9-3
9
Scalar Control (V/f)
P0136
I x R
P0137
Automatic
I x R
Voltage Applied to
the Motor
P0007
P0139
Active Output
Current
Speed Reference
Figure 9.3 -
Torque Boost block diagram
Output Voltage
Nominal
1/2 Nominal
Compensation
Zone
N
nom/2
N
nom
Speed
Figure 9.4 -
Effect of P0137 on the V/f curve (P0202 = 0…2)
P0138 – Slip Compensation
Adjustable
Range:
-10.0 to +10.0 %
Factory
Setting:
0.0 %
Properties:
V/f
Access groups
via HMI:
01 PARAMETER GROUPS
23 V/f Control
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.
Summary of Contents for CFW-11 Series
Page 2: ......
Page 54: ...2 4 2 General Information ...
Page 58: ...About the CFW 11 3 3 4 ...
Page 74: ...Inverter Model and Accessories Identification 5 14 6 ...
Page 86: ...Inverter Model and Accessories Identification 6 12 6 ...
Page 94: ...Available Control Types 8 2 8 ...
Page 118: ...VVW Control 10 8 10 ...
Page 182: ...Functions Common to All the Control Modes 12 26 12 ...
Page 220: ...Dynamic Braking 14 4 14 ...