BRUSHLESS MOTOR - MITSUBA CORP

Title:

BRUSHLESS MOTOR

Document Type and Number:

WIPO Patent Application WO/2015/019948

Kind Code:

A1

Abstract:

A brushless motor (1) has the following: a stator (2) provided with a stator core (5) in which a plurality of stator core plates (17) are stacked; and a rotor (3) provided with a rotor core (15) in which a plurality of rotor core plates (18) are stacked. The rotor core (15) has a core main body (15a), a magnet attachment hole (31) in which a magnet (16) is accommodated, and a salient pole section (32) formed on the outer circumferential side of the magnet attachment hole (31). The axial direction length (Lr) of the rotor core (15) is longer than the axial direction (Lm) of the magnet (16) (Lr>Lm), and a first overhang portion (41) is formed at both ends of the rotor core (15). The axial direction length (Ls) of the stator core (5) is longer than the axial direction length (Lr) of the rotor core (15) (Ls>Lr), and a second overhang portion (42) is formed at both ends of the stator core (5).　　

Inventors:

OKUBO MASAYUKI (JP)
OGIHARA SHIGERU (JP)
UCHIDATE TAKAHIRO (JP)

Application Number:

PCT/JP2014/070311

Publication Date:

February 12, 2015

Filing Date:

August 01, 2014

Export Citation:

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Assignee:

MITSUBA CORP (JP)

International Classes:

H02K21/16

Foreign References:

JP2004194489A	2004-07-08
JPH11234931A	1999-08-27
JP2010051150A	2010-03-04
JP2010045873A	2010-02-25
JP2012120326A	2012-06-21
JP2008160931A	2008-07-10
JP2010051150A	2010-03-04

Other References: