WEG CFW08 Vector inverter User Manual page 77

DETAILED PARAMETER DESCRIPTION
[Factory Setting]
Parameter
P133 (1)
Minimum Frequency
(F )
min
(1)
P134
Maximum Frequency
(F )
max
P136
Manual Torque
Boost 01.6-2.6-4.0-7.0A/
(IxR Compensation)
This parame-
ter is only available
in V/F control
(P202=0 or 1)
13-16A/380-480V ]
Output Voltage
(% of the line voltage)
P142
P136xP142
0
(a) P202=0
Figure 6.6 - V/F curve and details of the manual torque boost (IxR compensation)
P137
Automatic Torque
Boost
(Automatic IxR
Compensation)
This parame-
ter is shown only in
V/F control
(P202=0 or 1)
(1) This parameter can be changed only with the inverter disabled (motor stopped).
76
Range
Unit Description / Notes
0.00...P134 Defines the maximum and minimum output frequency (motor)
[ 3.00Hz ] when inverter is enabled.
0.01Hz (<100.0);
It is valid for any type of speed reference.
0.1Hz (>99.99)
The parameter P133 defines a dead zone when analog inputs are
used - see parameters P234 ... P240.
P133...300.0
P134 and the gain and offset of the analog input(s) (P234, P236,
[ 66.00Hz ]
P238 and P240) define the scale and the range of the speed
0.01Hz (<100.0);
variation via analog input(s). For more details see parameters
0.1Hz (>99.99)
P234 ... P240.
Compensates the voltage drop due to the motor stator resistance.
0.0...30.0%
It acts at low speeds by increasing the inverter output voltage,
[ 5.0% for
in order to maintain a constant torque during the V/F operation.
The best setting is to program the lowest value for P136 that still
200-240V and
permits the motor start satisfactorily. If the value is higher than
1.0-1.6-2.6-4.0A/
required, an inverter overcurrent (E00 or E05) may occur due to
380-480V;
high motor currents at low speeds.
2.0% for
7.3-10-16A/
200-240V and
2.7-4.3-6.5-10A/
380-480V;
1.0% for
0.1%
Output
Frequency
P145
The automatic torque boost compensates for the voltage drop in
0.00...1.00%
the stator resistance as a function of the active motor current.
[ 0.00 ]
The criteria for setting P137 are the same as for the parameter
-
P136.
Output Voltage
(% of the line voltage)
P142
P136
0
(b) P202=1
Output
Frequency
P145