基于DSP的无速度传感器直接转矩控制系统的设计

毕 业 设 计 论 文 题 目： 基于DSP的无速度传感器直接转矩控制系统的设计

（院）系 电气与信息工程系 专业 自动化 班级 03学号 0101110333 学生姓名 王 永 导师姓名 唐勇奇副教授 完成日期 2005-06-13 湖南工程学院 毕业设计（论文）任务书

设计（论文）题目：基于DSP的无速度传感器直接转矩控制系统的设计 姓名王 永 系别 电气与信息工程系 专业 自动化专业 班级 0103 学号0101110333 指导老师 唐勇奇 教研室主任 唐勇奇、赵葵银

一、基本任务及要求： 本系统以异步电动机作为被控对象，研究变频调速中转速控制方法，并设计以DSP为控制核心的控制系统，软硬件设计包括：被控对象异步电动机模型的建立、主电路设计、控制电路设计、控制系统程序设计等。

二、进度安排及完成时间： 1、 第一周至第二周：明确课题任务及要求，搜集课题所需资料，掌握资料查阅方法，了解本课题研究现状、存在问题及研究的实际意义。 2、 第三周：查阅相关资料，自学相关内容，确定课题总体方案，分配课题任务，确定个人研究重点，做好选题报告。 3、 第四周至第五周：根据自己研究的方向，确定自己的总体设计方案，根据对象特性进行各种控制方法的研究，并设计硬件总体模块图及软件模块图。 4、 第六周至第十二周：完成控制系统的软、硬件设计及调试。 第十三周：整理资料，准备答辩。目 录 摘 要 ································································································································· Ⅰ

Abstract ································································································································ Ⅱ

第1章 绪论·························································································································1 1.1引言···························································································································1 1.2异步电机调速系统的发展概况 ··············································································1 1.2.1电力电子器件的发展 ·····················································································2 1.2.2微处理器的发展 ·····························································································2 1.2.3控制策略的发展 ·····························································································4 1.3本课题的主要研究工作···························································································5 第2章 异步电动机的数学模型 ·······················································································6 2.1异步电动机模型分析的数学基础········································································6 2.1.1坐标变换的原则和基本思想 ·········································································6 2.1.2三相/二相变换 ·······························································································7 2.1.3二相/二相旋转变换 ·······················································································7 2.1.4三相静止坐标系/任意二相旋转坐标系的变换 ···········································7 2.2异步电动机的动态数学模型 ··················································································8 2.2.1异步电动机在三相静止坐标系上的数学模型 ·············································8 2.2.2异步电动机在任意二相旋转坐标系上的数学模型 ·····································9 2.2.3异步电动机在二相静止坐标系上的数学模型 ···········································10 2.2.4异步电机的电磁转矩模型 ··········································································· 11 2.2.5步电动机的磁链模型 ··················································································· 11 第3章 直接转矩控制的基本原理及方法 ··································································· 14 3.1直接转矩控制概述·································································································14 3.1.1直接转矩控制技术的产生 ···········································································14 3.1.2直接转矩控制的主要特点 ···········································································14 3.2直接转矩控制（DSC）的基本思想 ······································································15 3.3直接转矩控制基本概念·························································································16 3.3.1逆变器的数学模型和空间电压矢量 ···························································16 3.3.2磁通控制原理 ·······························································································18 3.3.3转矩控制原理 ·······························································································19 3.4直接转矩基本控制系统的构成 ············································································20 3.5改正的直接转矩近似圆形磁链控制系统的实现 ················································21 3.5.1圆形磁链控制系统的构成 ···········································································22 第4章 无速度传感器控制技术的研究 ······································································· 29 4.1概述·························································································································29 4.2 MRAS速度辨识原理 ······························································································30 4.3转差速度估计器·····································································································32 4.3.1转差速度直接计算法 ···················································································32 4.3.2直接计算法存在的问题分析 ·······································································33 4.3.3转子磁链计算方法的改进 ···········································································34 第5章 系统电路设计与实现 ························································································ 36 5.1系统的线路结构·····································································································36