Field Weakening Corner Speed - KEB COMBIVERT F5 Instruction Manual

This parameter provides a better adjustment of the field weakening torque curve.
US. 19
Under certain situations, if the input voltage is sagging too low or the motor has very
Field high slip, it is possible that the voltage limit might be reached. This can be confirmed
weakening
by monitoring ru.42. If ru.42 reaches 100% or more the drive is operating at the
corner speed voltage limit and potentially can cause poor control of the motor.
To prevent this from happening the drive has an adjustable torque curve which
prevents the voltage limit from being reached. The value of this parameter is normally
calculated when the motor data is loaded in the LF parameters. After entering the
data, this value can be fine tuned.
Unit: 1 rpm
Value range: 0..4000
Default setting:
Adjustment values: increment /decrement by steps of 10%
Torque (lbft)
LF.36
1.5xT
rated
T
rated
Advanced Parameters
calculated from motor data
LF.16
Torque Limit
Curve
US.1
Speed
(rpm)
133