WEG CFW08 Vector inverter User Manual page 23

GENERAL INFORMATION
22
Expansion of the Power Range
The power range of the old µline (0.25-2HP) has been expanded to
(0.25-10HP) with the new CFW-08 line.
Control Modes
Only the CFW-08 line has:
- Voltage Vector Control (VVC) that improves the inverter performance
considerably - adding the parameters P178, P399, P400, P402,
P403, P404, P407, P408 e P409;
- the quadratic curve V/F improves the systema energy saving capability
when loads with quadratic torque x speed characteristics are driven,
like pumps and fans.
Frequency Resolution
The new CFW-08 has a frequency resolution 10 times higher than the
old µline, i.e., it has a resoltion of 0.01Hz for frequencies up to 100.0Hz
and of 0.1Hz for frequencies higher than 99.99Hz.
Switching Frequencies of 10 and 15kHz
When the new CFW-08 is used, one can set the inverter switching
frequency to 10 and 15kHz, which enables an extremly quiet operation.
The audible noise level generated by the motor with 10 kHz is lower
with the CFW-08, when compared with the µline. This is due to the
PWM modulation improvements of the CFW-08.
Inputs and Outputs (I/Os)
The CFW-08 Plus line has more I/Os than the old µline, while the
CFW-08 is equivalent to the µline in terms of of I/Os. See table below:
I/O
Digital Inputs
Analog Input(s)
Analog Outputs
Relay Outputs
µline
CFW-08
4
4
1
1
-
-
1
1
(REV contatct)
(REV contact)
CFW-08 Plus
4
2
1
2 (1 NO contact,
1 NC contact)