154
10.1 Elevator Drive Data
These parameters provide access to advance elevator drive
parameters related to the motor model, system mechanical model,
and advanced control settings. These values should only be
changed when instructed to do so by the manufacturer.
Sets the rate of decay of the motor  ux above the corner speed
adjusted in Ld.18. This parameter is only available for induction
motors.
Ld.18
Field weakening
corner
Ld.19
Field weakening
curve
This parameter provides a better adjustment of the  eld weakening
torque curve. Under certain situations, if the input voltage is sagging
too low or the motor has very high slip, it is possible that the voltage
limit might be reached. This can be con rmed by monitoring ru.42.
If ru.42 reaches 100% or more the drive is operating at the 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  ne tuned.
Unit: 1 rpm
Value range: 0..4000
Default setting: calculated from motor data
Adjustment values: increment /decrement by steps of 10%
1.5xT
rated
T
rated
LF.16 Ld.18 Ld.19
Speed
(rpm)
Torque (lbft)
LF.36
Torque Limit
Curve
Advanced Drive Data
IM
PM
For PM motors this parameter is not required and therefore is
not visible.
IM
PM
For PM motors this parameter is not required and therefore is
not visible.
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