creativepaper
Lifetime Supporting Member
I'm specing out a regen drive for our rewinder system for our papermill.
We have a double drum rewinder (40hp motors) that currently uses a pneumatic brake to create roll tension. The drums are powered by PF700 drives using load share. The brake is regulated via the PLC using the 'master' drive torque (i.e. Setpoint of 80%. Master torque = 80%, current = 90%. Slave torque = 88%, current = 98% (110%load share)).
The idea is to couple a 100hp motor onto the brake shaft and use this as a regen drive instead of the brake pads.
The winder will run for approx 15mins continuously every 30mins at close to full load.
The two 50hp winder drives PF700's are connected to our DC bus (660V). We use a regen bridge to convert this back to AC when the other DC bus drives cannot use it.
Can I use a vanilla 100hp PF700 drive as the regen drive or is there a better alternative?
Parameters to set
88 = Speed regulation - The PLC would vary the regen drives speed to vary the torque on the winder master drive
153 = -800
161 = dynamic brake
361 = precharge enabled
No encoders are to be used.
We have a double drum rewinder (40hp motors) that currently uses a pneumatic brake to create roll tension. The drums are powered by PF700 drives using load share. The brake is regulated via the PLC using the 'master' drive torque (i.e. Setpoint of 80%. Master torque = 80%, current = 90%. Slave torque = 88%, current = 98% (110%load share)).
The idea is to couple a 100hp motor onto the brake shaft and use this as a regen drive instead of the brake pads.
The winder will run for approx 15mins continuously every 30mins at close to full load.
The two 50hp winder drives PF700's are connected to our DC bus (660V). We use a regen bridge to convert this back to AC when the other DC bus drives cannot use it.
Can I use a vanilla 100hp PF700 drive as the regen drive or is there a better alternative?
Parameters to set
88 = Speed regulation - The PLC would vary the regen drives speed to vary the torque on the winder master drive
153 = -800
161 = dynamic brake
361 = precharge enabled
No encoders are to be used.