WEG CFW100 Programming Manual page 70

Sequence for installation, verification, power up and start-up:
1. Install the inverter: according to chapter 3 Installation and Connection of the user's manual, making all the
power and control connections.
2. Prepare and power up the inverter according to Section 3.2 Electrical Installation of the user's manual of the
frequency inverter.
3. Load the factory default with P204 = 5 (60 Hz) or P204 = 6 (50 Hz), according to the input rated frequency
(power supply) of the inverter used.
4. Set the value of P296 according to the rated supply voltage (only for the 400 V Line).
5. In order to set a V/f curve different from the default, set the V/f curve using parameters P136 to P146.
6. Setting of specific parameters and functions for the application: program the digital and analog inputs and
outputs, HMI keys, etc., according to the application requirements.
P136 - Manual Torque Boost
Range: 0.0 to 30.0 %
Properties: V/f
Description:
It actuates at low speeds, that is, in the range 0 to P146 (V/f) or 0 to P145 (Quadratic V/f), increasing the inverter
output voltage so as to compensate the voltage drop in the motor stator resistance in order to keep the torque
constant.
The optimum setting is the smallest value of P136 which allows the motor satisfactory start. A value greater than
necessary will excessively increase the motor current at low speeds, which may lead the inverter to a fault condition
(F051 or F070) or alarm condition (A046 or A050), as well as motor overheating.
Figure 8.16 on page 8-22
respectively.
Output
voltage (%)
show the actuation regions of the Torque Boost for the V/f and Quadratic V/f mode,
P142
P143
P
1
P136
P
0
P146
Figure 8.15: Torque boost region for quadratic V/f control mode
Figure 8.15 on page 8-21
P P
2 3
P145 P134
Output
frequency (Hz)
Micro Mini Drives | 8-21
MOTOR CONTROL
and
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