Re: [TCML] ARSG question

[Scott Bogard <sdbogard@xxxxxxxxx>]

Hi Ian,
     I have nothing useful to say here except that would be awesome if it
worked!!!  My biggest concern would be the RC receiver, I know dimmer
switches don't work well, and sufficient shielding would surely block the
signal from the remote.  If you have an RC car I would suggest you just try
running it near an active coil in a little Faraday cage and see if it
works, I do also know those motors are designed for speed and not torque,
so your rotor would have to be really light (but with those RPMs you'd have
to be a fool to not want to go propeller style anyway, simplest mechanical
gap construction ever!)  Let us know how it goes, hopefully someone else
will comment!

Scott D Bogard.


On Sun, Sep 1, 2013 at 10:29 PM, AusTesla <austesla@xxxxxxxxxxxxxx> wrote:

> I have a question for the list regarding ARSG operation.  I notice this has
> been talked about just recently in regards to using a 3ph motor with VFD,
> an
> option I am considering as the price of VFDs has fallen considerably and I
> can get a 3ph induction motor, wound for 240V 3ph, cheaply.  I am not too
> keen on using a universal from a power tool because of speed and torque
> stability and issues with overshoot.
>
>
>
> I am in the process of building a large (10" secondary) spark gap coil, and
> because my cap will be significantly STR at 100nF, I am strongly
> considering
> ARSG operation.
>
>
>
> Has anyone tried using a brushless RC motor with an ESC to control the
> asynchronous gap speed?  Of course this also raises the possibility of
> using
> a remote control to change motor speed.  Large versions of these brushless
> motors have considerable torque and are speed stabilised by the ESC.  I
> can't imagine that the load on, say, a 12" rotary platter, would be much
> greater than a large RC helicopter.  I haven't done the maths so I am not
> sure.  The question I have is how susceptible would 2.4GHz spread spectrum
> radio signals be to the coils RF?  The coil I am building will have a
> projected resonant frequency of around 75kHz as calculated by JavaTC.
>
>
>
> Regards,
>
> Ian
>
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