Re: [TCML] tripolar coil

[David Thomson <tcbuilder@xxxxxxxxxxxxxxxxxxxxxxxx>]

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.

Dave


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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