InstaSPIN-FOC technology with 6.9 kW motor

Bert,

Yes, it is very much possible. The software doesn't care about the power level. You just need to build sense circuitry with HW that scales everything to 0-3.3V on the ADC pins. Then set the scaling values in the user.h file used in the MotorWare project.  Unfortunately our high voltage kit TMDSHVMTRINSPIN only goes up to 350V/10A.  You could do quite a bit of testing with it, but not full load, full power.

We do have some 3P who are making HW that could be used for this motor, but they are still development boards, they aren't off the shelf drivers.

For an off the shelf product there is the CoMoCo inverter, but I believe it slightly less current than you require.