Polyphase motors and drives - The prospects of higher power by wire system for aerospace application

The paper proposes a poly phase BLDC motor based electromechanical actuator system for higher capability engine gimbal control applications. The scheme is based on the inherent advantages of the polyphase system together with the requirements of higher power capability actuation system. The paper presents in detail the generation of commutation logic for a five phase motor. The modelling of a five phase BLDC motor and its validation in closed loop as a position servo system in MATLAB/SIMULINK is detailed. The evaluation of the inherent fault tolerant capability of the five phase motor based electromechanical actuator is also validated through simulations and the results are highlighted. The hardware implementation of the five phase BLDC motor drive was carried out and the experimental results are presented.