Re: determining transformer characteristics

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

Original poster: "Mark Broker by way of Terry Fritz <twftesla-at-qwest-dot-net>" <broker-at-uwplatt.edu>

Terry,

thanks for posting those links.  I had seen them months ago, but lost their
addresses.  However, I was wondering if there was a way to perform similar
calculations on a non-current limited transformer (PT, MOT, pig)?  
I have a couple transformers I would like to simulate accurately.  I could
measure them, but that would mean buying a Henry meter capable of reading
perhaps 10kH (and it's gotta read the .1uH, too :-).  Of course 
just graduating with a BS and still looking for a job (what a wonderful
economy to graduate into!) means I can easily afford one......  (at least
I'm not terribly discouraged yet)

Thanks,

Mark Broker

7/18/01 2:13:00 PM, Tesla list <tesla-at-pupman-dot-com> wrote:

>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
>>
>>
>
>
>