单片机对无刷直流电动机的控制电路设计.doc
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1、单片机对无刷直流电动机的控制电路设计 本科生毕业论文单片机对无刷直流电动机的控制电路设计院系名称姓名学号专业指导教师2015年 04 月22VIVI摘要本课题是讲述无刷直流电机控制系统集电机、逆变电路、检测元件、控制软件和硬件于一体,具有高可靠、高效率、寿命长、调速方便等优点,在电动调速领域有着广泛的应用。电动自行车的发明和使用对解决燃油车造成的严重环境污染和缓解日益突出的能源危机问题有一定的现实意义。根据项目参数要求,采用Microchip公司的PIC16F72单片机作为控制芯片,在硬件方面,进行了电源电路设计、系统硬件保护电路设计、三相全桥逆变电路设计、逆变器驱动电路设计。在软件方面利用汇
2、编语言,采用模块化编程和结构化编程。根据无刷直流电机的控制原理,对系统的控制部分进行了详细分析。利用数字PI控制理论实现电机速度的闭环调制。在系统可靠性方面:设计了系统的欠压、过流和堵转保护。本文还对影响控制器和单片机系统可靠性的因素进行了分析,并且给出了解决方案.本文所设计的无刷电机控制器实现了电动、定速、助力三种工作模式并且在系统出错情况下具有自检功能。保护功能较完善、硬件结构简单、成本较低,具有升级空间,便于用户二次开发。关键词:无刷直流电机,PIC单片机,电动自行车,控制系统AbstractThis thesis is part of the project named the con
3、troller of the Brushless DC Motor for electric-bike. The control system consists of Brushless DC Motor, controlling part, sensor part, hardware and software controlling part. With its unique advantages of high efficiency, high reliability, good control ability and maintenance-free, it is widely used
4、 in many fields. To developth electric-bike will be helpful to solve the pollution problem caused by the waste gas from the gasoline-automobiles and energy sources problems. The task is to design a Brushless DC Motor (BLDCM) control system for electric-bike. According to the project, PIC16F72M CU pr
5、oduced by Microchip Company has been selected. The design of hardware including power circuit, hardware protection circuit, electronic commutate circuit have been carried out. The software was designed following the principle of modularization and structured programming and using assembly as the pro
6、gramme languages. Typical PI controls theory is used to control the speed. Less voltage protection, current excessive protection and wrong angle protection are designed to reinforce the system. Also, factors that affect the reliability of the system are discussed in this paper, and some methods are
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