High performance brushless electric servo-motor
2.6 - 27 Nm | Ultract III Phase Motion Control S.r.l.

The ULTRACT III series of high performance servo motors, produced in the new Phase Motion Control plant specialized in high performance servo motors, is based on the last generation of rare earth magnets and embodies the patented Phase surface magnet assembly technology, which endows the motors with the highest torque density. The Ultract III range improves on the ULTRACT II with a number of significant technological innovations, namely:

- Standard shaft technology. To avoid the traditional dichotomy between key–smooth shaft applications, Phase Motion Control releases the new standard shaft in which a key seat is filled with an insert (photo below) and the whole set is ground to shaft tolerance. The shaft is therefore round and ready for clamping with conical hubs (recommended). If a key is required (and the corresponding reduced servo performance is accepted) the insert can be removed and a standard key inserted. All shafts are balanced with the insert so that simple rotating parts (e.g. pulleys, gears) need not to be balanced.

- Safety brake: All motors except UL 071040 have an internal cavity where the PM safety brake can be mounted. The brakes are all rare earth permanent magnet type. This new high power density brake operates without brake pads. As a consequence, the problem of pollution of the motor cavity when the brake is operated incorrectly is avoided.