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Re: Capacitor C/Peek
At 04:59 AM 10/25/96 +0000, you wrote:
>From rwstephens-at-ptbo.igs-dot-netThu Oct 24 22:57:34 1996
>Date: Fri, 25 Oct 1996 00:37:12 -0500
>From: "Robert W. Stephens" <rwstephens-at-ptbo.igs-dot-net>
>To: tesla-at-pupman-dot-com
>Subject: Re: Capacitor C/Peek
>
>>>From pierson-at-msd26.enet.dec-dot-comWed Oct 23 22:20:11 1996
>>Date: Wed, 23 Oct 96 20:54:06 EDT
>>From: pierson-at-msd26.enet.dec-dot-com
>>To: mail11: ;
>>Cc: pierson-at-msd26.enet.dec-dot-com
>>Subject: Capacitor C/Peek
>
>
>>I was pondering something exceedingly basic, and getting phunny numbers.
>>Specifically, what energy is in the cap in the primary tank?
>
>>I keep getting a number which seems small, someone check my math:
>
>
>> Joules == watt-seconds == (C(Ve2))/2
>
>>right?
>
>> C= 0.025 uFd (for the CP caps, just to pick a number...
>> V=10,000 V (to pick another)
>
>>Rolling this together:
>> ((2.5)*(10e-8)*(10e4)e2))/2= 1.25 Joules
>
>>Izzat right?
>>I was expecting a larger number....
>>Am i dropping a decimal somewhere???
>
><snip>
>
>> regards
>> dwp
>
>dwp,
>
>Your math is fine. However, if that 10 kV was transformer RMS you
>can redo your calculation to the peak (X 1.414) value as this is what
>it could charge your cap to if allowed to by the gap. With this view you
>get 2.5 Joules. If you can 'pop' your 2.5 Joules in one half
>squarewave at 100 kHz (5 microseconds), your reward is a 500 kW pulse. : )
>Create a nice half sinewave instead and you get a _peak_ power of
>1.414 x RMS or a 707 kilowatt pulse.
>
>Now take a 12000 volt RMS xfmer and charge a 0.125 mfd cap to 16968
>volts. That's 17.99 Joules. Bang this in 5 microseconds and your
>sinewave peak power is 5.088 megawatts! That's approximately the
>spec of R. Hull's Nemesis coil and exactly those of my MTC system. My
>first half sinewave is 6.25 microseconds though (80 kHz), so my theoretical
>peak power is lower at merely 4.07 megawatts, and then taking K=0.2 and gap
>losses into account I'm down to maybe 15% of that (a measely 610 kilowatts)
>out the top?
>
>I realize that the above is fast and simplified 'figurin' which
>ignores a lotta stuff so flames are welcomed if I'm out more than 10 db. : )
>
>rwstephens
>
Sorry guys -
You are at over unity energy again. The true answer is 1.25 joules. You
cannot magnify energy like you can power, voltage, current, etc., etc.
Jack C.