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Patent Searching and Data


Title:
PUMP DRIVING DEVICE AND CONTROL METHOD FOR PUMP DRIVING DEVICE
Document Type and Number:
Japanese Patent JP2004232606
Kind Code:
A
Abstract:

To provide a pump driving device, restraining pressure fluctuation of a pump due to a flow change caused by switching of a piping system and opening and closing of a valve.

This pump driving motor 6 includes a motor control circuit 7 adapted to estimate a theoretical pump head Hth of a fluid flowing a pump chamber 2 from a motor current I and motor rotational frequency ω according to the expression, Hth =Lω2-JI, (L and J are constants peculiar to a rotary blade) and control to restrain fluctuation of pump pressure due to fluctuation of flow rate of a fluid.


Inventors:
Tajima, Masaharu
Application Number:
JP2003000024812
Publication Date:
August 19, 2004
Filing Date:
January 31, 2003
Export Citation:
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Assignee:
SHINANO KENSHI CO LTD
International Classes:
F04D15/00; (IPC1-7): F04D15/00