[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] Voltage Question



Hi Paul,

I wonder how accurate that really is. The secondary voltage
depends on the magnetic field inside the secondary. One part of the
field comes from the secondary current. If that is the only contribution
to the field the equation you gave would be correct. But also the
field from the primary needs to be added in

Udo


Ed Phillips wrote:
> The 'before streamers' bit is all important of course.

Yes, below breakout the secondary response is linear and
this offers another method of calibration -

Put a small shunt resistor between secondary base and ground
so that a scope can measure the base current.  Say 1 ohm so
that 1 volt on the scope corresponds to 1 amp of base current.

Run the system at a drive level below breakout.

Calculate the top voltage using the effective secondary
inductance Les obtained from JavaTC,

  Vtop = 2 * pi * Fres * Les * base_current

Observe the response of the E-field probe and work
out the calibration factor.  With care this could be
accurate to 5%.

--
Paul Nicholson
--



_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla