01 November 2015

WEG, a leading manufacturer of drive technology, has introduced ultracompact water-cooled motors which enable engineers to save space by delivering the same power in a frame size one or two times smaller than ordinary water-cooled motors.

Designed by WEG’s new subsidiary, Antriebstechnik KATT Hessen (AKH), the UTTW and USTW series feature an innovative patented cooling system and offer 1.5 to 2.6 times the power density of conventional water-cooled motors, ensuring reduced heat dissipation and thus a smaller frame size. These characteristics enable them to achieve high torque and maximum speed of up to 12,000 rpm in a very small package.

“Saving space and weight as well as reducing energy are top of the agenda in today’s manufacturing world, especially when it comes to applications such as electric vehicles, mobile machinery and test stand equipment. With this in mind, AKH water-cooled motors feature a cooling system, which allows the dissipated heat to be removed directly at the source,” says a spokesman.

This feature dramatically reduces the size and weight of the motor by eliminating the concentric steel tubes of the water jacket surrounding conventional water-cooled motors. For example, an AKH water-cooled motor with 300 kW rated power in frame size 180 (type UTTWp 180.4-4) is equivalent to a conventional motor with water jacket cooling and the same rated power in frame size 315.

The AKH water-cooled motors are energy efficient, reaching efficiency levels up to IE4, enabling users to optimise their processes and they ensure very smooth running and low noise levels, which is vital for users working in confined spaces.

The induction motors in the UTTW series cover the power range from 24 to 240 kW with a shaft height of 112 to 180 mm, while the UTTW(p) series of premium induction motors – equipped with a water-cooled rotor – covers the range up to 300 kW with the same shaft heights. The water-cooled synchronous motors in the USTW series feature the same compact design and are available with rated power of up to 440 kW.

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