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Hi Jim,
Suppose inductively ballasted and DC resonant charging are nearly the
same thing, except DC resonant charging puts the reactor on the HV side
and adds diodes to de-Q the charging and provide a 2x voltage boost.
Initially I was wondering why everyone was saying a huge filter cap is
required; perhaps that's just for single-phase applications?
For three-phase DC supplies, no huge filter cap is needed. It's just
xfmr -> diodes -> reactor -> Cpri, and works very smoothly. Here's a
desc of my setup from, wow... 24 years ago:
Message: 2
Date: Tue, 24 Jun 2014 11:09:33 -0700
From: "Jim Mora" <wavetuner@xxxxxxxxx>
To: "'Carl'" <cn8@xxxxxxx>
Cc: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Resonate charging versus brute force.
Message-ID: <43C5625018CE494E8B673D8429B6BE52@JimonVista32>
Content-Type: text/plain; charset="us-ascii"
Thanks Carl and David,
I have all the stuff to make a 12" Pig coil and just made a new rotary more
geared to that supply. I have two giant 50KV 8uf capacitors for exploding
piano wire. Frankly, I find them a little like snake charming a cobra with
no anti-venom to fall back on. When the power is off, I like the HV to
return to a safe zone in a reasonable time without huge power dissipation.
Removing the energy from such caps is dangerous and intimidating to me. And
they have a tendency to assure my neighbors that guy is truly nuts ;-^)
I guess I'll pursue the path of least resistance and expense for now. The
12" form has been in my closet far too long!
I also will pull the Raytheon 3P out of the tank to see how it ticks but put
resonance charging on the back burner for now.
Thanks for helping me prioritize.
Jim Mora