DC BRUSHLESS MOTOR AND METHOD FOR CONTROLLING SAME

Title:

DC BRUSHLESS MOTOR AND METHOD FOR CONTROLLING SAME

Document Type and Number:

WIPO Patent Application WO/2012/073446

Kind Code:

A1

Abstract:

This DC brushless motor (1) is provided with a stator (2) that has exciting coils (31, 32) and a rotor (4) that is positioned coaxially to the stator (2). The stator (2) has a quasi-E-shaped cross-section in the axial direction at the radius part; a plurality of protrusions (212, 222, 232) serving as magnetic poles are formed on the respective 3 parallel sections (211, 221, 231) of the E in the same number in the circumferential direction; and of the magnetic poles (212, 222, 232) formed at the 3 parallel sections (211, 221, 231) of the E, the top and the bottom magnetic poles (212, 232) are respectively positioned so as to be shifted in the opposite directions in the circumferential direction with respect to the center line of the middle magnetic pole (222). Changes in the magnetic resistance between the stator (2) and the rotor (4), which are caused by the flow of a magnetic flux generated around the exciting coils (31, 32), are utilized as a driving force. The DC brushless motor (1) configured in said manner exhibits excellent space efficiency at low cost and is less affected by temperature changes.

Inventors:

TSUTSUI AKIRA
INOUE KENICHI
ZAITSU KYOJI

Application Number:

PCT/JP2011/006433

Publication Date:

June 07, 2012

Filing Date:

November 18, 2011

Export Citation:

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Assignee:

KOBE STEEL LTD (JP)
TSUTSUI AKIRA
INOUE KENICHI
ZAITSU KYOJI

International Classes:

H02K19/10; H02K1/02; H02K1/14; H02K1/24; H02P6/06; H02P6/08; H02P6/15

Domestic Patent References:

WO2006126552A1	2006-11-30
WO2009136574A1	2009-11-12

Foreign References:

JPS5133715U	1976-03-12
JP2010193700A	2010-09-02
JP2001057762A	2001-02-27
JP2009043776A	2009-02-26
JP2006333545A	2006-12-07
JP2007032573A	2007-02-08
JP2009142086A	2009-06-25
JP2010268396A	2010-12-01

Other References: