基于dsp的异步电机直接转矩控制系统研究与设计（可复制）.pdf

上海交通大学硕士学位论文摘要
基于 DSP 的异步电机直接转矩控制系统研究与设计
摘要
异步电机直接转矩控制技术是近年来迅速发展起来的一种新型的高
性能的交流调速传动控制技术与矢量控制相比具有计算简单对电
动机参数依赖性小动静态性能优良等特点本文在对直接转矩控制
技术进行理论分析和仿真研究的基础上利用 DSP 实现了控制系统的
数字化软硬件设计
本文首先介绍了异步电机直接转矩控制的基本原理从异步电机数
学模型和逆变器工作原理出发论述了空间电压矢量与电磁转矩和定
子磁链之间的关系给出了直接转矩控制系统的基本结构并对各个
主要组成部分进行了介绍接着对传统的直接转矩控制系统转矩脉
动大低速性能较差等不足之处进行了理论分析和改进探讨并简单
介绍了无速度传感器技术同时利用 Matlab/Simulink 对系统进行了建
模仿真
然后在理论分析和仿真的基础上进行了实验研究以 TI 公司电
机控制专用 DSP TMS320LF2407A 为控制核心以高集成度的新型
智能功率模块 ASIPM 作为主电路的功率器件成功地设计了一套高性
能的数字化异步电动机调速系统并采用汇编语言完成了直接转矩控
制软件的开发
论文最后给出了系统的部分实验数据实验结果表明直接转矩控
制方法能取得较好的控制效果本文所设计的系统结构简单控制精
度高动态性能良好且有较好的抗干扰性和稳定性具有一定的实
用价值
关键词: 异步电机, 直接转矩控制, Matlab 仿真,数字信号处理器,
ASIPM
第 I 页
上海交通大学硕士学位论文 ABSTRACT
RESEARCH AND DEVELOPMENT OF DIRECT
TORQUE CONTROL SYSTEM
OF ASYNCHRONOUS MOTOR BASED ON DSP
ABSTRACT
The Direct Torque Control (DTC) of asynchronous motors is a new kind
of high performance AC driving technique that has been developed rapidly
in recent years. Compared with the Vector Control, DTC has some special
characteristics, such as putation, low sensitivity to motor
parameters, and high performance for both dynamic and static situation.
Based on the research of DTC theory and simulations, the digital
implementation of DTC technology via hardware and software applications
was achieved in this research.
In this paper, firstly, the basic principle of DTC was introduced. Based
on the mathematical model of asynchronous machines and the principle of
inverters, the relationship between space voltage vectors and electrical
torque, stator flux of the motor was discussed; the basic structure of DTC
system and position were presented. Then, the cause of high torque
ripple and disadvantages of the low speed region of DTC system were
analyzed mon solutions were proposed. The speed senseless
technique was also introduced in this research. The modeling and simulation
of DTC system with Matlab/Simulink software applications were provided.
Secondly, the experimen