RE: 18,000. AMP high energy Cap bank

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Steve Conner" <steve.conner@xxxxxxxxxxx>

>It's also possible to make a homemade Rogowski coil and IC integrator
>circuit. However, then the challenge becomes calibrating the unit.

There's an equation on the Rocoil site that tells you what the sensitivity
of a Rogowski coil will be, you just plug in the wire gauge, number of
turns, etc. So you can get to within 10% without calibrating them at all :)

I have been using home-made Rogowski coils for quite a while now to look at
primary current in my OLTCs. I just wrap some fine magnet wire (left over
from winding secondaries) around a piece of plastic hose and bend it into a
ring. One end of the wire has to be put back down the middle of the hose,
this forms a "back winding" that improves rejection of external magnetic
fields. It also means the coil can be easily taken off the conductor and
used somewhere else.

I just use a passive RC integrator with a time constant of 1/10 the coil's
resonant frequency. The primary current only contains a fairly narrow band
of frequencies so it works fine. For a cap discharge experiment, the IC
integrator might be better.


Steve C.