Re: Rogowski coil test

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Original poster: "Richard Wayne Wall by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwall-at-ix-dot-netcom-dot-com>

Terry,

Richard Hull did a lot with Rogo coils with his old water arc experiments. 
I bet if you contact him off line he would share some info with you.

Rick

>
> 
> Hi Dave,
> 
> At 01:19 AM 3/13/2002 -0800, you wrote:
> >Terry,
> >
> >Sounds good on your testing.  I just graduated so hopefully before long
I'll
> >be able to make some and play with them.  I have a few questions on the
ones
> >you used.
> >
> >What burden did you use for them?  
> 
> As "I" understand them, they are not supposed to have a burden resistor
> like a normal CT does.  They are just a high impedance voltage output. 
the
> coil was just across a 1Meg ohm 1:1 scope probe.
> 
> >Do you have a graph of the frequency
> >response of them?  
> 
> I didn't make a V vs. F graph.  I notice that some Internet ones seem to
> have a fairly good response.
> 
> >What turns ratio are they?  
> 
> I "guess" the depend more on mutual inductance than turns ratio.
> 
> >Their frequency response
> >should be very linear since they don't have a core.
> 
> Amplitude response is supposed to be near perfect.  I guess the inductance
> and capacitance of the coil is what messes with the frequency response.
> They seem simple but I think there is far more to them.  I just quickly
> made mine to play with without much heavy duty thought behind it.  I'll
try
> to search the net for more design info behind them.
> 
> Cheers,
> 
>