I suggest you purchase a ready made VF drive and examine how they do things. I would think it would not be wise to design your own as they are available quite cheaply these days - it would be hard to compete with mass produced offerings. Nevertheless, infineon had some '51 derivatives with motor control features and international rectifier have many devices and app notes for the high voltage side. I've used a few VF drives and wouldn't even contemplate designing my own - there's lots of gotchas and potential for big bangs! Then trying to get the thing CE. For a 0.75kw VF drive (3 phase) I pay about $300US. It has ramp up/down, serial interface, overtemp protection. You can get some with single phase in/3 phase out as they rectify the incoming mains first then generate the output sine wave (pwm) using IGBTs etc.

If you want precision servo control, then we're talking money!