I. Application of DC Motor Controlled by Single Chip Microcomputer
DC motor has been widely used in transportation, machinery, textile, aviation and other fields. In the past, the control of DC motor is only simple. It is difficult for DC motor to adjust speed, and DC motor can not realize intellectualization.
2. Basic Principle of DC Motor Controlled by Single Chip Microcomputer
The main circuit of DC motor is the PWM control module of DC motor. This part of DC motor circuit is mainly controlled by I/O port of STC89C52 microcontroller, timing counter, external interruption expansion, etc. DC motor acceleration, deceleration and motor forward and reverse, and DC motor can adjust the speed of motor, DC motor can also easily read the speed of motor and understand the direction of motor, DC motor can easily realize electricity. Intelligent control of the machine.
DC motor generates pulse width modulation signal through STC89C52 single chip computer and inputs it to L298 driver chip to control DC motor. The DC motor control system consists of the following circuit modules: DC motor design input part: DC motor module is mainly realized by using an independent keyboard with interruption.
DC motor design and control part: DC motor is mainly composed of STC89C52 MCU external interrupt expansion circuit. DC motor design display part: DC motor includes LED digital display part. The digital display part of DC motor consists of four 8-bit digital tube display modules. DC motor PWM control realization part: DC motor mainly consists of some diodes, motors and LM298 DC motor drive module.
