公开(公告)号：US20230352990A1

公开(公告)日：2023-11-02

申请号：US18185380

申请日：2023-03-17

Applicant: HONDA MOTOR CO.,LTD.

Inventor： Ryosuke ITOYAMA ,  Yasuhito TAKEI

IPC: H02K1/02 ,  H02K15/03 ,  H02K1/27

CPC classification number: H02K1/02 ,  H02K1/27 ,  H02K15/03

Abstract: A magnet material producing method includes demagnetizing, by thermal demagnetization in an irreversible manner, a molded permanent magnet, by heating the permanent magnet in a presence of a reducing substance having a reducing property stronger than nitrogen molecules, and cooling the demagnetized permanent magnet to create a molded magnet material. A magnet material with a thickness of 30 µm or more contains, as main components, a rare earth element and a transition metal element. In the above described magnet material, a ratio of (b) a carbon concentration in a surface layer region that is a region within 10 µm from a surface of the magnet material to (a) a carbon concentration in an interior region that is a region arranged in a position away from the surface of the magnet material by more than 10 µm and having a thickness of 10 µm is 1.1 or more.

公开(公告)号：US11801648B2

公开(公告)日：2023-10-31

申请号：US17443156

申请日：2021-07-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kenta Takeshima

IPC: B29C65/02 ,  B29C65/00 ,  H02K1/04 ,  H02K1/27 ,  H02K15/02 ,  H02K15/03 ,  H02K1/276 ,  B29K701/12

CPC classification number: B29C65/02 ,  B29C66/729 ,  H02K1/04 ,  H02K1/276 ,  H02K15/024 ,  H02K15/03 ,  B29K2701/12 ,  B29K2713/00 ,  B29K2995/0007 ,  B29K2995/0008

Abstract: A sheet-shaped insulating member including a thermoplastic resin fiber and an inorganic fiber is arranged on a surface of a magnet body. The insulating member is compressed while being heated to a temperature higher than or equal to a glass transition temperature of the thermoplastic resin fiber, so that the insulating member is thermocompression-bonded to the magnet body in a state in which the inorganic fiber is elastically compressed. A magnet is thus formed. With the magnet arranged in a slot of a rotor core, the magnet is heated to a temperature higher than or equal to the glass transition temperature of the thermoplastic resin fiber. This causes the inorganic fiber to restore elasticity, so that the magnet is fixed to the rotor core.

公开(公告)号：US11791682B2

公开(公告)日：2023-10-17

申请号：US17985152

申请日：2022-11-11

Applicant: GENESIS MOTION SOLUTIONS ULC

Inventor： James Klassen ,  Damian Spasov ,  Bradley Pope ,  Jason Kum

IPC: H02K1/27 ,  H02K1/30 ,  H02K1/274 ,  H02K15/03 ,  H02K1/2791

CPC classification number: H02K1/30 ,  H02K1/274 ,  H02K1/2791 ,  H02K15/03

Abstract: A permanent magnet carrier, which could be a rotor or stator of an electric machine, includes a first non-magnetic ring and a second non-magnetic ring. Between the rings are soft magnetic pole elements. The soft magnetic pole elements each connect to the first and second non-magnetic rings and the soft magnetic pole elements are separated from each other by the first and second non-magnetic rings. Permanent magnets are disposed between the soft magnetic pole elements.

公开(公告)号：US20230291289A1

公开(公告)日：2023-09-14

申请号：US17692443

申请日：2022-03-11

Applicant: BorgWarner, Inc.

Inventor： Yumin Wang ,  Dennis Bubel ,  Brad Chamberlin

IPC: H02K15/03 ,  H02K1/276

CPC classification number: H02K15/03 ,  H02K1/2766

Abstract: Targeted cold working and nitriding is added to specific spots to decrease flux in bridge areas of motor steel laminations to alter the electromagnetic properties of these areas to reduce flux loss and increase the efficiency by using insulations coatings on the lamination steels as a nitriding barrier. The reduction in flux allows for the use of smaller magnets, which decreases costs and results in an increase in performance.

公开(公告)号：US20230291288A1

公开(公告)日：2023-09-14

申请号：US17648568

申请日：2022-01-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Thomas W. Nehl ,  Huaxin Li ,  Anil K. Sachdev

IPC: H02K15/03 ,  H02K1/276 ,  H02K15/12

CPC classification number: H02K15/03 ,  H02K1/276 ,  H02K15/12

Abstract: A rotor for an electric machine includes strengthened structural elements effected through surface alloying and heating via an induction heating fixture. A rotor includes laminations formed to have internal cavities and structural members adjacent the cavities. A number of the laminations are stacked to form a lamination stack. An alloying material is applied to the lamination stack at the structural members. The lamination stack is placed in a fixture so that an inductor extends along the structural members and cooling elements extend through the cavities. A current is applied to the inductor to heat the structural members, alloying the alloying material into the structural members.

公开(公告)号：US11742711B1

公开(公告)日：2023-08-29

申请号：US17074837

申请日：2020-10-20

Applicant: Government of the United States, as represented by the Secretary of the Air Force

Inventor： Zafer Turgut

IPC: H02K1/30 ,  H02K1/27 ,  H02K15/03 ,  H02K1/2781

CPC classification number: H02K1/30 ,  H02K1/2781 ,  H02K15/03

Abstract: A unique rotor assembly for an electrical machine is disclosed herein. The rotor assembly includes a shaft having an axis of rotation extending within the electrical machine. A central support is connected to the shaft at an intermediate position and a pair of opposing end plates are configured to clamp a plurality of laminate plates therebetween. The laminate plates and a sidewall of the end plates have a non-linear cross-sectional shape such that radial loading due to centrifugal force is transmitted from the laminate plates to the end plates during operation.

公开(公告)号：US11739742B2

公开(公告)日：2023-08-29

申请号：US17575456

申请日：2022-01-13

Applicant: Baker Hughes Oilfield Operations LLC

Inventor： James C. Clingman

IPC: F04B17/03 ,  F04B47/06 ,  F04D29/044 ,  H02K5/132 ,  F04D13/10 ,  F04D29/04 ,  F04D29/054 ,  F04D13/08 ,  H02K15/03 ,  F04B39/14

CPC classification number: F04B17/03 ,  F04B39/14 ,  F04B47/06 ,  F04D13/086 ,  F04D13/10 ,  F04D29/044 ,  F04D29/0405 ,  F04D29/054 ,  H02K5/132 ,  H02K15/03

Abstract: An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

公开(公告)号：US11710598B2

公开(公告)日：2023-07-25

申请号：US17595349

申请日：2020-05-29

Applicant: AICHI STEEL CORPORATION

Inventor： Satoru Kan ,  Hiroaki Hirano ,  Hironari Mitarai ,  Takumi Asano ,  Motonobu Furuyama

IPC: H01F41/02 ,  B29C65/66 ,  H01F1/08 ,  H01F1/28 ,  H02K15/03 ,  B29L31/00

CPC classification number: H01F41/0266 ,  B29C65/66 ,  H01F1/083 ,  H01F1/28 ,  H02K15/03 ,  B29L2031/749 ,  Y10T29/49012

Abstract: A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.

公开(公告)号：US20230231428A1

公开(公告)日：2023-07-20

申请号：US17578534

申请日：2022-01-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Cheng Gong

IPC: H02K1/276 ,  H02K5/16 ,  H02K15/03

CPC classification number: H02K1/276 ,  H02K5/16 ,  H02K15/03

Abstract: An interior permanent magnet (IPM) electric machine has an improved rotor configuration to manage mechanical stresses induced by electro-magnetic force acting upon permanent magnets housed therein. This includes providing magnet cavities in the rotor with sufficient clearances in the corners wherein a portion of a slot corner is formed with certain curvature shapes using a novel geometry. By doing this, more surface area is obtained to evenly distribute stress that is induced by centrifugal force acting upon the rotor during rotation, thus reducing the stress concentration. Furthermore, an expanded space is achieved between the magnet corner and the rotor lamination, thus providing robust packaging and dynamic support of the permanent magnets in the magnet cavities. Furthermore, the expanded space provides improved clearance for ease of manufacturing and assembly.

公开(公告)号：US11703058B2

公开(公告)日：2023-07-18

申请号：US16768574

申请日：2018-12-19

Applicant: ebm-papst St. Georgen GmbH & Co. KG

Inventor： Juergen Dold ,  Julian Wege

IPC: H02K15/03 ,  F04D25/06 ,  F04D29/60 ,  H02K1/278 ,  B23P11/00 ,  B21D39/04

CPC classification number: F04D25/06 ,  F04D29/601 ,  H02K1/278 ,  H02K15/03 ,  B21D39/048 ,  B23P11/005 ,  F05B2230/60 ,  H02K2213/12

Abstract: The invention relates to a method for producing a drive unit device, in particular a fan device, which has at least one first modular unit (12) and at least one second modular unit (16), which concentrically accommodates at least a portion of the first modular unit (12), with the first and second modular units (12, 16) being intended to contribute mechanically to a change in torque, and the first modular unit (12) being secured in the second modular unit (16) in at least one method step (100, 110). To increase safety and reduce process costs, it is proposed that the first modular unit (12) be secured in the second modular unit (16) by means of at least one concentric pressing process step.