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A Semi-Analytical Multi-Objective Optimization of Outer-Rotor PM Machines for eVTOL Propulsion Systems
ID：135 View Protection：ATTENDEE Updated Time：2025-11-03 11:44:56 Hits：363 Oral Presentation

Start Time：2025-11-09 10:50（Asia/Shanghai）

Duration：15min

Session：S1 1. Renewable energy system » S11.Renewable energy system

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Abstract
In order to simultaneously achieve low-speed high torque density and high efficiency in eVTOL direct-drive propulsion systems, an outer-rotor permanent magnet (ORPM) machine is proposed and optimized by semi-analytical multi-objective fast finite element method (FFEM). First, the initial pole-slot configuration and structure of this ORPM machine are discussed. Next, based on the machine loss model, a loss calculation platform is established by using a fast finite element and semi-analytical algorithm. Then, the multi-physics and multi-objective optimization design goals, including torque, torque ripple, and efficiency, are defined for this ORPM machine, with corresponding objective functions and constraints established. Furthermore, optimization calculations are performed using the NSGA-II algorithm, yielding the Pareto front of optimal solutions. Finally, results demonstrate that compared to conventional finite element simulation, the proposed method reduces single-run simulation time by nearly 52%, increases torque density by 27%, and improves overall efficiency by 1%. Compared to traditional finite element methods (FEM), this semi analytical method significantly enhances the computational efficiency for machine loss.  
Keywords
eVTOL propulsion system,Outer-rotor permanent magnet machine,AC copper loss,semi-analytical method,fast finite element method,multi-objective optimization
Speaker
Zhe Guo
Huazhong University of Science and Technology

Submission Author
Zhe Guo Huazhong University of Science and Technology
Xinggang Fan Huazhong University of Science and Technology
Yongze Miao Huazhong University of Science and Technology
Dawei Li Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology
Yuheng Zou Huazhong University of Science and Technology
Qi Chu Huazhong University of Science and Technology
Ronghai Qu Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology
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Important Date

  • Conference Date

    Nov 07

    2025

    to

    Nov 09

    2025

  • Oct 30 2025

    Draft paper submission deadline

  • Nov 10 2025

    Registration deadline

Sponsored By
IEEE西南交通大学IAS学生分会
Organized By
西南交通大学电气工程学院
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
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