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：US20190393764A1

公开(公告)日：2019-12-26

申请号：US16562689

申请日：2019-09-06

Applicant: NIPPON STEEL CORPORATION

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

IPC: H02K49/10 ,  H02K1/14 ,  H02K1/17 ,  H02K3/18 ,  H02K7/104

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

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.