Design of a 48 V BLDC Motor for Military Application

Electromechanical actuators are increasingly used in aerospace applications, particularly for all electrical and space aircraft. In the recent years, unmanned aerial vehicles (UAV) have gained widespread applications. Here an electromechanical actuator is used to control the speed and position of the nose landing gear for military purpose. The hydraulic actuators had been replaced into electromechanical actuators (EMA) which has the ability to control and monitor torque. The EMA consists of a BLDC motor which has an advantage of high efficiency and excellent controllability. The main challenge of using BLDC motor in this application is that it should have good size and torque ratio with reasonable efficiency. For this reason, design has to be made analytically and motor FEA analysis has to be done with transient electromagnetic analysis for motor effectively before prototype. In this project, a 48 V BLDC motor is designed by using JMAG-Designer software. This software provides to verify the FEA analysis under transient condition. The JMAG software has the ability to evaluate all the motor characteristics like torque–speed characteristics, loss characteristics, inductance characteristics, etc. Finally, the results are inferred how the efficiency is improved with the proposed design, and the graphs generated are used to infer the design proficiency.