VFD, Motor, Vibration

[Sujj33]

Hello, I have VFD and 2 motors One of them is manufactured by WAT and other by VOLT, both of them are made in Turkey. In first case when I connect VOLT motor it works good on 10-100HZ range, in second when I connect WAT motor it start vibrating at 40HZ. I tried to connect WAT motor with another VFD and it worked without vibration. What can i do to get proper work of motor.

 

[waross]

Try setting the VFD switching frequency to a different frequency.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

 

[jraef]

Details matter...
If the VFD is set up for SVC (Sensorless Vector Control), it must be tuned to the specific motor it is connected to, typically done with a parameter called "AutoTune" or in some cases, "ID Run", something like that. Without being tuned, or if the tuning was done for a different motor, erratic behavior is not unexpected.


" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

 

[electricpete]

You have good responses above. Just to look at another piece:

I tried to connect WAT motor with another VFD and...

Did that reconnection of the WAT motor to another vfd involve moving the motor (changing it's mounting and potentially its resonance characteristics)