Hey,
I have a 2,2kW motor that runs @ 50Hz with an MM440 frequency drive. The drive is connected on profibus.
Because of the load, the motor never may reach it's speed setpoint. Can be done with the Torque.
So the motor speed setpoint is 50Hz and the actual speed should be slower. It's a rollerhead that needs to give tension on carpet.
It has nothing todo with my other projects and please don't write that I must work with the speed to create tension instead of a hybrid of speed and torque, it must be done like the bosses want.
So, what I do:
I send a processvalue to PQW274, that is connected to WORD 2 of the drive and I linkt it with 'UPPER TORQUE LIMIT' P1522. The torque can be given on an OP7. Minimum torque is 1,8 Nm and max is 22,13 Nm. It can be red in Read parameter r1526.
So I limitate the torque and use the drive in Vector control.
This question goes to the MM440 specialists:
How would FCC respond to this situation ?
And is it better to work with torque control then limitate the torque ?
It works right now, but I'm wondering if it could be done in an other way too ?
Greetz (regards)
CoMBo
I have a 2,2kW motor that runs @ 50Hz with an MM440 frequency drive. The drive is connected on profibus.
Because of the load, the motor never may reach it's speed setpoint. Can be done with the Torque.
So the motor speed setpoint is 50Hz and the actual speed should be slower. It's a rollerhead that needs to give tension on carpet.
It has nothing todo with my other projects and please don't write that I must work with the speed to create tension instead of a hybrid of speed and torque, it must be done like the bosses want.
So, what I do:
I send a processvalue to PQW274, that is connected to WORD 2 of the drive and I linkt it with 'UPPER TORQUE LIMIT' P1522. The torque can be given on an OP7. Minimum torque is 1,8 Nm and max is 22,13 Nm. It can be red in Read parameter r1526.
So I limitate the torque and use the drive in Vector control.
This question goes to the MM440 specialists:
How would FCC respond to this situation ?
And is it better to work with torque control then limitate the torque ?
It works right now, but I'm wondering if it could be done in an other way too ?
Greetz (regards)
CoMBo