Re: Calculating Sec. Voltage

• To: tesla-at-pupman-dot-com
• Subject: Re: Calculating Sec. Voltage
• From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
• Date: Mon, 10 Feb 1997 09:06:29 +1200
• Subscriber: MALCOLM-at-directorate.wnp.ac.nz Mon Feb 10 22:06:04 1997

Hi Rod,
          Here is the peak output you expect with no breakout, and k 
set at 1:

> Peak primary cap voltage is around 17-18KV (127000 / 0.707).
> Cap value is 0.187 uF.
> Inductance of sec. not yet measured. (900 turns of 1mm enamel coated Cu 
> wire, winding length 45", sec. diam 12", space wound at 20 turns/inch).
> I made a rough calculation to find the res. freq. of around 87Khz, this 
> too has not been measured...I'm awaiting for my equipment to be returned 
> sometime in the next month or so...

Lsec approx r^2.n^2/(9r+10h) = 58mH
For fr = 87kHz this gives Cs(tot) = 58pF

Putting it together: Vo = 18,000V x SQRT(0.187uF/58pF) = 1MV approx.

In reality, with k set to 0.25 say, you'd probably get around 2/3 of
that.

Malcolm

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