Re: 2 questions on resonance (fwd)

To: tesla-at-pupman-dot-com
Subject: Re: 2 questions on resonance (fwd)
From: Tesla List <mod1-at-pupman-dot-com>
Date: Fri, 16 Apr 1999 21:16:32 -0600 (MDT)
Approved: mod1-at-pupman-dot-com


---------- Forwarded message ----------
Date: Fri, 16 Apr 1999 18:45:46 +0000
From: "John H. Couture" <COUTUREJH-at-worldnet.att-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: 2 questions on resonance


  Mark -

  A Tesla coil can magnify power (watts) but not energy (joules). The energy
in a capacitor can be released in one second or in a fraction of a second.
If the energy is released in one second you are correct in that there is no
power magnification. If the energy is released in less than a second there
is a magnification of the power.

  Power = joules/seconds = energy/dt

  The trick is to determine the fraction of a second (dt) that is involved
with Tesla coils. Note that this gets complicated because it involves
energy, efficiencies, secondary voltage, Q factors, log decrements, and
other parameters. This is one of the many difficulties that arises when
developing a comprehensive Tesla coil computer program. As there are no
theoretical equations to help only empirical data from real coils can be used.  

  John Couture

-----------------------------

At 10:35 AM 4/11/99 -0600, you wrote:
>Original Poster: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au> 
>
>At 10:55 PM 09/04/99 -0600, John Couture wrote:
>
>>  Malcolm -
>>
>>  What do you mean by power? Note that if the NST is powering a Tesla coil
>>it is possible to magnify the input power by hundreds of times. The
>>magnification can be done even without resonant charging. Refer to past posts.
>
>Now I'm only a simple medico, so please take this slowly ......
>
>How do you get more energy out per unit time than you put in ???
>
>I appreciate we store energy in the primary cap and release this over a 
>much shorter time interval, however in terms of power calculations should 
>we not be averaging this over time to give J/s, and I still can't see how 
>J/s out can be > J/s in over time.
>
>mark
>
>
>__________________________________________________________________
>Mark Finnis					Hm:  61 8 8289 5205
>Consultant, Intensive Care Unit			Wk:  61 8 8222 5042
>Royal Adelaide Hospital				Fax: 61 8 8223 6340
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>http://www.health.adelaide.edu.au/icu/
>__________________________________________________________________