GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 336)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
6
208
provisions
In order to make the commissioning procedure easier and uniform, the system contains a clause referring to the
speed and torque directions to be respected:
As a general rule the winder speed and the torque direction are considered positive with a upper winding side.
All the possible system configurations stated in the examples below refer to this clause.
n
ote
! The polarity of the line speed reference is not important, because the system states the output
reference polarity only according to the parameters Wind/unwind and Winder side.
1. Drive used as a winder – winding side = up
M
W[+]
DRIVE
R
Line speed
T[+]
M
Nip roll Winder
Winder side = Up
Wind/unwind = Winder
Figure 6.17.13: Drive used as a winder – winding side = up
If the speed demand function is used, the system creates a positive speed reference; it is therefore necessary to
connect the motor so that, with this polarity, the coil winds the material starting from the upper side. The wind-
ing torque is positive.