WEG CFW-11 Series, Programming Manual

Page: 292 / 307

PM Vector Control
21-4
21
21.2.3 Modified Functions
Almost all the functions presented in this manual remain active when the options 6 or 7 are programmed in
P0202. The functions no longer active or that suffered any modification are described in the
Section 21.3
PROGRAMMING BASIC INSTRUCTIONS – INCOMPATIBILITY BETWEEN PARAMETERS on page 21-4 to
Section 21.9 FAULTS AND ALARMS on page 21-18 .
Neither are the inactive functions (e.g., running the self-tuning - P0408), nor the parameters associated to those
functions (e.g., I/f control - P0182 and P0183), visualized on the HMI.
21.3 PROGRAMMING BASIC INSTRUCTIONS – INCOMPATIBILITY BETWEEN PARAMETERS
Refer to Section 5.7 INCOMPATIBILITY BETWEEN PARAMETERS on page 5-12 .
21.4 INVERTER MODEL AND ACCESSORIES IDENTIFICATION
P0297 – Switching Frequency
Adjustable
Range: 0 = 1.25 kHz
1 = 2.5 kHz
2 = 5.0 kHz
3 = 10.0 kHz
4 = 2 kHz Factory
Setting: According
to inverter
model
Properties: CFG
Access groups
via HMI: 01 PARAMETER GROUPS
42 Inverter Data
Description:
Refer to the allowed current for switching frequencies different from the default, in the tables available in
chapter 8 - Technical Specifications, of the CFW-11 user's manual.
The inverter switching frequency can be adjusted according to the needs of the application.
Higher switching frequencies imply in lower motor acoustic noise, however, the selection of the switching frequency results
in a compromise between the motor acoustic noises, the losses in the inverter IGBTs and the maximum allowed currents.
The reduction of the switching frequency reduces the earth leakage current, being able to avoid the actuation of the
faults F074 (Ground Fault) or F070 (Output Overcurrent/Short Circuit).
Note: The option 0 (1.25 kHz) is only allowed for the V/f or VVW control modes (P0202 = 0, 1, 2 or 5).
Option 3 (10 kHz) is not allowed in the PM control mode (P0202 = 7)
21.5 TORQUE CONTROL
It is possible to use the inverter to control the motor torque when in vector mode. One of the configurations consists in
keeping the speed regulator saturated and the other in selecting between torque and speed control through a digital input.