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Re: TC Electrostatics (fwd)
Hi all taking part in this,
I have a simple idea that should make
for an alternative approach to discovering whether the damped
sinusoid is the culprit.
> > GL wrote:
> > > "Perhaps I'll learn something in January, when I'm able to run the coil again.
> > > I'll try and see whether flipping the primary phasing changes the polarity of
> > > the charge induced on a test plate."
>
> > I'd like to place a bet on that. Rectification must come from
> > assymetric electrodes.
> > Ed Phillips
>
>
> True, if you believe that rectification is the culprit here. I
> however, do not. Richard Hull's explanation of the damped
> sinusoid's DC component is more likely, IMO. Flipping the primary
> phasing should change the induced polarity if this is correct. So
> far, R. Hull says that it does, and R. Wall says that it does not.
>
> -GL
Assuming a DC supply for the coil, first set coupling to one of the
"magic" values of k and a reasonably high one to boot e.g. 0.15. The
terminal should peak (assuming no breakout prior to the bulk of
energy transfer) at some polarity depending on winding sense and
induced secondary current. Measure the DC.
Now couple the coil to the next magic value of k (0.18). The
terminal should peak with the opposite polarity to the previous case
1/2 a cycle earlier. Once again measure the DC and compare. To get
the desired measurement k should be set fairly accurately. This
assumes primary loss to be reasonably low.
Useful?
Malcolm