To facilitate the processing, transportation and assembly of permanent magnet, a segmented PM design with positioning slots is proposed for an outer-rotor brushless DC motor in this article. First, the effect of the iron bridge between the segmented PMs on the motor performance is investigated by the method of finite element analysis. Further, a multi-objective optimization algorithm based on metamodel of optimal prognosis is employed to optimize the geometry of the iron bridge and the optimal solution is determined from the Pareto front by taking a tradeoff design between different objectives. After optimization, a detailed comparative analysis of the motor performance between initial and optimized design is carried out to verify the superiority of the optimized motor.
|Title of host publication||23rd IEEE International Conference on Industrial Technology|
|Publisher||IEEE Industrial Electronics Society|
|Publication status||Accepted/In press - 1 Mar 2022|
- Outer-rotor brushless DC (BLDC) motor, segmented permanent magnet (PM), iron bridge, multi-objective optimization (MOO), average torque, torque ripple