单片机pwm整流.docVIP

基于单片机控制PWM整流电源的设计 摘 要 本文介绍了用 PWM 实现直流电机调整的基本方法。本文在给出直流电机调整和 PWM 实 现方法的基础上,提供一种用单片机软件实现 PWM 调速的方法,以及直流电机调速的相关知 识和 PWM 调整的基本原理和实现方法.介绍了基于 MCS-51 单片机用软件产生 PWM 信号的途 径，在给出直流电机调整的实现方法的基础上，提供一种用单片机软件实现调速的方法。 系统以 8051 单片机为核心,以小直流电机为控制对象,实现速度单闭环、PID 控制．方便的 人机对话接口,用键盘输入有关控制信号及参数,可以实现电机的启制动、正反转、速度调 节．并在 LED 上实时显示输入参数及动态转速．详细给出调速系统的主电路原理图及各部 分电路原理图，主要包括 MCS-51 电路，电源，键盘和显示电路，驱动电路，最后画出程 序流程图. 关键词：MCS-51；PWM；硬件；直流电机 I ABSTRACT The paper introduces a basic kind of method of DC-motor speed modification based on PWM theory. Showing some relative knowledge upon DC motor speed modification, the PWM theory and the way to implement. It emphasizes on the way for carrying out PWM signals based on MCS-51. Taking 8051 Single Chip Micyoco as core and the little direct current motor as control object, the single closed loop speed control and PID control were realized. In the convenient man-machine interaction interface,the control signal and parameter were inputted with keybaord.so that the start and brake of motor and speed regulation were also realized. Provided main electric circuit principle diagram and each parts of electric circuit principle diagram, mainly include electric circuits MCS-51s, power supplies, keyboard and manifestation electric circuit, drive electric circuit, draw a procedure flow chart finally. Keyword: MCS-51 ；PWM ；Hardware ；DC Motor II 目录摘 要 ..........................................................I ABSTRACT ........................................................II 1 绪论...........................................................1 1.1 课题研究的背景及意义 ........................................1 1.2 PWM 整流电源发展概况 ........................................1 1.3 本课题的来源，研究意义和研究目标 ............................2 2 PWM 整流技术的现状 .............................................3 2.1 PWM 整流研究概述 ............................................3 2.2 PWM 整流的基本原理 ..........................................5 3 核心芯片的选择 ................................................10 3.1 单片机的发展概况 ......................