; A few years ago someone here contacted one of the converter companies <BR>&gt; ("Boost"?) and persuaded them to sell a couple of transformers for a <BR>&gt; sensible (but not cheap) price - it might be worth a few calls.<BR>&gt; <BR>&gt; Dave</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>Hi Dave &amp; other respondants</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>Ive been in touch with both a transformer manufacturer (Douglas) and </FONT><A href="http://www.powercapacitors.co.uk/transwave.htm "><FONT size=2>http://www.powercapacitors.co.uk/transwave.htm </FONT></A><FONT size=2>.</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>The latter seem completely happy to sell the transformers that they use in their products. As an example, the tranny from this model</FONT></DIV> <DIV><A href="http://tinyurl.com/ybpcxj "><FONT size=2>http://tinyurl.com/ybpcxj </FONT></A></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>they will sell for 108 plus 10.50 carriage all plus vat total&nbsp;'bout 139</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>This is cheaper than Douglas. </FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>I guess this is not too bad a price although more beer vouchers than I currently have to spare for the project.</FONT></DIV> <DIV><FONT size=2>Maybe I could sell the excesses of Christmas socks, handkerchiefs, slippers etc on Fleabay to raise funds?</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>Regards</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV> <DIV><FONT size=2>Bob</FONT></DIV> <DIV><FONT size=2></FONT>&nbsp;</DIV></BODY></HTML>
------=
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single to 3

volt winding

say 210v

400-440 volts

eternal
companies
Hi Dave & other respondants
Ive been in touch with both a transformer manufacturer (Douglas) and http://www.powercapacitors.co.uk/transwave.htm .
The latter seem completely happy to sell the transformers that they use in their products. As an example, the tranny from this model http://tinyurl.com/ybpcxj
they will sell for 108 plus 10.50 carriage all plus vat total 'bout 139
This is cheaper than Douglas.
I guess this is not too bad a price although more beer vouchers than I currently have to spare for the project. Maybe I could sell the excesses of Christmas socks, handkerchiefs, slippers etc on Fleabay to raise funds?
Regards
Bob
Bob,
I bought a transformer direct from Transwave a few years back when I made a 10KW converter (I think it's the one Tim Leech now has) - they were excellent to deal with, brought it to the ME show at Wembley (that dates it!) and the chap even lugged it into my car boot as I had a dicky back at the time. I'd done a lot of searching arround and they were the best deal I could find.
AWEM
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Andrew, would that have been the converter that I gave you a whole load of capacitors in exchange for a 3 phase motor for my compressor a good few years ago? Your post just stirred my memory Bob
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wrote in message>

I
snip>
compressor
Yes Bob, that's the one - many years ago wasn't it !!!!
AWEM
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wrote:
Hang on until we move the factory. We used to have some 230/415 trannies for some spot welders that we sold, and I think the transformers may well be lurking under benches in the factory, covered in 20+ years of dead spiders and dust.
I'll have a tentative poke around after Xmas when we move out the coilwinding gear and have a bit of free space.
Peter -- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk http://www.prepair.co.uk
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Transformers (plural)?
Form an Orderly queue!
Mark Rand RTFM
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Mark Rand wrote:

Me too! :-)
Dave
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No promises! but they should still be there, somewhere....
Because the spot welders were 415V single-phase input, we had to have the trannies made to run them off 240V 13A sockets, and when the welders went I am sure we didn't let the transformers go with them.
We've been in the factory since it was new, 23 years this coming Xmas....
Seems like yesterday....
Peter -- Peter & Rita Forbes Email: snipped-for-privacy@easynet.co.uk Web: http://www.oldengine.org/members/diesel
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On Thu, 21 Dec 2006 23:10:07 +0000, Peter A Forbes

Peter I'm putting my hand in the air aswell! Count me in if you find a horde.
Charles
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Charles Ping wrote:

Indeed. Should you find a horde, I could be interested too :-).
Chris
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wrote:

I guess if we actually had a horde, we'd be looking for two new factories, not one!
New place is just round the corner from where we live, so a minute or so to walk to work each morning rather than hour and a half or more and the same at night.
Also nearly twice as big, so room for yet more junk.... :-))
Peter -- Peter & Rita Forbes Email: snipped-for-privacy@easynet.co.uk Web: http://www.oldengine.org/members/diesel
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Duly hanging on Peter!!
Thanks in advance
Bob
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