基于单片机的机车功率恒定控制系统设计  

作　　者：闫璞[1] 

机构地区：[1]兰州理工大学技术工程学院,甘肃兰州730050

出　　处：《中国新技术新产品》2018年第22期1-4,共4页New Technology & New Products of China

基　　金：兰州理工大学技术工程学院2018年教育教学研究项目

摘　　要：本文基于AT89C52单片机技术设计了的机车功率恒定控制系统。采用双闭环控制调节励磁电流,使机车能够始终运行在经济特性曲线上。霍尔传感器检测电流信号,然后转换为电压信号。ADC0808模数转换器对信号进行采样和模数转换。通过键盘输入电流和电压的给定值。隔离放大器能有效提高系统抗干扰性能。执行环节的功率场效应管,简化了驱动电路,提高了可靠性。系统软件采用模块化的设计结构,包括:主程序、采样子程序、运算子程序、键盘输入和液晶显示子程序。A locomotive constant power control system(LCPCS)was designed based on AT89C52 microcomputer on a single chip(MSC)in this paper.The double-loop control mode was adopted to make the locomotive run along the curve of economic characteristic by adjusting the excitation current.The current was detected with Hall sensor,and converted into voltage signal.The signal was sampled and converted into digital one by ADC0808 analog-to-digital converter.The given values of current and voltage were input through a determinant keyboard.The performance of interference resistant of the system was effectively improved by designing an insulation amplifier.The use of power field effect transistor simplifies the driving circuit,and improves its reliability.The system software was designed with modularity,including main program,sampling,operation,keyboard input and displaying subroutines.

关 键 词：功率恒定控制 单片机 PI算法 内燃机车 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TK422[自动化与计算机技术—计算机科学与技术]