Weg CFW110088T4OYZ CFW11 premium vector variable frequency drive, 88A normal duty, 73A heavy duty, three-phase 380-480V input. NEMA 1/IP20 enclosure with standard dynamic braking and internal electronic supply. Features closed-loop vector control with encoder feedback, Optimum Flux control, and Safe Torque Off (STO) SIL3 safety. Supports plug-in communication modules for Profibus, DeviceNet, EtherNet/IP, and Modbus-TCP.

Applications involving high inertia loads, when applied short time deceleration, a large amount of energy returns from the motor to the VSD. To handle this energy, reguilar VSDs have to dissipate it as heat in power resistors. Such resistors are usually large and some installation criteria must be considered due to their heat dissipation. As an alternative to the use of braking resistors, CFW11 features a special braking method in vector control mode known as Optimal Braking. This innovation delivers a high performance braking torque without requiring a braking resistor. The following graph shows the advantages of using Optimal Braking compared to other braking methods, thus ensuring an optimized and low cost solution for braking applications.

• Two types of vector control: sensorless and closed loop vector control (encoder Interface required)
• Sensorless vector control permits high torque and quick response in open loop, even at low speeds
• The self-tuning function sets the vector control or VVW with the motor and to application load used
• By the adjustable V/F control, it is possible, for example, to adjust a quadratic V/F curve, providing energy savings for quadratic torque loads (e.g.: centrifugal pumps and fans)