公开(公告)号：US20240333098A1

公开(公告)日：2024-10-03

申请号：US18621098

申请日：2024-03-29

Applicant: NIDEC CORPORATION

Inventor： Kosuke OGAWA ,  Shuji IWASAKI ,  Masami SUGINO ,  Yuki YANAGITA

IPC: H02K9/06 ,  H02K1/276

CPC classification number: H02K9/06 ,  H02K1/276

Abstract: A rotor includes: a rotor core having first and second vent holes penetrating in an axial direction; and a fan disposed to face at least one end surface on an axial side of the rotor core, and having an outflow path connected to the first vent hole and an inflow path connected to the second vent hole. The fan includes a first surface facing the end surface, an outer surface positioned radially outside the first surface, and a first recess portion in the first surface and axially overlapping the first vent hole. The first recess portion includes a first opening portion opening to the outer surface. At least a part of the outflow path is surrounded by the end surface and the first recess portion. A cross-sectional area of the outflow path in the first opening portion is smaller than a minimum cross-sectional area of the inflow path.

公开(公告)号：US20220060078A1

公开(公告)日：2022-02-24

申请号：US17400114

申请日：2021-08-12

Applicant: NIDEC CORPORATION

Inventor： Yuki ISHIKAWA ,  Masami SUGINO

IPC: H02K5/10 ,  H02K5/20 ,  H02K9/19 ,  H02K5/173

Abstract: In a motor, a motor housing includes a motor housing main body having a cylindrical portion and a lid portion holding a first bearing, a cover holding a second bearing, a stator housing forming a radial flow path, first and second seal members, and a positioning portion for radially positioning the motor housing main body and the cover. The stator housing includes a stator housing main body and a flange portion positioned between the motor housing main body and the cover in the axial direction. The first seal member seals a gap in the radial direction between the cylindrical portion and the stator housing main body. The second seal member seals a gap in the axial direction between the motor housing main body and the flange portion. The positioning portion positions the stator housing in the radial direction with respect to the motor housing main body and the cover.