RE: Static motor 20HP for 3 phase tesla Transformerpower sourcing? more info

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Hi David,

I bought the motor off ebay for $235. It's brand new. It supports 208 wye
230 and 460 delta. It is a big motor and I figure at 100uf/ hp to start the
t3 line that is 2000uf momentary plus the surge of the motor starting up!
Quite a power surge! There after it just sits there and idles. It has a high
power efficieny and a SF of 1.5. I have lots of oil run caps to play with.
As I understand it is better for phasing to oversize the Idler motor. Some
seem to add a second idler across t1,t2,t3 to clean up the phasing and sine
waves. 20 HP calcs to 15kw sans losses. Your Thoughts?

This will power a large 208 wye transformer to DC 24K volts. For Demos, I'm
building >10 KW 3 phase driven by a diesel.

Jim Mora

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Saturday, September 09, 2006 2:21 PM
To: tesla@xxxxxxxxxx
Subject: Re: Static motor 20HP for 3 phase tesla Transformerpower sourcing?

Original poster: David Dean <deano@xxxxxxxxxxxxxxxx>

Hi Jim

Are you wanting to power a three phase transformer from a single phase
source?
Or a motor. 20HP is a pretty large motor.
I do have some experience with phase converters both capacitive (static) and
rotary. I am now using an AC drive to power my lathe and would not go back
to
either of the other methods again.

If it is a motor you want to operate I maybe can help. If it is a
transformer,
I think that may be uncharted territory.
More info would be helpfull.

later
deano
 > Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
 >
 > Hello All,
 >
 > I have a number of large new motor run caps and am consider building
 > a static three phase motor source. I know lots of machine shops do
 > this. Has anyone tried this for three phase Tesla coil sourcing?
 > Inductance and capacitance could get interesting, I would expect, as
 > well as Z angles.
 >
 > Jim Mora