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Re: one turn heating
Subject: Re: one turn heating
Date: Thu, 05 Jun 1997 21:46:39 +1000
From: Peter Electric <elekessy-at-macquarie.matra-dot-com.au>
To: Tesla List <tesla-at-pupman-dot-com>
References:
1
Tesla List wrote:
>
> Subject: one turn heating
> Date: Tue, 3 Jun 97 08:38:40 EDT
> From: pierson-at-gone.ENET.dec-dot-com
>
> >> I suddenly saw some wisps of smoke or something coming from the
> >> secondary. I shut it right down and found that 23" up from the
> >>bottom, a turn or more (#15 wire) had gotten hot enough to bubble
> >>the Behr Super Build 50 over coating and had really gotten it to
> >>smoke.
>
> >I don't have any idea why one turn or section of the secondary would
> >get real hot unless it is from overcoupling or not being right on tune.
> Utter speculations follows
>
How about some more speculation. As I understand it, normal TC
secondary will act like a 1/4 wave aerial - it will have a very high V,
low I at the top and the reverse at the bottom, a very high I and a very
low V.
If you overdrive the coil, splitting occurs which will cause the
secondary to resonate at double the frequency and the very high I
appears somewhere near the middle, possibly causing it to overheat?
Unfortunately, my single 60Ma Neon Xformer doesn't cause anything to
overheat!
Cheers,
Peter E.