High-Torque Motor for a Gearless Electromechanical Actuator

The paper discusses the development of a high-torque brushless permanent-magnet direct current (BLDC) motor. This motor is designed to operate as a part of gearless electromechanical actuator (EMA) in aircraft. Compared to its counterparts, the BLDC motor of our design has a 20.5% greater specific torque. The paper presents the results of finite-element analysis for this BLDC motor. The specific power reached stands at 0.77 kW/kg. The paper also shows a test mockup of this BLDC motor. This paper describe the technical solutions behind the BLDC motor, intended to reduce both the size and the losses. The contribution of this research to the EMA motor design consists in making such a BLDC motor design that has high specific torque, while featuring minimum mass and volume. The obtained results are important for the efficient implementation of high-torque BLDC motors in aircraft industry as well as for the more electric aircraft concept.