Vector Control
11
CFW700 | 11-23
P0412 – Lr/Rr Constant (Rotor Time Constant – T
r
)
Adjustable
Range:
0.000 to 9.999 s
Factory
Setting:
0.000 s
Properties:
Vector
Access groups
via HMI:
MOTOR
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=5 (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.
Table 11.6:
Typical rotor constant (T
r
) values for WEG motors
Motor Power
(hp) / (kW)
T
r
(s)
Number of Poles
2 (50 Hz/60 Hz)
4 (50 Hz/60 Hz)
6 (50 Hz/60 Hz)
8 (50 Hz/60 Hz)
2 / 1.5
0.19 / 0.14
0.13 / 0.14
0.1 / 0.1
0.07 / 0.07
5 / 3.7
0.29 / 0.29
0.18 / 0.12
- / 0.14
0.14 / 0.11
10 / 7.5
- / 0.38
0.32 / 0.25
0.21 / 0.15
0.13 / 0.14
15 / 11
0.52 / 0.36
0.30 / 0.25
0.20 / 0.22
0.28 / 0.22
20 / 15
0.49 / 0.51
0.27 / 0.29
0.38 / 0.2
0.21 / 0.24
30 / 22
0.70 / 0.55
0.37 / 0.34
0.35 / 0.37
- / 0.38
50 / 37
- / 0.84
0.55 / 0.54
0.62 / 0.57
0.31 / 0.32
100 / 75
1.64 / 1.08
1.32 / 0.69
0.84 / 0.64
0.70 / 0.56
150 / 110
1.33 / 1.74
1.05 / 1.01
0.71 / 0.67
- / 0.67
200 / 150
- / 1.92
- / 0.95
- / 0.65
- / 1.03
300 / 220
- / 2.97
1.96 / 2.97
1.33 / 1.30
- / -
350 / 250
- / -
1.86 / 1.85
- / 1.53
- / -
500 / 375
- / -
- / 1.87
- / -
- / -
NOTE!
When adjusted via the keypad (HMI), this parameter may change automatically the following
parameters: P0175, P0176, P0327 and P0328.
Summary of Contents for CFW700
Page 2: ......
Page 4: ......
Page 8: ...Summary...
Page 34: ...2 General Information 2 4 CFW700...
Page 38: ...3 About the CFW700 3 4 CFW700...
Page 56: ...7 Starting up and Settings 7 4 CFW700...
Page 58: ...8 Available Control Types 8 2 CFW700...
Page 78: ...10 VVW Control 10 8 CFW700...
Page 158: ...13 Digital and Analog Inputs and Outputs 13 28 CFW700...
