摘要无刷直流电机涉及电力电子技术、材料科学、电机理论以及微电子技术等诸多学科，属于典型的机电一体化产品，因具有高效率、高可靠性特点而在国民经济各个领域，如航空航天、工业自动化、精密电子仪器与设备、医疗器械等方面的应用日益广泛。 64277

在对无刷直流电机的背景知识和课题研究意义进行了简要阐述之后，本文主要进行了以下计算分析和设计工作： 

首先，利用场路结合法设计了一款30W，24V的小功率无刷直流电机，通过Ansoft 软件中的Rmxprt模块得到了电机在不同运行状态下的运行参数和性能曲线，并对运行参数和性能曲线进行了详细分析。接着，利用软件的参数分析功能，研究了电机主体参数对其性能的影响，对电机主要尺寸数据进行了优化设计。最后，应用有限元分析软件对电机进行了进一步的模拟分析，深入分析了电机空载运行时的磁场特性，得到了工作曲线，再次验证了设计的合理性。 

毕业论文关键词  永磁无刷直流电机  设计  有限元分析  磁场分析

毕业设计说明书（论文）外文摘要

Title   The Design of Brushless DC Motor              

Abstract

Permanent magnet brushless DC motor is a kind of high-tech products which integrated power electronics, material science, electrical machine and micro electronic technique. There are varieties of advantages of brushless DC motor, such as high efficiency, high power density, high reliability. Therefore, brushless DC motor is more and more popular in every field of national economy. It is widely used in aerospace, industrial automation, precision electronic instruments and equipment, medical apparatus instruments. 

This essay briefly introduced the background knowledge and research significance of brushless DC motor. This essay has carried out work in the following three aspects.

Firstly, a design method combining field and circuit is chosen to design a 30W, 24V brushless DC motor. After getting the performance and curves of the motor after a simulation by Rmxprt I briefly analyzed them. Then, an optimization design is made to optimize the main data of brushless DC motor, this simulation gives us a deep impression about the influence motor data made to the motor performance. Finally, a software of finite element analysis is used to analyze the character of magnetic filed when the motor is in no-load operation, the analysis once again verifies the rationality of the design.

Keywords Permanent Brushless DC Motor, Design, Finite Element Analysis, Magnetic field analysis

目  录

毕业设计说明书（论文）中文摘要 I

毕业设计说明书（论文）外文摘要 II

1  绪论 1

1.1无刷直流电机国内外研究的发展概况 1

1.2无刷直流电机的特点及应用 2

1.3论文选题的意义及主要工作 3

2  无刷直流电机的工作原理及基本结构 3

2.1无刷直流电机的工作原理 3

2.2无刷直流电机的基本结构 5

2.2.1永磁无刷直流电机本体结构 5

2.2.2转子位置传感器 5

2.2.3逆变器 7

3  永磁无刷直流电机的设计及有限元分析 7

3.1无刷直流电机的设计方法