PLC在变频恒压供水系统中的应用

精品文档---下载后可任意编辑 随着我国社会经济的进展，城市供水系统的建设提出了更高的要求。本文首先阐明了供水系统的变频调速节能原理；其次，分别确定变频器的参数，设计变频主电路、变频电机的运行模式、控制模式及流程；最后，从分析该恒压变频供水的可行性，改造的理论、技术、经济可行性等方面进行多次实验分析。然后归纳和分析了安装运行中的问题和注意事项，提出不同的控制方案。 关键字：恒压；供水系统 ；变频调速；变频器 AbstractAs China's social and economic development, the construction of urban water supply system put forward higher request. This paper firstly expounds the water supply system frequency control energy-saving principle; Secondly, respectively determine frequency converter parameters, the design variable frequency main circuit, frequency conversion motor operating mode, control pattern and procedure; Finally, from the analysis of the constant pressure water supply, the feasibility of variable frequency renovation of the theory, technology, economic feasibility aspects of repeated experiments analysis. Then the summary and analysis the installation of operational problems and precautions, put a different control scheme.Keywords: Constant pressure;Water supply system;Frequency conversion; Inverter 目 录 摘要..................................................I Abstract．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．II第一章 绪论．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．..............1 第一节 引言．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．1 第二节 变频恒压供水产生的背景和意义．．．．．．．．．．．．．．．．．．．．．．．2第三节 变频恒压供水的现况．．．．．．．．．．．．．...．．．．．．．．．．．．．．．．.....31.3.1 国内外变频供水系统现状................................31.3.2 变频...