永磁式步进电动机仿真及优化设计



l 基本信息
作者: 陈柯
学生学号:98009003
班级:
系别: 精密机械与精密仪器系
专业: 机械制造及其自动化
学校:中国科学技术大学
指导老师:翟超
写作日期: 二 ○ ○ 二 年 六 月
字数: 12,384
编号: 84
类别: 理工科〉机械制造
级别:学士学位论文

目 录

第一章 绪论 …………………………………………………………………… 1
§1.1 LAMOST项目简介 ………………………………………………… 1
§1.2 LAMOST的总体结构及工作方式 ………………………………… 1
§1.3 LAMOST光纤定位单元简介 ……………………………………… 2
§1.4研究工作的提出和目标 ……………………………………………… 4

第二章 永磁式步进电动机结构与数学模型 …………………………………… 5
§2.1 步进电动机概述 …………………………………………………… 5
§2.2 步进电动机的主要性能指标 ……………………………………… 6
§2.3 永磁式步进电动机的结构与工作原理 …………………………… 7
§2.4 步进电动机的驱动方式 …………………………………………… 8
§2.5 两相永磁式步进电动机的数学模型 ……………………………… 9

第三章 永磁式步进电动机的仿真分析 ……………………………………… 13
§3.1 RLC串联电路的电磁谐振 ………………………………………… 13
§3.2 周期方波电压的傅立叶展开 ……………………………………… 14
§3.3 基于傅立叶级数的仿真分析 ……………………………………… 16

第四章 实际测试及仿真分析的修正 ………………………………………… 21
§4.1测试电路的搭制 …………………………………………………… 21
§4.2步进电动机的绕组电流实测 ……………………………………… 22
§4.3步进电动机的绕组电压实测 ……………………………………… 24
§4.4实际影响因素 ……………………………………………………… 26
§4.5仿真分析的修正 …………………………………………………… 28

第五章 结论 …………………………………………………………………… 29
§5.1 永磁式步进电动机的模型 ………………………………………… 29
§5.2 提高电动机最大静转矩的途径 …………………………………… 29
§5.3 进一步的工作 ……………………………………………………… 29
附录一 程序A ………………………………………………………………… 30
附录二 程序B ………………………………………………………………… 32

参考文献
致谢

ABSTRACT

In the LAMOST optical fiber positioning system, the veracity and the reliability of seeking star is an undoubtedly important target. Meanwhile the precondition of what the system can work smoothly is that the unit can work smoothly. The two free degrees of the optical fiber positioning unit is controlled by the step motor, by all appearances, as the driver the step motor's capability and reliability is an important role in the control of the unit. It will straight affect the work capability of the positioning unit. So it is necessary to research the permanent magnet step motor earnestly.
In order to elevation the work capability of the optical fiber positioning unit, the veracity and the betimes of the step motor's movement should be improved. As a driver like the step motor, to elevation the two capability when the load is fixedness, essentially the traction capability should be improved, thereinto the torque of the step motor is the key.
The main work of this paper is to simulate the step motor with the computer and test the electrocircuit of the step motor. Firstly make clear the configuration of the permanent magnet step motor and upbuild the mathematic model. Secondly analyse the mathematic model and find out the factors that affect the torque, educe the optimize parameter of the system by the simulate analysis. Finally test the electrocircuit of the step motor, gained the actual parameter-capability data, simultaneously validate the result of the simulate analysis.

Keywords:
LAMOST , optical fiber positioning unit , step motor , torque , phase current , Simulation , Model