About The Cfw501 - WEG CFW501 V1.8X Programming Manual

3 ABOUT THE CFW501

The frequency inverter CFW501 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 (V V W ) or scalar (V/f) control,
both programmable according to the application.
In the vector mode, the operation is optimized for the used motor, providing a better performance in terms of speed
control torque. The "Self-Tuning" function, available for the vector control, allows the automatic setting of control
parameters and controllers based on the identification (also automatic) of the motor parameters.
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 by adjusting the V/f curve using the parameters
based on quadratic curve approximation of the V/f relationship, which results in energy saving. The V/f mode is
used when more than a motor is activated by an inverter simultaneously (multimotor applications).
The main components of the CFW501 can be viewed in the block diagram of
on page 3-2 and Figure 3.2: Main components of the CFW501 on page
designed to simplify the connection and maintenance, as well as to ensure the safety of the product.
Developed to meet the main technological requirements of the market, the CFW501 has a plug-in modular interface
which adapts to the application. As shown in item 4 of
3-3, the plug-in allows the CFW501 to meet the requirements of different applications.
All CFW501 interface models feature communication in physical media RS485 with Modbus RTU and resources
for data transfer via memory card.
Figure 3.1: CFW501 block diagram
3-3. The mechanical project was
Figure 3.2: Main components of the CFW501 on page
About the CFW501
CFW501 | 3-1
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