1、 毕业论文(设计)毕业论文(设计) 变频调速恒压供水控制系统的设计 The Design of Variable-frequency Governing System with the Constant Pressure Water Supply 姓 名 学 号: 系 别: 物 电 系 专 业: 电子信息科学与技术 年 级: 指导教师: 摘要摘要 随着社会经济的迅速发展, 人们对供水质量和供水系统可靠性的要求不断提 高;再加上目前能源紧缺,利用先进的自动化技术、控制技术以及通讯技术,设 计高性能、高节能、能适应不同领域的恒压供水系统成为必然趋势。 本设计首先根据管网和水泵的运行特性曲线, 阐明
2、了供水系统的变频调速节 能原理。接着分析了变频恒压供水的原理及系统的组成结构,提出不同的控制方 案,通过研究和比较,采用变频器和PLC实现恒压供水和数据传输。然后用PID 对系统中的恒压控制器进行设计,最后对系统的软硬件设计进行了详细的介绍, 该变频恒压供水系统可运用于许多实际的供水控制系统中, 并能够取得稳定可靠 的运行效果和良好的节能效果。 关键词:变频调速;恒压供水;PLC Abstract With the rapid development of social economy, it demands the better of water supply s quality and r
3、eliability of water supply system. Meanwhile energy resources are seriously lack. So it is inevitable tendency to design water supply system which has high function and saves on energy well, with help of advanced technique of automation, control and communication. At the same time this system can ad
4、apt different water supply fields. This design explains water supply systems energy-saving principle of pump of speed control according to characteristic curve of running pipelines and water pump, analyzes the structure of VF speed regulating constant pressure water supply and gives several control methods whose features are researched and compared in this design. On the basis of above PLC and inverter s method fits water supply system and data t