ROTOR FOR ELECTRIC MOTOR

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:

PCT/JP2011/066373

Publication Date:

February 02, 2012

Filing Date:

July 19, 2011

Export Citation:

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Assignee:

NISSAN MOTOR (JP)
NAKADA TOHRU

International Classes:

H02K1/27; H02K1/22; H02K21/14

Domestic Patent References:

WO2008150035A1

2008-12-11

Foreign References:

JP2004328956A	2004-11-18
JP2008206308A	2008-09-04
JP2006314152A	2006-11-16
JP2006014457A	2006-01-12
JP2004328956A	2004-11-18
JP2010168050A	2010-07-27

Other References: