It is possible to use a Static Phase converter to convert single phase power
to three phase but I would not suggest you attempt to build it yourself
unless you are VERY well aquainted with AC power and high current supplies.
Since you are asking about the 3 phase to single phase I have to assume you
are not.  If the motor you are attempting to run is a small one, under 1 HP
then you can use the Static converter which is in fact just a bunch of
capacitors and some other components.  If the motor is any amount larger than
1 HP you would need to go to a Rotary converter and these are quite expensive.

I have been working in the cabinet and furniture industry as a field engineer
for over 16 years and all of my experience is in the heavy industrial area
which includes both extensive 3 phase and single phase experience.  There is
one other way to make the conversion and that is to use an AC inverter with
single phase input and 3 phase output.  These can be purchased for anything
from fractional horsepower on up to almost any size you want, again they are
not cheap.  One for a 1 HP motor would cost from around $200.00 up to $700.00
or so depending on how fancy you want to go.  The static converters are
cheaper but still can be in the low 100's.

Hope this helps,
Randy A.

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