Patents Examined by Alex W. Mok
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Patent number: 12009703Abstract: A rotor-cooling structure is for a drive motor including an inner shaft, a rotor shaft surrounding the inner shaft, a rotor connected to the rotor shaft, and a stator disposed to be spaced apart from the rotor. The rotor-cooling structure includes: a first flow passage formed in the inner shaft; a second flow passage formed in the rotor shaft to receive oil through the first flow passage; a third flow passage formed in a plate disposed at an end of a rotor core, constituting the rotor, to be connected to the second flow passage; and a fourth flow passage formed to be connected to the third flow passage and to penetrate the rotor core in the direction in which core plates constituting the rotor core are stacked.Type: GrantFiled: November 1, 2021Date of Patent: June 11, 2024Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATIONInventors: Hong Seok Yang, Tae Ho Kim, Jae Won Ha, Jae Young Choi
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Patent number: 12003147Abstract: Certain embodiments are directed to devices, methods, and/or systems that use electrical machines.Type: GrantFiled: October 5, 2021Date of Patent: June 4, 2024Assignee: Axiflux Holdings Pty Ltd.Inventor: David Elias Jahshan
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Patent number: 11996754Abstract: A motor includes a rotor having a rotation shaft and a bearing mounted to the rotation shaft, a stator surrounding the rotor, a heat dissipation member provided on one side of the rotor in an axial direction of the rotation shaft, and a resin portion covering the stator and at least a part of the heat dissipation member. The heat dissipation member has a first concave portion surrounding the bearing from an outer side in a radial direction about the rotation shaft, and a second concave portion famed on an inner side of the first concave portion in the radial direction.Type: GrantFiled: July 20, 2020Date of Patent: May 28, 2024Assignee: Mitsubishi Electric CorporationInventors: Ryogo Takahashi, Hiroki Aso
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Patent number: 11984763Abstract: A permanent magnet rotor core includes a plurality of rotor poles circumferentially-spaced about a central axis and including a first rotor pole and an adjacent second rotor pole that each include an outer wall, and wherein the rotor core includes a rotor diameter. The rotor core also includes a plurality of radial apertures alternately-spaced with the plurality of rotor poles. The rotor core also includes a first protrusion extending from the first rotor pole into a first radial aperture of the plurality of radial apertures positioned between the first rotor pole and the second rotor pole. The rotor core further includes a second protrusion extending from the second rotor pole into the first radial aperture such that a circumferential opening is defined between the first protrusion and the second protrusion. The opening extends a first length of between approximately 0.052% and approximately 0.058% of the rotor diameter.Type: GrantFiled: March 12, 2020Date of Patent: May 14, 2024Assignees: Regal Beloit America, Inc., Regal Beloit Australia Pty LtdInventors: Mark Thiele, Greg Heins, Subhash Brahmavar, Steve Long, Lester Benjamin Manz, Kerry Shelton
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Patent number: 11984761Abstract: Enhanced composite lightweight coiled windings are discussed which utilize phenolic, non-ferrous and ferrous metals in combination with improved geometrical shapes to create lightweight and highly efficient composite material winding assemblies for use in generators. These generators exhibit improved thermal and energy efficiencies when compared to present day generators. In some embodiments, the ends of these permanent magnets are in contact with intermediate T-shaped ferrous magnetically permeable members as described.Type: GrantFiled: July 18, 2023Date of Patent: May 14, 2024Inventor: Elberto Berdut-Teruel
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Patent number: 11984781Abstract: An electric machine includes a rotor rotatable about a rotational axis, by which an axial direction is defined, and a stator with stator windings, a coolant distributor space and a coolant collector space. The coolant distributor space communicates fluidically with the coolant collector space to cool the stator windings with a cooling duct. The stator includes stator teeth supporting the stator windings and protruding radially inward from a stator body of the stator. A stator groove is formed between two stator teeth which has a radially outer groove zone extending radially inward away from the stator body into a radially inner groove zone, the radially inner zone width of which is smaller than the radially outer zone width, when measured along the circumferential direction, of the radially outer groove zone. At least one stator winding is embedded, for thermal coupling, into an electrically insulating plastic arranged in the stator groove.Type: GrantFiled: June 3, 2020Date of Patent: May 14, 2024Assignee: MAHLE INTERNATIONAL GMBHInventors: John Cunningham, Philip Grabherr, Ian Webb, Tim Male, Stojan Markic, Graham Sentance, Peter Sever, Josef Sonntag, Jon Witcombe
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Patent number: 11973386Abstract: Since the shape of the insulating paper is complicated, a forming and bending step of the insulating paper is required, and further there is a step of inserting the insulating paper in the middle of coil forming, which causes a problem of damaging the insulating paper. A fitting state of an insulating paper 201 into the inter-coil gap has an annular taper shape in which a diameter dimension D1 of an annular opening of the insulating paper 201 on a coil end tip side is long, and a diameter dimension d2 of an annular opening of the insulating paper 201 on a stator end face side on the opposite side is short. The insulating paper 201 is made to follow the tapered shape of the inter-coil gap 140 between an inner peripheral coil 120 and an outer peripheral coil 130, and the insulating paper 201 is fitted in a state inclined from the coil end tip side to the stator end face side with respect to an axial direction of the stator 20.Type: GrantFiled: March 29, 2019Date of Patent: April 30, 2024Assignee: Hitachi Astemo, Ltd.Inventors: Kenji Nakayama, Ryoji Kobayashi, Yuichiro Baba
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Patent number: 11973406Abstract: A rotor (1) for an electric machine (25) which comprises a rotor support (2). The rotor support has cylindrical inner and outer shells (3, 4). A magnetic flux-carrying rotor component has first and second end faces (6, 7) and carries the cylindrical outer shell (4). A rotationally shaft section (8) is arranged in an inside space (9) of the rotor support and mounted coaxially with the rotor support. At least in the area of the first end face (6) the outer shell has first teeth which face toward the magnetic flux-carrying rotor component and a first tooth base between respective pairs of first teeth, and at least in the area of the second end face (7) the outer shell (4) has second teeth which face toward the magnetic flux-carrying rotor component and a second tooth base between respective pairs of second teeth. The invention also relates to an electric machine.Type: GrantFiled: December 16, 2021Date of Patent: April 30, 2024Assignee: ZF Friedrichshafen AGInventors: Rayk Gersten, Stefan Spühler, David Wörzler, Martin Christians, Martin Jelinewski, Alexander Baur
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Patent number: 11967865Abstract: A drive motor includes a housing and a stator iron core arranged inside the housing. A rotor iron core is placed through the inside of the stator iron core. The rotor iron core includes a cylindrical iron core body, and two openings are symmetrically formed on a periphery of the iron core body in a radial direction of the iron core body. The iron core body is provided with a plurality of mounting slots for receiving magnets, and each of both sides of the mounting slot is provided with a magnetic-leakproof air slot. The central part of the iron core body is provided with a through hole into which a rotating shaft is inserted. Moreover, the magnets are mounted in the mounting slots by means of insertion.Type: GrantFiled: January 16, 2019Date of Patent: April 23, 2024Assignees: ZHEJIANG BAOLONG M&E CO., LTD., SHENZHEN YUNDING INFORMATION TECHNOLOGY CO., LTD.Inventors: Zhiyan Guo, Jun Li, Fangkui LIn
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Patent number: 11942822Abstract: Presented are electric machines with optimized stator tooth geometries and multi-gauge stator conductors, methods for making/using such electric machines, and motor vehicles equipped with such electric machines. An electric machine includes a housing, a rotor assembly rotatably attached to the housing, and a stator assembly coaxial with and separated by an airgap from the rotor assembly. The rotor assembly includes one or more magnets mounted to a rotor core. The stator assembly includes a stator core with multiple axially elongated, circumferentially spaced stator slots, multiple radially aligned stator teeth interleaved between and separating the slots, and multiple electromagnetic windings wound through the slots. Each stator tooth has an elongated tooth body with a tooth head at a radial end of a tooth root, which attaches to a cylindrical hub of the stator core. The tooth head has an axial cross-section with a trapezoidal crown integral with a rectangular tip.Type: GrantFiled: December 23, 2021Date of Patent: March 26, 2024Assignee: GM Global Technology Operations LLCInventors: Mohammad F. Momen, Edward L. Kaiser
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Patent number: 11938807Abstract: A device cools a power train of a vehicle including an electric machine with a wound rotor coupled to a speed reducer. The device includes: an oil cooling circuit for cooling the electric machine, the circuit include a heat exchanger connected to an oil tank and a water circuit that connects members of the power train through the radiator of the vehicle; a temperature adjuster of the oil flow supplied at the outlet of the exchanger to a distribution circuit projecting the oil to elements for heating the electric machine; a circuit for lubricating the reducer, the circuit including a sump, the bottom of the sump forming a reserve of oil for lubricating the reducer; and a bypass channel at the outlet of the exchanger, for conveying a portion of the temperature-adjusted oil in contact with the bottom of the sump in order to cool the oil reserve.Type: GrantFiled: March 20, 2020Date of Patent: March 26, 2024Assignees: RENAULT s.a.s., NISSAN MOTOR CO., LTD.Inventors: Bassel Assaad, Julien Borie
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Patent number: 11936312Abstract: A rotor of a rotary electric machine includes magnets arranged to face a winding. The magnets are movable relative to the winding upon the winding being energized. The magnets are arranged in a relative movement direction while magnetic polarities based on the magnets are alternately changed. Each magnet includes a first magnet member configured to generate magnet flux in accordance with a corresponding one of the polarities. The first magnet member has first magnetic orientations defined therein. Each magnet includes a second magnet member provided at a q-axis side end of the corresponding magnet located closer to a pole boundary. The second magnet member has second magnetic orientations defined therein. The second magnetic orientations intersect with the first magnetic orientations.Type: GrantFiled: February 3, 2020Date of Patent: March 19, 2024Assignee: DENSO CORPORATIONInventor: Yuki Takahashi
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Patent number: 11923729Abstract: A transport apparatus comprising a housing, a variable reluctance drive mounted to the housing, and at least one transport arm connected to the variable reluctance drive where the drive includes at least one rotor having salient poles of magnetic permeable material and disposed in an isolated environment, at least one stator having salient pole structures each defining a salient pole with corresponding coil units coiled around the respective salient pole structure and disposed outside the isolated environment where the at least one salient pole of the at least one stator and the at least one salient pole of the rotor form a closed magnetic flux circuit between the at least one rotor and the at least one stator, at least one seal partition configured to isolate the isolated environment; and at least one sensor including a magnetic sensor member connected to the housing, at least one sensor track connected to the at least one rotor, where the at least one seal partition is disposed between and separates the magType: GrantFiled: August 2, 2022Date of Patent: March 5, 2024Assignee: Brook Automation US, LLCInventors: Jairo T. Moura, Reza Saeidpourazar, Branden Gunn, Matthew W. Coady, Ulysses Gilchrist
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Patent number: 11909272Abstract: An oil-cooling structure for motor magnets, that includes: a pair of end plates that are disc-shaped and are mounted at both end portions of a rotor core; third oil paths formed at interiors of the end plates, and having axial direction portions that extend in an axial direction of a rotor shaft and are connected to axial direction end portions of second oil paths, respectively, and discharging portions that extend toward a radial direction outer side from axial direction outer side end portions of the axial direction portions and are open at end portions of the end plates; and angle mitigating members disposed in the third oil paths at corner portions formed by the axial direction portions and the discharging portions, configured to mitigate angles formed by the axial direction portions and the discharging portions in axial direction cross-sections that include the third oil paths.Type: GrantFiled: December 14, 2021Date of Patent: February 20, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hironobu Sakamoto
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Patent number: 11901775Abstract: A rotor includes a rotor iron core, a rotor shaft, and a fastening plate. The rotor iron core includes a first and a second end, and extends along an axial direction. The first fastening plate is fastened to at least the first or second end, and includes a through hole and a first runner. An inlet of the first runner communicates with the through hole. An outlet of the first runner is on a surface of a side of the fastening plate. The rotor shaft includes a second runner and a third runner in the rotor shaft. An inlet of the second runner is at one end of the at least one end of the rotor shaft. An outlet of the second runner communicates with an inlet of the third runner. An outlet of the third runner communicates with the inlet of the first runner.Type: GrantFiled: September 13, 2021Date of Patent: February 13, 2024Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.Inventors: Jiangang Wang, Quanming Li, Tingyu Xie
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Patent number: 11901768Abstract: Plural windings are wound around plural teeth in sequence such that crossover wires formed in the plural windings are all arranged on another axial direction side of an annular section of a stator core. When this is performed, the plural windings are wound around the plural teeth in sequence such that terminal portions of the plural windings are placed in a fifth slot, a sixth slot, an eighth slot, and a ninth slot.Type: GrantFiled: June 23, 2020Date of Patent: February 13, 2024Assignee: DENSO CORPORATIONInventors: Yoshimichi Sahara, Akio Murase
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Patent number: 11901770Abstract: The invention relates to an external stator of a rotating-field machine with internal rotor, which external stator is designed as an internal stator or external stator and which external stator has a number of N stator teeth which together form a number of N/2 tooth groups, and each stator tooth has in each case one pole core and one pole shoe integrally formed thereon, wherein the pole cores are manufactured from a first material, and that in each case one tooth group is formed by two directly adjacently arranged stator teeth which, together with a magnetic return means, are constituent parts of a magnetic circuit, characterized in that, between two adjacent stator teeth of two adjacent tooth groups, there is arranged in each case at least one intermediate element which extends in particular in an axial direction of the stator and which is manufactured from a second material, and in that differs from the first material of the pole cores.Type: GrantFiled: January 28, 2019Date of Patent: February 13, 2024Assignee: LSP INNOVATIVE AUTOMOTIVE SYSTEMS GMBHInventors: Thomas Leiber, Jochen Keller
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Patent number: 11894726Abstract: In a rotating electric machine, a rotor core includes; a gap surface; a plurality of magnet insertion holes; a slit which is formed in a core region between the gap surface and, among the plurality of magnet insertion holes, a magnet insertion hole into which a permanent magnet forming one magnetic pole is inserted, and divides the core region into a plurality of divided core regions in the circumferential direction; and a cutout formed by denting the gap surface of a divided core region, wherein a shortest distance between a stator core imaginary gap surface which is in contact with distal end surfaces of the plurality of teeth, and a bottom point of the cutout is longer than a shortest distance between the stator core imaginary gap surface and each of two intersections between the cutout and the gap surface.Type: GrantFiled: March 22, 2019Date of Patent: February 6, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Junji Kitao, Kosho Yamane, Tomohira Takahashi, Yoshihiro Miyama
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Patent number: 11894719Abstract: A rotor of an electric machine includes a rotor core defining a magnet channel extending axially between opposing ends of the rotor core. A permanent magnet is disposed in the channel and has opposing ends and opposing major sides. The magnet includes a central piece of anisotropic magnetic material having a first magnetically easy crystallographic axis, and a corner piece of anisotropic magnetic material joined to the central piece and having a second magnetically easy crystallographic axis that is oblique to the first easy axis.Type: GrantFiled: September 10, 2020Date of Patent: February 6, 2024Assignee: Ford Global Technologies, LLCInventor: Chuanbing Rong
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Patent number: 11894750Abstract: The present invention relates to a motor comprising: a motor housing; a stator which is provided in the motor housing and has a coil; a rotor installed in the stator to be rotatable about a rotary shaft; and a spray hole which is formed in the circumferential surface of the rotor by passing through the circumferential surface in a radial direction and which sprays a cooling fluid in the motor housing onto the coil according to the rotation of the rotor. Therefore, cooling by oil convection can be accelerated while minimizing resistance due to the oil.Type: GrantFiled: January 7, 2020Date of Patent: February 6, 2024Assignee: LG Magna e-Powertrain Co., Ltd.Inventors: Jongsu Kim, Jungwook Moon, Changhum Jo, Minjung Kim, Taehee Kwak