文档介绍：高等教育本科毕业论文
基于单片机电动自行车调速系统的设计
专业层次: 本科院(系):机械与动力工程学院
aaaaa学院
高等教育自学考试本科毕业论文
基于单片机电动自行车调速系统的设计
考生姓名: aaaaaaaaaaa
准考证号: aaaaaaaaaaaaa
专业层次: 本科
指导教师: aaaaaaaaaaaaaa
院(系):aaaaaaaaaaaaaaaa
aaaaaaa学院
二Oaaa年a月aaa日
整个论文页面设置不完全符合规范。
摘要
近年来,随着人们生活水平的改善,摩托车、燃油助力车得到迅速发展,其排放的尾气已造成城市空气严重污染,一些城市相继制定法规限制摩托车、燃油助力车的使用来保护环境。发展短距离绿色交通工具替代摩托车、燃油助力车成为一些国家的经济和社会课题。
电动自行车具有“零排放”,是一种比较好的短距离绿色交通工具。由于电池问题,限制了电动自行车的行驶距离,但可以通过提高系统的效率来改善其性能。
本课题研制的电动自行车用无位置传感器直流无刷永磁电动机来驱动,用PIC16C74单片机作为主控芯片,它不仅克服了有刷直流电机的噪音、换向火花等缺点,而且避免了有位置传感器直流无刷电机因位置传感器带来的不足;同时,它降低了制造和使用过程中的成本,提高了使用和维护的方便性,具有效率高、环保、经济和方便的特点以及具有良好运行性能和巨大的市场潜力。
关键词:单片机,脉宽调速系统,三端式稳压器,无刷直流电动机,八段数码管动态显示,蓄电池(关键词不完全准确,只需3-5个)
Electric bike speed control system design
ABSTRACT
In recent years, with the improvement of people's living standard, motorcycle, fuel ZhuLiChe rapidly developing, the exhaust gas has caused urban air pollution, and some cities have set rules to limit the use of motorcycle, fuel ZhuLiChe to protect the environment. The development of green transportation short alternative motorcycle, fuel ZhuLiChe e some the country's economic and social issues.
This paper deals with an electric motor driven bike (EB) and its control stratagem. Without fail,EB 15 very helpful to environment protection. Nevertheless EB has its disadvantages,especially the too weak continuous run distance. Except the battery problem,the efficiency of the whole system 15 also one of the most important problems to be solved.
A permanent brush-less and sensor-less DC motor and its control set are specially designed for this developed study on control stratagem and electronic resorts are given in this paper. A microchip PIC16C74 used as CPU and corresponding software developed by author 15 introduced in this control system. The experiments of the prototype show that the performance,including system efficiency,noise,spark,maintenance-free and its cost are obviously improved. It may be expected,that this EB driving system has really huge mar