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Title:
ROTOR FOR ROTATING ELECTRICAL MACHINE, ROTATING ELECTRICAL MACHINE USING SAID ROTOR, AND ELECTRIC VEHICLE
Document Type and Number:
WIPO Patent Application WO/2015/111297
Kind Code:
A1
Abstract:
Provided are a rotor for a rotating electrical machine, a rotating electrical machine in which the rotor is used, and an electric vehicle. The rotor is adaptable to high-speed rotation and is capable of providing the effect of reducing electromagnetic vibration noise even with large stack thicknesses. A rotor (10) of an embedded-magnet rotating electrical machine having N poles, wherein: magnetic gaps (201) provided independently from magnet insertion holes (302) are provided on the surface or in the interior of a rotor piece; the magnetic gaps are provided so as to be asymmetrical about the d-axis and symmetrical about the q axis, symmetrical about the d-axis and asymmetrical about the q axis, or asymmetrical about the d-axis and asymmetrical about the q axis so as to have a periodicity of 2/N; and a configuration is obtained by stacking k rotor piece units (101-1, 101-2) (where k is an integer equal to or greater than 2) stacked so that the axial lengths of the rotor pieces are at a ratio of 1:2:1, or stacking k rotor piece units (where k is an integer equal to or greater than 1) stacked so that the axial lengths of the rotor pieces are at a ratio of 1:2:2:1, so that the circumferential positions of the magnetic gaps of adjacent rotor pieces (11a, 11b) are displaced by one pole.

Inventors:
NEMOTO Kanako (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
KOKA Hidetoshi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
SAITO Yasuyuki (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
MATSUNOBU Yutaka (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2014/081134
Publication Date:
July 30, 2015
Filing Date:
November 26, 2014
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
H02K1/22; H02K1/27; H02K21/14
Foreign References:
JP2013150437A2013-08-01
JP2011142735A2011-07-21
JP2009303447A2009-12-24
JP2008029095A2008-02-07
Attorney, Agent or Firm:
INOUE Manabu et al. (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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