magnify power (was Voltage/Length)
From: John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
Sent: Monday, January 26, 1998 5:38 PM
To: Tesla List
Subject: Re: magnify power (was Voltage/Length)
I think you are missing some things. What other electrical apparatus can
produce over 5 million volts at megawatt powers with an input of a
relatively small voltage? The Tesla coil can do this by using the concepts
in the 1890 patents of Nikola Tesla. These patents have to be carefully
studied to truly grasp the fundamentals of Tesla coil operation. These
patents cover electrical power or energy transfer for both utility loads and
radio. It took until 1943 for Congress to rescind Marconi's radio patents
and reestablish Tesla's patent priority, but it was too late for Tesla to
benefit from this recognition.
Charging a capacitor and discharging it is not the same as Tesla coil
operation and is not patentable.
Magnifying power from energy is a long story but can be briefly
illustrated as follows.
With 100% efficiency
joules = watts dt watts = volts x amps
Note that the voltage is in the power equation .
joules = .5 x C x V^2 If the voltage is a transient this equation can
be used only if the dt is known.
Whenever you see "dt" in an equation you can expect surprises.
1 joule = 1 watt for one second = 1 volt x 1 amp for 1 second
1 joule = 100 watts for 1/100 second = 100 volts x 1 amp for 1/100 second
1 joule = 1 million watts for one microsecond = 1 million volts x 1 amp
for one microsecond
Of course, this is only a wild example. If you really understand the
above you will realize it is obvious that any apparatus that can magnify
power has great possibilities. This is what Tesla meant of the TC when he
said the possibilities were unlimited. At present the largest TC power
magnification has been the Tuve et al coil of 1930 with a magnification of
567 and a sec voltage of 5 million volts. The calculations are shown in the
Tesla Coil Construction Guide.
However, there is a problem. How do you find the power gain of an electrical
apparatus? This is a question that has not been completely answered to
There is a much more to the story. Any comments?
At 04:45 AM 1/25/98 +0000, you wrote:
>From: Jim Monte [SMTP:JDM95003-at-UCONNVM.UCONN.EDU]
>Sent: Saturday, January 24, 1998 10:34 AM
>Subject: Re: magnify power (was Voltage/Length)
>Would you explain this a bit more?
>"The TC can magnify power which makes it unique in the electrical world as
>no other electrical device can do this magic."
>If by "magnify power" you mean receive energy from one source, store
>that energy, and then transfer that energy energy elsewhere at a rate
>higher than it was received, I don't see where this is unique to Tesla
>coils. A Tesla coil stores energy in electric and magnetic fields that
>it received elsewhere (usually some form of HV transformer) and
>transfers the energy elsewhere (as in to a streamer) in bursts.
>Gradually charging a capacitor and then shorting its terminals seems to
>me to be essentially the same concept. Energy is gradually stored then
>quickly transferred during the short. Charging a car battery at a
>relatively low rate and then using the battery to crank over the engine
>while starting is also similar. The energy is stored over a relatively
>long period of time (as chemical energy in this case) and then some of
>this energy is used by the starter at a much higher rate for a
>relatively short time. Am I missing something?