Re: determining transformer characteristics

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Mark,

Check out these wonderful papers by Tero Ranta:

http://hot-streamer-dot-com/TeslaCoils/OtherPapers/TeroRanta/CurrentLimitedTrans
formers/NSTModel.htm

http://hot-streamer-dot-com/TeslaCoils/OtherPapers/TeroRanta/NSTCapMatching/Reso
nantCapacitorMatch.htm

Cheers,

	Terry

At 10:43 AM 7/18/2001 -0500, you wrote:
>List,
>
>Although my uses for this information is not directly related to Tesla 
>Coils, the information IS directly useful to TCs.
>
>Without the aid of a Henry meter, I would like to determine the inductance 
>for a tightly coupled transformer.  I've run across an excellent paper on 
>the Net that explained how to calculate the inductance of an NST.  This 
>proceedure involved shorting the secondary while mearsuing the primary 
>current.  On a loosly coupled transformer, like an NST, this proceedure 
>works sufficiently well.  On a tightly coupled transformer (PT, pig, high-
>power MOTs), this proceedure won't really work.  Is there a way (without a 
>Henry meter) to find the inductance of a tightly coupled transformer?
>
>Also, can anyone hazard a guestimate as to the coupling coefficient of a 
>500VA, 2:1 toroidal transformer?
>
>Thanks,
>
>Mark Broker
>
>