Re: driving motor and simulation
Find the PSpice models on mfr's web site for something
of appropriate voltage and current rating.
This is not a DC-DC, it's a 3-phase inverter (DC-AC).
You show no rectifier stage however (AC-DC).
You should be able to find 3-phase inverter project
inverter examples on the Web, to crib from. Suggest
you start with TI, ON, Linear Tech, Intersil, IXYS,
Power Integrations (I'm sure there are more) and see
what they've got supporting their controller IC products.
I'f bet that between them you can even find eval board
(buy, or just rip off the schematic and BOM).