Rotor Patents (Class 29/598)
  • Patent number: 11223259
    Abstract: To effectively cover a coil end with a resin layer. A method for manufacturing a stator includes a first resin layer forming step (ii) of forming a first thermoset resin layer by impregnating the tip end side of a coil end with first thermoset resin, the coil end protruding from the core of the stator, the first thermoset resin having liquidity; a second resin layer forming step (iii) of forming a second thermoset resin layer on the first thermoset resin layer by dropping second thermoset resin from the core side of the coil end toward the tip end side; and a curing step of curing the first thermoset resin and the second thermoset resin.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: January 11, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Masashi Kawai, Yasushi Nishikuma, Hiroaki Takeda
  • Patent number: 11218059
    Abstract: In a case where a permanent magnet is inserted into each of a plurality of magnet-insert holes of a laminated iron core and then a resin is injected into the plurality of magnet-insert holes from a resin pool pot formed in one of an upper die and a lower die with the laminated iron core pinched and the resin is cured inside the plurality of magnet-insert holes to fix the permanent magnets to the laminated iron core, a dummy plate which abuts on the laminated iron core and includes a gate hole for allowing passage of the resin delivered from the resin pool pot and guiding the resin to the plurality of magnet-insert holes. The gate hole partially overlaps with at least two of the plurality of magnet-insert holes in a plan view of the dummy plate and the laminated iron core.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: January 4, 2022
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Iwao Myojin
  • Patent number: 11190090
    Abstract: An apparatus for automated encapsulation of motor rotor core with magnet steel is introduced. The apparatus includes at least one encapsulation unit, a plastic granule feeding device, a waste removing device, a conveyance device and a control device. Under a coordinated control of the control device, a rotor core feeding mechanism of the encapsulation unit feeds rotor cores to a plastic dispensing mechanism in cycles, the plastic granule feeding device separates, outputs and dispenses plastic granules, so that they are arrayed before being dispensed onto the rotor cores, and the conveyance device conveys plastic granules and moves the waste removing device to carry waste to a waste removal zone. With these arrangements, it is able to realize automated feeding of rotor cores, automated feeding of plastic granules and automated removal of waste to achieve completely automated rotor core encapsulation operation while enables mass production of motor rotor cores.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: November 30, 2021
    Assignee: GALLANT MICRO. MACHINING CO., LTD.
    Inventors: Hung-Neng Lai, Mu-Ching Chang, Chih-Yuan Chiang, Chih-Hung Hsu, Chun-Chiang Ding
  • Patent number: 11177725
    Abstract: Provided is an IPM motor that is strong and has high output. An IPM motor has a rotor that includes a rotor core as a laminate of a plurality of metal foil pieces made of a soft magnetic material that are stacked in a direction of a rotation axis of the rotor. The rotor core has a plurality of through-holes that penetrates through the rotor core in the direction of the rotation axis, the plurality of through-holes including through-holes embedding magnets. The rotor core includes inner bridges and outer bridges. At least one of the inner bridges and the outer bridges of the rotor core is made of an amorphous soft magnetic material, and other parts are made of a nanocrystal soft magnetic material.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: November 16, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Fumitaka Yoshinaga, Akira Yamashita, Airi Kamimura, Kazuaki Haga, Kensuke Komori
  • Patent number: 11177721
    Abstract: A rotating electrical machine includes a rotor and a stator. A first end plate includes a first refrigerant discharge hole which communicates with a second refrigerant flow path hole and supplies refrigerant to a first coil end and a first groove portion which supplies the refrigerant supplied from a refrigerant flow path to a first refrigerant flow path hole and does not supply the refrigerant to the first refrigerant discharge hole and the second refrigerant flow path hole. A second end plate includes a second refrigerant discharge hole which supplies the refrigerant to a second coil end and a second groove portion which supplies the refrigerant supplied from the first refrigerant flow path hole to the second refrigerant flow path hole and supplies the refrigerant to the second refrigerant discharge hole.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: November 16, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tadashi Yamaguchi, Takuro Kamada, Masahiko Mizuguchi, Kojiro Ohsaki
  • Patent number: 11172308
    Abstract: An electric motor including two magnetic assemblies each having an even number of magnets in a circular arrangement, the magnets arranged in a bucking configuration with like poles directed at each other. There are a plurality of ferrous members for each of the magnetic assemblies arranged between each of the magnets. The ferrous members having a face that is directed radially toward a face of another ferrous member of the corresponding magnetic assembly. An electromagnetic assembly has a plurality of electromagnetic members arranged in a generally circular arrangement and is located radially between the two magnetic assemblies. Each electromagnetic member has a ferrous element with an electrical conductor wound around the ferrous element, each ferrous element having an inward and outward face respectively being directed to the ferrous members of the two magnetic assemblies as they pass each other as the magnet assemblies rotate relative to the electromagnetic assembly.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: November 9, 2021
    Inventor: Curtis E. Graber
  • Patent number: 11095196
    Abstract: A manufacturing method of a motor core includes laminating in an axial direction steel plates extending in a radial direction with respect to a central axis, each of the laminate steel plates including a base portion on a radially outer side of the central axis, annular portions separately disposed on a radially outer side of the base portion with penetrating portions therebetween, and connecting portions at predetermined intervals in a circumferential direction to extend in the radial direction and connect the base portion and the annular portions, the annular portions including coupling portions adjacent to both circumferential sides of the connecting portions, and cutting at least one of the two coupling portions adjacent to one connecting portion in the circumferential direction from an outer side to an inner side of the laminate steel plates in the radial direction with respect to the laminate steel plates that are laminated.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: August 17, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Takeshi Honda, Hiroshi Kitagaki
  • Patent number: 11095195
    Abstract: A method of assembling an electric motor or generator having an annular first element mounted on a circumferential mounting surface of a second element, the method comprising placing a heating coil within an inner annular surface of the annular first element; applying a current to the heating coil to heat the inner annular surface of the annular first element to a temperature that results in the inner annular surface of the annular first element increasing in diameter to allow the annular first element to be mounted on or over the circumferential mounting surface of the second element; and cooling the annular first element to form an interference fit between the annular first element and the circumferential mounting surface of the second element.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: August 17, 2021
    Assignee: PROTEAN ELECTRIC LIMITED
    Inventor: Samuel Broadbridge
  • Patent number: 11088601
    Abstract: This method includes: a coil assembly step of combining a plurality of coil units to form a coil basket; a core insertion step of inserting inner cores of in the radial direction to the coil basket; and a fixation member insertion step of inserting a fixation member to the outer circumference of the inner core. In the core insertion step, the radial-direction position of the coil basket is retained at a core insertion time position shifted outward in the radial direction relative to a normal position after armature completion, and the inner cores are inserted in the radial direction to the coil basket. After the core insertion step, the radial-direction positions of the coil basket and the inner cores are moved inward in the radial direction to the normal position after armature completion.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: August 10, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tatsuro Hino, Yuichiro Ikeuchi, Kohei Egashira, Tetsuya Yokogawa, Masashi Nakamura, Masaya Inoue
  • Patent number: 11081917
    Abstract: An electric machine includes at least one rotor module. A rotor module includes a rotor hub having a hub body, and a plurality of first protrusions and a plurality of second protrusions. One or more first protrusions include an elongated portion and a head portion. One or more second protrusions include a wedge-shaped profile. The rotor module further includes a magnetic core having a plurality of core members disposed on the rotor hub. A core member of the plurality of core members is disposed such that the head portion of the first protrusion located between the adjacent second protrusions engages with the core member, and each of the one or more second protrusions extends at least partially in a space between adjacent core members of the plurality of core members. Moreover, the rotor module includes a permanent magnet disposed in a space between the adjacent core members.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: August 3, 2021
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: David Allan Torrey, Mohamed Osama, Joseph John Zierer, Lijun He, Andrew Thomas Cross
  • Patent number: 11056958
    Abstract: A rotor of an electric motor includes a rotating shaft, a rotor core and a commutator fixed to the rotating shaft, and a first sleeve, a second sleeve and a third sleeve arranged around the rotating shaft. The first sleeve is located on a side of the rotor core away from the commutator and abuts against the rotor core, the second sleeve is located between the rotor core and the commutator, and the third sleeve is located on a side of the commutator away from the rotor core.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: July 6, 2021
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Jingxin Shi, Sijun Zhao, Luyan Bi, Pingman Zhang, Xionghui Liu, Lang Dai, Cong Lv, Feifei Huang, He Chi, Baoqiang Cheng, Seungpun Ho, Dawei Zhou, Zhijun Li, Zhiyu Chen
  • Patent number: 11052588
    Abstract: An electrically-driven rotor iron core magnetic steel chamber dispensing device is introduced. Dispensing units each include a dispensing channel, dispensing head, plunger barrel, plunger and stop-injection opening pin. The dispensing channel is above the dispensing head and in communication with the dispensing head. The dispensing head is disposed at the top of the plunger barrel and in communication with the plunger barrel. The plunger is displaced in the plunger barrel to move up and down relative to the plunger barrel. The stop-injection opening pin includes a pin body disposed vertically, arranged beside the plunger barrel, and fixed to a lower mold from inside. A pin head portion is disposed at the top of the pin body. A barb is disposed between the pin head portion and the pin body. The pin head portion protrudes into the dispensing channel, allowing molten plastic in the dispensing channel to enter the barb.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: July 6, 2021
    Assignee: GALLANT MICRO. MACHINING CO., LTD.
    Inventors: Hung-Neng Lai, Mu-Ching Chang, Chih-Hung Hsu
  • Patent number: 11038407
    Abstract: A hollow portion is formed in a holding jig. A first projection protrudes from a first inner side wall of the hollow portion. As the holding jig rotates to twist and bend a leg portion of a conductor, the projection bites into the leg portion.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 15, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Hideaki Onda, Yasuyuki Kimura, Yosuke Honda
  • Patent number: 11031831
    Abstract: An electric motor includes an annular stator and a consequent-pole-type rotor including an annular rotor core disposed on the inner side of the stator and a plurality of permanent magnets disposed inside the rotor core and arrayed in a circumferential direction of the rotor core, in which the stator is covered with an unsaturated polyester resin.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: June 8, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 11025142
    Abstract: A method of forming a rotor lamination includes, with a laser, fabricating a first region of a lamination layer with a first powdered metal having a first composition. The first region at least partially defines a magnet pocket. The method further includes, with a laser, fabricating a second region of the lamination layer with a second powdered metal having a second composition different than the first composition. The second region is disposed immediately adjacent the first region.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: June 1, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Leyi Zhu, Michael W. Degner, Feng Liang
  • Patent number: 11011950
    Abstract: The present invention may provide a rotor comprising: a rotating shaft; a yoke surrounding the rotating shaft; and a magnet coupling to the outer side of the yoke, wherein the yoke comprises a flange part, wherein the flange part comprises a groove, and the magnet comprises a protrusion that is inserted in the groove.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: May 18, 2021
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Young Dae Park
  • Patent number: 10958202
    Abstract: A rotary electric machine is equipped with a stator and a rotor. The rotor has a d-axis magnetic circuit that is produced by a magnetomotive force of a field winding, and magnet magnetic circuits that are produced by a magnetic force of permanent magnets. The d-axis magnetic circuit and a q-axis magnetic circuit have at least a part thereof that is common to both. The permeance of the d-axis magnetic circuit is smaller than the permeance of the q-axis magnetic circuit, when a load is being applied to the rotor. A control apparatus of the rotary electric machine has a switching circuit that controls the field current in the field winding, and a control section that makes the switching frequency of the switching circuit become higher when the field current is above a threshold value than when the field current is less than or equal to the threshold value.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: March 23, 2021
    Assignee: DENSO CORPORATION
    Inventors: Makoto Taniguchi, Yuuki Takahashi
  • Patent number: 10958115
    Abstract: Embodiments of laminated stator cores suitable for usage in high temperature applications are provided, as are embodiments of methods for manufacturing high temperature laminated stator core. In one embodiment, the method includes obtaining a plurality of coated laminates each comprising a laminate over which a coating precursor layer is formed. The coating precursor layer contain inorganic dielectric particles having a softening point. The plurality of coated laminates are arranged in a laminate stack, which is then fired at temperatures equal to or greater than the softening point of the inorganic dielectric particles. During firing, a compressive force is applied to the laminate stack sufficient to consolidate the inorganic dielectric particles into a plurality of coherent interlaminate dielectric layers electrically insulating and bonding together the plurality of coated laminates as the high temperature laminated stator core.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: March 23, 2021
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: James Piascik, Reza Oboodi, Paul Chipko, Martin Carlin Baker, Jimmy Wiggins, Leroy Allen Fizer
  • Patent number: 10958144
    Abstract: A method for manufacturing an induction rotor includes placing a lamination stack into a fixture in which the first end of the lamination stack is rotated in an opposite rotational direction from the second end of the lamination stack to skew the conduction bars to an angle ?. Vertical members are fixed to an outer perimeter of each of the plurality of laminates of the lamination stack. Hoop members are fixed to each of the plurality of vertical members and an outer edge of each of the plurality of conduction bars. A conduction ring is fixed on each of the ends of the lamination stack. An outer perimeter of the lamination stack is machined to remove the plurality of vertical members and the plurality of hoop members from the lamination stack.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: March 23, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: John S. Agapiou, Thomas A. Perry
  • Patent number: 10951102
    Abstract: A squirrel-cage rotor having at least one laminated rotor core and a method of manufacturing the same are provided. Short-circuit rings in the squirrel-cage rotor are provided with at least two metal composite discs. A metal composite disc includes at least a first metal disc and a second metal disc connected to the first metal disc, where the second metal disc is made of a different material from the first metal disc. Adjacent metal composite discs are arranged such that the first metal discs face one another. The short-circuit rings are attached at an end face to the rotor core. Conductive rotor bars are attached to the first metal disc in the region of slots arranged in the outer periphery of the short-circuit rings.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: March 16, 2021
    Assignee: WIELAND-WERKE AG
    Inventors: Gerhard Thumm, Volker Voggeser
  • Patent number: 10923977
    Abstract: A motor for a surgical instrument includes a rotor and a stator. The rotor includes a shaft and a magnet. The stator includes (i) a cavity in which the rotor is disposed, and (ii) a coil assembly. The coil assembly includes multiple phase sets. The phase sets include multiple sets of wires. Each of the phase sets includes multiple coils and corresponds to a respective one of the sets of wires. The coils in each of the phase sets are at respective positions about the rotor. One of the sets of wires includes at least three wires. The stator causes the rotor to axially rotate a surgical tool of the surgical instrument based on current received at the sets of wires.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: February 16, 2021
    Assignee: Medtronic Xomed, Inc.
    Inventors: Manfred K. Luedi, Vikram A. Garadi, Thierry A. Bieler, Christian R. Koechli
  • Patent number: 10886812
    Abstract: A stator of the present invention includes: a stator core; a front housing which is arranged on a front end portion side of the stator core; and a back housing which is arranged on a back end portion side of the stator core, where the stator further includes: a first sealant which is individually provided between the stator core and the front housing and between the stator core and the back housing; and a second sealant which is provided so as to coat the outer side of the stator core in a radial direction with the first sealant, and the first sealant and the second sealant are formed of the same curable resin integrally with each other. A motor of the present invention includes the stator and a rotor which is supported on the inner side of the stator such that the stator can be rotated with respect to the stator.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: January 5, 2021
    Assignee: FANUC CORPORATION
    Inventor: Leo Arai
  • Patent number: 10868455
    Abstract: A rotor of a current-activated electric machine has a plurality of windings which are arranged on the rotor, slots being formed between the windings. A textile has a plurality of fibers connected to one another in flat contact. The textile is arranged in at least one slot, and the textile is impregnated with a filling material which in the normal operational state of the rotor is in a solid state.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: December 15, 2020
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Thorsten Rienecker, Dragoljub Duricic
  • Patent number: 10848039
    Abstract: A method of manufacturing a rotor core having a plurality of core members stacked together includes determining weight imbalances for the plurality of core members with respect to a central axis of the rotor core; combining the weight imbalances of the plurality of core members to determine a weight distribution of the rotor core; and displacing the weight imbalances of one or more of the plurality of core members to adjust a position of the weight distribution of the rotor core with respect to the central axis.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: November 24, 2020
    Inventors: Akira Nagai, Kenji Katsuki, Go Kato
  • Patent number: 10833622
    Abstract: In an electrified vehicle having a synchronous traction motor, an inverter is connected to stator windings by three power cables. If these cables are accidentally connected to the wrong windings, the resulting torque will not match the desired torque, and may even be in the wrong direction. To avoid this problem, a test is performed any time that the cables may have been unplugged and re-connected. The inverter is commanded to generate a rotating magnetic field while the rotor is held stationary, resulting in a positive and a negative response current. A relationship between a phase angle of the negative response current and the rotor position indicates which cables are connected to which windings. If the cables are incorrectly connected, the controller disables the motor and informs an operator which cables to swap to achieve correct connection.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: November 10, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Silong Li, Wei Xu, Jiyao Wang, Yinghan Xu
  • Patent number: 10826363
    Abstract: Electrical machines, components thereof, and methods for manufacturing the same are provided. In one aspect, methods for additively manufacturing a rotor assembly for an electrical machine is provided. The method includes additively printing the rotor core and shaft of the same material composition. In another aspect, an electrical machine is provided. The electrical machine includes a stator assembly that includes a stator core having a plurality of poles with magnetic slot wedges positioned between adjacent poles to reduce tooth harmonics. The electrical machine also includes a rotor assembly having a rotor core that is formed as a solid core. In yet another aspect, a rotor assembly for an electrical machine is provided that includes slots that reduce eddy current losses in the rotor core during operation of the electrical machine.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: November 3, 2020
    Assignee: GE Aviation Systems LLC
    Inventors: Hao Huang, Xiaochuan Jia
  • Patent number: 10821637
    Abstract: A resin injection apparatus includes: a mold die and a receiving die configured to hold a core body in an axial direction of the core body, the core body having a resin formation region serving as a region where resin is to be formed by injection of molten resin; a plurality of plungers; and a pot group attached to the mold die, the pot group including a plurality of pots proximately located next to each other in a direction. Each of the plurality of pots has a through hole in which a corresponding plunger of the plungers is insertable. The plurality of pots have a first coefficient of thermal expansion that is lower than a second coefficient of thermal expansion of the mold die.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: November 3, 2020
    Inventor: Hirotoshi Mabu
  • Patent number: 10807852
    Abstract: An electrically-driven rotor iron core magnetic steel chamber dispensing device effectuates dispensing in the gap between a magnetic steel chamber and a magnetic steel chunk of an electrically-driven rotor iron core. The electrically-driven rotor iron core magnetic steel chamber dispensing device includes a plurality of dispensing units each corresponding in position to one or more magnetic steel chambers. The dispensing units correspond in position to the magnetic steel chamber and are arranged in the circumferential direction of the electrically-driven rotor. The dispensing units are arranged outside the magnetic steel chamber and positioned proximate to the magnetic steel chamber or is located in the direction of the projection of the magnetic steel chamber. A dispensing opening of each dispensing unit corresponds in position to the magnetic steel chamber from below.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: October 20, 2020
    Assignee: GALLANT MICRO. MACHINING CO., LTD.
    Inventors: Hung-Neng Lai, Mu-Ching Chang, Chih-Hung Hsu
  • Patent number: 10804776
    Abstract: An injection molding device includes: a lower die that supports a rotor core; an intermediate die including a magnetizing mechanism; and an upper die including an injection die having a gate formed therein through which a molten bonded-magnet material supplied from a supply source is injected into a magnet insertion hole in the rotor core. The injection die has a cylindrical protruding portion at an end surface of which the gate is open. In the protruding portion, a magnetic-flux applying member containing ferromagnetic material is embedded with its side surface exposed at an outer peripheral surface of the protruding portion. The magnetizing mechanism is formed in an annular shape that can accommodate, inside its inner periphery, the rotor core and a distal end portion of the protruding portion by disposing yokes and permanent magnets alternately in the circumferential direction. Magnetic-path surfaces of the yokes radially face the side surface.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: October 13, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Koji Tachi, Hiroshi Yoshikawa, Naotake Kanda, Taiki Takeuchi, Shohei Ogi
  • Patent number: 10784730
    Abstract: A rotor of a synchronous motor has a rotor core and a permanent magnet. The rotor core has a plurality of magnet insertion apertures and a plurality of slits. The permanent magnet is disposed in each of the magnet insertion apertures such that the magnetic poles of the permanent magnets are directed in a diameter direction. The slits are formed on an radially outer side of the magnet insertion aperture so as to align with intervals along a side of the permanent magnet. Magnetic paths are defined between adjacent slits. A gap that is a slot open in the axial direction of the rotor core is formed on the opposite side from a plurality of magnetic paths across the permanent magnet to adjust the magnetic resistance of the magnetic paths for making a change in magnetic flux between adjacent magnetic paths small.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: September 22, 2020
    Assignee: OKUMA CORPORATION
    Inventors: Takanori Yokochi, Tatsuya Shizu
  • Patent number: 10749419
    Abstract: A process for assembling a brushless motor-generator includes assembling a rotor formed from two spaced apart rotor portions having magnetic poles that drive magnetic flux circumferentially through the rotor portions and back and forth across an armature airgap formed between the rotor portions. An air core armature is formed by coating a substantially nonmagnetic armature form with a tacky adhesive layer, and winding armature windings into a winding pattern onto the substantially nonmagnetic form using wire made of multiple individually insulated conductor strands that are electrically connected in parallel but are electrically insulated from each other along their length when located inside the armature airgap, wherein the strands of said wire are diametrically held together by an outer serve. The winding of the armature form includes sequentially applying pressure to sections of said wire against the tacky adhesive layer.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: August 18, 2020
    Assignee: Revolution Electric Motor Company, Inc.
    Inventors: Christopher W. Gabrys, Timothy S. Rodgers
  • Patent number: 10742099
    Abstract: An apparatus for mounting a magnet to a rotor or stator of an electric machine includes a mounting element having a second mounting surface, wherein the mounting element is arranged to magnetically interact with the magnet to allow a magnetic force to magnetically attach the magnet to the second mounting surface; means for moving the mounting element having the magnet magnetically attached to the second mounting surface to a predetermined distance from a first mounting surface of the rotor or stator; and means for moving the mounting element away from the first mounting surface when the mounting element is at the predetermined distance from the first mounting surface. The apparatus further includes means for varying the flux density between the mounting element and the magnet.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: August 11, 2020
    Assignee: PROTEAN ELECTRIC LIMITED
    Inventor: Samuel Broadbridge
  • Patent number: 10727711
    Abstract: A motor rotor is configured to include a tubular inner sleeve, an annular magnet mounted on the outside of the inner sleeve in a radial direction of the inner sleeve, and a ring member disposed on the outside of the magnet in an axial direction of the inner sleeve and mounted on the outside of the inner sleeve in the radial direction of the inner sleeve. A linear expansion coefficient of the inner sleeve is higher than the linear expansion coefficient of the magnet. The ring member is mounted on the inner sleeve by shrinkage-fitting, and a gap is provided between the ring member and the magnet in the axial direction of the inner sleeve.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: July 28, 2020
    Assignee: IHI Corporation
    Inventor: Takuya Ozasa
  • Patent number: 10720808
    Abstract: A method of making a permanent magnet rotor includes interference fitting pressure tools into bores in a rotor core as to deform material of the rotor core outwardly to bias permanent magnets mounted thereon in a radially outward direction against a fixation sleeve.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: July 21, 2020
    Assignee: Ingersoll-Rand Industrial U.S., Inc.
    Inventors: Esa H. Vikman, Petri Juhani Maki-Ontto, Fredrik Andreas Boxberg
  • Patent number: 10720822
    Abstract: In a brushless motor comprising a stator core having a plurality of teeth that protrude therefrom in radial directions, a front insulator which is attached to the stator core and which has a plurality of insulating portions that protrude therefrom along the direction of protrusion of the respective teeth, and a plurality of coils formed by magnet wire wound about each of the insulating portions at the respective teeth, a top face of the respective insulating portions of the front insulator is provided in advance with a deformable rib which is capable of being deformed by tension of the magnet wire wound thereabout, and the magnet wire is wound about the deformable rib to form the coils as the deformable rib is made to deform in correspondence to the external shape of the magnet wire.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: July 21, 2020
    Assignee: MAKITA CORPORATION
    Inventor: Akira Niwa
  • Patent number: 10703037
    Abstract: A carrier assembly for injection molding a parison with internal threads. The carrier assembly may be used with an injection stretch blow molding machine that includes a core rod. The carrier assembly comprises a carrier insert surrounding a portion of the core rod. The carrier insert includes a thread-forming portion presenting an interior radial surface and an exterior radial surface. The interior radial surface is configured to be positioned adjacent to the core rod, and the exterior radial surface includes a threaded protrusion configured to extend away from the core rod. The carrier assembly also includes a pinion insert surrounding at least a portion of the threaded protrusion of the thread-forming portion of the carrier insert. The pinion insert is spaced apart from the thread-forming portion of the carrier insert so as to present a thread-forming cavity between the pinion insert and the carrier insert.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: July 7, 2020
    Assignee: R & D Tool & Engineering Co.
    Inventor: Michael J. Wilkerson
  • Patent number: 10707711
    Abstract: A rotor includes: a rotating member; a permanent magnet arranged in a plurality of rows along a circumferential direction of the rotating member and divided into a plurality of parts in a rotational axis direction X of the rotating member; and a cover tube divided into a plurality of parts in the rotational axis direction of the rotating member and covering an outer circumferential surface of the permanent magnet, the cover tube being formed of a fiber-reinforced plastic, wherein the plurality of permanent magnets in each row are arranged in an oblique direction with respect to the rotational axis direction of the rotating member, and the permanent magnets adjacent to the arrangement direction are disposed to be skewed in the circumferential direction, and at least one of the divided cover tubes covers an outer circumferential surface of one of the divided permanent magnets in the circumferential direction of the rotating member.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: July 7, 2020
    Assignee: FANUC CORPORATION
    Inventors: Shinobu Takano, Hisashi Maeda, Takafumi Kajiya
  • Patent number: 10700582
    Abstract: A squirrel-cage rotor of an asynchronous machine has a rotor bar (4) in a rotor stack (1), wherein the bar (4) can be tipped at a tipping point (11, 12, 13) when the bar (4) has not yet been cast. The rotor bar (4) can in this case have a contour on a radial outer face, wherein the bar (4) can also have a channel (27), the opening (29) in said channel being wider than the shoulders (32, 33) of the limbs (30, 31) which form the channel (27).
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: June 30, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Klaus Büttner, Michael Müller, Norbert Wöhner
  • Patent number: 10666101
    Abstract: A rotor for a rotary electric machine includes a rotor core including at least one low-rigidity portion rigidity; a plurality of magnets; a rotary shaft; a washer contacting at least one end surface of the rotor core in an axial direction of the rotor core; and a nut. An outer circumferential end of the washer is disposed more radially inward than the magnet holes, the washer has an outer circumferential shape with recesses and projections in which a distance from a rotation center to the outer circumferential end of the washer periodically varies, and a distance from the outer circumferential end of the washer to each low-rigidity portion is greater than a distance from the outer circumferential end of the washer to each magnet hole.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: May 26, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiichi Kaneshige, Yuma Ishikawa
  • Patent number: 10648539
    Abstract: Electric motors are disclosed. The motors are preferably for use in an automated vehicle, although any one or more of a variety of motor uses are suitable. The motors include lift, turntable, and locomotion motors.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: May 12, 2020
    Assignee: Nidec Motor Corporation
    Inventors: William D. Moore, Philip S. Johnson, Joshua M. Biro, Paul G. Michaels, Payman Rassoolkhani
  • Patent number: 10608488
    Abstract: In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: March 31, 2020
    Assignee: REGAL BELOIT AMERICA, INC.
    Inventors: Subhash Marutirao Brahmavar, Lester Benjamin Manz, Ludovic Andre Chretien, Changiz Rashidzadeh, Dan Mircea Ionel
  • Patent number: 10601289
    Abstract: The method according to the invention involves a hot-forging step and a cold-forging step that occurs after the hot-forging step. A polar wheel (10, 11) incorporating a plurality of finite chamfers (102) formed on exterior parts of the polar teeth (10g, 11g) is produced during the hot-forging step. According to the invention, the cold-forging step involves substeps of placing the polar wheel in a die, cold die-stamping the polar wheel with a first and a second blow in the axial direction of the polar wheel, upsetting material onto interior parts of the polar teeth (10g, 11g) so as to form magnet-housing grooves (100) and magnet lips (101).
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: March 24, 2020
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Henri Delianne, Michel Bocquel, Herve Ribot
  • Patent number: 10566860
    Abstract: The present invention discloses a motor comprising: a stator part; and a rotor assembly rotatably disposed with respect to the stator part, wherein the rotor assembly comprises: a ring magnet including an insertion hole with a shaft disposed therein and a plurality of first grooves formed at one side thereof along a first imaginary circle; and a core member including a body portion disposed between the shaft and the insertion hole, and an extension portion covering the plurality of first grooves, wherein the extension portion comprises a plurality of second grooves deviated from a plurality of first imaginary straight lines which pass from a center of the first imaginary circle respectively through the plurality of first grooves.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: February 18, 2020
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Il Sik Won
  • Patent number: 10536060
    Abstract: A method for producing an electric rotary machine including a rotor magnetic mass formed by a stack of superimposed electrical sheets containing housings, and a plurality of permanent magnets inserted in the housings, the housings being provided with a plurality of lugs for locking the permanent magnets in the housings.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: January 14, 2020
    Assignee: MOTEURS LEROY-SOMER
    Inventors: Alban Marino, François Turcat, Stéphane Dufau, Mario Pereira
  • Patent number: 10516324
    Abstract: A step motor includes a stator and a rotor. The stator includes a stator core and stator windings. The stator core includes a ring shaped yoke and a plurality of teeth extending inwardly from the ring shaped yoke. The rotor is rotatably mounted with respect to the stator. The rotor includes a permanent magnet member surrounded by the plurality of teeth. The stator windings are wound around the plurality of teeth to form a plurality of stator poles. The stator core are formed from a core strip with High magnetic conductive, the core strip are bent to enable opposite ends of the core strip to be connected with each other. The step motor of the present invention has a simplified structure and enhanced efficiency.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: December 24, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yue Li, Chui You Zhou, Yong Wang, Yong Li
  • Patent number: 10511198
    Abstract: There is provided a rotor for a rotary electrical machine for improving mechanical strength of the rotor against centrifugal force. The rotary electrical machine is provided with a stator, and a rotor disposed with a gap from the stator, which has a rotor core. The rotor includes a magnet insertion hole, and a permanent magnet inserted into the magnet insertion hole. A clearance part is formed at a position of the magnet insertion hole corresponding to a corner of the inserted permanent magnet, which has a facing surface that is formed to face a surface of the permanent magnet via a gap. The facing surface of the clearance part has inflection points so that each of obtuse angles is formed by the two facing surfaces contiguous with the inflection points.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: December 17, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yuji Kano, Hiroshi Hamano, Yasuyuki Saito, Ryoji Kobayashi, Yosuke Umesaki, Manabu Oshida
  • Patent number: 10505432
    Abstract: A rotor includes: conductors having a bar shape; a first end ring joined to one ends of the conductors by friction stir welding, at least a surface opposite to a surface from which the conductors extend being stirred by the friction stir welding; a second end ring joined to other ends of the conductors by friction stir welding, at least a surface opposite to a surface from which the conductors extend being stirred by the friction stir welding; and an iron core disposed between the first and the second end rings, having a cylindrical shape, and including a plurality of insertion holes through which the respective conductors are insertable in a central axis direction of the iron core.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: December 10, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Noriyoshi Kaneda, Shota Nishihama
  • Patent number: 10498202
    Abstract: The manufacturing method for a rotor includes steps of: applying an adhesive to a first surface of a magnet material member that becomes a permanent magnet after magnetization, the adhesive being applied such that a total thickness of the magnet material member and the adhesive is less than a radial width of a magnet insertion aperture; disposing a rotor core such that an axial direction thereof is horizontal, and inserting the magnet material member into a magnet insertion aperture that is positioned vertically uppermost among the magnet insertion apertures so as to orient the adhesive vertically upward; positioning each of the magnet material members by pressing the magnet material member against an inner wall surface on an outer circumferential side of the magnet insertion aperture after inserting the magnet material member into each of the magnet insertion apertures; and curing the adhesive after the magnet material member is positioned.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: December 3, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hirohisa Yokota, Akihiro Yamamura, Yoshinobu Sugimoto, Shinji Sano
  • Patent number: 10491062
    Abstract: A rotor may include a planar lamination having permanent magnets arranged therein, and an inner edge defining an opening configured to receive a driveshaft. The planar lamination may include a driveshaft key, and a relief notch and scallop disposed on each side of the driveshaft key. The relief notch and scallop may distribute stress imparted to the driveshaft key and reduce deformation due to centrifugal loads during rotation of the rotor. The relief notches may be next to the driveshaft key. The relief notches may be sandwiched between the scallops. The inner edge may include additional scallops.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 26, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Benedikt Groschup, Franco Leonardi
  • Patent number: 10490790
    Abstract: Provided is a battery module, which includes an array for battery cells, an elastic body disposed with respect to the array, a restraining member that restrains the array via the elastic body in an arranging direction of the battery cells, a plurality of harnesses that extend in the arranging direction and have connecting terminals of tips thereof connected to electrode terminals of the predetermined battery cells, and a binding member that binds the plurality of harnesses into a harness bundle. A binding position of the harnesses which is caused by the binding member is located at a side opposite to the elastic body relative to a connecting position between the electrode terminal and the connecting terminal, and the harness that branches off from the binding member has a flexure between the binding position and the connecting position.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: November 26, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masahiro Yamada, Hiromi Ueda, Hirokuni Akiyama