Direct drive motor or alternator

A direct drive motor or alternator is a motor which is directly coupled to its load or an alternator to its driving engine or turbine without using a gear. As a matter of fact, the gears create problems of maintenance,  reliability, accuracy, mechanical plays and loss of energy efficiency that  penalize technically and economically the servomechanisms in motion control ; additionnaly they generally do not allow the presence of through hollow shafts that can be necessary for passing cables, pipes, auxiliary shafts, or other processes needed by the load. That is the reason why the machine builders have initiated since several years to eliminate the gears by using permanent magnets synchronous torque motors rotating at low speed and consequently with  high torque capability for achieving  a direct drive of the automated axis.The servo motor  may operate with various energy sources. In the case of ALXION,  we are focused on direct drive electrical motors and more particularly permanent magnet AC 3 phase direct drive motors and alternators with our ranges of ST complete motors,  STK frameless motors and STK frameless alternators.

See here our torque motors and alternators products