《基于C8051F340的空压机电机保护系统的设计》-毕业论文.doc

摘要 空压机电机是煤矿安全生产中的一个重要设备，对其进行可靠有效的保护尤为关键。本文介绍了一种用单片机控制的电机保护器的实现方法。 该保护器在电机保护理论上，以电流和电压等为判据；在硬件实现上，以高档51系列单片机C8051F340为核心，外接中文液晶显示器等外设；在数据采集上，使用C8051F340内部集成的AD转换器对采集到的模拟信号进行A/D转换。该电机保护器具有中文显示、菜单式操作、历史故障数据存储、参数调整简单灵活、保护功能完善等特点。另外，将可靠性高、结构简单的RS-485总线运用于电机保护，为电机智能保护网络的组建提供了硬件基础。 关键词: 电机保护器，单片机，液晶显示，485总线 ABSTRACT The electromotor of air compressor is an important equipment in the safe production of coal mine, so it is crucial to provide reliable and effective protection for electromotor. The design of singlechip-control protector for electromotor is introduced in this paper. In theory, the protector is based on current , voltage and other protection criterions; in hardware realization, a powerful processor in 51 series- C8051F340 is installed as the core of protector system, and some peripheral equipment like LCD displaying Chinese is also installed in this system; for data collection, the A/D transformation is carried out by the ADC which is integrated in the processor- C8051F340. The protector has the following characteristics, such as displaying in Chinese, menu-guided operation, storage of foregone fault data, simple and flexible parameter setting, perfect protection function and so on. Furthermore, RS-485 Bus that has high reliability and simple framework is applied to the electromotor protector, and it is the hardware base of the intelligent electromotor protection network. Key words: The protector of electromotor, singlechip , LCD, 485 Bus 目 录 TOC \o 1-2 \h \z \u HYPERLINK \l _Toc170006876 1 绪论 PAGEREF _Toc170006876 \h 1 HYPERLINK \l _Toc170006877 1.1 课题的提出及意义 PAGEREF _Toc170006877 \h 1 HYPERLINK \l _Toc170006878 1.2 电机保护器的发展历程及其现状 PAGEREF _Toc170006878 \h 1 HYPERLINK \l _Toc170006879 1.3 课题的研究内容及特点 PAGEREF _Toc170006879 \h 4 HYPERLINK \l _Toc170006880 2 电机保护器的方案设计 PAGEREF _Toc170006880 \h 6 HYPERLINK \l _Toc170006881 2.1 系统的总体设计 PAGEREF _Toc170006881 \h 6 HYPERLINK \l _Toc170006882 2.2 方案的选择 PAGEREF _Toc170006882 \h 7 HYPERLINK \l _Toc