Below is an example on how to convert single phase supply to 3-phase configuration using idler motor ..
I have doubts whether you can do something similar with 2 transformers ..
r2d2droids,
You can convert 2-phase to 3-phase, or vice-versa, using a Scott transformer. See page 85 of the link below:
. www.pentlandsys.com/download/synchro/ch4.pdf
Of course, you must first generate the 2 phase voltage. Phase A must be 90 degress with respect to phase B of the 2 phase voltages. Depending on the power you need, this may or may not be practical.
Regards,
Kral