24-05-2012, 04:55 PM
Hi,
Thanks for asking Joe but in this case it's a matter of buying the DVD's from Doug as the three DVD's run to six hours viewing and I thought well worth the £17 or so I paid for them; they are more interesting to watch than the usual programs on TV these days.
It wouldn't be fair to Doug if I gave all the details but I can say that any transformer can be wound to give 3 phase at any power or voltage with ease using Doug's excellent method. I've wound plenty of radio transformers and chokes but never ever thought I would be winding a transformer so big in my garage that I can't even lift it.
I can say that if the transformer method is chosen then a scrap 3 phase transformer will be needed. Only two legs of the transformer are wound but it is Doug's unique method which gives the 3 phases and it is down to how the coils are connected.
I'm not from an electrical background but I only needed help from Doug on a couple of occasions and Doug was rapid in his replies.
Once the transformer is wound then each individual machine is phase balanced to the transformer using capacitors and this alone is fascinating watching the volts change. Once the machines are balanced then it is just like having standard 3 phase laid on. a single or multiple machines can be run together up to the maximum transformer output and they can be switched on and off at will. It really is good and the money spent on the DVD's was money well spent. My transformer powers both my big Startrite bandsaw and my home made dust extractor and both run on full power at 415V.
I'm waiting for Alan to take the plunge.
Kind regards, Col.
Thanks for asking Joe but in this case it's a matter of buying the DVD's from Doug as the three DVD's run to six hours viewing and I thought well worth the £17 or so I paid for them; they are more interesting to watch than the usual programs on TV these days.
It wouldn't be fair to Doug if I gave all the details but I can say that any transformer can be wound to give 3 phase at any power or voltage with ease using Doug's excellent method. I've wound plenty of radio transformers and chokes but never ever thought I would be winding a transformer so big in my garage that I can't even lift it.
I can say that if the transformer method is chosen then a scrap 3 phase transformer will be needed. Only two legs of the transformer are wound but it is Doug's unique method which gives the 3 phases and it is down to how the coils are connected.
I'm not from an electrical background but I only needed help from Doug on a couple of occasions and Doug was rapid in his replies.
Once the transformer is wound then each individual machine is phase balanced to the transformer using capacitors and this alone is fascinating watching the volts change. Once the machines are balanced then it is just like having standard 3 phase laid on. a single or multiple machines can be run together up to the maximum transformer output and they can be switched on and off at will. It really is good and the money spent on the DVD's was money well spent. My transformer powers both my big Startrite bandsaw and my home made dust extractor and both run on full power at 415V.
I'm waiting for Alan to take the plunge.
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
