General Instructions
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2.3 ABOUT THE CFW-11
The CFW-11 frequency inverter is a high performance product designed for speed and torque control of three-
phase induction motors. The main characteristic of this product is the “Vectrue” technology, which has the
following advantages:
Scalar control (V/f), V V W, or vector control programmable in the same product;
The vector control may be programmed as “sensorless” (which means standard motors without using
encoders) or as “vector control” with the use of an encoder;
The “sensorless” control allows high torque and fast response, even in very low speeds or at the starting;
The “vector with encoder” control allows high speed precision for the whole speed range (even with a
standstill motor);
“Optimal Braking” function for the vector control: allows the controlled braking of the motor, eliminating
the additional braking resistors in some applications;
“Self-Tuning” feature for vector control. It allows the automatic adjustment of the regulators and control
parameters from the identification (also automatic) of the motor parameters and load.
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