About The Cfw11W G2 - WEG CFW11W G2 Series User Manual

General Information

2.3 ABOUT THE CFW11W G2

CFW11W G2 inverters are the second generation of CFW11W inverters. The main differences in relation to the
previous generation are the following:
Smaller. CFW-11M G2 is shorter, slimmer and less deep than the CFW11W, allowing the installation of 3 UP11W
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G2 in panels featuring 800 mm wide, 2000 mm high and 800 mm deep columns.
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More modern. State-of-the-art components increased the inverter power.
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The CFW11W G2 is a high-performance, water-cooled product which enables speed and torque control of three-
phase induction motors. The main characteristic of this product is the "Vectrue" technology, which provides the
following advantages:
High compactness and power density.
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Programmable Vector, Scalar (V/f) or V V W control on the same product.
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The vector control can be programmed as sensorless (which means standard motors, without requiring encoder)
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or as vector control with encoder on the motor.
The sensorless vector control allows high torque and fast response, even at very low speeds or at the start.
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The vector with encoder control enables high precision in the drive throughout the speed range (even stopped
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motor).
"Optimal Braking" function for vector control, allowing the controlled braking of the motor, eliminating the use of
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braking resistor in some applications.
"Self-Tuning" function for vector control: It allows the automatic setting of control parameters and regulators
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based on the identification (also automatic) of the motor parameters and load.
The CFW11W G2 inverters present a modular design, with configurations from one to five power units (UP11W
G2), one control unit (UC11 G2) and wiring cables. The modular assembly increases the reliability of the inverter
and simplifies its maintenance. There is a single control unit (UC11 G2) which can control up to 5 UP11Ws G2.
These inverters are water-cooled, being more compact than other inverters.
The UP11Ws and UC11 G2 are supplied by a power supply of +24 Vdc.
diagram of the inverter, considering the configuration with three UP11Ws connected in parallel.
The control of the power units is done by the UC11 G2 control unit. The control unit contains the control rack of
the CFW11 line and the ICUP board. This board sends signals to all UP11Ws G2 (PWM, control signals, etc.), and
receives signals from them (current, voltage feedback, etc.).
2-4 | CFW-11W G2
Figure 2.1 on page 2-5 shows a general