PUMP - PANASONIC ELEC WORKS CO LTD

Title:

PUMP

Document Type and Number:

WIPO Patent Application WO/2010/134576

Kind Code:

A1

Abstract:

Disclosed is a pump provided with a rotor and a stator. The rotor rotates as a result of a magnetic field generated by the stator. The rotor has an impeller and a permanent magnet. The rotor has an axial direction, a circumferential direction, and a radial direction. The rotor has a through-hole along the axial direction. The permanent magnet is a bonded magnet, and thus has a weld line going from the inside to the outside in the radial direction. The permanent magnet also has a plurality of magnetic poles arranged along the circumferential direction. There are boundary planes between adjacent magnetic poles. The through-hole is offset in the circumferential direction from the weld line and the boundary planes.

Inventors:

TOKUNAGA RYOHEI (JP)
HIRATA MASAHIRO (JP)

Application Number:

PCT/JP2010/058548

Publication Date:

November 25, 2010

Filing Date:

May 20, 2010

Export Citation:

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Assignee:

PANASONIC ELEC WORKS CO LTD (JP)
TOKUNAGA RYOHEI (JP)
HIRATA MASAHIRO (JP)

International Classes:

F04D13/06; F04D29/58

Foreign References:

JP2007032370A	2007-02-08
US20040037719A1	2004-02-26
US20070243086A1	2007-10-18
JP2006200427A	2006-08-03
JP2008172965A	2008-07-24

Other References: