電動汽車直驅式軸向磁通永磁直流無刷馬達最佳化設計

Optimal Design of Axial-flux Permanent Magnet In-Wheel Motor for Electric Vehicle

莊璫旭(Down-Xu Chuang)

指導教授 ： 陽毅平

國立臺灣大學/工學院/機械工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.00722

摘要

軸向磁通永磁式直流無刷馬達具備了高扭力、高力矩密度及高效率等優點，適合應用在直驅式電動汽車車輪馬達上。首先針對電動汽車馬達的設計與要求做評估，將評估的結果做為馬達設計的限制條件。本文的主旨在於利用建立簡化的馬達力矩方程式及電壓方程式來計算軸向磁通馬達的效能，並且配合多目標函數最佳化軟體，在特定的空間及材料特性限制下，針對特定的目標或規格進行多目標函數最佳化。再將最佳化幾何尺寸做3維有限元素電磁分析軟體做驗證，並且利用3維有限元素電磁分析軟體做細部的調整，使得馬達的重量及力矩鏈波可以再獲得改善。本文的主旨之二是希望利用這套設計的流程，可以設計出符合電動汽車規格要求的馬達，並且達到高力矩輸出、高轉速、高效率及輕量化的目標。

關鍵字

電動汽車 ； 最佳化設計 ； 車輪馬達 ； 有限元素分析

並列摘要

Axial-flux permanent magnet motors have the advantages of high torque and high torque density and high efficiency. Before the design of electric vehicle, it is necessary to know the requirement of it. The requirement should be include at least the maximum torque, the maximum speed and the rated power for propulsion. The performance of the motor would set to the constraint of the optimal design. The first topic of this thesis is using energy method to establish the simplified torque equation, and the voltage equation is used to calculate the other performances of the motor. At the constraint of finite space and geometry, the optimal theory can help to find the best performance by changes of design variable. The Multi-Object System Tool (MOST) is used to make Optimization possible. The Optimal results are investigated by 3D Finite-Element Analysis (FEMA) Electromagnetic analysis software. According to the results of 3D FEMA Electromagnetic, some detail geometry can be modified without changing the optimal results to achieve better performance, like lightening weight and minimizing the torque ripple of the motor. The second topic of this thesis is to use this optimal design process to design high torque output, high speed, high efficiency and light weight motor for electric vehicle.

並列關鍵字

Electric Vehicle ； in-wheel motor ； finite element analysis ； Optimal Design

參考文獻

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