Embedded In A Core Patents (Class 310/156.53)
  • Patent number: 11362574
    Abstract: A rotor for a synchronous reluctance machine includes a rotor core having a plurality of magnetically conductive laminations stacked in a rotor axial direction. The magnetically conductive laminations include cut-out portions forming a plurality of flux barriers radially alternated by flux paths portions, where at least one of the flux barriers includes a ridge connecting two flux paths portions adjacent to the at least one flux barrier. The at least one flux barrier has a first barrier mid-line, which is a line that is equidistant from both sides of the at least one flux barrier. The bridge has a second bridge mid-line, which is the line that is equidistant from both sides of the bridge. The first and second mid-lines intersect. The bridge has a first and second symmetry axis and is non-symmetrical with respect to at least one of the first and second symmetry axis.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: June 14, 2022
    Assignee: ABB Schweiz AG
    Inventors: Pietro Savio Termini, Alessandro Castagnini, Giovanni Tartaglino, Michele Maggi, Jere Kolehmainen, Tero Kansakangas
  • Patent number: 11349361
    Abstract: A rotor core which includes: a first hole portion group; and a second hole portion group. Each hole portion of the second hole portion group is arranged to intersect with a virtual extension line of a rib formed between the adjacent hole portions of the first hole portion group, and includes: a first and second end portions; an outer radial side apex portion; and an outer peripheral wall. The outer radial side apex portion is located at an intersection point between a virtual line which is orthogonal to a virtual line connecting the center of the rotor core and the first end portion and passes through the first end portion and a virtual line which is orthogonal to a virtual line connecting the center of the rotor core and the second end portion and passes through the second end portion or is located radially outward of the intersection point.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: May 31, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Tatsuya Ohzu
  • Patent number: 11349362
    Abstract: A rotor includes: a rotor core having a rotor shaft hole into which a rotor shaft is tightened and a plurality of magnet insertion holes provided along a circumferential direction; and a plurality of magnetic pole portions constituted by magnets inserted into the magnet insertion holes. The rotor core includes a cooling portion having a plurality of refrigerant flow passage holes provided radially inward of the plurality of magnetic pole portions and arranged along a circumferential direction, the plurality of refrigerant flow passage holes are arranged on both circumferential end portion sides of each magnetic pole portion, the refrigerant flow passage hole includes an inner radial side apex portion protruding radially inward, and an outer peripheral wall of the refrigerant flow passage hole includes an outer radial side apex portion protruding radially outward.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: May 31, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tatsuya Ohzu, Masato Kawano, Noriaki Fujita
  • Patent number: 11342821
    Abstract: In a method for manufacturing a rotor, each of adhesive placement portions that are provided between a surface of a permanent magnet on the radially inner side and grooves is formed so as to cover a part of an adhesive applied to the permanent magnet on the radially inner side and parts of the adhesive on both sides in the circumferential direction.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: May 24, 2022
    Assignee: AISIN CORPORATION
    Inventors: Hideharu Ushida, Tetsuya Matsubara, Tetsuya Takahashi
  • Patent number: 11336135
    Abstract: Disclosed is a motor rotor structure including a rotor core. A plurality of radial slots each are in the rotor core along a circumferential direction, and a first flux barrier slot is provided between every two adjacent radial slots. Two kinds of permanent magnets having different coercivities mounted in each radial slot. The two kinds of permanent magnets having different coercivities are distributed along a radial direction of the rotor core. The two kinds of permanent magnets having different coercivities are both magnetized along a tangential direction of the rotor core. A second flux barrier slot is provided between the two kinds of permanent magnets having different coercivities.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: May 17, 2022
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Min Wang, Yong Xiao, Quanfeng Li
  • Patent number: 11336136
    Abstract: A stacked core includes: a stack formed by stacking a plurality of blanked members and including a first end surface and a second end surface; a first distinguishing hole formed in the stack and being open at the first end surface; and a second distinguishing hole formed in the stack and being open at the first end surface. The spatial shape of the first distinguishing hole is different from the spatial shape of the second distinguishing hole.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: May 17, 2022
    Assignees: Mitsui High-tec, Inc., HONDA MOTOR CO., LTD.
    Inventors: Akira Hyoguchi, Kenta Uchida
  • Patent number: 11322996
    Abstract: A motor includes a rotation shaft, a rotor, and a stator. The rotor includes a rotor core and magnetic pole portions respectively including permanent magnets embedded in the rotor core. The magnetic pole portions have polarities that differ alternately in a circumferential direction. A projection projecting radially outward from an outer circumferential portion of the rotor core is arranged between the magnetic pole portions having different polarities. In a radial opposing relationship of the rotor core and the teeth taken at different times while the rotor is revolved once, at a certain time, a quantity of the teeth that oppose one of the magnetic pole portions and do not oppose the projection is greater than a quantity of the teeth that simultaneously oppose two of the magnetic pole portions adjacent to each other in the circumferential direction and the projection located in between the magnetic pole portions.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: May 3, 2022
    Assignee: DENSO CORPORATION
    Inventors: Koji Mikami, Akihiro Utsumi, Yoshiaki Takemoto, Koji Hotta
  • Patent number: 11323014
    Abstract: The disclosure discloses a driving motor with an asymmetrical magnetic pole type of permanent magnet and claw pole electric excitation for an electric automobile which includes a front end cover, a rear end cover, a housing, an asymmetric magnetic pole type of permanent magnet rotor, a claw pole electric excitation rotor, and a stator. Wherein the asymmetric magnetic pole type of permanent magnet rotor is provided with first magnetic pole groups and second magnetic pole groups, the first magnetic pole groups and the second magnetic pole groups are of an asymmetric structure, polarities of outer sides of the first magnetic pole groups and the second magnetic pole groups are distributed in a manner of N poles and S poles arranged at intervals. A utilization of inner space of the motor rotor can be improved, the performance of the motor is improved, and the costs of the motor are reduced.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: May 3, 2022
    Assignee: SHANDONG UNIVERSITY OF TECHNOLOGY
    Inventors: Xueyi Zhang, Wenjing Hu, Yulong Lei, Shanjian Wang, Hongbin Yin, Huihui Geng
  • Patent number: 11322997
    Abstract: The invention relates to a rotor for a synchronous drive motor of an electrically driven motor vehicle having several rotor poles, wherein each rotor pole has at least three magnetic layers arranged radially one after the other with cavities, wherein an outermost magnetic layer includes at least one cavity filled with permanent magnetic material and each further magnetic layer includes at least two cavities filled with permanent magnetic material, furthermore each magnetic layer has an extension of a section of an ellipse, furthermore the central points of all ellipses lie within the smallest ellipse of the outer magnetic layer, wherein each cavity belonging to one of the at least three magnetic layers defines an interface in a radial plane, and each of these interfaces of a magnetic layer of the corresponding ellipse is divided into two partial interfaces, wherein bars made of the rotor material are formed in the second and every other magnetic layer between the cavities, and these bars, at the narrowest poi
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: May 3, 2022
    Assignee: BRUSA Elektronik AG
    Inventors: Tian Zhou, Daniel Oeschger, Raphael Teufel, Adina Muntean
  • Patent number: 11309757
    Abstract: A rotor of a rotating electrical machine includes: a rotor core with a plurality of magnet insertion holes; and a plurality of magnetic pole portions including permanent magnets inserted into the plurality of magnet insertion holes. A space portion is provided between a space portion forming surface of at least one of the outer diameter surface and the inner diameter surface of the permanent magnet and a wall surface of the magnet insertion hole facing the space portion forming surface. The space portion includes: a liquid medium storage region provided in a center in the circumferential direction, and liquid medium throttle regions provided at both end portions in the circumferential direction, and a distance between the permanent magnet and the magnet insertion hole in the liquid medium throttle region is shorter than a distance between the permanent magnet and the magnet insertion hole in the liquid medium storage region.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: April 19, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Tatsuya Ohzu
  • Patent number: 11271443
    Abstract: A rotor core for a rotary electric machine, includes: a shaft hole into which a shaft rotating about a rotation axis is inserted and fixed; an inner ring portion provided with the shaft hole therein and having an outer edge in a circular shape coaxial with the rotation axis; an outer ring portion coaxial with the rotation axis and disposed radially outward of the inner ring portion; a connection ring portion coaxial with the rotation axis and disposed between the inner and outer ring portions; inner ribs interconnecting the inner and connection ring portions and extending in a crossing direction to the rotation axis; and outer ribs interconnecting the connection and outer ring portions and extending in the crossing direction. The inner and outer ribs are disposed respectively in different phases in a peripheral direction of the connection ring portion.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: March 8, 2022
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takahiro Yoneda, Toshiya Sugiyama, Akifumi Kurokawa
  • Patent number: 11264880
    Abstract: A permanent magnet motor includes a rotor having a field pole of a rotor core, wherein the field pole has a radius smaller than an arc centered on a shaft of the rotor, a multiple of slits are formed in the field pole, the multiple of slits are disposed so that an interval between a first central line positioned between a multiple of the slits and a second central line positioned between a neighboring multiple of the slits increases as the first central line and the second central line head toward an outer peripheral side of the rotor core, and of the multiple of slits of the field pole, a first slit disposed in a central position of the field pole, and a second slit and a third slit disposed on either side of the first slit, are disposed within 20% of a circumferential direction width of the permanent magnet.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: March 1, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takizawa, Hiroko Ikeda, Shinichi Yamaguchi, Yu Hirotani, Masafumi Okazaki, Satoru Akutsu
  • Patent number: 11258319
    Abstract: A motor includes a rotor rotatable in a rotating direction about an axis, and a stator surrounding the rotor. A rotor core includes a magnet insertion hole corresponding to one magnetic pole, and a plurality of slits on an outer side of the magnet insertion hole in the radial direction. The slits include a first slit located most upstream in the rotating direction. Each slit has a tip portion and a root portion. The tip portion of the first slit is located upstream of the root portion of the first slit in the rotating direction, and is located upstream of a magnetic pole center in the rotating direction. The root portions of the slits are disposed more in number in a second region downstream of the magnetic pole center in the rotating direction than in a first region upstream of the magnetic pole center in the rotating direction.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: February 22, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhiko Baba
  • Patent number: 11251665
    Abstract: The present invention discloses a motor rotor and a permanent magnet motor. The motor rotor includes a rotor core and a plurality of magnetic poles provided in the rotor core, wherein each magnetic pole includes a first permanent magnet, a second permanent magnet and a third permanent magnet; the first permanent magnet being arranged on a central position of the magnetic pole on which said first permanent magnet is located, the second permanent magnet being arranged at two sides of the first permanent magnet, the third permanent magnet being arranged at one side of the second permanent magnet far away from the first permanent magnet; the coercivity of the first permanent magnet is smaller than that of the second permanent magnet and that of the third permanent magnet; and the third permanent magnet is arranged on a q axis of the motor.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: February 15, 2022
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Yusheng Hu, Bin Chen, Bo Zhou, Min Wang, Yong Xiao
  • Patent number: 11239713
    Abstract: A rotor structure of a motor includes a rotor core formed by laminating a plurality of laminated steel plates, a permanent magnet, and end plates. First holes and second holes are perforated alternately in a circumferential direction at equal intervals. The end plates have holes. The end plates are respectively fixed to end portions of the rotor core by fastening members inserted to the holes and the first holes. When the rotor core is divided into first laminated portions and a second laminated portion, in the second laminated portion, the plurality of the laminated steel plates adjacent to the first laminated portions are rotationally laminated in such a manner that the second holes are connected to the first holes.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: February 1, 2022
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Naotaka Toida
  • Patent number: 11233434
    Abstract: A rotor includes: a rotor core having: a rotor shaft hole; and a plurality of magnet insertion holes; and a plurality of magnetic pole portions. The rotor core includes a plurality of refrigerant flow passage hole portions. A refrigerant flow passage hole portion includes: a first refrigerant flow passage hole located on a virtual line connecting a circumferential center of each magnetic pole portion and a center of the rotor core; and a pair of second refrigerant flow passage holes facing each other across the first refrigerant flow passage hole on both circumferential end portion sides of each magnetic pole portion. The first refrigerant flow passage hole and the pair of second refrigerant flow passage holes include inner radial side apex portions protruding radially inward. Outer peripheral walls of the pair of second refrigerant flow passage holes include outer radial side apex portions protruding radially outward.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: January 25, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Tatsuya Ohzu
  • Patent number: 11233433
    Abstract: A virtual circle included in the through-hole as viewed from the axial direction is assumed in the through-hole. An inner peripheral surface of the through-hole includes a first side that is located on a radial inside with respect to the virtual circle and extends along the circumferential direction, a second side that is located on one side in the circumferential direction with respect to the virtual circle and extends along the radial direction, and a third side that is located on another side in the circumferential direction with respect to the virtual circle and extends along the radial direction. The second side and the third side contact with the virtual circle. The first side extends linearly or extends radially outward in a curved manner when viewed from the axial direction.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: January 25, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Tomoki Iga, Hiroshi Nagano
  • Patent number: 11205942
    Abstract: A motor includes an annular core formed by stacking a plurality of electromagnetic steel sheets; end plates disposed at both ends of the core in an axial direction; a balance weight disposed on a side of one of the end plates, the side being opposite the core; and a spacer disposed between the one of the end plates and the balance weight, the spacer being configured to create a space between the one of the end plates and the balance weight. The motor is entirely fastened by allowing at least one of a plurality of rivets arranged in a circumferential direction of the core to pass through the core and the end plates in the axial direction, and allowing remaining at least one rivet to pass through the core, the end plates, the spacer, and the balance weight in the axial direction.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: December 21, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryohei Uno, Koji Masumoto, Yuki Tamura, Kenjiro Motomura, Yusuke Nakagawa, Kei Iwata
  • Patent number: 11190070
    Abstract: A rotor for a rotating electrical machine, the rotor including: a rotor core having a plurality of magnetic poles; and a plurality of permanent magnets arranged in the rotor core, wherein: in each of the plurality of magnetic poles, the rotor core has a plurality of holes including a first hole and a second hole in each of which a respective permanent magnet of the plurality of permanent magnets having a planar magnetic pole surface is arranged.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: November 30, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Naoto Saito, Masayuki Ikemoto, Tsuyoshi Miyaji
  • Patent number: 11190067
    Abstract: A rotor core of a magnet-embedded electric motor includes a first tubular member and a second tubular member coaxially fixed to a shaft. The first tubular member includes a magnet fixing hole in which the magnet is fixed and a recess formed in an outer circumferential surface. The second tubular member includes a magnet fixing hole in which the magnet is fixed. The magnet fixing hole includes an arrangement region where the magnet is arranged, and an escape region having a size that allows magnet fixing agent to accumulate. The arrangement region of the first tubular member communicates with the arrangement region of the second tubular member, and the recess of the first tubular member communicates with the escape region of the second tubular member.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: November 30, 2021
    Assignee: FANUC CORPORATION
    Inventor: Yohei Kamiya
  • Patent number: 11190068
    Abstract: A rotor sheet includes a central cut-out and is divided into a plurality of sectors, each including a first half sector and a second half sector delimited from the first half sector by a radial central line, wherein a through-opening configuration, which has two parallel edge lines extending along an extension direction, is formed inside the first half sector, and a further through-opening configuration, mirror-symmetrical to the through-opening configuration with respect to the central line, is formed inside the second half sector, wherein the first through-opening configuration includes a relief through-opening inscribed inside an incircle-free trapezoid having two bases extending parallel to the central line and two legs extending on a first straight line having a first angular spacing from the central line, and on a second straight line having a second angular spacing from the central line, wherein the first and second straight lines intersect at an acute angle.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: November 30, 2021
    Assignee: VALEO SIEMENS EAUTOMOTIVE GERMANY GMBH
    Inventor: Kae Shyuan Tan
  • Patent number: 11183913
    Abstract: Provided is a permanent magnet motor, comprising a rotor component and a stator component. The rotor component comprises alternating poles and permanent magnet poles alternately arranged in a circumferential direction. The stator component comprises stator teeth portions arranged and spaced apart in a circumferential direction on an inner circumferential side of the stator component. A first air gap is formed between an inner circumferential side of the stator teeth portion and an outer circumferential side of the permanent magnet pole. A second air gap is formed between the inner circumferential side of the stator teeth portion and an outer circumferential side of the alternating pole. An average thickness of the first air gap is ?1; an average thickness of the second air gap is ?2, wherein 0.4??2/?1?0.9.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 23, 2021
    Assignee: Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai
    Inventors: Yusheng Hu, Bin Chen, Quanfeng Li, Wenjiao Sun, Bo Zhou
  • Patent number: 11177704
    Abstract: An interior permanent magnet motor includes a stator provided with a plurality of slots and a rotor rotatably disposed inside the stator. A plurality of permanent magnets of the same polarity are disposed at equal intervals in a circumferential direction inside the rotor. A plurality of flux bathers are provided on left and right sides of one end of each of the plurality of permanent magnets adjacent to an outer circumferential surface of the rotor. A ratio of a number of slots of the stator to a number of magnetic poles of the rotor is 3:2 or 3:4. The number of permanent magnets provided in the rotor is ½ of the number of magnetic poles of the rotor.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: November 16, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Taeho Yoon, Junseok Kim, Hyungchul Lee, Byoungsoo Ko, Hongseok Kim
  • Patent number: 11167351
    Abstract: Rotors formed by an additive manufacturing process are presented. In one example, a method of making a rotor is presented including defining a printing order for the application of a first material, and creating a plurality of lobes arranged helically about a central opening or a shaft by adding a first material in the printing order, wherein each of the plurality of lobes defines an outer surface.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: November 9, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Tanille Jean Paniogue, Matthew James Fortini, Shravani Yerrabothu, Kevin Eric Portella, Michael John Froehlich, Michael Lee Killian
  • Patent number: 11146129
    Abstract: According to one embodiment, a rotor of an electric rotating machine includes a shaft, a rotor core, and a plurality of permanent magnets. Two first permanent magnets are arranged in line symmetry with a pole center and are arranged gradually away from the pole center as the two first permanent magnets extend from first ends toward second ends thereof. Two second permanent magnets are arranged in line symmetry with the pole center and are arranged gradually away from the pole center as the two second permanent magnets extend from third ends toward fourth ends thereof. Angles ?1, ?2 are set to satisfy the relationships of ?1>?2, and 70 degrees??2?110 degrees.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: October 12, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Masakatsu Matsubara, Yusuke Matsuoka
  • Patent number: 11121593
    Abstract: A rotor includes a rotor core and a magnet inserted into a magnet insertion hole formed in the rotor core. The magnet insertion hole extends in parallel with the rotation axis of the rotor core and, when viewed along the rotation axis, has an arcuate shape having a central portion projecting toward the rotation axis. The arcuate shape of the magnet insertion hole is formed such that the arcuate shape includes a first arcuate surface and a second arcuate surface that has a center identical to a center of the first arcuate surface and that has a radius larger than the radius of the first arcuate surface. The second arcuate surface includes two projections projecting toward the first arcuate surface. The magnet is inserted between the two projections and makes contact with the two projections.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: September 14, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuchika Tsuchida, Toshimitsu Iida
  • Patent number: 11114908
    Abstract: Disclosed are a rotor for an electric motor, an electric motor, and a compressor. The rotor includes: a rotor core (1), provided with a shaft hole (11) and four magnet grooves (12); and four permanent magnets (2), disposed in corresponding magnet grooves, each permanent magnet including a first surface (21) and a second surface (22). When viewed from a projection surface, the first surface has an arc segment (211), and the second surface has a plurality of straight segments connected in sequence. A thickness H of each permanent magnet on a corresponding magnetic pole centerline, a length L of the second surface projected on the projection surface, and a radius R of the rotor core satisfying the following relationships: 0.24?H/R?0.26 and 1.07?L/R?1.11.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: September 7, 2021
    Assignees: ANHUI MEIZHI COMPRESSOR CO., LTD., MIDEA GROUP CO., LTD.
    Inventor: Ben Xu
  • Patent number: 11108312
    Abstract: Each of a plurality of permanent-magnet pairs is configured with a pair of permanent magnets that are arranged in a v-shaped manner in such a way that the distance between the portions of the permanent magnets, facing each other at the outer side in the radial direction of the rotor core, is smaller than the distance between the portions thereof, facing each other at the inner side in the radial direction of the rotor core; a magnetic-field pole is formed of part, of the rotor core, that is situated between the adjacent permanent-magnet pairs.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: August 31, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takizawa, Yu Hirotani
  • Patent number: 11063485
    Abstract: An interior permanent magnet motor assembly including a stator and a rotor is provided. The stator includes electromagnetic windings. The rotor is disposed concentrically with the stator about a rotor axis and the rotor has a plurality of rotor segments. The plurality of rotor segments may include a first rotor segment and a second rotor segment. The first rotor segment may have first pockets being arranged to receive at least a first magnet of a first magnet set according to a first rotor topology. The second rotor segment may be axially stacked relative to the first rotor segment about the rotor axis. The second rotor segment may be arranged to receive at least a second magnet of a second magnet set according to a second rotor topology having a configuration that is different than the first rotor topology.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: July 13, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Subhra Paul, Mohammed R. Islam
  • Patent number: 11038388
    Abstract: A rotor of a rotary electric machine includes a rotor core of an approximately annular shape which has plural sets of plural magnet insertion holes arranged radially, the plural sets being arranged in a circumferential direction with a predetermined gap, and plural permanent magnets which are inserted into the magnet insertion holes, respectively. Each permanent magnet has a circular arc shape in a radial section, and a curved surface thereof is convex toward a rotation shaft of the rotor. Plural permanent magnets which are respectively inserted into the radially arranged plural magnet insertion holes in each set includes a first permanent magnet which is positioned on an outer circumferential surface side and a second permanent magnet which is positioned on a rotation shaft side and has a radial thickness equal to or larger than a radial thickness of the first permanent magnet.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: June 15, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shingo Soma, Yoshihisa Kubota
  • Patent number: 11038409
    Abstract: A rotor of a synchronous motor includes a rotor core that includes magnet insertion holes and a plurality of slits formed on an outer peripheral side of the magnet insertion holes, and permanent magnets embedded in the magnet insertion holes. Magnetic-path forming slits are formed at intervals in a direction along a side of the permanent magnet. Magnetic paths are formed between the magnetic-path forming slits and at portions on the outside of the magnetic-path forming slits on the outermost side. An adjusting slit is formed between a predetermined magnetic-path forming slit and the permanent magnet such that a difference between quantities of magnetic flux passing through the magnetic paths adjacent to each other for widths in a direction intersecting an orientation of a magnetic pole of the permanent magnet is small.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: June 15, 2021
    Assignee: OKUMA CORPORATION
    Inventors: Tatsuya Shizu, Takanori Yokochi
  • Patent number: 11025113
    Abstract: A hybrid rotor assembly is provided. The assembly utilizes two different types of magnets within the lamination cavities of the lamination stack: sintered permanent magnets and bonded magnets.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: June 1, 2021
    Assignee: Atieva, Inc.
    Inventor: Emad Dlala
  • Patent number: 11011964
    Abstract: A cage induction motor includes a rotor core that is rotatable about a central axis, and a shaft to which the rotor core is fixed. The rotor core includes an annular yoke and a plurality of spokes. The yoke supports at least one conductor. The plurality of spokes are arranged apart from one another in a circumferential direction of the yoke, are provided between the yoke and the shaft, and support the yoke.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: May 18, 2021
    Assignees: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Kenji Sato, Takafumi Fukushima, Daisuke Misu, Makoto Matsushita, Toshio Hasebe
  • Patent number: 10910893
    Abstract: A rotor for a synchronous reluctance machine having an even number 2 p of poles circumferentially spaced at an angle ?, with ?=2 ?/2 p, the rotor comprising a substantially cylindrical laminate stack having a plurality of magnetically conductive laminations. One or more of the magnetically conductive laminations includes non-magnetic flux barriers which are spaced from each other in the radial direction, one or more of the non-magnetic flux barriers having a first and second bridge transversally positioned in correspondence of their lateral ends and defining a first and a second air-gap with the outer rim of the magnetically conductive lamination, and further including a third and a fourth bridge transversally positioned and respectively defining together with the first and second bridge a first and a second internal space which are filled with an electrically conductive and non-magnetically conductive material.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: February 2, 2021
    Assignee: ABB Schweiz AG
    Inventors: Jere Kolehmainen, Tero Kansakangas, Pietro Savio Termini
  • Patent number: 10910987
    Abstract: To provide a motor control method ensuring that dragging loss at the time of high rotation can be reduced. A motor control method, wherein a composite permanent magnet has a core part and a shell part, the Curie temperature of one of the core part and the shell part is Tc1 K, and the Curie temperature of another is Tc2 K, and wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at Ts K that is (Tc1?100) K or higher and lower than Tc2 K and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature Ts K or Tc1 K, whichever is lower.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: February 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Masao Yano, Masaaki Ito, Tetsuya Shoji, Hidefumi Kishimoto, Akira Kato
  • Patent number: 10903702
    Abstract: A motor having an improved assembly structure of a rotor core and a magnet is provided. The motor comprising a stator and a rotor that rotates with respect to the stator. The rotor comprises a rotor core that is disposed rotatably with respect to a rotary shaft and has a plurality of magnet coupling apertures disposed apart from each other at a particular interval in a circumferential direction of the rotary shaft. Additionally, a magnet is inserted into the magnet coupling aperture and a plate is coupled to opposite end portions of the rotor core. The plate includes a magnet support portion that is configured to support the magnet.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: January 26, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jungwoo Lee, WoongChan Chae
  • Patent number: 10862356
    Abstract: A rotor for a reluctance machine includes conductor layers and insulation layers arranged in alternation in the axial direction. The conductor layers have magnetic-flux-conducting conductor regions and the insulation layers are electrically insulating. To improve weight and efficiency of a reluctance machine, the rotor is produced at least partially by additive manufacturing.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: December 8, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Roland Bittner, Markus Hösle
  • Patent number: 10862355
    Abstract: An armature includes a multi-phase armature coil and an armature core. The armature core includes a back yoke, a plurality of large-width teeth and a plurality of small-width teeth having a smaller circumferential width than the large-width teeth. The large-width teeth each radially protrude from the back yoke and are spaced from one another in a circumferential direction of the armature core. The large-width teeth have the armature coil concentratedly wound thereon. The small-width teeth each radially protrude from the back yoke and are spaced from one another in the circumferential direction of the armature core. The small-width teeth are arranged alternately with the large-width teeth in the circumferential direction of the armature core. Moreover, 1?W1/W2?2, where W1 is a radial width of the back yoke and W2 is the circumferential width of the small-width teeth.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: December 8, 2020
    Assignee: DENSO CORPORATION
    Inventor: Shin Kusase
  • Patent number: 10854397
    Abstract: An electric machine, to a motor vehicle with such an electric machine, and to a method for operating such an electric machine. The electric machine includes at least one sliding contact which is formed by a slip ring connected to a rotor and by at least one brush and via which an operating current flows during an operation of the electric machine. A control unit is configured to control the operation of the electric machine. The control unit is configured to verify a predetermined operating criterion of the electric machine and, if said operating criterion is met, to inject a cleaning current according to a predetermined scheme, which then flows independently of the operating current via the sliding contact and cleans said sliding contact in order to maintain or improve a current transfer capability of the sliding contact.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: December 1, 2020
    Assignee: AUDI AG
    Inventor: Roman Strasser
  • Patent number: 10848037
    Abstract: A permanent magnet rotor (1) with a magnetically conductive magnetic core (2), which has a plurality of magnet retainers (3, 4) for radially arranged and essentially tangentially magnetized permanent magnet parts (9), and a method for the production thereof. With a common permanent magnet rotor, the object of the present invention is to ensure a simple installation for a low number of components to be installed, very good magnetizability, high strength of the mechanical connection of the permanent magnet parts in the magnet retainers, and a compact size.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: November 24, 2020
    Assignee: BÜHLER MOTOR GMBH
    Inventors: Mladen Zec, Armin Suttner-Reimann, Heinz Günther
  • Patent number: 10840762
    Abstract: A brushless motor includes a stator including teeth each including a constricted portion on which a coil is to be wound, and a tip end portion including a confronting surface that faces a rotor and having a width greater than that of the constricted portion. A spacer includes closure members disposed between adjacent ones of the tip end portions, and fitted to the teeth so that the confronting surfaces of the teeth are exposed toward the rotor.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: November 17, 2020
    Assignee: YAMAHA MOTOR ELECTRONICS CO., LTD.
    Inventors: Toshihiko Nagata, Yasufumi Takagi, Tomonari Shiraishi
  • Patent number: 10840754
    Abstract: A permanent magnet machine includes a rotor including a rotor hub and a plurality of permanent magnets embedded in the rotor in a circumferential pattern. The rotor includes a respective bridge between each circumferentially adjacent pair of the permanent magnets. Each bridge is of a different material than that of the rotor hub, and the rotor hub and bridges are integral with one another.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: November 17, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Dhaval Patel, Andreas C. Koenig
  • Patent number: 10840753
    Abstract: A permanent magnet module for an electrical machine extending along an axial direction is provided. The permanent magnet module comprises a permanent magnet assembly comprising at least one permanent magnet and a base supporting at least part of the permanent magnet assembly and extending from a bottom adapted to be positioned on a rotor of an electrical machine to a top along a radial direction. The permanent magnet assembly further comprises a first inclined permanent magnet portion and a second inclined permanent magnet portion arranged outwardly inclined along the radial direction and a tangential permanent magnet portion arranged substantially perpendicular to the radial direction.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 17, 2020
    Assignee: GE Renewable Technologies Wind B.V.
    Inventors: César Muñiz Casais, Julio César Urresty, Adrian Bueno De Santiago
  • Patent number: 10784729
    Abstract: A rotor has reduced weight. A hammer drill includes a motor including a stator and a rotor rotatable relative to the stator. The rotor includes a rotor core having a first space, and a permanent magnet fixed on the rotor core.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 22, 2020
    Assignee: MAKITA CORPORATION
    Inventor: Junya Inuzuka
  • Patent number: 10778055
    Abstract: In an electric motor, a first magnet and a second magnet are accommodated in magnet accommodating apertures of a rotor core. On outer circumferential core portions that exist on a radially outer side of the magnet accommodating apertures, two slits as a pair of first slits, and two slits that are respectively adjacent to each of the first slits are disposed circumferentially outside the pair of first slits as a pair of second slits. The outer circumferential core portions include: a first magnetic portion that exists between the pair of first slits; and a pair of second magnetic portions that respectively exist between the first slits and the second slits. An inter-magnet space portion that exists between the first magnet and the second magnet is positioned within a range of the first magnetic portion in the circumferential direction of the rotor.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: September 15, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiko Baba, Masahiro Nigo, Kazuchika Tsuchida, Atsushi Ishikawa
  • Patent number: 10770960
    Abstract: A permanent magnet motor, comprising a stator (1) and a rotor (4); the rotor comprises a rotor iron core (5) and permanent magnets (7a, 7b); in the radial direction of the rotor, each magnetic pole of the rotor iron core is provided with multiple layers of arc-shaped permanent magnet grooves (6a, 6b); a q-axis magnetic flux path is formed between two neighboring magnetic poles; the permanent magnets are disposed in the permanent magnet grooves; two neighboring magnetic poles of the rotor are respectively a first magnetic pole and a second magnetic pole having opposite polarities; an outer endpoint of a permanent magnet in the first magnetic pole is a first outer endpoint, said outer endpoint is farther from the q-axis; an outer endpoint of the permanent magnet in the second magnetic pole is a second outer endpoint, said outer endpoint is farther from the q-axis; an included angle A of the first outer endpoint and the second outer endpoint with respect to the center of the rotor is less than an electrical angl
    Type: Grant
    Filed: June 25, 2016
    Date of Patent: September 8, 2020
    Assignee: Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
    Inventor: Yong Xiao
  • Patent number: 10756585
    Abstract: An electrical machine, in particular a synchronous reluctance motor, having a rotor having a number of similar permanent magnets, each of which is disposed in each case in an associated pocket of the rotor. Permanent magnets adjacent in a tangential direction can be installed only in one position in the respective pocket, in which the magnetization directions is rotated by 180° with respect to a radial straight line associated with the respective permanent magnet. A rotor of an electrical machine is also provided.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 25, 2020
    Assignee: Baumueller Nuernberg GmbH
    Inventors: Jiri Kurfuerst, Jiri Skoda, Tomás Jindra, Jan Rezek, Ladislav Knebl
  • Patent number: 10739046
    Abstract: A compressor is configured such that an axis center of a rotating shaft for transmitting rotation of a rotor to a compressing unit for compressing a refrigerant is offset from a rotor center of the rotor, and, when the rotor is divided into, with respect to the rotor center, a first portion located on a side in a direction from the axis center to the rotor center and a second portion located on a side in a direction from the rotor center to the axis center, a magnetic force of the first portion is stronger than a magnetic force of the second portion. This configuration allows the rotor to generate non-uniform magnetic attractive forces during the rotation of the rotor and thereby can suppress vibration generated due to rotation of an eccentric portion of the compressing unit and reduce noise.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: August 11, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuchika Tsuchida
  • Patent number: 10742080
    Abstract: A rotor mechanism includes a plurality of rotor bars and a rotor core. The rotor bars are disposed along the edge of the rotor core. The rotor core has a plurality of magnetic flux-barrier units and at least one flux channel. Each magnetic flux-barrier unit extends from one of the rotor bars to another rotor bar. The flux channel passes through the flux-barrier units and surrounds an axis of the rotor core, wherein each magnetic flux-barrier unit is a magnetic flux barrier, and the area between the adjacent magnetic flux-barrier units and the flux channel are pathways for magnetic flux.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 11, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ming-Mao Hsu, Wen-Yang Peng, Kuo-Lin Chiu, Chau-Shin Jang
  • Patent number: 10727709
    Abstract: Provided are a rotor of a rotary electrical machine, a rotary electrical machine, and a vehicle, which enable mitigation of stress concentration generated in a magnet insertion hole of a rotor core and high-speed rotation. A rotor 250 of a rotary electrical machine includes: a rotor core 252 including a plurality of magnet insertion holes 253 for each magnetic pole; and permanent magnets 254 inserted into the magnet insertion holes, in which a bridge portion 260, which mechanically connects a rotor core portion 256 on the outer circumferential side of the magnet insertion holes 253 and a rotor core portion 263 on the inner circumferential side of the magnet insertion holes 253, is provided between the adjacent magnet insertion holes, and the bridge portion 260 has two inflection points 266a and 266b on the outer circumferential side of the bridge portion 260.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: July 28, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuji Kano, Hiroshi Hamano, Takayuki Koizumi, Yasuyuki Saito, Yousuke Umesaki, Seigo Misaki