Lenze ECSCSxxx User Manual
Page 339
Function library
Speed (speed control)
Setting of motor control
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339
EDBCSXS064 EN 4.0
12.27.3.8
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 (SPEED−MCTRL.FldWeak (C7431/6) < 100 %),
the drive cannot create the maximum torque.
A manual field weakening is possible via SPEED−MCTRL.FldWeak (7431/6).
ƒ
For a maximum excitation, SPEED−MCTRL.FldWeak must be triggered with +100 %
(= 16384).
ƒ
If SPEED−MCTRL.FldWeak is not assigned (free), the field weakening automatically
amounts to +100 %.