CFW11W offers higher power than conventional inverter drives

WEG Electric Motors (UK) Ltdvisit website


The CFW11W water-cooled drive from WEG offers up to 40 per cent higher power in a more compact size than standard air-cooled inverters, enabling manufacturers across a wide range of industries to increase efficiency and optimise processes.

Space on production plants is often limited, with only minimal room available for the installation of automation components. Furthermore, increasingly powerful drive systems require modern and efficient cooling methods. The modular, water-cooled CFW11W frequency inverter from WEG offers a solution to these challenges.

With power ratings from 450kW to 2800kW, CFW11W is suitable for low-voltage applications and is suitable for critical and support drive systems. As the inverter is water-cooled, there is no need for fans, which offers significant size and cost savings compared with air-cooled models.

Available with an IP54 protection rating as a minimum, the CFW11W is robust, with enhanced cooling efficiency enabling it to operate without power loss at temperatures of up to 45degC. In addition, the modular architecture of the CFW11W allows up to five power modules to be incorporated in a switchgear unit and controlled using a single operator panel, allowing the inverter to be optimally adapted to specific customer power requirements.

Johannes Schwenger, Head of Drive Systems Product Management at WEG says: “Our water-cooled CFW11W inverters are used wherever space is tight and suitable process water is already available. Compared to conventional models of the same size the CFW11W inverters deliver significantly higher power. For example, a water-cooled inverter with a 2.8MW power rating has smaller dimensions than an air-cooled model with a 2MW power rating.”

Aside from water cooling, the CFW11W inverters are structurally identical to WEG’s standard CFW11M models in the same product family. The inverters support open-loop vector control or field-oriented motor control with rotary transducer feedback for very high speed and torque accuracy. This enables precise torque settings even at low motor speeds, virtually up to the stall limit of the motor.

All functions for the effective protection of low-voltage motors are integrated in the devices. This makes the drives suitable for any task which requires precision and energy savings. The CFW11W is very easy to operate as it has an integrated user interface (HMI) with a backlit graphical display and software-configurable function keys. With a wide selection of plug-in extension modules as well as plug-and-play functions, it can be adapted to customer needs quickly and easily using the USB port.

For more information on WEG’s CFW11W and variable speed drives visit

03 February 2015

WEG Electric Motors (UK) Ltdvisit website
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