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[AMPS] Re: Two XFMRs Parallel...

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Subject: [AMPS] Re: Two XFMRs Parallel...
From: drkirkby@ntlworld.com (David Kirkby)
Date: Thu, 18 Jan 2001 17:48:03 +0000
"J. Bradshaw" wrote:
> 
> Another way to question this:
> 
> How can you be certain the secondaries will be in phase
> with each other?   They most certainly won't be if they
> aren't identically wound (hard to do even when you wind
> on the same core).

That is very interesting and something I for one overlooked. Given you
have reactance in the windings, the phase could well be load dependant.
i.e. whatever phase difference occurs off load, is not the same as on
load. A real nightmare. 

> And what will you do to prevent the fields from interacting
> to buck or boost in close proximity to each other?  

The core would tend to keep the fields inside. I know audio fans buy
transformers with low radiated fields, but I doubt the radiated fields
would be sufficient to cause any adverse effect here (but there are
plenty of things that will). I suspect this would be the least of the
worries. 

-- 
Dr. David Kirkby Ph.D,
email: drkirkby@ntlwold.com (formally davek@medphys.ucl.ac.uk)
web page: http://www.david-kirkby.co.uk       
Amateur radio callsign: G8WRB

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