不规则磁体的磁场分布分析研究

2018届毕业生

毕业论文

题目:不规则磁体的磁场分布研究

院系名称：理学院专业班级：应用物理学1001

学生姓名：学号：

指导教师：教师职称：讲师

2018年 5 月 16 日

Title Theory research on the distribution of magnetic field of the irregular permanent magnet

Abstract

With the development of science and technology, more and more application of permanent magnetic materials widely, and now has become an essential part of our daily life, permanent magnetic material and usually used mainly the alloy permanent magnetic materials and permanent magnetic ferrite material two categories, according to the different nature and multi classification. Permanent magnetic material widely used in various fields of electronics, electrical, machinery, transportation, medical treatment and daily necessities, such as permanent magnet loudspeaker, telephone receiver。 magnetic system of magnetoelectric ammeter。generator, permanent magnet motor pole。the machine manufacturing industry with permanent magnet device (permanent magnetic chuck as surface grinding machine etc.> and maglev system, magnetic bearing。magnetic separation system, magnetic separation, magnetic mineral water purification system, a magnetron, a proton accelerator magnetic system etc.This paper introduces the basic conceptsfirstly , the main use of permanent magnet, the elements and choices of these materials as the permanent magnet, and analyzes their advantages and disadvantages. However, there are many parameters need to be considered for the permanent magnet, to study how to control and maintain the magnet, magnetic field distribution of irregular magnet circumstances, is of great help for the production and use of everyday, focuses on the analysis of the microscopic mechanism of magnetic field generation. Next, we selected three kinds of shape rectangular type, U type and triangle type permanent magnets of the three magnets using linear simulation COMSOL Multiphysics simulation software.Finally draws the conclusion: have a great relationship with the magnet field distribution of shape, material, boundary conditions and external temperature, pressure, medium, but with the distance gradually far, magnetic field produced by the magnet correspondingly weaker.

Keywords：Permanent magnetic materials, magnetic field, parameter ,the magnetic field distribution , COMSOL

目次

1、引言1

2、磁性材料的特性1

2.1永磁材料的基本介绍1

2.1.1简介1

2.1.2分类2

2.1.3应用2

2.2磁铁的相关参数2

2.3铁磁质的微观结构和磁化机理3

3、 COMSOL仿真5

3.1、COMSOL Multiphysics仿真软件简介5

3.1.1 COMSOL仿真的优势5

3.1.2“磁场，无电流

3.2、长条形磁体磁力线分布模拟6

3.2.1模型建立6

3.2.2模型求解6

3.3、U型磁铁7

3.3.1模型建立7

3.3.2模型求解8

3.4、三角形磁铁9

3.4.1模型建立9

3.4.2 模型求解9

4、结论10