WEG CFW-11 Programming Manual page 127

P0412 – Lr/Rr constant (Rotor time constant – t
Adjustable 0.000 to 9.999 s
Range:
Proprieties: Vector
Access groups 01 PARAMETER GROUPS
via HMI:
Description:
The P0412 setting determines the flux regulator gains (P0175 and P0176).
The value of this parameter interferes in the speed accuracy in the sensorless vector control.
Normally the self-tuning is performed with the motor cold. Depending on the motor, the P0412 value may vary
more or less with the motor temperature. Thus, for the sensorless vector control and normal operation with the
motor warm, P0412 must be adjusted until the speed of the motor with load (measured at the motor shaft with a
tachometer) stays equal to that one indicated on the keypad (HMI) (P0001).
This adjustment must be performed with half the rated speed.
For P0202=4 (vector with encoder), if P0412 is incorrect, the motor will loose torque. Thus, one must adjust P0412
so that at half the rated speed, and with stable load, the motor current (P0003) stays the lowest possible.
In the sensorless vector control mode the P0175 gain, provided by the self-tuning, will be limited in the range:
3.0≤P0175≤8.0.
Motor Power (hp) / (kW)
2 / 1.5
5 / 3.7
10 / 7.5
15 / 11
20 / 15
30 / 22
50 / 37
100 / 75
150 / 110
200 / 150
300 / 220
350 / 250
500 / 375
Note!
When adjusted via the keypad (HMI), this parameter may change automatically the following
parameters: P0175, P0176, P0327 and P0328.
29 Vector Control
94 Self-tuning
Table 11.7 - Typical rotor constant (T
2 (50 Hz/60 Hz)
0.19 / 0.14
0.29 / 0.29
- / 0.38
0.52 / 0.36
0.49 / 0.51
0.70 / 0.55
- / 0.84
1.64 / 1.08
1.33 / 1.74
- / 1.92
- / 2.97
- / -
- / -
)
r
05 SELF-TUNING
or
) values for WEG motors
r
T (s)
r
Number of Poles
4 (50 Hz/60 Hz) 6 (50 Hz/60 Hz)
0.13 / 0.14 0.1 / 0.1
0.18 / 0.12 - / 0.14
0.32 / 0.25 0.21 / 0.15
0.30 / 0.25 0.20 / 0.22
0.27 / 0.29 0.38 / 0.2
0.37 / 0.34 0.35 / 0.37
0.55 / 0.54 0.62 / 0.57
1.32 / 0.69 0.84 / 0.64
1.05 / 1.01 0.71 / 0.67
- / 0.95 - / 0.65
1.96 / 2.97 1.33 / 1.30
1.86 / 1.85 - / 1.53
- / 1.87 - / -
Vector Control
Factory 0.000 s
Setting:
8 (50 Hz/60 Hz)
0.07 / 0.07
0.14 / 0.11
0.13 / 0.14
0.28 / 0.22
0.21 / 0.24
- / 0.38
0.31 / 0.32
0.70 / 0.56
- / 0.67
- / 1.03
- / -
- / -
- / -
11-25
11