General Information
2-4 | CFW-11M G2
2
Ω:
ohms.
2.3 ABOUT THE CFW-11M G2
The CFW-11M G2 inverters are the second generation of the CFW-11M inverters. The main differences in relation
to the previous generation are the following:
Smaller. The CFW-11M G2 is shorter and slimmer than the CFW-11M, allowing the installation of 3 UP11 G2 in
panels featuring 800 mm wide and 2000 mm high columns.
More modern. State-of-the-art components increased the inverter power.
The CFW11 G2 is a high-performance 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.
Scalar control (V/f), VVW or vector control programmable in the same product.
The vector control can be programmed as “sensorless” (which means standard motors, without requiring
encoder) 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.
The “vector with encoder” control allows high speed precision for the whole speed range (even with a standstill
motor).
"Optimal Braking" function for vector control, allowing the controlled braking of the motor, eliminating the use of
braking resistor in some applications.
"Self-Tuning" function for vector control: It allows the automatic setting of control parameters and regulators
based on the identification (also automatic) of the motor parameters and load.
The CFW-11M G2 inverters present a modular structure, with configurations from one to five power units (UP11
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 UP11s G2.
The UP11s and UC11 G2 are supplied trough a power supply of +24 Vdc.
shows a general
diagram of the inverter, considering the configuration with three UP11s 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 CFW-11 line and the ICUP board. This board sends signals to all UP11 G2 (PWM, control signals, etc.), and it
receives signals from them (current, voltage feedback, etc.).