About The Cfw-08 - Eliwell EWCFW-08 User Manual

CHAPTER 2 - GENERAL INFORMATION
The CFW-08 frequency inverter provides two control options:

2.3 ABOUT THE CFW-08

vector control (VVC: voltage vector control) or V/F (scalar);
both types of control can be set according to the application.
In the vector control mode, the motor performance is optimized
relating to torque and speed regulation.
The "Self-Tuning" function, available in vector control, permits
the automatic setting of the inverter parameter from the
identification (also automatic) of the parameters of the motor
connected at the inverter output.
The V/F (scalar) mode is recommended for simpler
applications such as pump and fan drives. In these cases one
can reduce the motor and inverter losses by using the
"Quadratic V/F" option, that results in energy saving.
The V/F mode is also used when more than one motor should
be driven simultaneously by one inverter (multimotor
application).
For power ratings and further technical information, refer to
Chapter 7.
The block diagram below gives a general overview of the
CFW-08.
19