Title:
ELECTROMAGNETIC STEEL SHEET, ROTOR CORE, ROTOR AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2019/123949
Kind Code:
A1
Abstract:
This electromagnetic steel sheet is stacked along a center axis and constitutes a rotor core of an inner-rotor type motor. The electromagnetic steel sheet is provided with: a central hole centered on the center axis; and a plurality of through-holes that pass through in the axial direction and are arranged in the circumferential direction. The plurality of through-holes include at least two first through-holes and at least one second through-hole positioned between two of the first through-holes in the circumferential direction. The edge on one circumferential side of a first through-hole and the edge on the one circumferential side of the second through-hole are positioned on a single virtual circle centered on the center axis. The angle, with respect to the central axis, between the edge on one circumferential side of the first through-hole and the edge on one circumferential side of the second through-hole on one side differs from the angle between the edge on one circumferential side of the first through-hole and the edge on one circumferential side of the second through-hole on the other side.
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Inventors:
IGA TOMOKI (JP)
Application Number:
PCT/JP2018/042829
Publication Date:
June 27, 2019
Filing Date:
November 20, 2018
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K1/22; H02K1/27
Foreign References:
| JP2012050253A | 2012-03-08 | |||
| JP2003032939A | 2003-01-31 | |||
| JP2010252418A | 2010-11-04 | |||
| JP2008182798A | 2008-08-07 | |||
| JP2012060774A | 2012-03-22 |
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