RE: [TCML] Coil V4 fail (additional)

["Phil Tuck" <phil@xxxxxxxxxxx>]

Stephan,

The mH figure is for just the ballast. You need to measure it with a DVM
which will hopefully be accurate enough. 

If your ballast core is very big (size wise) then the DVM may not be
sufficient to excite it and you may have to put a 50hz AC voltage through
it. 

Note: This should be a  LOW voltage, not the mains voltage, else it may well
blow something  if the ballast is adjustable and it is set at too low a
figure initially! It must be at 50Hz though. 

 

Regards

Phil

 

www.hvtesla.com

 

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Teslalabor
Sent: 05 November 2010 16:58
To: Tesla Coil Mailing List
Subject: Re: [TCML] Coil V4 fail (additional)

 

Hi Phil,

 

the last days I have built a new ballast inductor with adjustable air gap. 

Now I am ready to apply Richie Burnetts Resonant charging design to my new
teslacoil. My calculations tell me, the ballast inductor has to be set @
30mH.

 

The question is about setting the 30mH: Do I have to set the 30mH without
the HV - transformers connected (10kV PT's) or with the PT's connected in
series to the inductor? I am not sure about this, because the current, which
flows through the inductor without the PTs connected, is higher than with
the PTs connected. So should I go the normal way and simply put a voltage to
my inductor without the PTs connected and measure U and I and then set the
inductance with L=U/2*pi*50Hz*I ?

 

Stefan

 

----- Original Message -----

From: "Phil Tuck" <phil@xxxxxxxxxxx>

To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>

Sent: Friday, October 22, 2010 10:44 PM

Subject: RE: [TCML] Coil V4 fail (additional)

 

 

> Stephan,

> Copies of the three images are here:  I think you want the first one (I've

> renamed them for some reason)

> 

>  <http://www.hvtesla.com/richie_missing/Image3.png>
http://www.hvtesla.com/richie_missing/Image3.png

> 

>  <http://www.hvtesla.com/richie_missing/Image2.png>
http://www.hvtesla.com/richie_missing/Image2.png

> 

>  <http://www.hvtesla.com/richie_missing/Image1.png>
http://www.hvtesla.com/richie_missing/Image1.png

> 

> These are copies I made and kept for my info. They are Richie's copyright

> image and not in any way connected with myself or my site, (in other words

> I'm  not  claiming credit or trying to pinch his work)

> 

> Phil

> -----Original Message-----

> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf

> Of Teslalabor

> Sent: 22 October 2010 21:58

> To: Tesla Coil Mailing List

> Subject: Re: [TCML] Coil V4 fail (additional)

> 

> Phil,

> thank you, thats quite a very good link to Richies post about the resonant

> charging design!

> I have worked through it, but I can only find the first graph on his web

> site where he takes the 82,5 Hz for the 371 BPS to achive PF of 0,85 in 

> his

> design example. I can not find the second graph mentioned, where he takes

> the "0,64 factor" out? He writes:

> 

> "The graph here...

> 

>  <http://hot-streamer-dot-com/temp/reschrg2.gif>
http://hot-streamer-dot-com/temp/reschrg2.gif

> 

> ...shows what the real power output is as a fraction of the "ballasted VA"

> for different rotary speeds.  Notice that low speeds give almost the full

> "ballasted VA" as real power, but higher speeds give progressively less 

> real

> power for the same ballast setting."

> 

> Stefan

> 

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