Performance Evaluation of Different Rotor Configurations in Outer Rotor Brushless Permanent Magnet Motor for Uav Applications

This paper investigates the influence of different rotor configurations on the performance of an outer rotor brushless permanent magnet motor (OR-BPMM). A 2 kW ORBPMM is designed using analytical equations, followed by a detailed evaluation through finite element method (FEM)-based simulations. Three rotor configurations are considered: Design I (arc-shaped permanent magnets with a cylindrical rotor back iron), Design II (rectangular-shaped permanent magnets with a cylindrical rotor back iron featuring a flattened base), and Design III (rectangular-shaped permanent magnets with a cylindrical rotor back iron). The study examines key performance metrics, including torque, torque ripple, efficiency, weight, volume, manufacturing complexity. The comparative analysis provides valuable insights into the trade-offs associated with different rotor designs, facilitating the selection of an optimal configuration for improved motor performance.