VARIABLE SPEED SUPPLY WATER DEVICE

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:

JP2003107265A

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

Attorney, Agent or Firm:

Toshitada Takahashi
Toshikuni Takahashi

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