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Re: Fw: Input frequency (fwd)
---------- Forwarded message ----------
Date: Wed, 5 Aug 1998 11:39:54 +0000
From: steinkamp <steinkamp-at-iee.uni-hannover.de>
To: Tesla List <tesla-at-pupman-dot-com>
Cc: steinkamp-at-iee.uni-hannover.de
Subject: Re: Fw: Input frequency (fwd)
> Date: Tue, 4 Aug 1998 21:36:14 -0600 (MDT)
> To: tesla-at-pupman-dot-com
> Subject: Re: Fw: Input frequency (fwd)
> From: Tesla List <tesla-at-pupman-dot-com>
>
>
> ---------- Forwarded message ----------
> Date: Tue, 4 Aug 1998 17:43:06 +0100
> From: "chris.swinson" <chris.swinson-at-zetnet.co.uk>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Fw: Input frequency (fwd)
>
>
> -----Original Message-----
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
> Date: 04 August 1998 03:07
> Subject: Re: Fw: Input frequency (fwd)
>
>
> >
> >
> >---------- Forwarded message ----------
> >Date: Mon, 03 Aug 1998 10:41:17 -0700
> >From: lod-at-pacbell-dot-net
> >To: Tesla List <tesla-at-pupman-dot-com>
> >Subject: Re: Fw: Input frequency (fwd)
> >
> >chris.swinson wrote:
> >
> >
> >> Say if you had a Neon say, 10Kv at 50ma running on the usual 230V 50Hz
> >> mains. As far as I can gather if you use 230V input but at 100Hz you
> would
> >> actually get 20Kv at 50ma, thus more wattage input. Has anyone tried
> this.
> >> It may stress the Neon transformer but would this work ?
> >
> >Why would you get more voltage out at a higher freq?
> >--
>
> I don't fully understand how electrons act, but if you speed them up twice
> as much, would you not get twice the output voltage ?
>
> I have done calculations on telsa programs and that's what it suggests.
> Well I did many "test" coils my results were somthing like this....
>
> 50Hz 230 V input - 8KV 30ma out
> 100Hz 230V input - 16Kv 30 ma out
>
> Sounds odd but thats how the program calculates it. It must be good , as
> you could in theory charge the capacitor up in half the time. So you could
> have a double the size and still retain the same operating frquency of you
> coil ( maybe ). But you would have a lot more power input to your coil
> ( ? )
>
> I'm not sure but you may have to change the coil to take advantage of the
> extra power availible, but the way I see it you should get twice the power
> at the same frequncy. Humm, May have to do a coil twice the size to make
> use of the extra power input.
>
> Chris.
> >
> >
> >-GL
> >www.lod-dot-org
> >
> >
>
> Hi Chris,
I make some reflections on that theme:
If yu get a transformer at 230 V input voltage and 50 Hz frequencie
there will be a certain density of the induction, say 1 Tesla.
If the frequency changes from 50 Hz to 100 Hz and if the geometry of
the transformer is the same then the density of the induction would
change to the half, to 0.5 Tesla. At the output of this transformer
there will be the same voltage as before the changes because the
induction law says u= -N*F*dB/dt, where N ist the number of windings
and F is the expanse. The factor dB/dt will still be the same because
B is lower, but d/dt will effect double.
Therefore the transformer has at its output the same voltage. What
has changed:
indeed there are some changes:
first, the maximum current is the half because all inductive
impedances grow with the frequencie
second, the maximum power is reached by a load equal to the inner
impedance that ist 1/2 of that before the change what means that the
max. power decreases.
the losses too will increase.
regards
stone
Dr. Wolfram Steinkamp, Akad. Oberrat
Institut fuer Elektrische Energieversorgung
Universitaet Hannover
Fax.: 0511 762 2369
Tel.: 0511 762 2305 (2804)
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