Stephan et al
As I understand because of power factor issues, unless you have a true
power
meter, it means the readings are always low. I #think# a moving iron meter
reads correct, not sure though. On mine I just read the variacs input
current with a moving coil meter but that always reads low compared to his
PSpice file for a simulation. I base all my power estimates on what PSpice
gives me. The current drawn by a shorted transformer with just the ballast
to limit the current is always different when you add in the tank circuit
if
you have a SRSG.
This all assumes you have followed his method and allowed what he calls
his
'ballast correction factor' .
The charging method only really laying down the foundations of the coil.
The actual performance being dependant on lots of other things, but you
say
that part is good.
Estimating the power and actually measuring are a thing I've long meant to
look into more. I wonder on the suitability of current transformers for
this
matter - anyone?
Regards
Phil
www.hvtesla.com
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Teslalabor
Sent: 21 December 2010 14:01
To: Tesla Coil Mailing List
Subject: Re: [TCML] 3000W Halogen Dummy Load WAS: Coil V4 fail
(additional)
Hi Phil,
today I tested the coil. It seems to run good but the power is much to
less
and not what I calculated.
I was going for 5kW real power using Burnett's resonant charging design
method. So the current on the primary side (variac at full power) should
be
arround 25A. But when running the coil only 15A are flowing.
When connecting only the ballast inductor (31mH) to the variac, 25A are
flowing.
So why are only 15A when running the teslacoil?
Stefan
----- Original Message -----
From: "Phil Tuck" <phil@xxxxxxxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Wednesday, November 24, 2010 10:55 AM
Subject: RE: [TCML] 3000W Halogen Dummy Load WAS: Coil V4 fail
(additional)
It is a vast improvement over the previous arrangement, it will be
interesting to see how the coil performs.
Regards
Phil
www.hvtesla.com
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf
Of Teslalabor
Sent: 21 November 2010 12:11
To: Tesla Coil Mailing List
Subject: [TCML] 3000W Halogen Dummy Load WAS: Coil V4 fail (additional)
Hi Phil, others,
before I will do a full scale test with secondary in place, I performed a
test with a big 3000W dummy load in place of the primary. The dummy load
consists of 6 halogen bulbs each 230V / 500W connected in series. I made
a
video of the dummy test:
http://www.youtube.com/watch?v=pp3M2KNXbrs
The system seems to run very smooth, Richie's resonant charging design
works
pretty well. Compare it to an earlier video, where I used much to high
primary capacitance (240nF) and other bad parameters and got terifying
glowing electrodes:
http://www.youtube.com/watch?v=O84SI50g0NY
as you can see I also did some changes @ the SRSG but the electrode
diameter
is the same (4mm tungsten).
Will tell you the results (+ video) when testing with secondary in place.
Best Regards
Stefan
----- Original Message -----
From: "Phil Tuck" <phil@xxxxxxxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Saturday, November 06, 2010 8:09 PM
Subject: RE: [TCML] Coil V4 fail (additional)
Stephan,
Your specs are similar to mine.
I compared a recent video where I have resonant capacitor (101nF) cap
against an earlier run with the same ballast setting (20 mH) but where
it
was just below the resonant value with a 72nF capacitor.
You can see the difference between the two. (Both are 200bps SRSG with a
Freau controller)
How much is down to making the system being resonant @ 200bps and just
how
much is just down to a larger cap, it is hard to say of course.
My earlier 72nF setup was almost resonant:
http://www.youtube.com/watch?v=dZc9mUOJh9Y
The latest 101nF setup is resonant (@ 200bps on 50Hz ):
http://www.youtube.com/watch?v=DBG_0Xv7J3s
Phil
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf
Of Teslalabor
Sent: 06 November 2010 14:57
To: Tesla Coil Mailing List
Subject: Re: [TCML] Coil V4 fail (additional)
Phil,
okay thanks a lot. Will post the results + video of the coil running.
Just
have to put the parts together. By the way, the specs of the tank
circuit
are (resulting from the resonant charging design procedure):
Input: 0-240V fed via variac
Power coil will process: 5kW
200bps SRSG
Primary Voltage: 10kV from PT's
heavy adjustable air gapped inductor 20mH ( if "I" part of core
completely
removed) ... >100mH; no saturation effects), adjusted to 30,8mH 98nF
Tank
Cap (commercial 25kV BOSCH pulse cap) - REMEMBER, I first used 240nF and
got
badly glowing electrodes @ my SRSG!
It's the first system I designed this way - all my earlier systems I did
the
way "take some parts and see what happens". So I am absolutely longing
what
performance this system will have.
Best Regards
Stefan
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