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Patent Searching and Data


Title:
WATER SUPPLY EQUIPMENT AND ITS CONTROL METHOD
Document Type and Number:
Japanese Patent JP3558627
Kind Code:
B
Abstract:

PROBLEM TO BE SOLVED: To provide water supply equipment and its control method that prevents the drop and the fluctuation of supply water pressure, in a retrial action when a protective action of a pump motor works.
SOLUTION: This equipment is provides with: a plurality of pump motors 1, 2; a drive circuit to drive each pump motor 1, 2; a protective device 3, 4 of the drive circuit to work protective action by detecting abnormality; a memory section 9 that memorizes the occurrence of protective action; and a control unit 10 that selects the pump motor to be actuated among plural pump motors. The control unit 10 changes the operation to other pump motor from the said pump motor when the protective action occurs and decides the control thereafter based on the memory of the memory section 9 about the pump motor which the protective action acts on.


Inventors:
Tateishi, Kazufumi
Application Number:
JP2003000045187
Publication Date:
May 28, 2004
Filing Date:
February 03, 1995
Export Citation:
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Assignee:
EBARA CORP
International Classes:
F04D15/00; F04B49/06; F04D15/02; F04D15/00; F04B49/06; F04D15/02; (IPC1-7): F04B49/06; F04D15/00; F04D15/02