SEM (www.sem.co.uk), one of the world’s leading designers and manufacturers of AC permanent magnet servomotors, has launched its latest lineup of liquid-cooled servomotors at this year’s SPS/IPC/Drives show in Germany.

Delivering over twice the power of standard servomotors, the new HW series liquid-cooled servomotors also offer optimized dynamic performance. The Kent-based company has included the cooling jacket without significantly increasing the motor housing’s size, while improving the 190 frame models’ output power to 29 kW and the stall torque to 134 Nm. This means that the company has increased the power density by almost three-fold as compared to standard air-cooled servomotors with similar flange-size.

“In developing these liquid-cooled servomotors we have addressed a number of issues that were being raised by customers,” said Steve Jackson, Sales and Marketing Manager at SEM.

“In particular, where motors are used in precision applications, such as machine tools, they may wish to limit the heat that the motor generates and, in turn, maintain a steady ambient temperature. This will help to overcome problems associated with temperature fluctuations during operation of machines that may be working to micron tolerances.”

Compatible with the company’s current motors, the newest range of liquid-cooled servomotors are offered with standard flanges. In addition, customers can select various feedback devices, including precision encoders and resolvers.

The motor’s dynamic performance makes it ideally suited for use in high-speed positioning and packaging systems, punch presses and servo pump drives.