Power factor vs motor speed

[m sleem]

By using a VSD (variable speed drive), would the changing of motor speed changes the original power factor for the same motor ?

 

[Jraef]

Measured where?

On the LINE side of the VFD, the PF will stay fairly consistent at around .95 or better regardless of what is taking place on the load side.

On the load side it varies with loading, which may or may not be related to speed. But PF on the load side is irrelevant beyond the VFD itself.

 

[Besoeker3]

By using a VSD (variable speed drive), would the changing of motor speed changes the original power factor for the same motor ?

The power factor will change depend on what motor is doing. It could, for example, be pump load.

 

[m sleem]

.... which may or may not be related to speed. But PF on the load side is irrelevant beyond the VFD itself.

From your reply it seems no direct relation between p.f and speed. Thanks.

 

[ptonsparky]

Your drive may be able to display PF. Look in the display parameters
I use it to monitor loading on a grain drag via a 4-20 ma output on the drive to a PLC
The speed of your pump will change the load and consequently the PF.

Load Side.