WEG MVW3000 Series, Programming Manual

Page: 95 / 264

5
DETAILED PARAMETER DESCRIPTION
Description:
Addition on the automatic torque curve compensates the voltage drop in the stator resistance as a function of
the motor active current.
The criteria for the setting of P0137 are the same as those of parameter P0136.
Speed
reference
Voltage applied
to the motor
Output active
current
I x R
automatic
P0137
I x R
P0136
P0139
P0007
+
+
P0001
Figure 5.10: Block diagram of P0137
N
nom
/2
Compensation
zone
N
nom
Rated
1/2 Rated
2.5% Rated
Output voltage
Speed
Figure 5.11: V/F curve with automatic torque boost
✓
NOTE!
This parameter is only visible on the HMI when: the control type is scalar, P0202 = 0 (V/F 60 Hz) or
P0202 = 1 (V/F 50 Hz).
P0138 - Rated slip
Adjustable range: -10.00 to 10.00 % Factory setting: 0.00 %
Acesso: Menu
→
Configurations
→
Control
Description: Scalar mode:
Parameter P0138 (for speeds between -10.00 % and +10.00 %) is used in the motor Slip Compensation
function. It compensates the motor speed drop due to the application of load. It increments the output
frequency as a function of the increase in the motor active current.
P0138 allows the user to set precisely the slip compensation on the MVW3000. Once P0138 is set, the
inverter will keep the speed constant even with load variations by means of the automatic setting of voltage
and frequency.
P0139
P0138
Slip
compensation
Total reference Speed
Output active
current
Δ F
+
+
Figure 5.12: Block diagram P0138 (scalar)
MVW3000 | 5-19