The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9356480 B1

Date of Patent:

May. 31, 2016

Filed:

Feb. 28, 2013

Electric motor having rotor structure for avoiding defect due to strain generated by temperature change, and production method thereof

Applicant:

Fanuc Corporation, Yamanshi, JP;

Inventors:

Akira Yamaguchi, Yamanashi, JP;

Tsuyoshi Furuya, Yamanashi, JP;

Assignee:

FANUC CORPORATION, Yamanashi, JP;

Attorney:

Hauptman Ham, LLP

Primary Examiner:

Burton Mullins

Int. Cl.

CPC ...

H02K 1/28 (2006.01); H02K 1/27 (2006.01); H02K 15/03 (2006.01); H02K 15/12 (2006.01);

U.S. Cl.

CPC ...

H02K 1/28 (2013.01); H02K 1/27 (2013.01); H02K 1/276 (2013.01); H02K 15/03 (2013.01); H02K 15/12 (2013.01);

Abstract

An electric motor having a rotor structure and a production method thereof, wherein a strain due to temperature change does not occur and a manufacturing problem does not occur. Each permanent magnet does not contact each other, and a deformable intervening member is positioned between the end surfaces of the magnets. Intervening member is an elastically or plastically deformable member, and the thickness of the intervening member in the direction of the rotation axis of the rotor is determined so that the neighboring permanent magnets, which are bonded to a rotor core within a manufacturing temperature range of the rotor, do not contact each other at a lower limit of an operating temperature of the electric motor.

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