Title:
PUMP
Document Type and Number:
Japanese Patent JP2006220022
Kind Code:
A
Abstract:
To provide a pump capable of reducing heat generation when a motor generates heat.
A current detection means 9 detecting a value of current carried to the motor 4 and a drive circuit 2 having a switching function turning on and off electricity carry to the motor 4 are provided. When motor current effective value at a cold time of a predetermined section is defined as Ic and motor current effective value at a hot time is defined as Ih, electricity carry to the motor 4 is turned on and off by using the drive circuit 2 to satisfy inequality Ih≤Ic.
Inventors:
UEDA HIDETOSHI
HATSUTORI CHIYOUKEN
IYASAKA MASATOSHI
HATSUTORI CHIYOUKEN
IYASAKA MASATOSHI
Application Number:
JP2005032565A
Publication Date:
August 24, 2006
Filing Date:
February 09, 2005
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
F04D15/00; F04B49/06; F04B49/10; H02P6/12
Domestic Patent References:
| JPH10201280A | 1998-07-31 | |||
| JP2001136788A | 2001-05-18 | |||
| JPH08126369A | 1996-05-17 | |||
| JPH0759254A | 1995-03-03 | |||
| JPH02123995A | 1990-05-11 | |||
| JP2003154952A | 2003-05-27 |
Attorney, Agent or Firm:
Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito
Tomoyasu Sakaguchi
Hiroki Naito