About The Cfw100 - WEG CFW100 Programming Manual

3 ABOUT THE CFW100

The frequency inverter CFW100 is a high performance product which enables speed and torque control of three-
phase induction motors. This product provides the user with the options of vector (VVW) or scalar (V/f) control,
both programmable according to the application.
In the vector mode (VVW), the operation is optimized for the used motor, providing a better performance in terms
of speed regulation torque.
The scalar mode (V/f) is recommended for simpler applications, such as the activation of most pumps and fans.
In those cases, it is possible to reduce the motor and inverter losses using the option "Quadratic V/f", which
results in energy saving. The V/f mode is used when more than a motor is activated by an inverter simultaneously
(multi-motor applications).
The main components of the CFW100 can be viewed in the block diagram of
3.2 on page 3-2. The mechanical project was designed to simplify the connection and maintenance, as well as
to ensure the safety of the product.
L1/L
Power
supply
L2/N
PE
Digital
inputs
(DI1 to DI4)
Single-phase
rectifier
POWER
CONTROL
Power supplies for electronics and interfaces
between power and control
HMI
Control
board with
16-bit CPU
Figure 3.1: CFW100 block diagram
Return
Figure 3.1 on page 3-1
Inverter with
IGBT transistors
Filter
Accessories
Flash memory
module
RS-485
USB
Adapter
Advance
About the CFW100
and Figure
U/T1
V/T2
Motor
W/T3
PE
HMI
(remote)
USB- PC
RS-485
Converter
SUPERDRIVE
G2
CFW100 | 3-1
3