公开(公告)号：US20240213838A1

公开(公告)日：2024-06-27

申请号：US18457344

申请日：2023-08-29

Applicant: NIDEC CORPORATION

Inventor： Ippei YAMASAKI

IPC: H02K1/32 ,  H02K1/276

CPC classification number: H02K1/32 ,  H02K1/276 ,  B60K1/00

Abstract: The present invention is a rotor rotatable about a center axis, and includes a rotor core having a plurality of magnet holes and a flow path through which a refrigerant flows, and a plurality of magnets accommodated in each of the plurality of magnet holes. The plurality of magnet holes and the flow path each extend in the axial direction. In a cross section orthogonal to the center axis, the flow path is surrounded by a plurality of magnets. The thermal resistance between the first outer surface facing the opposite side to the flow path side of each of the plurality of magnets and the rotor core is larger than the thermal resistance between the second outer surface facing the flow path side of each of the plurality of magnets and the rotor core.

公开(公告)号：US20240213833A1

公开(公告)日：2024-06-27

申请号：US18458119

申请日：2023-08-29

Applicant: NIDEC CORPORATION

Inventor： Ippei YAMASAKI

IPC: H02K1/276 ,  H02K7/116

CPC classification number: H02K1/276 ,  H02K7/116

Abstract: The present invention is a rotor rotatable about a center axis, and includes a rotor core having a first magnet hole extending in an axial direction, a first magnet accommodated in the first magnet hole, and a low thermal conductive layer provided between a first outer surface of the first magnet facing radially outside and the rotor core. The low thermal conductive layer includes a low thermal conductive portion that is in contact with the first outer surface of the first magnet and the rotor core, and a void portion. The second outer surface of the first magnet facing radially inside is in contact with the rotor core. The thermal conductivity of the low thermal conductive portion is smaller than the thermal conductivity of the rotor core. A part of the first outer surface is exposed to the void portion.

公开(公告)号：US20230412019A1

公开(公告)日：2023-12-21

申请号：US18037695

申请日：2021-06-11

Applicant: Nidec Corporation

Inventor： Yusuke MAKINO ,  Satoshi KAJIKAWA ,  Ippei YAMASAKI

IPC: H02K1/276 ,  H02K1/32 ,  H02K9/19

CPC classification number: H02K1/276 ,  H02K1/32 ,  H02K9/19 ,  H02K29/03

Abstract: A rotating electric machine includes a rotor rotatable about a central axis, and a stator positioned radially outside the rotor. The rotor includes a shaft axially extending about the central axis, rotor core portions fixed to an outer peripheral surface of the shaft and in an axial direction, a magnet held by each of the rotor core portions, and at least one spacer that is a non-magnetic body with a ring-plate shape about the central axis and is between the rotor core portions which are axially adjacent to each other. The spacer is smaller in outer diameter than the rotor core portion.