WEG CFW-11 Programming Manual page 97

Speed Reference
Active Output
Current
P0138 – Slip Compensation
Adjustable -10.0 to +10.0 %
Range:
Properties: V/f
Access groups 01 PARAMETER GROUPS
via HMI:
Description:
The parameter P0138 is used in the motor slip compensation function, when adjusted to positive values. In this
case it compensates the drop in the speed due to the application of load to the motor shaft. It increases the output
frequency in function of the increase in the motor active current.
The setting of P0138 allows regulating the slip compensation precisely. Once P0138 is adjusted the inverter will
keep the speed constant even with load variations by adjusting the voltage and frequency automatically.
Negative values are used in special applications where one wants to reduce the output speed in function of the
increase in the motor current.
E.g.: Load distribution in motors operated in parallel.
P0136
I x R
P0137
Automatic
I x R
P0139
Figure 9.3 - Torque Boost block diagram
Output Voltage
Nominal
1/2 Nominal
Compensation
Zone
Figure 9.4 - Effect of P0137 on the V/f curve (P0202 = 0...2)
23 V/f Control
P0007
Voltage Applied to
Speed
N N
nom/2 nom
Scalar Control (V/f)
the Motor
Factory 0.0 %
Setting:
9-3
9