Design and Research of Speed Control System for DC Motor

为了提升电机的调速控速能力，本文提出一种基于单片机的直流电机无极调速控制方案。以STC89C52单片机为核心，结合L298N、ADC0832、LCD1602、霍尔传感器等器件，实现电机PWM无级调速、正反转、启停、测速及速度显示功能。本次设计经过系统设计、硬件搭建、软件编程、仿真调试等过程，最终实现本次设计。此次设计的电机调速精度高，成本较低，控制灵活，可满足多种应用场景需求，为直流电机调速控制提供了高效方案。In order to enhance the speed regulation and control ability of the motor, this paper proposes a stepless speed regulation control scheme for DC motors based on a single-chip microcomputer. Taking the STC89C52 single-chip microcomputer as the core, and combining devices such as the L298N, ADC0832, LCD1602, and Hall sensors, it realizes functions such as PWM stepless speed regulation, forward and reverse rotation, start and stop, speed measurement, and speed display of the motor. This design goes through processes such as system design, hardware construction, software programming, and simulation debugging, and finally achieves the goal of this design. The motor in this design has high speed regulation accuracy, low cost, and flexible control, which can meet the requirements of various application scenarios and provides an efficient solution for the speed regulation control of DC motors.