Hey,

Peter, could you elaborate on the possible solutions youre proposing? I am unfamiliar with those terms and how to proceed.

As for the second option, just move the grindeur further from the control panel?

Can you send a quick video? 

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

The noise originates from the motor area. I've done a belt change, oil check, and greased any parts that seem relevant. The noise does not happen when you simply spin the drum. 

Logan

What is making the whine? The motor or the phase converter?

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@DiscoverChoc

Hey,

Have a used ECGC 65A Ive recently hooked up with single to 3 phase control box. It makes a high pitched whine when the motor is turned on, and the pitch changes with the frequency control knob. It is very annoying. I am in contact with an electrician and Cocoatown, but was wondering if anyone had any advice or experience with fixing this. Thanks.

updated by @logan-byrd: 04/11/25 09:27:36