Magnatizing Current Of Motor

[fornhamspark]

I recently had some experiance with Eurotherm / Parker 690 VSD drives. To run in Vector control it required a auto tune. But the autotune had to be selected to perform this in stationary mode due to the load. If autotune in stationary mode the drive required the magnatizing current from the manufacturer.
Basically my question, is there a way to calculate this from the name plate if it isn't stamped on the plate?
Manufacturers why do you not put this information on?

 

[edison123]

The no-load current is not stamped in the name-plate (actually it is a good idea and the standards should be revised to include details like no-load current, weight of major components like stator and rotor, bearing details in the nameplate).

All OEM's will have mentioned the no-load current in their test certificates. So, check the TC.

 

[ozmosis]

I don't know much about the SSD690 but I am surprised it does not have the capability within the drive to measure magnetising current.
I would be cautious about taking the motor manufacturers data in case the motor has been re-wound in its lifetime. This, I would expect, could influence the magnetising current the motor manufacturer may state, if they state at all.

 

[fornhamspark]

Thanks for the replies.
Ozmosis i think it does measure the magnetising current, but the drive didn't like autotune in the stationary mode. It wasn't until i put the mag current setpoint in from another drive on an identical motor on the other plant that it would run correctly.