In recent years, the adoption of Electro-Mechanical Actuators (EMA) in the aerospace sector, mainly as secondary actuation devices, is strongly increasing, in particular in the more electric and all electric design philosophies. These approaches aim at creating a single form of secondary power, in order to drive all users (systems); the only form of energy so versatile to be capable of accomplishing such task is electric energy. While using electricity, EMAs provide the natural electro-mechanical interface needed to convert secondary power, electricity, to useful mechanical work. At this moment, the use of EMAs in large scale commercial aircrafts is relegated to secondary flight control actuation (flaps, slats, airbrakes), while the use as main flight control surfaces actuation is still limited to small UAVs.