Re: srsg + mots - happy couple :-)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Paul Benham" <paulb@xxxxxxxxxxxxxxxxxxxx>



> Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>
>
> Hello Paul.
>
>  > Original poster: "Paul Benham" <paulb@xxxxxxxxxxxxxxxxxxxx>
>
>  > I have measured a few mot's before and after shunt removal.  I found
that
>  > the output impedance was around 2k with the shunts and around 600R
without.
>
> for my mots (Rpri=2r, Rsec=115r ) 2k it`s about 5.4H, that means the
> coupling is 0.98 - the same as i  measured, ok then :-)
> and 600r means that coupling has increased to 0.997 - ha, THAT is a
> "real" tranny, even too much  (for such geometry i guess), so probably
> our mots are not so equal :-D

The figures I gave were from memory.  I rarely see two MOT's the same and I
have collected quite a few.

>
>  > As a result I run with the shunts removed on mine.
>
> the question is - what benefit would we have from this (if any)?
> coz in my case i need about 40H when the coupling is 0.999 - i`m just
> too lazy for this :-)

I removed them to get more power and longer sparks :-)

>
>  > MOT's are not the most efficient beasts but they still pack a punch.
The
>  > best I have achieved is 81" from two MOT's as a power supply.
>
> it`s not a problem to get 81" - the problem is how long your tc
> would be working, before the mot`ll  melt down ;-) i`m building
> _continuous_ duty psu.

Okay.  I guess they would not last long if I was running 100% duty cycle.  I
run for a couple of minutes at a time maximum.

Cheers,

Paul.