Re: OLTC update

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
> 
> Hi All,
> 
> I ran various MicroSim models with K going from 0.05 to 0.25 with primary
> resistances of 0.5, 1.5, and 2.5 mOhms.  I found the resulting peak
> secondary voltages:
> 
>         http://hot-streamer-dot-com/temp/OLTC08-28-01.gif
> 
>         http://hot-streamer-dot-com/temp/OLTC08-28-02.gif
> 
> I think the dip in the yellow line at 13 is a mistake in my data.  In the
> low loss (r=0.0005) case you can see the effect of sweet spots above k=0.20.

The results seem strange. Increasing the coupling should always reduce
the loss, increasing the maximum secondary voltage. The sweet spots
don't
make great difference at these levels of coupling. The large increase
observed for low coupling is very strange. Are you sure that
you are measuring the output voltage with both polarities?

Antonio Carlos M. de Queiroz