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.

公开(公告)号：US20190181722A1

公开(公告)日：2019-06-13

申请号：US16321514

申请日：2017-08-04

Applicant: Nidec Corporation

Inventor： Satoshi KAJIKAWA ,  Yusuke MAKINO

IPC: H02K9/06 ,  H02K5/20 ,  H02K5/22 ,  H02K7/00 ,  H02K7/08 ,  H02K11/215 ,  H02K21/22

Abstract: A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing rotatably supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a disk-shaped rotor lid portion connected to the shaft, and a rotor side wall portion extending downward from an outer edge of the rotor lid portion. The shaft is made of metal. The rotor lid portion and the rotor side wall portion are made of resin. The rotor lid portion and the shaft are an integrally molded article.

公开(公告)号：US20190178261A1

公开(公告)日：2019-06-13

申请号：US16321511

申请日：2017-08-04

Applicant: Nidec Corporation

Inventor： Satoshi KAJIKAWA ,  Tomoya UEDA ,  Yusuke MAKINO

IPC: F04D29/58 ,  F04D29/70 ,  H02K5/22 ,  H02K7/08 ,  H02K7/14 ,  H02K9/06 ,  H02K11/215 ,  H02K21/22

Abstract: A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a rotor lid portion connected to the shaft, a rotor side wall portion extending downward from an outer edge of the rotor lid portion, a blower plate portion connected to a lower surface of the rotor lid portion and extending radially outward from a center portion of the rotor lid portion, an inlet disposed radially outward of the cylindrical portion and penetrating the bracket, and an outlet disposed radially outward of the blower plate portion and radially penetrating the rotor.

公开(公告)号：US20190165642A1

公开(公告)日：2019-05-30

申请号：US16321512

申请日：2017-08-04

Applicant: Nidec Corporation

Inventor： Satoshi KAJIKAWA ,  Yusuke MAKINO

IPC: H02K5/22 ,  H02K3/50 ,  H02K5/173 ,  H02K9/06

Abstract: A motor includes a shaft, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, a covered cylindrical rotor connected to the shaft, and a bus bar unit. The armature includes a core back, teeth extending radially outward from the core back portion, an insulator covering surfaces of the teeth, and a coils defined by a wire wound from above the insulator round the teeth. The bus bar unit includes bus bars to which the coils are connected, a bus bar holder holding the bus bars, and a bus bar cover covering portion of the bus bars.

公开(公告)号：US20190052150A1

公开(公告)日：2019-02-14

申请号：US16053846

申请日：2018-08-03

Applicant: Nidec Corporation

Inventor： Yusuke MAKINO ,  Satoshi KAJIKAWA

IPC: H02K9/06 ,  H02K5/16 ,  H02K7/08 ,  H02K5/22

Abstract: A motor includes a shaft with a central axis along an up and down direction as a center, a bearing mechanism rotatably supporting the shaft; a cylindrical rotor main body fixed to the shaft; a rotor fan fixed to the shaft at an upper side of the rotor main body; an armature facing the rotor main body in a radial direction; and a housing accommodating the rotor main body, the rotor fan, and the armature therein. The bearing mechanism includes a first bearing above the rotor fan in the housing and facing the rotor fan in the up and down direction and a second bearing positioned below the rotor main body. The housing includes a first opening, a second opening, and a bearing holding portion.

公开(公告)号：US20240305159A1

公开(公告)日：2024-09-12

申请号：US18547701

申请日：2021-06-11

Applicant: NIDEC CORPORATION

Inventor： Satoshi KAJIKAWA ,  Hibiki TAKADA ,  Takahiro SONODA

IPC: H02K5/20

CPC classification number: H02K5/203

Abstract: A housing of a rotating electrical machine has a flow path extending in a rectangular wave shape along a circumferential direction, and including axial paths, and first and second circumferential paths joining first ends and second ends of the axial paths, respectively. The axial path includes joined first and second paths. A cross-section in each of the first and second paths decreases toward the other. A difference between the cross-sections at the first end and at the first circumferential path is not higher than a difference between the cross-sections at the first end and at a third end of the first path close to the second path. A difference between the cross-sections at the second end and at the second circumferential path is not higher than a difference between the cross-sections at the second end and at a fourth end of the second path close to the first path.

公开(公告)号：US20190052152A1

公开(公告)日：2019-02-14

申请号：US16059083

申请日：2018-08-09

Applicant: Nidec Corporation

Inventor： Yusuke MAKINO ,  Satoshi KAJIKAWA

IPC: H02K9/06 ,  H02K5/10 ,  H02K5/20 ,  H02K7/08 ,  H02K5/173

CPC classification number: H02K9/06 ,  H01R25/16 ,  H02K1/2773 ,  H02K1/278 ,  H02K1/28 ,  H02K5/10 ,  H02K5/16 ,  H02K5/161 ,  H02K5/1735 ,  H02K5/20 ,  H02K5/225 ,  H02K7/08 ,  H02K7/083 ,  H02K7/085 ,  H02K7/088 ,  H02K15/14 ,  H02K15/165 ,  H02K2201/06

Abstract: A motor includes a shaft, a bearing mechanism rotatably supporting the shaft, a cylindrical rotor main body fixed to the shaft, a rotor fan fixed to the shaft, an armature, and a housing. The bearing mechanism includes a first bearing above the rotor fan in the housing and facing the rotor fan in an up and down direction. The housing includes a first opening, a second opening, and a bearing holding portion. A cylindrical wind tunnel portion is outward of the rotor fan in a radial direction. An inner surface of the wind tunnel portion and the rotor fan face each other in the radial direction. An upper end portion of the inner surface of the wind tunnel portion and an outer surface of the bearing holding portion face each other in the radial direction.

公开(公告)号：US20190052151A1

公开(公告)日：2019-02-14

申请号：US16055208

申请日：2018-08-06

Applicant: Nidec Corporation

Inventor： Yusuke MAKINO ,  Satoshi KAJIKAWA

IPC: H02K9/06 ,  H02K5/10 ,  H02K5/20 ,  H02K7/08 ,  H02K5/173

Abstract: A motor includes a shaft with a central axis along an up and down direction as a center, a cylindrical rotor main body fixed to the shaft, a rotor fan fixed to the shaft at an upper side of the rotor main body, an armature facing the rotor main body in a radial direction, a bus bar electrically connecting the armature to an external power supply, a bus bar holding portion that holds the bus bar, and a housing that accommodates the rotor main body, the rotor fan, the armature, the bus bar, and the bus bar holding portion therein. The housing includes a first opening positioned above the armature and a second opening below the armature in the up and down direction. The bus bar holding portion is disposed outward the rotor fan in the radial direction.