公开(公告)号：US20220028608A1

公开(公告)日：2022-01-27

申请号：US17312103

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H01F41/02 ,  H02K1/27 ,  H02K1/18 ,  H01F27/245

Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.

公开(公告)号：US20250132711A1

公开(公告)日：2025-04-24

申请号：US18689797

申请日：2022-06-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Rei HONMA

IPC: H02P23/04 ,  H02P23/14

Abstract: An excitation waveform determination device (100) sets an initial candidate solution group (IS) and a new candidate solution group (US) as one or a plurality of candidate groups of an excitation waveform based on a harmonic superimposition condition (HC) being information that specifies a harmonic to be superimposed on a fundamental wave included in the excitation waveform, executes an electromagnetic field analysis to calculate respective electromagnetic forces generated in a stator (320) when making the candidate solutions included in the one or plurality of set candidate solution groups of the excitation waveform flow through a motor (M), and determines the excitation waveform based on a result of the execution of the electromagnetic field analysis.

公开(公告)号：US20220014052A1

公开(公告)日：2022-01-13

申请号：US17293795

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H02K1/18

Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part provided between electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein the adhesion part partially adheres the electrical steel sheets adjacent to each other in the stacking direction, and the adhesion parts adjacent to each other in the stacking direction have different arrangement regions in a plan view seen in the stacking direction.

公开(公告)号：US20250167699A1

公开(公告)日：2025-05-22

申请号：US18727457

申请日：2023-03-09

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Rei HONMA

IPC: H02P6/10 ,  B60L15/20

Abstract: A processing device (400) sets an amplitude (I5) of a fifth harmonic to make an amplitude ratio (A5) to be greater than 20% and 80% or less. Further, the processing device (400) sets a phase difference (φ5) to make a phase of the fifth harmonic with respect to a fundamental wave to be a leading phase, and to make the phase difference (φ5) to be 80° or more and 106° or less.

公开(公告)号：US20220385119A1

公开(公告)日：2022-12-01

申请号：US17775754

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Miho TOMITA ,  Tesshu MURAKAWA

IPC: H02K1/02 ,  C22C38/60 ,  C22C38/16 ,  C22C38/10 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

Abstract: The present invention is a stator core (21) including a plurality of split cores (30), in which the plurality of split cores (30) are configured by laminating core pieces (40) made of an electrical steel sheet, the electrical steel sheet is a predetermined electrical steel sheet, and, in the core pieces (40) of at least one split core (30) in the plurality of split cores (30), the radial directions of teeth (41) and extension directions of core backs (42) are all along a direction in which magnetic characteristics of the electrical steel sheet are excellent.

公开(公告)号：US20220385118A1

公开(公告)日：2022-12-01

申请号：US17775728

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Miho TOMITA ,  Tesshu MURAKAWA

IPC: H02K1/02 ,  C22C38/60 ,  C22C38/16 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/08

Abstract: An electrical steel sheet (300) is formed such that centerlines of four magnetic poles (salient poles) of a rotor core (111) coincide with a direction of easy magnetization (ED1) or (ED2). In addition, the electrical steel sheets (300) are laminated such that the directions of easy magnetization (ED1) and (ED2) are aligned.