헤어핀 권선을 적용한 영구자석 동기전동기의 메타모델 기반 최적 설계

Abstract

This paper optimizes a permanent magnet synchronous motor (PMSM) with hairpin winding technology to enhance efficiency and reduce torque ripple, thereby improving the driving range and reducing Noise, Vibration and Harshness (NVH) in electric vehicle traction motors. Target specifications were defined, and multiphysics analysis was conducted to identify key design variables through sensitivity analysis. Using the optimal Latin hypercube design method, 30 experimental points were selected, and finite element analysis (FEA) was performed for each. Eleven metamodeling techniques were employed to approximate the objective function and constraints. A hybrid metaheuristic algorithm was then used to derive optimal solutions, which were validated via FEA. The optimization achieved a 0.87 % improvement in efficiency and a 2.39 % reduction in torque ripple while satisfying all constraints, demonstrating the effectiveness of the proposed metamodel-based optimization approach for eco-friendly vehicle traction motors.