[jjsylvestre]

I'll let @mliben comment on the motor questions.

The motor inductance is relatively low so we're running a high switching frequency (40-60kHz) to maintain reasonable phase current ripple. No output filter is used. Also, our phase busbars are very short so we don't run into the transmission line effects you typically see with fast switching SiC/GaN and phase cables.

We are looking into some advanced modulation schemes and switching topologies to reduce CM bearing current. Also looking into hybrid bearings with ceramic balls. This is definitely an area of active research, but we are trying to get away from a CM input filter as they can be bulky and heavy.

Right now, we are using 1200V SiC MOSFETs.

[brandmeyer]

I dunno man, there is no silver bullet for high dV/dt, and SiC are harsher than most. Low-permeability core material and high switching frequency can help keep an LC filter compact.