RE: [TCML] Low Frequency AC

["Jim Mora" <wavetuner@xxxxxxxxx>]

Hey Ed,
I was going to post the fact that the iron would have to be big. Have I just
learned that the freq is proportional to the voltage in sizing as in this
case of 4X? What happens when we say double the frequency?
Jim Mora


-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Ed Phillips
Sent: Tuesday, June 16, 2009 5:37 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Low Frequency AC

    You're overlooking very one important thing.  However you generate 
the 15 Hz power you also need a stepup transformer with enough iron in 
the core to support 6 kV @ 15 Hz.  That's the equivalent of 24 kV at 60 
Hz so an ordinary NST won't hack it.  I gather you're really looking for 
something like a sine wave outfit.  Less iron needed to transform 15 Hz 
bipolar pulses of short duration.

Ed

"Frank wrote:

> Hi all,
> I have a really strange question that is not really Tesla related but 
> will all the HV expertise out there, someone might have a suggestion.
>
> I need a high voltage, say around 6KV @ 30 ma +- AC source at 15 hz.
>
> I was thinking of rectifying the AC to 110, no filters, and then 
> building a mechanical chopper to drive a NST, kind of like an old 
> vibrator car tube radio circuit.



Another approach is one of those 12V inverter circuits using 2n3055s (or 
something more modern).. easy to adjust the frequency

OR.. find a variable speed AC motor controller. "

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