Re: Ballast Resistance For Pig Coils (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 27 Oct 2007 10:37:58 -0600
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Ballast Resistance For Pig Coils (fwd)



1/2 Ohm value determined by experiment.  It clips the harsh current peaks.

Dr. Resonance

Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, October 27, 2007 8:55 AM
Subject: Re: Ballast Resistance For Pig Coils (fwd)


> 
> ---------- Forwarded message ----------
> Date: Sat, 27 Oct 2007 08:02:57 -0700 (PDT)
> From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Ballast Resistance For Pig Coils (fwd)
> 
> Wouldn't 150 mH limit you to around 5 amps? I'm having
> problems at 25 amps, but had no problems below that. I
> would like to get to 50 by Halloween. How did you
> determine .5 ohms, math or trial and error?
> 
> thanks
> Adam
> --- Tesla list <tesla@xxxxxxxxxx> wrote:
> 
>> 
>> ---------- Forwarded message ----------
>> Date: Fri, 26 Oct 2007 23:49:11 -0600
>> From: resonance <resonance@xxxxxxxxxxxx>
>> To: Tesla list <tesla@xxxxxxxxxx>
>> Subject: Re: Ballast Resistance For Pig Coils (fwd)
>> 
>> 
>> 
>> Usully 150 mH does a good job.  Sometimes we add a
>> 0.5 Ohm 12 kiloWatt 
>> resistor in series.  Then it is very very smooth
>> with no thumps ever.
>> 
>> Dr. Resonance
>> 
>> Resonance Research Corp.
>> www.resonanceresearch.com
>> 
>> 
>> ----- Original Message ----- 
>> From: "Tesla list" <tesla@xxxxxxxxxx>
>> To: <tesla@xxxxxxxxxx>
>> Sent: Friday, October 26, 2007 9:35 PM
>> Subject: Ballast Resistance For Pig Coils (fwd)
>> 
>> 
>> >
>> > ---------- Forwarded message ----------
>> > Date: Fri, 26 Oct 2007 17:41:37 -0700 (PDT)
>> > From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
>> > To: tesla@xxxxxxxxxx
>> > Subject: Ballast Resistance For Pig Coils
>> >
>> > What size resistance are you folks using inline
>> with
>> > ytour ballast for their pig powered coils to
>> prevent
>> > "thumping"? I decided to tune up my coil this
>> evening
>> > in preparation for Halloween. I recently started
>> using
>> > two slide inductors instead of my welder. This
>> evening
>> > all was running well, as I slowly cranked up the
>> amps.
>> > As I got to around 25 amps, the actuator motor
>> died on
>> > my Powerstat stack. I replaced the fuse, and it
>> blew
>> > again. I decided to set the voltage, then remove
>> the
>> > fuse, to keep from risking damage to the stepper
>> > controller board. As I continued to run, I heard
>> > several hard thumps from my powerstats. I quickly
>> > turned up the breakrate, which solved the problem.
>> > However, I noticed that the line in to the
>> Powerstat
>> > actuator had flashed over to the chasis.
>> Apparently I
>> > am getting some nasty spikes that I hadn't
>> experienced
>> > with the welder.
>> >
>> > I know folks have advocated using resistance in
>> line
>> > with their ballast. Is there a way to calculate
>> what
>> > resistance is effective at certain configurations,
>> or
>> > is it more trial and error?
>> >
>> > The reason I'm concerned is I don't want to blow
>> up my
>> > Powerstat actuator or my VFD.
>> >
>> > I have EMI filters between my incoming power and
>> my
>> > pig/ballast, but maybe I should consider something
>> for
>> > voltage spikes. While a spark gap for 120/240
>> sounds
>> > silly, and hard to set, the 120 volt input to my
>> > actuator jumped 1/8" to the grounded chasis.
>> Without
>> > having access to some kind of power monitor, I
>> > wouldn't know if MOV's would last for years or
>> > seconds.
>> >
>> >
>>
> http://www.hot-streamer.com/adam/bigass_coil/schematic.pdf
>> >
>> > thanks
>> > Adam
>> >
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>> 
>> 
>> 
>> 
>> 
> 
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