近年來，由於氣候變化對地球的影響，人們開始更加關注環境保護，歐盟打算到 2035 年完全禁止銷售內燃機汽車，由於這些因素，汽車行業正在從內燃機轉向由電動機驅動的汽車，上述論點證明了電動機的未來發展潛力。電動機開發不僅於汽車產業扮演重要角色，在自動化工廠中也用到許多。
本文使用有限元素分析來做無刷馬達設計， 無刷直流電機用於電動滑板車，在平坦道路上以 20 公里/小時的速度行駛，在這種情況下，選用外轉子無刷直流電機其原因為效率高、啟動轉矩大、產品壽命較長，電機開發階段馬達規格包含扭矩、轉速、電池的續航力及安裝空間等，通過電機分析軟體能更快得到設計後馬達的工作點的參數及輸出圖表，目地減少反覆打樣測試過程，降低開發成本。

People have begun to pay greater attention to environmental preservation in recent years as a result of the effects of climate change on the globe. By 2035, the European Union plans to prohibit the sale of internal combustion engine cars entirely. The automobile industry is transitioning from internal combustion engines to electric motors as a result of several causes. Electric motors play a major part in the automotive industry, but they are also employed in a variety of other sectors due to their potential for future growth. This thesis seeks to investigate and build BLDC electric motors based on the huge potential of electric motors in the future.
This article uses finite element analysis to design the brushless DC motor. The BLDC motor is used for electric scooters, driving at a speed of 20 km/h on flat roads. Motor specifications include torque, speed, power, and installation space in the motor development phase, which is why the outer rotor brushless DC motor was chosen for high efficiency, high starting torque, and extended product life. The motor analysis software can rapidly acquire the operating point parameters and output, as well as charts, for the designed motor. The solution is to reduce development costs by reducing the number of times proofreading and testing is done.

摘要...i
Abstract...ii
Acknowledgements...iv
Table of Contents...vi
List of Tables...ix
List of Figures...x
List of Symbols xii
Chapter 1 Introduction...1
1.1 Project motivation...1
1.2 Research Methodology...1
1.3 Outline of the thesis...3
Chapter 2 Overview of Brushless DC Motor (BLDC)...5
2.1 BLDC motor structure...5
2.2 Working principles of BLDC motor...6
2.3 BLDC motor classification...6
2.4 BLDC motor control...8
Chapter 3 Introduce about ANSYS Maxwell...14
3.1 Finite Element Analysis...14
3.2 ANSYS RMxprt...15
3.2.1 The machine selection window...17
3.2.2 The project manager window...18
3.2.3 The machine properties window...19
3.2.4 The circuit properties window...20
3.2.5 The stator window...20
3.2.6 The slot dimension window...21
3.2.7 The stator winding window...22
3.2.8 The rotor window...23
3.2.9 The pole properties window...24
3.2.10 The shaft properties window...24
3.2.11 The analysis setup window...25
3.2.12 The solution data...26
3.3 ANSYS Maxwell 2D/3D...28
Chapter 4 BLDC motor analysis and design...29
4.1 Specifications of motor design...29
4.1.1 Air Resistance of electric scooter...30
4.1.2 Rolling Resistance of electric scooter...31
4.1.3 Climbing resistance of electric scooter...32
4.1.4 Acceleration Force of electric scooter...32
4.1.5 Total Power...33
4.1.6 Angular Velocity...33
4.1.7 Torque...33
4.1.8 System design for electric scooter...33
4.2 Motor geometry design for BLDC motor...35
4.2.1 Rotor Configuration Design...35
4.2.2 Stator Configuration Design...36
4.2.3 Combination of slots and poles...36
4.3 Design BLDC motor 21 slot, 16 pole in ANSYS Maxwell RMxprt...37
4.3.1 General machine and circuits of motor:...37
4.3.2 Stator configuration dimensions:...38
4.3.3 Slot dimensions:...38
4.3.4 Winding data:...39
4.3.5 Rotor configuration dimensions:...39
4.3.6 Pole design:...40
4.3.7 Analysis setup:...40
4.3.8 21 slot, 16 pole BLDC motor design model...41
Chapter 5 Analysis and simulation results of BLDC motor...42
5.1 Output parameters of BLDC motor in RMxprt...42
5.2 Performance curves of motor in RMxprt...43
5.3 ANSYS Maxwell 2D Results and Overlays...44
5.3.1 The Magnet Flux Linkage and Flux Line...46
5.3.2 Torque analysis...48
5.3.3 Demagnetization Analysis...49
Chapter 6 Conclusions and recommendations...52
Reference...53
Extended Abstract...55

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