摘 要本论文依照中华人民共和国都市社区供水规定，设计了一套基于 PLC 变频调速恒压供水设备。变频恒压供水设备是一种新型节能供水设备。变频恒压供水设备系运用当今最先进微电脑控制技术，将变频调速器与电机水泵组合而成机电一体化高科技节能供水装置。变频恒压供水设备以水泵出水端水压（或顾客用水流量）为设定参数，通过微机自动控制变频器输出频率从而调节水泵电机转速，实现顾客管网水压闭环调节，使供水系统自动恒稳于设定压力值：即用水量增长时，频率提高，水泵转速加快；用水量减少时，频率减少，水泵转速减慢。这样就保证了整个顾客管网随时均有充分水压（与顾客设定压力一致）和水量（随顾客用水状况变化而变化）。核心词：变频调速；恒压供水；PLCAbstractAccording to the requirements of the Chinese urban community water supply ，this paper designed a set of frequency conversion velocity modulation constant pressure water supply equipment based on PLC. Variable frequency constant pressure water supply equipment is a new type of energy-saving water supply equipment. Variable frequency constant pressure water supply equipment is using today's most advanced microcomputer control technology，will be a combination of frequency converter and motor pump mechanical and electrical integration of high-tech energy-saving water supply device. Variable frequency constant pressure water supply equipment to pump the water side pressure (or user) water flow to set parameters，through the microcomputer automatic control inverter output frequency to adjust the speed of water pump motor ， realize user pipe network pressure closed-loop adjustment ， automatic water supply system ， steady to set pressure value ： the water consumption increases ， the frequency increase，the water pump speed accelerated；Water cut，the frequency is reduced，the pump speed slow. So as to ensure the user's network at any time sufficient water pressure (consistent with the...
