CYLINDRICAL LINEAR MOTOR

Title:

CYLINDRICAL LINEAR MOTOR

Document Type and Number:

WIPO Patent Application WO/2019/130646

Kind Code:

A1

Abstract:

In order to achieve the purposes, this cylindrical linear motor (1) is provided with: a core (2) which has a cylindrical yoke (3) and a plurality of teeth having annular shapes and provided on the outer circumference of the yoke (3) so as to be spaced apart from each other in an axial direction; a winding (5) mounted in slots between teeth (4), (4); and a field magnet (7) which has a cylindrical shape, into which the core (2) is inserted to be axially movable, and in which N poles and S poles are alternately arranged in the axial direction, wherein the field magnet (7) has permanent magnets (10a) of main magnetic poles which are radially magnetized, and permanent magnets (10b) of sub magnetic poles which are axially magnetized, the permanent magnets (10a) and permanent magnets (10b) being alternately arranged side-by-side in the axial direction in a Halbach array, and the axial lengths of the permanent magnets (10a) of the main magnetic pole are longer than the axial lengths of the permanent magnets (10b) of the sub magnetic poles, and the permanent magnets (10b) of the sub magnetic poles have higher coercive forces than the permanent magnets (10a) of the main magnetic poles.

Inventors:

KANO YOSHIAKI (JP)
SATOU KOUSUKE (JP)
HAKAMADA SHINICHIROU (JP)

Application Number:

PCT/JP2018/030278

Publication Date:

July 04, 2019

Filing Date:

August 14, 2018

Export Citation:

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Assignee:

KYB CORP (JP)

International Classes:

H02K41/03

Foreign References:

JP2013106458A	2013-05-30
JP2010136516A	2010-06-17
JP2003134790A	2003-05-09
JP2016152668A	2016-08-22
JP2007019127A	2007-01-25
JP2017253631A	2017-12-28

Other References: