Technologies inside: Permanent magnet servomotors
Kollmorgen B-series motors and large Kollmorgen Cartridge DDR motors provide advantages for some applications previously served by induction motor systems.
The buried magnet rotor technology of Kollmorgen B-series motors offered a significantly lower inertia than any induction motor of similar ratings. With a lower inertia, dynamic performance can be superior to any other motor technology today, according to Lee Stephens, senior motion control engineer, Kollmorgen. Part of the Kollmorgen Goldline Series, the motors include a wide range of voltages, sizes, options, and co-engineered modifications. The permanent magnet (PM) design offers high torque and power density.
Large Kollmorgen Cartridge DDR motors are typical of a servomotor that encroaches on the domain of induction motors, Stephens said. They combine the performance advantages of a frameless motor with the ease of installation of a full-frame motor, with an integrated, factory-aligned high-resolution feedback device and a unique bearingless design that couples directly to the load, using the machine’s own bearings to support the rotor. Most models can be installed in under five minutes.
- Lee Stephens is senior motion control engineer, Kollmorgen, Radford, Va. Edited by Mark T. Hoske, content manager, CFE Media, Control Engineering and Plant Engineering, mhoske(at)cfemedia.com.
Also read, linked below: Permanent magnet servomotors versus induction motor systems for another photo and more about choosing the right motor for the application.