Multi-objective Optimization of an Outer Rotor BLDC Motor Based on Taguchi Method for Propulsion Applications

Brushless DC (BLDC) motors are well-known as a type of motors with high power to weight ratio and high efficiency. These characteristics enable BLDC motors to be used in propulsion application. The propulsion systems require light weight, high power motors with Low operational noise and cogging torque, which signifies the need of multi objective optimization of the motor in this application. In this paper, the design process of BLDC motors is explained and a BLDC motor is proposed. Then the motor is optimized based on Taguchi design of experiments to achieve a lightweight, high power density and low noise motor. The process is also studied with Analysis of Variance (ANOVA). To validate the optimization results, the final motor is simulated with the Finite Element Method (FEM) and compared to the initial design.