某综合小区恒压供水系统设计.doc

毕 业 设 计(论文) 题 目： 班 级： 学 号： 姓 名： 指导老师： 二○ 年 月日 摘 要 供水系统生活。传统供水方式占地面积大，水质易污染，基建投资多，而最主要的缺点是水压不能保持恒定，导致部分设备不能正常工作。变频调速技术一种新型成熟的交流电机无极调速技术，它以其独特优良的控制性能被广泛应用于速度控制领域，特别是供水行业中【关键字】 变频器 可编程控制器 PID控制 Abstract With economic development and improvement of national living standards, stability of the domestic water supply system has become an important part of everyday life. Not only covers an area of traditional water supply, water pollution, infrastructure investment, the main disadvantage is that water does not remain constant, resulting in some of the equipment is not working properly.Frequency conversion speed regulating technology as a new mature stepless speed control technology of AC motors, based on its unique quality control performance is widely used for speed control, in particular in the water supply industry. This is to a integrated community of water requirements for theme and expand of to constant pressure water for control way of once design, in determines good to constant pressure water for water programme Hou, full text respectively on constant pressure water of calculation index, and work principle, and system composition and frequency device, and PLC, and PID control of work principle, area for has specific explained, software part is main should have PLC programming technology to eventually implementation the integrated community constant pressure water this a purpose. Key words: Programmable constant-pressure water supply,，frequency converter，Programmable controller ， PID control 目 录 摘 要 2 Abstract 3 第1章 绪论 6 1.1 课题的意义及应用背景 6 1.2 研究内容 7 第2章 恒压供水的原理及系统的技术指标 8 2.1 任务要求 8 2.2 参数分析及方案选定 9 2.2.1 参数分析 9 2.2.2 给水方案选择 11 2.2.3 恒压供水控制系统的选择 11 2.2.4 方案的选定及主要元器件选型 12 2.3 恒压供水的工作原理 13 2.3.1 系统的组成 13 2.3.2 恒压供水的调节 14 2.4 系统组成及工作原理 16 第3章 硬件的原理及运用 17 3 .1 变频器的原理与特性 17 3.1.1 变频器功能简介 17 3.1.2 变频与变压（VVVF）原理 17 3.1.3 变频调速的基本原理 18 3.1.4 变频调速启动、升速和运行 18 3.1.5 变频调速后电机的机械特性 19 3.1.6 森兰SB12S170简介和特性