公开(公告)号：US20220368178A1

公开(公告)日：2022-11-17

申请号：US17662096

申请日：2022-05-05

Applicant: MINEBEA MITSUMI Inc.

Inventor： Naoto TOYOMURA ,  Takuji YAMADA

IPC: H02K1/17 ,  H02K3/28

Abstract: A motor includes a stator and a substrate. The stator includes a plurality of magnetic bodies and a coil wound around each of the magnetic bodies. The substrate opposes the stator in the rotational axis direction. The coil includes a first layer and a second layer stacked on the first layer. 1≤D/L holds, where L is a thickness of the magnetic body in the rotational axis direction and D is a width of the magnetic body in a radial direction. In the radial direction, a conducting wire of the first layer and a conducting wire of the second layer making up an inner edge of the coil are in contact with each other, and, in the radial direction, a conducting wire of the first layer and a conducting wire of the second layer making up an outer edge of the coil are in contact with each other.

公开(公告)号：US20220037943A1

公开(公告)日：2022-02-03

申请号：US17296387

申请日：2019-08-19

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Naoto TOYOMURA

IPC: H02K1/27 ,  H02K21/16

Abstract: The present invention provides a rotor, a motor using the rotor and an electronic device capable of effectively utilizing magnetic flux generated from a magnet. The rotor includes a rotor core including an annular portion and a plurality of magnetic pole pieces radially extending from the annular portion via a pair of joint portions, a plurality of first magnets disposed between the neighboring magnetic pole pieces in a circumferential direction, and a plurality of second magnets disposed between the pair of joint portions, in which each of the first magnets contacts side surfaces of two neighboring magnetic pole pieces in the circumferential direction and each of the second magnets contacts inner surfaces of the magnetic pole pieces in a radial direction.

公开(公告)号：US20250023411A1

公开(公告)日：2025-01-16

申请号：US18711382

申请日：2022-09-30

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Youko TAMURA ,  Ryu MONJIYAMA

IPC: H02K1/28 ,  H02K1/276 ,  H02K11/215

Abstract: A motor includes a rotor and a stator opposing the rotor in a radial direction. The rotor includes a yoke, a magnet, and a resin part covering the yoke and the magnet. The resin part is disposed adjacent to the magnet in a circumferential direction.

公开(公告)号：US20240275225A1

公开(公告)日：2024-08-15

申请号：US18644549

申请日：2024-04-24

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Naoto TOYOMURA

IPC: H02K1/276 ,  H02K21/16

CPC classification number: H02K1/2773 ,  H02K21/16

Abstract: The present application provides a rotor, a motor using the rotor and an electronic device capable of effectively utilizing magnetic flux generated from a magnet. The rotor includes a rotor core including an annular portion and a plurality of magnetic pole pieces radially extending from the annular portion via a pair of joint portions, a plurality of first magnets disposed between the neighboring magnetic pole pieces in a circumferential direction, and a plurality of second magnets disposed between the pair of joint portions, in which each of the first magnets contacts side surfaces of two neighboring magnetic pole pieces in the circumferential direction and each of the second magnets contacts inner surfaces of the magnetic pole pieces in a radial direction.

公开(公告)号：US20240339883A1

公开(公告)日：2024-10-10

申请号：US18249261

申请日：2021-10-22

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Hiroaki MURAKAMI ,  Youko TAMURA

IPC: H02K3/34 ,  H02K1/14

CPC classification number: H02K3/34 ,  H02K1/14

Abstract: In a motor of an embodiment, an insulator includes a wall part having two recess parts (an insulator-side first recess part and an insulator-side second recess part) opposed to two drawing positions of a conducting wire drawn out from a coil in a radial direction. One of the two drawing positions is located at an outer peripheral portion of the coil, and the other is located at an inside of the outer peripheral portion. A substrate includes a substrate-side first recess part and a substrate-side second recess part recessed at an inside in the radial direction from an outer peripheral end and adjacent to each other in a circumferential direction. The substrate-side first recess part is opposed to the insulator-side first recess part, and the substrate-side second recess part is opposed to the insulator-side second recess part.

公开(公告)号：US20240356399A1

公开(公告)日：2024-10-24

申请号：US18684988

申请日：2021-08-31

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Toru WATANABE

IPC: H02K1/278

CPC classification number: H02K1/278 ,  H02K2201/03

Abstract: A motor includes: a rotor including a yoke, a first magnet, and a second magnet opposing the first magnet; and a stator. The yoke includes a hole and a frame surrounding the hole. The first magnet is disposed in the hole of the yoke. The second magnet includes a first surface opposing the frame of the yoke in the peripheral direction and a second surface opposing the stator in the radial direction.

公开(公告)号：US20240356398A1

公开(公告)日：2024-10-24

申请号：US18294236

申请日：2022-07-08

Applicant: MINEBEA MITSUMI Inc.

Inventor： Takuji YAMADA ,  Kouji KEBUKAWA ,  Toru WATANABE ,  Naoto TOYOMURA

IPC: H02K1/276 ,  H02K21/16

CPC classification number: H02K1/2773 ,  H02K21/16

Abstract: Provided is a rotor allowing effectively utilizing magnetic flux generated from a magnet, a motor using the rotor, and an electronic device. Provided are a rotor, a motor using the rotor, and an electronic device, the rotor including a plurality of magnetic bodies stacked in an axial direction and a plurality of magnets. The magnetic body includes: an annular part; a plurality of magnetic pole pieces extending in a radial direction; and a plurality of coupling parts configured to couple each of the plurality of magnetic pole pieces and the annular part. The plurality of magnets are each disposed between two adjacent magnetic pole pieces among the plurality of magnetic pole pieces in a circumferential direction. The coupling part extends with both components including a component in the radial direction and a component in the circumferential direction.

公开(公告)号：US20230378831A1

公开(公告)日：2023-11-23

申请号：US18248074

申请日：2021-10-15

Applicant: MINEBEA MITSUMI Inc.

Inventor： Naoto TOYOMURA ,  Takuji YAMADA

IPC: H02K1/276 ,  H02K21/16

CPC classification number: H02K1/2773 ,  H02K21/16

Abstract: Provided is a rotor capable of effectively utilizing magnetic flux generated from a magnet, a motor using the rotor, and an electronic device. The rotor, the motor using the rotor, and the electronic device include a rotor core including: an annular part; a plurality of magnetic pole pieces extending in a radial direction; and a plurality of connecting parts configured to connect the annular part and each of the plurality of magnetic pole pieces; a plurality of first magnets disposed between two adjacent magnetic pole pieces of the plurality of magnetic pole pieces in a circumferential direction; and a plurality of second magnets disposed in a space formed between two adjacent connecting parts of the plurality of connecting parts in the circumferential direction, the connecting parts extending in a direction having both of a component of the radial direction and a component of the circumferential direction.