RE: TC Secondary Voltage

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Gary.Lau-at-compaq-dot-com>

You're correct - the pri/sec turns ratio is not directly involved.  It's the
ratio of pri to sec capacitance.

The way it's usually estimated is by observing the necessary conservation of
energy between the primary and secondary sides.  The starting energy on the
primary side is in the tank cap and is 0.5 * Cp * Vp^2.  Assuming no losses,
the same energy will appear on the secondary top load capacitance.  Knowing
the secondary capacitance, you can calculate the peak secondary voltage.
But since the primary and secondary are tuned to the same frequency, this
can be reduced to Vs = Vp sqrt(Ls/Lp).  

Note that this represents a theoretical maximum with no losses or arcing.
The actual peak voltage will be significantly less due to losses in the
spark gap and corona and streamer losses.

Gary Lau
MA, USA

 

Original poster: "Michael Rhodes by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<rhodes-at-fnrf.science.cmu.ac.th>

Is there a way to calculate the estimated output voltage
at the top of a TC secondary?  Also, could someone give
an explanation of exactly the mechanism involved in
developing this voltage.  I realize there is some relationship
between the # primary turns to secondary but that it is
not the predominant means of generating the high voltage.

Thanks in advance

   -------------------------------
   Michael Rhodes
   Senior Researcher
   Fast Neutron Research Facility
   Chiang Mai University
   Thailand
   -------------------------------