Electric Motor Control: What are the drawbacks of a VFD (variable-frequency drive)?

Buy the very best variable frequency drives depending on your specific requirements for single or three phase input, ac or dc type, any horsepower from 0.083hp to 3000hp or any current rating. We have VFDs for everyone.
Date: Mon-Apr-23-2018-
No answer yet::

Got an answer? Answer this question and earn real $ [See detail] for it.

Be the first one and save the day. Do you have half of the answer? (even a clue?) you can still share it and someone will improve your answer.

Response
What is 1 + 100

Just Updated::