On Monday, May 28, 2012 12:38:53 PM andy pugh did opine: > On 28 May 2012 17:19, gene heskett <ghesk...@wdtv.com> wrote: > >> This one is definitely 1:1, but I am not at all clear what terminals > >> it has.. http://uk.rs-online.com/web/p/auto-transformers/4368861/ > > > > And both are auto transformers Andy, and will not fix this problem. > > Can you have a 1:1 Autotransformer? > That is a straight piece of wire.
> I can see ways that an autotransformer might solve the problem, > depending on how it was wired. > > Consider 3 x centre tapped windings on a shared core. If the > centre-taps are connected together to make a neutral, then if you > connect the rotary converter to the left-hand-ends, and the infeed > unit to the other, and then connect the centre taps all to > neutral/earth, doesn't that do what is needed? I can imagine a way to do it, but it would require non-symetrical windings and very careful load balancing, bitchy to setup without giving the input side a stray path that would lead to unwanted heat that John would wind up paying the power bill for at 2x, once to supply the power it takes to make that heat, and again to handle the unwanted heats removal by AC or fans. Not at all practical IMO. The true 1/1 isolation transformer will be 97-98% efficient and maintain a safe, uninterrupted earthen ground for the whole system. But lets see what Harbach has to offer and at what price. > I think it is likely that the underlying problem is a filter cap to > earth, which is fed by voltages with no earth reference. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> What one believes to be true either is true or becomes true. -- John Lilly ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users