Torque limiting - Urgent!

[pmblotta]

Hello,
I'm with a problem: I have a 150 [CV] ; 440 V drive. But unfortunaly the available power supply for this is a bit far, and there is to much tension loss during the starting of this equipment (a conveyor belt), higher then our customer would aprove, requiring an huge investment in cables.
The solution would be changing the tension, to medium (13300 V), but, due to maintance logistics, stantandardization, whatever, the motors on the plant can only be of 13300 V for more then 200 CV motors....
The solution now could be changing the motor, but due to the fact that in this kind of equipment the reducer, the hidraulyc / elastic coupling has to be dimensioned to 1,5 the nominal power of the motor (to avoid higher losses in case the belt become stuck for any reason), we would then have to change every thing (wich has already been bought).
We are now to purpose a torque limiting system...but the available ones seems to be not to reliable / available...


I would appreciate any sugestions, mecanical or eletrical.

Thank's!

 

[MintJulep]

CV: Cavalli Vapore (Italian: horsepower), yes?

Inverter drive with soft-start?

 

[maypot]

Hi pmblotta,

The simplest solution is to use a variable speed drive/soft start with your 440 V motor. You will obviously avoid the volt drop issue during starting. Further, yOU might configure the drive for torque/current limiting.
You may wish to contact a supplier of variable speed drive/ soft start and they will easily find a solution for your 440 V application without the ned to upgrade to medium voltage.

Bob