公开(公告)号：US20220216741A1

公开(公告)日：2022-07-07

申请号：US17594198

申请日：2020-04-21

Applicant: NIPPON STEEL CORPORATION

Inventor： Nao OTAKI ,  Hirokazu OKADA ,  Yasutaka NOGUCHI ,  Kenji IMANISHI ,  Masahiro TASAKA

IPC: H02K1/02 ,  C22C38/54 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H02K49/04

Abstract: A cylindrical part of a rotor for an eddy current deceleration device of the present embodiment has a chemical composition consisting of, by mass %, C: 0.05 to 0.15%, Si: 0.10 to 0.40%, Mn: 0.50 to 1.00%, P: 0.030% or less, S: 0.030% or less, Mo: 0.20 to 1.00%, Nb: 0.020 to 0.060%, V: 0.040 to 0.080%, sol. Al: 0.030 to 0.100%, B: 0.0005 to 0.0050%, N: 0.003 to 0.010%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Cr: 0 to 0.10%, and the balance: Fe and impurities, and in which the total area fraction of martensite and bainite in a microstructure is more than 95.0%, and the number density of carbides having an equivalent circular diameter of 100 to 500 nm is 0.35 to 0.75 particles/μm2.

公开(公告)号：US20210036595A1

公开(公告)日：2021-02-04

申请号：US16964283

申请日：2019-01-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenji IMANISHI ,  Takuya FUJITA ,  Hiroyuki YAMAGUCHI ,  Hiroshi NOGAMI ,  Yasutaka NOGUCHI ,  Mitsuo MIYAHARA

IPC: H02K49/04 ,  H02K7/104 ,  H02K49/10

Abstract: A decelerating apparatus includes a brake member, primary and secondary permanent magnets and pole pieces. The primary permanent magnets are arranged in a circumferential direction to face an inner or outer peripheral surface of the brake member with a gap in between. Each of the primary permanent magnets has two opposite magnetic poles arranged in a radial direction. The secondary permanent magnets and the pole pieces are placed in the gap and arranged in the circumferential direction. Each of the secondary permanent magnets has two opposite magnetic poles arranged in the circumferential direction. Each of the pole pieces is positioned between adjacent secondary permanent magnets. Magnetic pole arrangements of adjacent primary permanent magnets are opposite to each other. Magnetic pole arrangements of adjacent secondary permanent magnets are opposite to each other. Each of the secondary permanent magnets has a trapezoidal cross-sectional shape including an upper base and a lower base.

公开(公告)号：US20230089505A1

公开(公告)日：2023-03-23

申请号：US17904449

申请日：2021-02-10

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasutaka NOGUCHI ,  Hiroshi NOGAMI ,  Kenji IMANISHI ,  Takuya FUJITA ,  Yozo OKUDA

IPC: H02K49/04

Abstract: An eddy current deceleration device includes a rotor and a stator. The rotor includes a hub, a rotor body, and a spoke. The spoke has neutral axes. The first neutral axis is a neutral axis when the spoke is bent in a circumferential direction of the rotor body. The first neutral axis is positioned forward in a rotating direction of the rotor with respect to a center line of the spoke in the circumferential direction. The second neutral axis is a neutral axis when the spoke is bent in an axial direction of the rotor body. The second neutral axis is positioned on a rotor body side with respect to a center line of the spoke in the axial direction.

公开(公告)号：US20210363771A1

公开(公告)日：2021-11-25

申请号：US16760508

申请日：2018-11-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroshi NOGAMI ,  Kenji IMANISHI ,  Yasutaka NOGUCHI ,  Ryohsuke MASUI ,  Kumpei SANO

IPC: E04H9/02 ,  F16F15/03 ,  F16F6/00

Abstract: An eddy current damper includes a magnet holding member, a first permanent magnet having a thickness (H1), a second permanent magnet having a thickness (H1), a conductive member, a ball nut, a screw shaft, and a copper layer having a thickness (H2). The second permanent magnet is adjacent to the first permanent magnets with a gap therebetween in the circumferential direction of the magnet holding member. The ball nut is fixed to the magnet holding member or the conductive member. The copper layer is fixed to the conductive member and is opposed to the first permanent magnet and the second permanent magnet with a gap therebetween. The thickness (H1) and the thickness (H2) satisfy, with respect to a distance (R1) between a central axis of the screw shaft and the center of gravity of the first permanent magnet: 0.018≤H1/R1≤0.060, and 0.0013≤H2/R1≤0.0065.

公开(公告)号：US20220320988A1

公开(公告)日：2022-10-06

申请号：US17596215

申请日：2020-06-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Hirokazu OKADA ,  Yasutaka NOGUCHI ,  Nao OTAKI ,  Tetsuya YAMADA

IPC: H02K49/04 ,  H02K1/17

Abstract: The eddy current deceleration device according to the present disclosure includes: a stator including a cylindrical body and a plurality of magnets disposed on an outer circumferential surface of the cylindrical body; and a rotor including a cylindrical part that houses the cylindrical body, wherein the cylindrical part of the rotor includes, on an inner circumferential surface of the cylindrical part, in order closest to the inner circumferential surface: a first layer consisting of one of an Ni—P alloy that is an Ni alloy consisting of P with the balance being Ni and impurities and an Ni—B alloy that is an Ni alloy consisting of B with the balance being Ni and impurities; a second layer consisting of nickel; a third layer consisting of one of copper and copper alloy; a fourth layer consisting of nickel alloy; and a fifth layer consisting of nickel.

公开(公告)号：US20200067397A1

公开(公告)日：2020-02-27

申请号：US16466105

申请日：2017-10-03

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroshi NOGAMI ,  Kenji IMANISHI ,  Yasutaka NOGUCHI ,  Hiroyuki YAMAGUCHI ,  Shotaro KADOKAWA ,  Takuya FUJITA

IPC: H02K49/10 ,  H02K9/22

Abstract: A retarder includes a rotor, a plurality of fins, a plurality of permanent magnets, a switching mechanism, a first cover, a second cover, and a cover-switching mechanism. The fins are provided on an outer peripheral surface of the rotor and inclined with respect to a rotation direction of the rotor. The magnets are arranged inside the rotor. The first cover faces an end face of the rotor and includes a plurality of holes. The second cover protrudes from an outer circumferential edge of the first cover toward a rotor side. The cover-switching mechanism opens the holes in the braking state and closes the holes in the non-braking state. The first cover is disposed on a side on which a leading end portion of each fin is present. The retarder achieves suppressing windage and ensuring a heat dissipation performance.