RE: [TCML] JavaTC PF cap calculation XL,XC,Z

["Jim Mora" <wavetuner@xxxxxxxxx>]

Thanks Deano,

Thanks for the comprehensive write up. It is quickly evident that I will
have to "spin" the meter dial as I am using a 5kva PT, satuarable reactor as
a ballast, and a ASRSG.

Don't laugh but I still do impedance on a slide rule fairly fast;-) A PC
Java impedance calculator is a luxury!
Jim

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of David Dean
Sent: Sunday, December 07, 2008 7:06 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] JavaTC PF cap calculation XL,XC,Z

Hi

On Sunday 07 December 2008 07:49:13 pm Jim Mora wrote:
> Hello List,
>
>
>
> I asked a similar question of JavaTC before but should the PF capacitance
> be calculated with the transformer top KVA and top voltage rating
> regardless of ballast inductance and over- volting  and over currenting or
> will it be a variable?

It will be a variable. If you are using a polemount distribution transformer
or 
a potential transformer, the transformer itself has little to do with PFC.
The 
turns ratio is the most important parameter, the internal resistance and 
inductance will be rather insignificant and can be ignored. The relationship

between the reflected impedance of the ballast and the tank cap are what you

need to look at.

See my page at:
http://deanostoybox.com/pfc.html

for a little bit about how it works. You could probably get close to the
correct 
PFC value by calculation if you are going to have a constant breakrate. If
the 
breakrate varies, however, the PFC value will change with the breakrate. If
the 
ballast is variable, the PFC value will change with the ballast. 

Unfortunately, I do not know of any method to know for sure what PFC value,
if 
any, will be optimal for any particular setup except for trial and error.

> I'm on the edge of my power source delivery and 
> would like to get an accurate PF correction value. The transformer does
not
> spec its impedance. It seems to me the ballast impedance would affect the
> value and the capacitance would likewise affect the ballast phasing.
>
>
>
> Thanks,
>
> Jim Mora
>
later
deano


_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla