Re: Theoretically, Cltr/Cres = pi/2/Typo errors?

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

Original poster: "harvey norris by way of Terry Fritz <twftesla-at-qwest-dot-net>" <harvich-at-yahoo-dot-com>


--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Ed Phillips by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>
> 
> Tesla list wrote:
> > 
> > Original poster: "Peter Lawrence by way of Terry
> Fritz
> <twftesla-at-qwest-dot-net>" <Peter.Lawrence-at-Sun-dot-com>
> > 
> > does anyone believe "L-sec" and "k" are
> "independent of manufacturer"
> > so that tables can be published for typical NSTs
> >         6-30
> >         7.5-30
> >         9-30,  9-60
> >         12-30, 12-60
> >         15-30, 15-60
> > 
> > the curious duffer,
> > -Peter Lawrence.
> 
> 	IF the open circuit voltage and short circuit
> current equal to the
> ratings, the leakage inductance referred to the
> secondaries will be very
> close to the same.  The leakage REACTANCE will be
> the open circuit
> voltage divided by the short circuit current IN
> AMPS.  For a 60 cycle
> transformer the inductance will be the
> reactance/377.  So, here's what
> the results would be:
Is one to divide by 377 or as below where 3677 is
used?
The 377 (ohms?)sounds familiar, isnt this the
permeance of free space or something like that? I also
assume the repetition of the 12000 no to be in error.
Can a comment be made as to why one divides by this
no, and whether it is supposed to be 3677 or
377?Thanks for any info or clarification here. HDN
> 
>   "6-30"   X=6000/0.03 = 200,000 ohms  
> L=200,000/3677 = 530 henries
 I Must be  asking an irrevalent question , doing the
math I see that 377 is the no actually used. Can one
indicate why one divides by this no? 
> "7.5-30"   X=7500/0.03 = 250,000 ohms  
> L=250,000/3677 = 663 henries
> 
>   "9-30"   X=9000/0.03 = 200,000 ohms  
> L=200,000/3677 = 530 henries
> 
>   "9-60"   X=9000/0.06 = 150,000 ohms  
> L=150,000/3677 = 398 henries
> 
>  "12-30"   X=12000/0.03 = 400,000 ohms  
> L=400,000/3677 = 1061 henries
> 
>  "12-60"   X=12000/0.06 = 200,000 ohms  
> L=200,000/3677 = 530 henries
> 
>  "15-30"   X=12000/0.03 = 500,000 ohms  
> L=500,000/3677 = 1326 henries
> 
>  "16-60"   X=12000/0.06 = 200,000 ohms  
> L=200,000/3677 = 530 henries
> 
> In reality, the core properties and effects of flux
> density may differ,
> resulting in some difference in the inductance,
> which is only an
> approximation at best.  "Plenty good enough for
> government work".
> 
> 	I don't think the concept of coupling factor (k) is
> of much value here.
> 
> Ed
> 
> 
> 


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