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Patent Searching and Data


Title:
VARIABLE SPEED SUPPLY WATER DEVICE
Document Type and Number:
Japanese Patent JP2004316434
Kind Code:
A
Abstract:

To correctly conduct control even when highest rotation speed and the level of suction water are unknown in conducting estimated terminal pressure constant control using a cascade pump.

A controller 11 for a motor 4 to drive the cascade pump 2 automatically rewrites a map in accordance with the highest rotation or shutoff pressure by operation so as to determine highest rotation speed, thereby efficient estimated terminal pressure constant control is conducted.


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Inventors:
Kawaguchi, Hitoshi
Isobe, Goji
Makino, Tsutomu
Miki, Ryota
Application Number:
JP2003000107265
Publication Date:
November 11, 2004
Filing Date:
April 11, 2003
Export Citation:
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Assignee:
EBARA CORP
International Classes:
F04D15/00; F04B49/06; (IPC1-7): F04B49/06; F04D15/00