PWM speed regulation control system of DC motor based on 51 single chip microcomputer (with complete set of data such as Proteus simulation + C program)

Design thinking
DC motor PWM The main functions of the control system include ： It is easy to realize the acceleration of DC motor 、 Deceleration and forward rotation of motor 、 Reverse and emergency stop , And the speed of the motor can be adjusted , It can conveniently realize the intelligent control of motor .

Main circuit ： DC motor PWM Control module . This part of the circuit is mainly composed of AT89C52 Single chip microcomputer I/O port 、 Timing counter 、 External interrupt extension controls the acceleration of DC motor 、 Deceleration and forward and reverse rotation of motor , And the speed of the motor can be adjusted , It can easily realize the intelligent control of motor . In the meantime, through AT89C52 Single chip microcomputer generates pulse signal with adjustable pulse width and inputs it to L298 Driving chip to control the operation of DC motor .

The DC motor PWM The control system consists of the following circuit modules ：
Design input part ： The first mock exam is to use the independent keyboard with interrupt to accelerate the DC motor. 、 Deceleration and forward rotation of motor 、 Reverse and emergency stop control .

Design control part ： Mainly by AT89C52 External interrupt expansion circuit of single chip microcomputer . DC motor PWM The control part is mainly realized by some diodes 、 Motors and L298 Composition of DC motor drive module .

Design display part ：LED Digital display part , Realize to PWM Real time display of PWM duty cycle .

System framework

The principle is ： DC motor PWM Speed regulation system AT89C52 Single chip microcomputer is the control core , By the command input module 、LED Display module and motor drive module . The independent keyboard with interrupt is used as the input of command , Single chip microcomputer under program control , Give regular and constant L298 DC motor drive chip sends PWM wave form ,H Type drive circuit completes the motor timing , Reverse and emergency stop control ; At the same time, the MCU keeps PWM PWM duty cycle LED Nixie tube completes real-time display .

Simulation circuit diagram

The simulation results are as follows

The design content is detailed , cover Single chip microcomputer minimum system design principle ; Key and nixie tube display design ;PWM Speed regulation principle 、 Method and implementation process ;L289 Design principle of motor drive chip ; complete Keil c Program The content such as . Let you know about DC motor PWM The design process of speed control system is clear at a glance .

Resource sharing content

（1） be based on 51 Single chip microcomputer DC motor PWM Speed control system design paper ;
（2）Proteus Simulation file ;
（3）Keil C Language program file ;
（4）L298 Driver chip technical manual and other reference materials ;
（5）Visio The flow chart drawn ;

The screenshot of resources is as follows

Resource acquisition method

Resource acquisition method

Resource acquisition method ！

Because this design is my original design , Get the complete Word Design report 、Proteus Simulation 、Keil C Program 、Visio Flow chart documents and references .

WeChat search for my official account ： Jiaoyuan Xiaozhi