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Re: Pri-Sec Phasing
---------- Forwarded message ----------
Date: Mon, 6 Oct 1997 08:09:57 +1200
From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
To: tesla-at-pupman-dot-com
Subject: Re: Pri-Sec Phasing
Hi Greg,
> From: Greg Leyh <lod-at-pacbell-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Pri-Sec Phasing
>
> Malcolm, Bert, All,
>
> When the pri and sec are physically close to each other, the relative
> polarities of the pri and sec should be aligned, in order to minimize
> the voltage difference between them.
> Given all of the possible 'minus-sign' errors, and the fact that the
> two coils are 90 deg out of phase, should the coils have the same or
> opposite 'handedness' when wound?
> I am no longer completely sure of the correct answer, and would much
> appreciate a confirmation. If possible, a concise explanation of how
> the answer was obtained would be far preferable to anecdotal evidence.
>
>
> Thanks in advance --GL
I will do a test next time I am coiling. I will simply measure the
distance a spark can jump between the top of the primary and a
certain distance up the secondary coil with two primaries wound with
opposite handedness. I haven't found any need to phase them in a
resonant setup. Quite different if k around 0.9 or so.
Malcolm