基于PWM的电动机转速智能控制系统的设计与实现  

Design and implementation of intelligence control system for motor speed based on PWM

作　　者：张新荣[1] 

机构地区：[1]淮阴工学院电子与电气工程学院,江苏淮安223003

出　　处：《矿山机械》2012年第1期121-124,共4页Mining & Processing Equipment

基　　金：淮安市科技支撑计划项目(SN1045);淮阴工学院科研基金项目(HGB1010)

摘　　要：针对直流电动机转速高精度智能控制的实际需求,以AT89C51单片机为核心,采用传感器与定时器、计数器配合测速,用光电码盘产生脉冲,将电动机每转一圈所测的信号转换成矩形脉冲波,控制定时器、计数器计算得出的电动机转速,经PID算法得出控制量发送给从单片机,产生PWM波,从而形成高精度闭环控制,实现基于脉宽调制的高精度直流电动机转速控制。通过对PWM调制信号进行调试,产生良好的调制信号驱动电动机,实现电动机转速高精度控制。该装置多用于转速要求精确的电器产品,它稳定性好、精度高且操作简单,符合现代工业化、家庭化产品的需要。In view of high precision of intelligent control system for DC motor speed,MCU AT89C51 served as the core,and sensors were combined with timer or counter to measure the speed.The photoelectric encoder produced pulses,and the signals measured per revolution of the motor were converted into rectangular pulses to control the timer or the counter,so as to calculate the motor speed.And then the control amount derived from PID algorithm was sent to the slave MCU to generate PWM waves.Thus high precision closed-circuit control for DC motor speed was achieved based on pulse width modulation.Through debugging the PWM modulation signals,premium modulation signals could be produced to drive motor and to realize the high precision control for the motor speed.The device has the properties of high stability,high precision and simple operation,which is in line with the needs of present industrial,household products and will be used in electrical products requiring precise rotary speed.

关 键 词：单片微型计算机 直流电动机 智能控制 PWM 

分 类 号：TM301.2[电气工程—电机]