Lenze ECSCSxxx - Manual (Page 359)

Function library
Torque (torque control)
Setting of motor control
12
l
359 EDBCSXS064 EN 4.0
12.28.4.6 Field weakening
(
Stop!
The available torque is reduced by the field weakening.
The motor is operated in the field weakening range if
ƒ the output voltage of the controller exceeds the rated motor voltage (C0090).
ƒ The controller is no longer able to increase the output voltage with rising speed due
to the mains voltage or DC−bus voltage.
)
Note!
An optimal machine operation in the field weakening range requires a correct
setting of the field controller and field weakening controller (
^ 157).
Manual field weakening
(
Stop!
If the field is weakened manually (TORQUE−MCTRL.FldWeak
(C7531/6) < 100 %), the drive cannot create the maximum torque.
A manual field weakening is possible via TORQUE−MCTRL.FldWeak (7531/6).
ƒ For a maximum excitation, TORQUE−MCTRL.FldWeak must be triggered with +100 %
(= 16384).
ƒ If TORQUE−MCTRL.FldWeak is not assigned (free), the field weakening automatically
amounts to +100 %.