could use some help with finding a circuit that gives me the possibilities to run an elektromotor with different voltage and frequencies.

this is a 3PH elektromotor that should be run in a Y configuration on at

110-115V @ 50 to 60Hz,

220-230V @ 100 to 120Hz,

340-360V @ 150 to 180Hz and as last

460-480V @ 200 to 240Hz

Have thought about using a transformer and a computer with relay for the frequency, but prefer an independent system .

For the first 110-115V @ 50-60Hz, have already a solution, have this heavy transformer that transforms 220-230V to 110-115V, since the electric grid works on 50-60Hz, that already fixed.

But what about the others?

any advice?

kind regards,

Lorcan