Assuming a 2-pole motor, you would need 100 Hz, which almost any VFD today will do. One issue is the motor may be a low-inductance motor, and may require some inductors between the VFD and motor. I run a 60,000 RPM air bearing spindle from a VFD that will only go up to 400 Hz, so that limits me to 24,000 RPM, but it works. I had to add inductors to each phase wire. But, it works.
Designing a 400 V VFD is not for the beginner. You need to use purpose-designed FET/IGBT gate drivers, and even still, trace inductance and layout issues can cause expensive explosions.
Jon