Pump system and method for operating the same

专利名称：Pump system and method for operating the

same

发明人：Murai, Yukio,Toguchi, Seiichi申请号：EP94104966.0申请日：19940329公开号：EP0619431A1公开日：19941012

专利附图：

摘要：A pump system comprising a pump having a centrifugal impeller driven by anelectric motor, a pair of upper and lower float switches for detecting a high water levelHWL and a low water level LWL, respectively, a controller for outputting a control signal

on the basis of preset rotational speeds for low and high-speed operations and a presetrotational speed increment rate, together with output signals from the upper and lowerfloat switches, and a frequency converter for varying the rotational speed of the electricmotor on the basis of the control signal from the controller, the pump system is capableof exhibiting the required pumping performance and of controlling the flow rate and thepump head.

申请人：EBARA CORPORATION

地址：11-1, Haneda Asahi-cho Ohta-ku, Tokyo JP

国籍：JP

代理机构：Geyer, Ulrich F., Dr. Dipl.-Phys.

更多信息请下载全文后查看