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Re: Rogowski coil test
Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
At 01:19 AM 3/13/2002 -0800, you wrote:
>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
>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.
>David L. McKinnon