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公开(公告)号：US20250055328A1
公开(公告)日：2025-02-13
申请号：US18703852
申请日：2022-10-21
Applicant: MITSUI HIGH-TEC, INC.
Inventor： Hiroyuki MORIYAMA , Shintaro BABA , Hiroki KAKU
Abstract: Provided is a laminated iron core including: a laminate of electromagnetic steel sheets and a granular oxide that contains magnetite and covers a side surface of the laminate, in which a contact angle of a water droplet until 20 minutes elapses after dropping the water droplet on the side surface covered with the granular oxide is 80° or more. When heights of peaks detected in ranges of 2θ of 41° to 42° and 38° to 39° in XRD measurement of the side surface covered with the granular oxide are represented by H1 and H2, respectively, H1/(H1+H2) is 0.8 or more.
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公开(公告)号：US12206304B2
公开(公告)日：2025-01-21
申请号：US17801908
申请日：2021-01-18
Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
Inventor： Shinichi Isobe , Masahiko Ezumi , Mikito Sasaki , Masahiro Nii
IPC: H02K21/24 , H02K1/02 , H02K1/2793 , H02K3/47
Abstract: An axial-gap coreless rotary electric machine includes rotors, stators, and a case. Armature coils of the stators include a first coil segment and a second coil segment facing the first coil segment. The case includes a first case segment and a second case segment facing the first case segment.
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公开(公告)号：US20250015643A1
公开(公告)日：2025-01-09
申请号：US18710499
申请日：2022-11-09
Applicant: ZHEJIANG FOUNDER MOTOR CO., LTD.
Inventor： Liangzi LI
Abstract: The present disclosure provides a method for forming a rotor structure, including: providing a plurality of magnet units, wherein each of the plurality of magnet units comprises a magnet component having a plurality of tooth portions; and dividing an ideal sinusoidal air-gap magnetic field wave into N segments, wherein when the center line of a tooth portion of the plurality of tooth portions is in a corresponding segment of the ideal sinusoidal air-gap magnetic field wave, the area of the tooth portion is equal to the area of the corresponding segment of the ideal sinusoidal air gap magnetic field wave. The present disclosure further provides a rotor structure formed by the method according to the present disclosure, and a motor structure including the rotor structure.
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公开(公告)号：US20250014800A1
公开(公告)日：2025-01-09
申请号：US18710408
申请日：2022-09-22
Applicant: JFE STEEL CORPORATION
Inventor： Takeshi OMURA , Yoshihisa ICHIHARA , Souichiro YOSHIZAKI
IPC: H01F27/245 , B32B15/01 , H02K1/02
Abstract: A laminated core includes a stack of pieces of an electrical steel sheet that have a predetermined shape resulting from processing and includes a butted portion at which portions of a processed surface of the electrical steel sheet are abutted against each other. In the electrical steel sheet, an area ratio of regions of the processed surface that have an arithmetic mean roughness Ra of 5 μm or less is 90% or greater based on a total area of the processed surface.
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公开(公告)号：US12184138B2
公开(公告)日：2024-12-31
申请号：US17786957
申请日：2021-01-26
Applicant: NSK LTD.
Inventor： Toshifumi Taguchi , Hayao Watanabe , Masayuki Maruyama , Kenichi Fukuyama
Abstract: A motor includes a housing including a housing base and a housing shaft portion that is provided on the housing base and extends in a direction along a rotation center axis, a motor stator that is disposed outward in a radial direction of the housing shaft portion, a motor rotor that is provided between the motor stator and the housing shaft portion, a bearing that is provided inward in a radial direction of the motor rotor and rotatably supports the motor rotor to the housing shaft portion, a sealing structure that is provided on an opposite side to the housing base in an axial direction of the motor rotor and seals between the motor rotor and the housing shaft portion, and a resolver that is configured to detect rotation of the motor rotor.
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Patent Agency Ranking
公开(公告)号：US20240429761A1
公开(公告)日：2024-12-26
申请号：US18822425
申请日：2024-09-02
Applicant: Advanced Magnet Lab, Inc.
Inventor： Mark Senti , Philippe Masson
Abstract: A configuration of a plurality of elongate, axially-magnetized curvilinear permanent magnets having high length to cross-section ratio, produced, for example, by the PM-Wire manufacturing process, that produce an electric machine permanent magnet rotor structure with a very low intrinsic demagnetizing field, allowing for operation at high temperature, at high RPM, or enabling use of permanent magnets comprising low coercivity magnetic materials. Exemplary embodiments of two-pole, four-pole, six-pole and eight-pole rotor permanent magnet configurations for single and dual rotor applications. The novel configuration of axially-magnetized curvilinear permanent magnets reduces demagnetization at high temperature, increases electric machine power density, reduces weight by eliminating the need for back iron, increases motor reliability, reduces manufacturing costs, and enables higher electric motor torque and electric generators. Electric machines, rotors and magnets of the invention may contain no rare earth magnetic materials.
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公开(公告)号：US20240413680A1
公开(公告)日：2024-12-12
申请号：US18330412
申请日：2023-06-07
Applicant: Hamilton Sundstrand Corporation
Inventor： Jeffrey P. King , Zaffir A. Chaudhry , Andrzej E. Kuczek , Wenping Zhao , Huan Zhang , Jagadeesh K. Tangudu
Abstract: A rotor is provided and includes a central hub, an outer ring assembly comprising magnetic elements and back-to-back curved webs radially interposed between the central hub and the outer ring assembly.
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公开(公告)号：US20240405619A1
公开(公告)日：2024-12-05
申请号：US18204253
申请日：2023-05-31
Applicant: MAINPACK INDUSTRIAL CO., LTD.
Inventor： CHUN-NENG HUANG
Abstract: A rotor assembly has a shaft, a core having multiple core sheets, and multiple permanent magnets arranged around the shaft. An angle formed between each adjacent two of the multiple permanent magnets is larger than 0 degree and smaller than or equal to 90 degrees. The multiple core sheets includes multiple stacked major core sheets. Each major core sheet has multiple tooth portions having a projection and a joining cavity. The projections of the tooth portions of one of adjacent two of the major core sheets are inserted into the joining cavities and stacked with the projections of the other one of the two adjacent two major core sheets. The rotor assembly has stable structure and high magnetic flux density.
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公开(公告)号：US12148554B2
公开(公告)日：2024-11-19
申请号：US16586889
申请日：2019-09-27
Applicant: NICHIA CORPORATION
Inventor： Shuichi Tada
Abstract: The present invention provides a bonded magnet having good heat resistance. The present invention relates to a bonded magnet containing a SmFeN magnetic powder, nylon 12, and a hexafluoroisopropanol-unextractable component. The present invention also relates to a method of preparing a bonded magnet, including: bringing a raw material bonded magnet containing a SmFeN magnetic powder and nylon 12 into contact with an amorphizing agent; and heat-treating the raw material bonded magnet in contact with the amorphizing agent.
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10.发明公开公开(公告)号：US20240364155A1
公开(公告)日：2024-10-31
申请号：US18767933
申请日：2024-07-09
Inventor： Yonghua WU , Jingxin CHEN , Mingpan PAN
CPC classification number: H02K1/276 , H02K1/02 , H02K2213/03
Abstract: A modular permanent magnet rotor produced by injection molding, including: an inner core including a central axial hole; a plurality of permanent magnets; a plastic body; and a plurality of outer iron cores. A plurality of radial grooves are formed between every two adjacent outer iron cores, and the plurality of permanent magnets are disposed in the plurality of radial grooves, respectively. The inner core includes a circumferential outer wall including a plurality of dovetail grooves; each of the plurality of outer iron cores includes an inner end includes a dovetail protrusion. The plurality of outer iron cores are disposed around the circumferential outer wall of the inner core, and dovetail protrusions are embedded in the plurality of dovetail grooves, respectively. A gap is formed between the front end of each of the dovetail protrusions and the bottom end of each of the plurality of dovetail grooves.
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