What is the effect of carrier frequency adjustment on VFD controlled 3~ motor?
interesting article. I had installed a VFD on my apple packing line. The squeal was untolerable. It was an old unit with no carrier frequency adjustment. I'm going to shop eBay for a newer one.
Best prices I have found is Factorymation.com they have also shown great support when needed with a motor that was damaged in shipping.