LINEAR ACTUATOR - MITSUBISHI HEAVY IND LTD

Title:

LINEAR ACTUATOR

Document Type and Number:

WIPO Patent Application WO/2010/053031

Kind Code:

A1

Abstract:

A linear actuator is provided with a coil section and a shaft section. The coil section has a plurality of coils wherein alternating currents in phases different from each other flow. The shaft section passes inside the coils. The shaft section is provided with a plurality of permanent magnets and a plurality of intermediate members. The permanent magnets face each other with opposite magnetization directions with respect to the direction of a center axis (C) and are arranged along the center axis (C). The intermediate members are arranged between the permanent magnets, respectively. In order to lead out each magnetic flux of the permanent magnets to the outside, the intermediate members are composed of a soft magnetic material having a relatively high saturation magnetic flux density or a permanent magnet magnetized in the direction perpendicular to the axis.

Inventors:

HIURA RYOTA (JP)
NOZAWA TAKAKATSU (JP)
HIRATA KATSUHIRO (JP)
ISHIGURO HIROSHI (JP)
NAKATA YOSHIHIRO (JP)

Application Number:

PCT/JP2009/068511

Publication Date:

May 14, 2010

Filing Date:

October 28, 2009

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)
UNIV OSAKA (JP)
HIURA RYOTA (JP)
NOZAWA TAKAKATSU (JP)
HIRATA KATSUHIRO (JP)
ISHIGURO HIROSHI (JP)
NAKATA YOSHIHIRO (JP)

International Classes:

H02K41/03

Domestic Patent References:

WO2006035835A1	2006-04-06
WO2008013053A1	2008-01-31

Foreign References:

JP2001008430A	2001-01-12
JP2007006545A	2007-01-11
JP2008193760A	2008-08-21
JP2003070226A	2003-03-07
JP2007006545A	2007-01-11
JP2008284380A	2008-11-27

Other References: