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Title:
STATOR CORE AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/025988
Kind Code:
A1
Abstract:
A stator core 220 includes an annular core back portion 221 and a plurality of teeth 222. The plurality of teeth 222 extend in the radial direction from the core back portion 221 toward a rotor magnet containing a plurality of magnets. The ratio of the slot number, which is the number of the plurality of teeth 222, to the pole number, which is the number of magnets in the rotor magnet, is 3:4. In the stator core 220, the slot opening ratio, which is the ratio of the slot opening angle θ2 between two teeth 222 adjacent in the circumferential direction relative to the angle θ1 between the central axes of the two teeth 222, is 0.5 or higher. In addition, with the ratio of the circumferential direction angle of one magnet relative to the angle between the center positions of two magnets adjacent in the circumferential direction in the rotor magnet serving as the magnet ratio, the ratio of the slot opening ratio to the magnet ratio is in the range of 0.6 to 0.7 inclusive.

Inventors:
UEDA,Tomoya (338 Kuzetonoshiro-cho Minami-ku, Kyoto-sh, Kyoto 05, 〒6018205, JP)
MAKINO,Yusuke (338 Kuzetonoshiro-cho Minami-ku, Kyoto-sh, Kyoto 05, 〒6018205, JP)
Application Number:
JP2017/028373
Publication Date:
February 08, 2018
Filing Date:
August 04, 2017
Export Citation:
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Assignee:
NIDEC CORPORATION (338 Kuzetonoshiro-cho, Minami-ku Kyoto-sh, Kyoto 05, 〒6018205, JP)
International Classes:
H02K21/22; H02K1/14
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