基于TMS320LF2407A的异步交流电机控制系统设计

基于TMS320LF2407A的异步交流电机控制系

统设计

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基于TMS320LF2407A的异步交流电机控制系统设计

摘 要

三相交流异步电机，其结构简单，体积小，重量轻，价格低，维修方便，被

广泛应用于武器装备，数控机床，柔性制造技术，自动化设备等多种领域，速度控制系统的性能将直接决定发挥设备的性能。随着高性能微处理器和新型电力电子器件的出现，使得应用全控型电力电子器件和空间矢量（SVPWM）变频控制技术已经成为主流的交流电机调速的一种方式。

相对于其他微处理器，DSP具有运算速度快，他可以产生一个死区时间的PWM输出，可以实现如模糊控制和其他复杂的算法，外围硬件少，被广泛用于数字电机控制。在此设计中，以TMS320LF2407ASP芯片为核心，设计三相交流异步电机调速系统。实验结果表明，该系统具有动态响应快，控制精度高，抗干扰能力强等优点。

关键词：数字信号处理器; 交流电机；矢量控制；TMS320LF2407A 芯片

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基于TMS320LF2407A的异步交流电机控制系统设计

Abstract

Three-phase AC induction motor with its simple structure, small size, light weight, low price, easy maintenance, etc., are widely used in weaponry, feeding systems, CNC machine tools, flexible manufacturing techniques, a variety of automation equipment and other fields, the speed control system performance will directly determine the performance of the play equipment. With the high-performance microprocessors and the emergence of new power electronic devices, making the application full-controlled power electronic devices and space vector (SVPWM) inverter control technology has become a way of AC motor speed control of the mainstream.

Compared to other microprocessor, DSP with a computing speed that can produce their own dead time of the PWM output can be achieved, such as fuzzy control and other complex algorithms, less peripheral hardware, etc., which are widely used in digital motor control. In this paper, TMS320LF2407ASP chip as the core, designed for three-phase AC induction motor speed control system. Experimental results show that the system has fast dynamic response, high control accuracy, strong anti-interference advantages.

Keywords: digital signal processor; AC motor; vector control; TMS320LF2407A chip

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基于TMS320LF2407A的异步交流电机控制系统设计

目 录

摘 要 .........................................................................................................................I Abstract ......................................................................................................................... II 1绪论 ............................................................................................................................. 1 2 三相异步电动机的结构与工作原理 ........................................................................ 2

2.1 三相异步电机的结构 ..................................................................................... 2 2.2 工作原理 ......................................................................................................... 3 3 矢量控制 .................................................................................................................... 6

3.1矢量控制系统原理 .......................................................................................... 6 3.2坐标变换的基本思路 ...................................................................................... 6 3.3坐标变换 .......................................................................................................... 7

3.3.1三相——两相坐标系变换（3/2变换） .......................................... 7 3.3.2旋转变换（2s/2r变换） ................................................................ 10

4 SPWM技术 .............................................................................................................. 12

4.1 单极性法 ....................................................................................................... 12 4.2 双极性法 ....................................................................................................... 12 5 双闭环直流调速系统 .............................................................................................. 13

5 .1 调速定义 ...................................................................................................... 13 5. 2 转速、电流双闭环调速系统的组成 .......................................................... 13 6 DSPMS320LF2407A原理及最小系统设计 ........................................................ 15

6.1 DSP的简介 ................................................................................................... 15 6.2 TMS320LF2407A的系统组成与功能 ......................................................... 16

6.2.1 TMS320LF2407A的系统组成 ........................................................... 16 6.2.2 存储器配置 ...................................................................................... 16 6.2.3事件管理器模块 ............................................................................... 16 6.2.4 片内集成外设 .................................................................................. 17 6.3 DSP最小系统设计 ....................................................................................... 18

6.3.1 芯片周围电路 .................................................................................. 18 6.3.2 DSP的其他外围电路 ....................................................................... 21

7交流电机控制系统DSP的硬件电路设计 ............................................................. 24

7.1系统总体结构 ................................................................................................ 24 7.2整流及滤波电路的设计 ................................................................................ 24

7.2.1整流电路 ........................................................................................... 24

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基于TMS320LF2407A的异步交流电机控制系统设计

7.2.2滤波电路 ........................................................................................... 26 7.3 IPM选择与接口与驱动电路的设计 ........................................................... 26

7.3.1 IPM的选择 ....................................................................................... 26 7.3.2 PWM驱动及接口电路的设计 ........................................................... 27 7.4检测电路的设计 ............................................................................................ 29

7.4.1速度检测电路的设计 ....................................................................... 29 7.4.2电流检测电路的设计 ....................................................................... 30 7.5 保护电路的设计 ........................................................................................... 32 结 论 .......................................................................................................................... 33 参考文献 ...................................................................................................................... 34 致 谢 .......................................................................................................................... 35

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