基于单片控制的交流调速设计-毕业设计
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基于单片控制的交流调速设计 学生：XX 指导教师：XX 内容摘要： 本文介绍了一种利用专用集成电路SA4828 设计电机变频调速的方
法。系统主要包括主电路与控制电路，主电路采用IPM智能功率模块作为电机的控制。控制电路由MCS-51系列的8051单片机最小系统和SA4828 三相SPWM 产生器及少量的扩展外围芯片构成，充分发挥其控制电路简单、控制方式灵活、输出波形优点多的特点，结合相应的软件，实现电机的调速要求。其中主要内容包括：SA4828的特性介绍及变频系统的主电路、驱动电路、保护电路、速度检测、调速系统及软件编程设计方法。所设计的系统实现了变频调速的全数字化控制，实时性好，可靠性高。
关键词：单片机 SA4828 变频调速 SPWM 电动机
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The Design of Motor VVVF System Based On MCU Abstract: This article describes a use of SA4828 ASIC(Application
Specific Integrated Circuit) design motor VVVF system. The system includes the main circuit and control circuit, main circuit used as the Intelligent Power Module IPM motor control. The control circuit is constituted by the MCS-51 series of 8051 systems、three-phase SPWM generator SA4828 and the expansion of a small number of peripheral chips. Give full play to its control circuit is simple, flexible control, the advantages of multi-output waveform characteristics, combined with appropriate software, to achieve the speed requirements of motor control. The system has all-digital VVVF control, real-time, and high reliability.
Keywords: MCS-51 SA4828 VVVF SPWM Motor-Control III
目 录 前言 .................................................................................................................................... 1 1 概述 ............................................................................................................................. 1 1.1 电动机调速系统的发展 ............................................................................... 1 1.2 交流调速系统................................................................................................ 2 1.3 单片机控制的变频调速 ............................................................................... 3 2 电机变频调速系统 .................................................................................................... 4 2.1 变频调速原理................................................................................................ 4 2.2 单片机控制的变频调速系统....................................................................... 5 2.2.1 系统框图 ........................................................................................... 5 2.2.2 硬件系统原理图 ........................................................................... 5 3 系统主要模块设计 .................................................................................................... 6 3.1 IPM模块 ..................................................................................................... 6 3.1.1 IPM的结构 ...................................................................................... 6 3.1.2 IPM内部功能机制 ......................................................................... 6 3.2 89C51主控制模块 ...................................................................................... 7 3.2.1 主要特性 ........................................................................................... 8 3.2.2 振荡器特性 ...................................................................................... 8 3.3 SPWM波发生模块 ..................................................................................... 8 3.4 SA4828的引脚功能.................................................................................... 9 3.5 其他模块简介................................................................................................ 9 IV
3.5.1 串口通信 ........................................................................................... 9 3.5.2 驱动模块 ......................................................................................... 10 3.5.3 保护电路 ......................................................................................... 10 3.5.4 A/D模数转换模块 ....................................................................... 11 3.5.5 速度反馈 ......................................................................................... 11 4 系统软件设计 ........................................................................................................... 12 5 结束语 ....................................................................................................................... 14 附录： .............................................................................................................................. 16
