精选优质文档-倾情为你奉上Constant Pressure Water Supply System Based plcAbstract: Based one simple analysis of the methods for water supply used domestically and abroad, this paper discusses the principle and systems structure of automatic water supply system by using frequency conversion speed regulation in detail. Then the systems advantages are discussed and some key problems that should be pay attention to designing are presented.Keyword: Frequency conversion speed regulation; water supply
