This is a common situation with a VFD, the motor amplifies the carrier frequency and voila you have noise. Simplest possible solutions include changing the carrier frequency ( usually set in parameters for your drive, just raise it slightly, or sometimes it is possible to minimize the noise by increasing/decreasing the distance from VFD to motor. Best thing to do would be to talk to your electrician about this as there are many variables, you could need a combination of them to reduce the noise. First thing- self adjust the carrier frequency slightly higher to see if it helps (in your drive manual). Note: the noise never goes away it just gets adjusted beyond your hearing limits ( your dog will still complain). Or you could just get a pair of earmuffs (which was our solution, I wasn't about to spend the time to figure it out)
updated by @peterk: 02/13/16 14:00:11