公开(公告)号：US20190393746A1

公开(公告)日：2019-12-26

申请号：US16402460

申请日：2019-05-03

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Tomoya UEDA ,  Yusuke ISOGAI

IPC: H02K1/27 ,  H02K15/03 ,  H02K29/03 ,  H02K21/16 ,  H02K1/24 ,  H02K1/28 ,  H02K16/02 ,  H01H50/16

Abstract: A rotatable about a center axis includes a rotor core including an annular inner core portion extending along a circumferential direction, and outer core portions spaced apart along the circumferential direction on an outer side in a radial direction of the inner core portion, magnets each positioned between the outer core portions adjacent to each other in the circumferential direction, and a support that supports the rotor core and the magnet. The support includes an inner support portion that supports the magnet on an inner side in a radial direction of the magnet, an outer support portion that supports the magnet on an outer side in a radial direction of the magnet, and a bridge portion that extends in the radial direction to connect the inner support portion and the outer support portion. The outer core portion includes a penetrating portion that penetrates the outer core portion in the radial direction. At least a portion of the bridge portion is positioned inside the penetrating portion.

公开(公告)号：US20220006341A1

公开(公告)日：2022-01-06

申请号：US17280430

申请日：2019-09-26

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Tomoya UEDA ,  Mitsuhiro TAKEMOTO ,  Yusuke ISOGAI

IPC: H02K1/27 ,  H02K1/28 ,  H02K15/03

Abstract: A rotor used in an outer rotor motor includes a rotor holder in a tubular shape extending along a center axis, a rotor core in a tubular shape extending in an axial direction and being fixed to a surface of the rotor holder, directed radially inward, and permanent magnets bonded to an inner circumferential surface of the rotor core and side by side in a circumferential direction. The rotor core includes projection portions projecting radially inward from the inner circumferential surface of the rotor core. One or more of the projection portions are in a gap between the permanent magnets adjacent to each other in the circumferential direction. Each of the projection portions has an axial length shorter than an axial length of each of the permanent magnets.

公开(公告)号：US20210036563A1

公开(公告)日：2021-02-04

申请号：US16934051

申请日：2020-07-21

Applicant: Nidec Corporation

Inventor： Mitsuhiro TAKEMOTO ,  Sho FUKUHARA ,  Shinji TAKEMOTO

IPC: H02K1/30 ,  H02K1/27 ,  H02K7/14

Abstract: A motor includes a rotor with one or more magnets, a rotor core holding the one or more magnets, a spacer that contacts the one or more magnets, and a rotor holder. The rotor holder includes a holder lid portion and a holder tubular portion in a tubular shape extending to one side in the axial direction from a radially outer edge of the holder lid portion. The holder lid portion includes a holder first surface that extends radially inward from an inner surface of the holder tubular portion, a holder second surface that extends radially and is radially inward of the holder first surface and on the other side in the axial direction, and a connecting surface connecting the holder first surface and the holder second surface.

公开(公告)号：US20200307778A1

公开(公告)日：2020-10-01

申请号：US16793060

申请日：2020-02-18

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Kosuke MIZUIKE ,  Yoshitsugu SASAGURI

IPC: B64C27/12 ,  B64C39/02 ,  B64C27/08

Abstract: A motor mounted on a drone includes a rotor including a propeller mounting portion with a propeller detachably attached, the rotor being rotatable about a central axis, a stator radially facing the rotor with a gap therebetween, and an auto-balancer capable of automatically correcting dynamic balance of the rotor.

公开(公告)号：US20200067370A1

公开(公告)日：2020-02-27

申请号：US16448034

申请日：2019-06-21

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Keizo FURUKAWA ,  Tsuyoshi HIROKAWA

IPC: H02K5/15 ,  H02K5/16 ,  H02K5/22

Abstract: A motor includes a stationary portion, a rotating portion that includes a shaft rotating about a vertically extending central axis, and a bearing portion that rotatably supports the shaft with respect to the stationary portion. The stationary portion includes a cylindrical bearing housing portion that holds the bearing portion, a stator that is radially outward of the bearing housing portion and includes a stator core, a circuit board that is below the stator core, and an annular spacer that is between the stator core and the bearing housing portion. The spacer includes multiple side wall portions that contact a radially inner surface of the stator core and a flange portion that protrudes radially outward more than the side wall portion and contacts a lower surface of the stator core.

公开(公告)号：US20250137466A1

公开(公告)日：2025-05-01

申请号：US18921190

申请日：2024-10-21

Applicant: NIDEC CORPORATION

Inventor： Shinji TAKEMOTO

IPC: F04D29/66 ,  F04D19/00 ,  F04D29/32 ,  F04D29/52

Abstract: A blower includes an impeller and a housing. The impeller is rotatable about a central axis. The housing accommodates the impeller. The housing includes a cylindrical wall portion extending along the central axis and covers the impeller from radially outside and including groove portions recessed in a radial direction from an inner circumferential surface of the cylindrical wall portion and arranged in a circumferential direction. A circumferential width of each of the groove portions decreases from an end portion on an upstream side in an air blowing direction of the impeller toward an end portion on a downstream side in the air blowing direction.

公开(公告)号：US20210036584A1

公开(公告)日：2021-02-04

申请号：US16934050

申请日：2020-07-21

Applicant: Nidec Corporation

Inventor： Mitsuhiro TAKEMOTO ,  Sho FUKUHARA ,  Shinji TAKEMOTO

IPC: H02K11/30 ,  H02K11/21 ,  H02K11/00 ,  H02K1/16 ,  H02K1/27 ,  H02K1/28

Abstract: A motor includes a rotor rotatable about a center axis extending vertically, a stator radially opposing the rotor, a bracket holding the stator, a circuit board including an upper surface with a first wiring pattern and a lower surface with a second wiring pattern, and a first fixing portion having conductivity and fixing the circuit board to the stator. The stator includes a stator core having conductivity. The first fixing portion includes a board holding portion holding the circuit board, and a stator fixed portion fixed to a portion of the stator core. The board holding portion is in contact with the first wiring pattern and the second wiring pattern.

公开(公告)号：US20200251942A1

公开(公告)日：2020-08-06

申请号：US16637275

申请日：2018-09-28

Applicant: NIDEC CORPORATION

Inventor： Tomoya UEDA ,  Shinji TAKEMOTO ,  Yusuke ISOGAI

IPC: H02K1/27 ,  H02K1/28 ,  H02K15/03 ,  H02K5/16 ,  H02K21/14

Abstract: According to one aspect of the present disclosure, a rotor includes a shaft, a rotor core including an inner core and a plurality of outer cores, a mold resin unit covering, the mold resin unit, and a plurality of permanent magnets. The mold resin unit includes a gate mark in a region between the outer cores adjacent to each other in the circumferential direction, and the gate mark is provided in all regions between the adjacent outer cores or in a region between the outer cores, the region being adjacent to a region between the even-numbered adjacent outer cores in which the gate mark is not disposed in all the regions between the adjacent outer cores.

公开(公告)号：US20190091856A1

公开(公告)日：2019-03-28

申请号：US16102821

申请日：2018-08-14

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Satoshi YAMANE ,  Tomoyoshi YOKOGAWA ,  Masaaki NAKAGAWA ,  Shigekatsu MATSUDA

IPC: B25J9/10 ,  F16H57/12 ,  F16H1/28

Abstract: A transmission includes a first rotating portion, an eccentric body, a bearing, an external gear, an internal gear, carrier pins, and a second rotating portion. The first rotating portion rotates about a central axis. The eccentric body rotates therewith and a distance from the central axis to an outer surface thereof varies circumferentially. The bearing is provided on the eccentric body. The external gear includes through holes and is provided on the bearing. The internal gear is cylindrical, surrounds the central axis, and is disposed radially outside the external gear. The carrier pins are columnar and inserted into the through holes. The second rotating portion, to which upper portions of the carrier pins are fixed, rotates about the central axis. The external and internal gears have different numbers of teeth. The tooth of the external gear farthest from the central axis meshes with the internal gear. The diameters of the carrier pins decrease upward.

公开(公告)号：US20230261532A1

公开(公告)日：2023-08-17

申请号：US18109901

申请日：2023-02-15

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Tsuyoshi HIROKAWA

IPC: H02K1/14 ,  H02K5/04 ,  H02K21/16 ,  H02K15/02

CPC classification number: H02K1/148 ,  H02K5/04 ,  H02K15/022 ,  H02K21/16

Abstract: A motor includes a rotor and a stator. The rotor is rotatable about an axially extending central axis. The stator includes a stator core radially opposing the rotor. The stator core includes core back pieces and a teeth portion. The core back pieces are arranged circumferentially about the central axis. The teeth portion extends radially. The core back pieces which are circumferentially adjacent to each other are connected circumferentially via an end on a side of the core back pieces in a radial direction of the teeth portion.