毕业设计（论文）-单片机实现多步进电机控制的设计精选.doc

单片机实现多步进电机控制的设计 专业名称：电子信息科学与技术 作者姓名：邹代好 指导老师：周达琳 摘要：本设计首先介绍了STC89C51单片机、L297、L298N驱动电路及四相四拍步进电机的基本原理与功能，并由这些器件的特点设计了系统组成的基本框架。 整个系统通过单片机内部程序的控制，从I/O口输出控制脉冲，经过L297、L298N驱动电路的处理，输入能直接适合步进电机的控制信号；在此基础上，重新分配I/O资源，同时增加驱动芯片L297、L298N的个数，使能同时控制3台四相四拍步进电机的独立的启停、加速、转向等控制。 关键字：STC89C51单片机； L297；L298; 四相四拍步进电机 Specialty:Electronic information science and technology Author: Daihao Zou Instructs teacher: Dalin Zhou Abstract：This design first introduction the STC89 C51 list slice machine, L297, L298 the N drive electric circuit and four mutually four clap a step into basic principle and function of electrical engineering, and from the characteristics of these spare parts design the system constitute of basic frame. The whole system pass list slice machine inner part procedure of control, from the I/O output control pulse, through L297, L298 the N drive electric circuit of processing, importation ability direct in keeping with step enter electrical engineering of control signal;Reallocate an I/O resources on this foundation, the increment drive the chip L297, L298 N piece in the meantime and make ability in the meantime control 3 set four mutually four clap a step into the electrical engineering of independence of the Qi stop, acceleration, change direction etc. control. Key Words：STC89C51MCU；L297；L298 stepping motor of Four mutually four clap 目录 前言……………………………………………………………………………………………………………1 1 STC89C51单片机的基本性能及特点……………………………………………………………………2 1.1 STC89C51单片机简介 ………………………………………………………………………2 1.1.1 STC89C51单片机的特点 ………………………………………………………………2 1.1.2 STC89C51单片机管脚图…………………………………………………………………3 2 步进电机的的基本原理及特点 ………………………………………………………………………3 2.1 步进电机的特点 ………………………………………………………………………………3 2.2 步进电机起动及加/减速控制方案……………………………………………………………步进电机的换向问题 …………………………………………………………………………3 步进电机的驱动芯片原理 …………………………………………………………………………… 5 3.1 L298N的特点…………………………………………………………………………………… 6 3.2 L297的特点…………………………………………………………………………………… 6 4 基于STC89C51多台步进电机控制的设计………………………………………………