Title:
ROTOR AND MOTOR HAVING SAID ROTOR
Document Type and Number:
WIPO Patent Application WO/2018/216667
Kind Code:
A1
Abstract:
An embodiment of the present invention provides a rotor and a motor having the rotor. The rotor is provided with: a rotation shaft; a nonmagnetic rotational frame; a plurality of yokes divided and disposed within the nonmagnetic rotational frame; and a magnet disposed on at least one of the surfaces of the yokes. In order for the nonmagnetic rotational frame to hold the yokes and the magnet, the rotor comprises: a first ring-like rib disposed along the circumferential direction in the outer perimeter of the rotation shaft; a plurality of radial ribs extending along the radial direction from the outer circumference of the first ring-like rib; and a second ring-like rib being concentric with the first ring-like rib and connected to the radial ribs. The rotor is characterized in that two magnets are disposed on any one of the plurality of yokes, and the two magnets have N-pole and S-pole, respectively, on the side facing a stator. According to the embodiment of the present invention, it is possible not only to reduce the loss due to eddy current to improve the efficiency of the motor, but also to reduce cost by facilitating manufacturing of the rotor.
Inventors:
YAN GUO-JHIH (TW)
LIN HSIU YING (TW)
WU KENG CHANG (TW)
LIN HSIU YING (TW)
WU KENG CHANG (TW)
Application Number:
PCT/JP2018/019560
Publication Date:
November 29, 2018
Filing Date:
May 21, 2018
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K1/27; H02K21/24
Domestic Patent References:
| WO2015159418A1 | 2015-10-22 |
Foreign References:
| JP2010279185A | 2010-12-09 | |||
| JP2011239570A | 2011-11-24 | |||
| JP2007089270A | 2007-04-05 | |||
| US7402934B1 | 2008-07-22 |
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