RE: MOT Voltage Doubler

• To: tesla-at-pupman-dot-com
• Subject: RE: MOT Voltage Doubler
• From: "Gregory R. Hunter" <ghunter-at-enterprise-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Wed, 23 Sep 1998 17:31:07 -0600
• Approved: terryf-at-verinet-dot-com

> The point I was trying to make about the voltage doubler circuit is that if
> it only raises the voltage to 2.8 x RMS, then there's little point in
> including it in a TC power supply.  Consider the case of two identical
> 2200VAC MOTs with their cores shorted together and grounded, their
> secondaries in series, and primaries reverse-phased.  The two MOTs will
> develop 4400VAC as measured across the two HV output terminals.  4400VAC x
> 2.8 = 12320V peak-to-peak.  Now, if we include tho two voltage doublers, we
> get roughly 12320VDC pulsed (2200 x 2.8) + (2200 x 2.8).  If a TC is being
> fired by 12320V, does it matter that much if it's AC or pulsed DC?

But, oops, the AC case is 12kV peak to peak, but the voltage across the
output is only half that at a maximum, or 6 kV.  The doubler
configuration allows you to work the maximum positive voltage against
the maximum negative, whereas the AC configuration gets only to the peak
voltage (1.4 *Erms), albeit with opposite sign each time.

Are you saying that peak-to-peak does not = RMS x 2.8?  You've lost me.

Greg

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