WEG CFW700, Programming And Troubleshooting Manual

Page: 102 / 223

11
Vector Control
11-24 | CFW700
P0413 – T
m
Constant (Mechanical Time Constant)
Adjustable
Range:
0.00 to 99.99 s
Factory
Setting:
0.00 s
Properties: Vector
Access groups
via HMI:
MOTOR
Description:
The P0413 setting determines the speed regulator gains (P0161 and P0162).
When P0408=1 or 2, it must be observed:
„
If P0413=0, the time constant T
m
will be obtained in function of the inertia of the programmed motor (table
value).
„
If P0413>0, the value of P0413 will not be changed by the self-tuning.
Sensorless vector control (P0202=4):
„
When the P0413 value obtained through the self-tuning provides inadequate speed regulator gains (P0161
and P0162), it is possible to change them by setting P0413 via keypad (HMI).
„
The P0161 gain provided by the self-tuning or through P0413 change, will be limited to the range: 6.0 ≤
P0161 ≤ 9.0.
„
The P0162 value varies in function of the P0161 value.
„
In case it be necessary to increase even more these gains, they must be adjusted directly at P0161 and
P0162.
Note: Values of P0161>12.0 may turn the torque current (I
q
) and the motor speed unstable (oscillating).
Vector control with encoder (P0202=5):
„
The P0413 value is estimated by the self-tuning when P0408=3 or 4.
„
The measurement procedure consists in accelerating the motor up to 50 % of the rated speed, applying a
current step equal to the motor rated current.
„
In case that it is not possible to submit the load to this type of request, adjust P0413 via keypad (HMI), refer
to
item 11.8.1 - Speed Regulator .