Title:
ROTOR FOR ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2012/014728
Kind Code:
A1
Abstract:
A single pole, which is composed of a pair of first permanent magnets positioned in a V-shape that opens toward the outer periphery, and a second permanent magnet positioned parallel in the circumferential direction to the open part of the V-shape, is provided with a plurality of rotor cores that are disposed in a circumferential direction, and the polarity of which alternately change. Among a plurality of pitch lines that connect a rotor shaft center and a plurality of notches that inscribe from the d axis to the q axis of the outer periphery of a rotor core at electrical degree intervals of 1 cycle of a harmonic component of an induced voltage, using an object that exists between a line, which connects a corner on the outer periphery side of a rotor of the second permanent magnet and the rotor shaft center, and the q-axis, as a base point, a groove, having a groove center within a range sandwiched between a position shifted 1/4 of a cycle of a harmonic component in electrical degrees in the d-axis direction from said base point, and a position shifted 1/8 of a cycle of a harmonic component in electrical degrees in the q-axis direction, is formed.
Inventors:
NAKADA, Tohru (())
Application Number:
JP2011/066373
Publication Date:
February 02, 2012
Filing Date:
July 19, 2011
Export Citation:
Assignee:
NISSAN MOTOR CO., LTD. (2 Takara-cho, Kanagawa-ku Yokohama-sh, Kanagawa 23, 〒2210023, JP)
日産自動車株式会社 (〒23 神奈川県横浜市神奈川区宝町２番地 Kanagawa, 〒2210023, JP)
日産自動車株式会社 (〒23 神奈川県横浜市神奈川区宝町２番地 Kanagawa, 〒2210023, JP)
International Classes:
H02K1/27; H02K1/22; H02K21/14
Attorney, Agent or Firm:
GOTO, Masaki (Shoyu-Kaikan, 3-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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Claims:
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