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Re: [TCML] tripolar coil

There certainly will be challenges, but the idea is to explore new ways of
manifesting streamers.  I'm not sure what the limits of the controller are,
yet.  But I do know that my immediate requirement is only for tens to a few
hundred Hertz.

Another potential application is for driving BLDC motors at programmable
speeds to explore the effects on the spark gap break rate.


On Mon, Feb 18, 2013 at 3:05 PM, Jim Lux <jimlux@xxxxxxxxxxxxx> wrote:

> On 2/18/13 12:43 PM, David Thomson wrote:
>> I found a really neat digital three phase controller kit online.  There
>> are
>> at least two companies who provide these.  There is a difference in the
>> way
>> the PWM is implemented.
>> http://www.freescale.com/**webapp/sps/site/overview.jsp?**
>> code=WBT_MOTORPWMTUT_WP<http://www.freescale.com/webapp/sps/site/overview.jsp?code=WBT_MOTORPWMTUT_WP>
>> One is based on the beginning of the signal and the other is based on the
>> center of the signal.  Sine wave applications would likely do better with
>> the center-based signal.  I would imagine a tripolar TC would do better
>> with pulse signaling at perhaps 10% duty cycle.
>> Since my present project requires sine waves, I'm using the Freescale kit
>> at:
>> http://www.freescale.com/**webapp/sps/site/prod_summary.**
>> jsp?code=3PHASELV-KIT<http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=3PHASELV-KIT>
>> Texas Instruments also has a kit:
>> http://www.ti.com/tool/**drv8312-c2-kit<http://www.ti.com/tool/drv8312-c2-kit>
>> Both of the above kits comes with a USB controller, and software.  The
>> Freescale kit also includes a BLDC motor and everything is preinstalled.
>> I envision this controller kit being able to control solid state relays.
> Of course, these things are for frequencies down in the tens/hundreds of
> Hz range.. as opposed to 100-300 kHz..
> consider a small demo with 3-6 coils, each a NST sized (say a 4" diameter
> secondary and 0.015 uF primary L).. the fRes is going to be 200-300 kHz.
> (as opposed to running 3 coils off 60 Hz three phase, so the "bangs" are
> distributed among the three coils in sequence.. which might also be
> interesting to watch)
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