Embedded In A Core Patents (Class 310/156.53)
  • Patent number: 11996740
    Abstract: A rotor includes a rotor core and a permanent magnet. The rotor core includes an outside slit provided between a permanent magnet insertion hole and an outer peripheral surface of the rotor core, and inside slits provided between a magnetic pole center part and the outside slit. A minimum distance from a first inside slit to the outer peripheral surface of the rotor core is longer than a minimum distance from any other inside slit except the first inside slit to the outer peripheral surface of the rotor core.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: May 28, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takanori Watanabe, Koji Yabe
  • Patent number: 11990796
    Abstract: The present invention provides a rotor, a motor using the rotor and an electronic device capable of effectively utilizing magnetic flux generated from a magnet. The rotor includes a rotor core including an annular portion and a plurality of magnetic pole pieces radially extending from the annular portion via a pair of joint portions, a plurality of first magnets disposed between the neighboring magnetic pole pieces in a circumferential direction, and a plurality of second magnets disposed between the pair of joint portions, in which each of the first magnets contacts side surfaces of two neighboring magnetic pole pieces in the circumferential direction and each of the second magnets contacts inner surfaces of the magnetic pole pieces in a radial direction.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: May 21, 2024
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Takuji Yamada, Naoto Toyomura
  • Patent number: 11973374
    Abstract: A brushless direct-current motor is provided includes an inner stator and an outer rotor. The rotor includes a rotor core disposed around the stator, an inner annular member mounted on a rotor shaft, and a plurality of radial blades extending angularly from the rotor core to the inner annular member forming a fan. A first end cap is provided including a radial back plate proximate the fan and a center opening in the radial back plate through which the rotor shaft extends. A second end cap is provided including a main body disposed adjacent the stator opposite the fan. The radial back plate of the first end cap includes at least one sloped surface forming at least one air gap such that the airflow generated by the fan is centrifugally guided within the first end cap by the sloped surface and caused to exit through the air gap.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: April 30, 2024
    Assignee: Black & Decker Inc.
    Inventors: John B. Fogle, Dustin Jeffries, Michael R. Marjomaa, Kevin L. Pulley, Vincent W. Zou, Jarrett A. Dunston, David J. Smith, Rene Thieme, Tim Heimrich, Tobias Heep, Daniel Bernhart, Dieter Schmidtfrerick
  • Patent number: 11967863
    Abstract: Provided is a rotating electric machine. This rotating electric machine includes a stator and a rotor, and the rotor includes: a rotor core having formed therein a magnet insertion hole group; and a permanent magnet group. In the rotor core, a first magnetic slit and a second magnetic slit are formed. In the second magnetic slit, a first magnet magnetic flux guide path connecting a first q-axis magnetic path and a second q-axis magnetic path is arranged. When an angle between a straight line passing through a first intersecting point and a radial center point and a straight line passing through a second intersecting point and the radial center point is set as ?1, the number of pole pairs is set as P, a natural number is set as m1, and n1 is set as a natural number smaller than m1, the following expression: ?1=2?×n1÷{P×(2m1?1)} [rad] is satisfied.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: April 23, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi Mitsuda, Yoshihiro Miyama, Moriyuki Hazeyama, Masaya Inoue, Masashi Nakamura
  • Patent number: 11954416
    Abstract: A computer program causes a computer to execute processing of simulating behavior of an electromagnetic component including a coil at each of a plurality of time points based on an analytic model of the electromagnetic component. The processing comprises creating a look-up table storing a flux linkage of the coil, an inductance of the coil and a current in the coil that are obtained by a magnetic field analysis based on the analytic model in association with one another, and simulating behavior of the electromagnetic component by referring to the look-up table using currents in the coil calculated at a previous simulation step and at a step before the previous simulation step.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: April 9, 2024
    Assignee: JSOL Corporation
    Inventors: Takashi Yamada, Koji Tani
  • Patent number: 11949292
    Abstract: A rotor including a magnet and a rotor core. The magnet includes a pair of shoulders and a housing hole configured to house the magnet such that the pair of shoulders are arranged in a circumferential direction. The rotor core includes an inner core, a pair of supporters, and a covering portion. The inner core is located radially inward of the housing hole. The pair of supporters is located radially outward of the inner core and arranged in the circumferential direction through the housing hole. The covering portion connects between the pair of supporters. The supporters are configured to support the magnet by holding the pair of shoulders. The covering portion is configured to cover the magnet from radially outside of the magnet and has a thin portion connected to at least the pair of supporters.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: April 2, 2024
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 11936243
    Abstract: A three-phase winding is energized so that a phase difference ?e1 between each set is 30±60×n [deg] in an electrical angle. A tip portion of the teeth has a skew structure having a plurality of skew forming parts divided in an axial direction so as to be displaced by a predetermined angle ?e2 in a circumferential direction in the electrical angle. A relational expression ?e1>?e2 is satisfied. When a radial distance between the teeth and a circumscribed circle of a rotor core is set to a, and a radial distance between an outermost part of a permanent magnet located on the outermost side in a radial direction in a permanent magnet and the circumscribed circle is set to b, a relational expression a/b<1 is satisfied.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: March 19, 2024
    Assignee: DENSO CORPORATION
    Inventor: Katsuya Fujisaki
  • Patent number: 11901771
    Abstract: A rotating electric machine includes a stator and a rotor. The rotor includes a rotor core, an axial end part, and a rotor magnet inserted into an insertion hole formed so as to pass through the rotor core. The axial end part has a recessed portion. The rotor magnet includes a first side surface and a second side surface. The first side surface is fixed to a first inner wall surface of the insertion hole. In a cross section perpendicular to the axial direction, a width of the first inner wall surface is larger than a width of the first side surface. The second side surface is fixed to a second inner wall surface of the recessed portion. In the cross section perpendicular to the axial direction, a width of the second inner wall surface is larger than a width of the second side surface.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: February 13, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuki Hidaka, Hideaki Arita, Taiga Komatsu, Shohei Fujikura
  • Patent number: 11881749
    Abstract: The synchronous reluctance motor includes: an annular stator core having slots; and a cylindrical rotor core-having, for each magnetic pole, slits formed by arc-shaped openings which are convex toward a cylinder center and whose apexes are positioned on a q axis. The nth arc that is an inner edge of the opening close to the cylinder center has an arc center point on the q axis at a distance D(n) from-the rotor core. Where the radius of the nth arc with respect to the arc center point is denoted by R(n) and a ratio k(n) is defined as D(n)/R(n), the values of the ratios k(1) to k(n) are determined such that 0.20?k(nmax)?0.37 and k(nmax)< . . . <k(n)< . . . <k(1)<1 are satisfied and a slope a is in a range of (?0.92/nmax)?a?(?0.71/nmax).
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: January 23, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Moriyuki Hazeyama, Shinsuke Kayano
  • Patent number: 11876410
    Abstract: A rotor for a motor includes: a rotor core including accommodation holes penetrating the rotor core in an axial direction; permanent magnets respectively accommodated in the accommodation holes; an endplate configured to cover an end of the rotor core; and a soft magnetic core disposed on the endplate.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: January 16, 2024
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Hae Jun Yang
  • Patent number: 11863020
    Abstract: A rotor core has a magnet insertion hole, an opening formed adjacent to the magnet insertion hole in the circumferential direction, and a thin wall portion formed between the opening and an outer circumference of the rotor core. A stator core has a length in the axial direction shorter than that of the rotor core. The rotor core has a facing region where the rotor core faces the stator core in the radial direction and an overhang region where the rotor core protrudes from the stator core in the axial direction. A distance from the center axis to a portion of the outer circumference located on a radially outer side of the magnet insertion hole is longer in at least part of the overhang region than in the facing region. The minimum width of the thin wall portion in the radial direction is the same in both regions.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: January 2, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Yuji Hirosawa, Emi Tsukamoto
  • Patent number: 11855491
    Abstract: The present invention may provide a motor including a rotor and a stator disposed to correspond to the rotor, wherein the rotor includes a rotor core and a magnet disposed on the rotor core, a tooth of the stator includes a first surface facing the magnet, the magnet includes a second surface in contact with the rotor core and a third surface which is spaced apart from the second surface and faces the first surface, the third surface includes a flat surface, and a first length which is a shortest distance of the flat surface is in the range of 46% to 50% of a second length of a shortest distance of the first surface.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: December 26, 2023
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Jin Su Pyeon, Tae Ho Kim
  • Patent number: 11837919
    Abstract: According to one embodiment, a rotor core satisfies a relationship: W2/W1?(A1+A2)/A1. Where, A1 represents an area of a region defined by a polar central axis, an outer circumferential surface of the rotor core and a first imaginary linear line extending on an outer circumferential-side long edge of an embedding hole, A2 represents an area of a region defined by the polar central axis, a q-axis, the outer circumferential surface of the rotor core, a second imaginary linear line extending on an inner circumferential-side long edge of the embedding hole, a third imaginary linear line extending on a first edge of the cavity hole, W1 represents a half-width of a first bridge portion, and W2 represents a half-width of the second bridge portion.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: December 5, 2023
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Yusuke Matsuoka, Masakatsu Matsubara, Kazuo Aoki
  • Patent number: 11811271
    Abstract: A compressor includes a rotor, a stator configured to rotate the rotor, a compressor unit configured to compress a refrigerant with rotation of the rotor, and a housing in which an internal space for housing the rotor, the stator, and the compressor unit is formed, wherein the rotor includes a rotor core that has an upper surface and a lower surface, an edge plate that covers the upper surface or the lower surface, and a fixing member that fixes the edge plate to the rotor core, a plurality of refrigerant holes through which the refrigerant passes are formed in the rotor core, an opening that allows the plurality of refrigerant holes to communicate with the internal space and a fixing member opening through which the fixing member penetrates are formed in the edge plate, and a thickness portion is formed between the opening and the fixing member opening.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 7, 2023
    Assignee: FUJITSU GENERAL LIMITED
    Inventors: Tomooki Hasegawa, Takashi Suzuki
  • Patent number: 11799334
    Abstract: A power tool including a housing and a motor assembly positioned within the housing. The motor assembly includes a stator with winding slots that receive stator windings and a rotor. The rotor includes a rotor body with a first slot positioned a first distance from a center of the rotor body, a second slot positioned a second distance from the center of the rotor body, and a third slot positioned a third distance from the center of the rotor body. The first slot, the second slot, and the third slot are curved about a common center. The rotor further includes a first magnet positioned within the first slot, a second magnet positioned within the second slot, and a third magnet positioned within the third slot.
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: October 24, 2023
    Assignee: Milwaukee Electric Tool Corporation
    Inventor: Keith Boulanger
  • Patent number: 11799337
    Abstract: A rotating electric machine including a rotor including a rotor core arranged coaxially with a stator core via an air gap formed between the stator core and the rotor core, and a plurality of permanent magnet groups each forming one magnetic pole, A flux barrier is formed between one set of permanent magnets adjacent to each other in the circumferential direction in each permanent magnet group forming one magnetic pole. A pair of ribs is formed of regions of the rotor core between the flux barrier and the one set of permanent magnets. A first slit is formed in a region of the rotor core on the air gap side in a radial direction of the each permanent magnet group, and an end portion of the first slit on the flux barrier side is positioned between extension lines of the pair of ribs.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: October 24, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Junji Kitao, Kosho Yamane, Tomohira Takahashi, Yoshihiro Miyama
  • Patent number: 11784524
    Abstract: A rotor includes an axially extending in an axial direction, a rotor core including a central hole through which the shaft passes and accommodation holes radially outside the central hole, and magnets accommodated in the accommodation holes. The accommodation holes include a pair of accommodation holes extends in a direction away from each other in a circumferential direction from a radially inside toward a radially outside when viewed in the axial direction. The magnets include a pair of magnets accommodated in the pair of accommodation holes. The rotor core includes through-holes made at intervals in the circumferential direction, and is configured by laminating plates. The through-holes are located radially outside the central hole and radially inside the accommodation hole. The stacked plates are fixed to each other by a caulking portion in which a portion of the plate is caulked.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: October 10, 2023
    Assignee: Nidec Corporation
    Inventor: Kuniaki Tanaka
  • Patent number: 11777347
    Abstract: An electric motor and a compressor having an electric motor. The electric motor may include a stator, and a rotor provided with a rotational shaft, a rotor core coupled to the rotational shaft, and permanent magnets coupled to the rotor core. The rotor core may include a first core to which the permanent magnets may be coupled, and a second core made of a magnetic material and coupled to an end of the first core in an axial direction. The second core may have outer surfaces disposed inside of extension lines extending in the axial direction from inner surfaces of the permanent magnets.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: October 3, 2023
    Assignee: LG ELECTRONICS INC.
    Inventors: Chisung Park, Sangjoon Eum, Gyujong Jeong
  • Patent number: 11722022
    Abstract: A rotor for an electrical machine has at least one laminated core with a multiplicity of magnet pockets arranged in succession in an axial direction of the rotor. There are magnets fixed by a cured potting compound within the magnet pockets. The magnet pockets are fluidically connected to one another via at least one distributor system formed in the laminated core which has, at least one filling channel for each pocket fluidically connected to the respective pockets. The distributor system has at least one distributor channel common to and fluidically connected to the filling channels. The cured potting compound extends continuously through the distributor system from magnet pocket to magnet pocket.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: August 8, 2023
    Assignee: VITESCO TECHNOLOGIES GMBH
    Inventors: Holger Fröhlich, Christoph Heise
  • Patent number: 11705766
    Abstract: A permanent magnet motor comprises: a stator comprising teeth; and a rotor rotatable relative to the stator, the rotor having a plurality of poles, wherein each pole of the rotor comprises a pair of magnet retention slots, each magnet retention slot accommodating a magnet. Surfaces of the teeth of the stator facing the rotor are flat or have an arc shape. Each magnet retention slot may have a plurality of angled slot surfaces forming a first barrier around a corner of the magnet positioned closest to an outer surface of the rotor. At least three second barriers are positioned around a mid-axis extending along between the pair of the magnet retention slots. Each magnet retention slot comprises a slot surface slanted or curved relative to a second side surface of the magnet facing an inner surface of the rotor to form a third barrier around an end of the second side surface of the magnet.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: July 18, 2023
    Assignee: HL MANDO CORPORATION
    Inventors: Mazharul Chowdhury, Md Sariful Islam, Mohammad Islam, Abraham Tesfamicael
  • Patent number: 11682937
    Abstract: A rotor structure includes a rotor body and a plurality of magnets. The rotor body has a plurality of surrounding magnet-setting areas, and each magnet setting area has a first magnet slot and a second magnet slot symmetrically arranged to a centripetal axis. A first outer end of the first magnet slot and a second outer end of the second magnet slot are close to the centripetal axis and rotor's outer edge. A first outer end of the first magnet slot and a second outer end of the second magnet slot are distant to the centripetal axis and rotor's outer edge. The outer edge has a plurality of notches intersected by the corresponding centripetal axes. The magnets are respectively fixed to the first magnet slots and the second magnet slots of the magnet-setting areas.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: June 20, 2023
    Assignee: TECO ELECTRIC & MACHINERY CO., LTD.
    Inventors: Lian-Shin Hung, Ching-Chih Huang, Yu-De Li
  • Patent number: 11670975
    Abstract: The present invention provides a motor comprising: a rotating shaft; a rotor including a hole through which the rotating shaft is inserted; and a stator disposed outside the rotor, wherein the rotor comprises a rotor core surrounding the rotating shaft, and a plurality of magnets coupled to the rotor core, the magnets are disposed such that each two magnets, adjacent to each other in the axial direction of the rotating shaft, have a predetermined spacing therebetween, and the sum of the spacings is 0.04 to 0.07 times the axial length of the stator.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: June 6, 2023
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Seong Jin Lee, Bong Bae Kong
  • Patent number: 11670996
    Abstract: A rotor core is provided for a step-skewing motor that includes rotor core segments mutually staggered by a preset angle. Each of the rotor core segments includes magnet slots along a circumferential direction, with a magnet provided in the magnet slot. An outer circular surface of each of the rotor core segments is provided thereon with a number of auxiliary grooves extending across the segment in an axial direction, and positions and/or cross-sectional shapes of the auxiliary grooves on the rotor core segments are not completely same so as to suppress torque ripple and vibration noise when the motor rotates.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: June 6, 2023
    Assignee: Jing-Jin Electric Technologies Co., Ltd
    Inventors: Kaihe Zhang, Liangliang Zhang, Longyu Ju
  • Patent number: 11646620
    Abstract: A rotor core for an electric machine of an automobile includes a core stack including a plurality of lamination plates, each lamination plate including a plurality of apertures formed therein, the apertures of each of the lamination plates axially aligned to define a plurality of magnet slots extending axially through the core stack, a plurality of magnets stacked axially within each of the plurality of magnet slots along a length of the core stack, at least one of the plurality of magnet slots including a cavity extending axially along the length of the core stack, and a wedge inserted within the cavity adapted to apply a lateral force onto the plurality of magnets within the at least one magnet slot to secure the plurality of magnets within the at least one magnet slot.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: May 9, 2023
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Derek F. Lahr, Farzad Samie, Edward L. Kaiser
  • Patent number: 11634039
    Abstract: A system and method for integrated charging a vehicle includes a hybrid excitation machine, operable as a traction motor and including a rotor separated by an air gap from a stator with AC windings. An AC utility line power supply is connected to the AC windings providing an electrical current to the vehicle and inducing a magnetic flux across the air gap and in the rotor. A short circuit, an open circuit, or a DC voltage may be applied to a DC winding in the stator to reduce the magnetic flux into the rotor. A field coil in the rotor may be excited with a DC voltage using a secondary coil on the rotor in a traction mode. The secondary coil is excited by the stator windings using field-oriented control in a “self-excited machine” embodiment, and is directly excited by a separate primary coil in an “externally-excited machine” embodiment.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: April 25, 2023
    Assignee: MAGNA INTERNATIONAL INC.
    Inventors: K. Lakshmi Varaha Iyer, Gernot Steinmair, Jasmin Jijina Sinkular
  • Patent number: 11616409
    Abstract: An electric machine rotor includes a plurality of plates stacked along an axis of rotation. Each of the plates defines a plurality of cavities. Each cavity defines a pole arc angle, has at least one permanent magnet pocket, and has magnetic field guide chambers extending outward from the at least one permanent magnet pocket. Offset angles between the magnetic field guide chambers and the at least one permanent magnet pockets vary between at least two of the cavities of the plurality of cavities within each plate such that each plate defines at least two different pole arc angles. The plates are stacked such that the at least one permanent magnet pockets between adjacent plates are axially aligned and such that the magnetic field guide chambers between adjacent plates are axially offset.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: March 28, 2023
    Assignee: Ford Global Technologies, LLC
    Inventors: Chun Tang, Franco Leonardi, Michael W. Degner, Jacob Krizan
  • Patent number: 11588362
    Abstract: Provided is a rotor for application in a drive motor that includes multiple cores of the rotor that define a plurality of slots into each of which a permanent magnet is inserted, in which the cores of the rotor include a first core in which fixation jaws for holding in place one surface of the permanent magnet and the other surface opposite to the one surface in a direction of extension of the permanent magnet are disposed, and a second core in which fixation jaws for holding in place one surface of the one surface of the permanent magnet and the other surface opposite to the one surface in the direction of the extension of the permanent magnet are disposed.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: February 21, 2023
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Kyung Soo Park, Jung Woo Lee
  • Patent number: 11581767
    Abstract: A permanent magnet motor is provided, including: a stator and a rotor. The stator has a plurality of windings. The rotor has a plurality of magnet placement slots and a plurality of air gaps. The plurality of magnet placement slots include a plurality of circumferential magnet placement slots circumferentially arranged and a plurality of radial magnet placement slots radially extending. The circumferential magnet placement slots and the radial magnet placement slots are circumferentially alternately arranged. The plurality of air gaps are adjacent to part of the plurality of magnet placement slots and distributed to be on a d-axis flux path of the rotor.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: February 14, 2023
    Assignee: ADLEE POWERTRONIC CO., LTD.
    Inventor: Shou-Yu Chu
  • Patent number: 11569699
    Abstract: A rotor includes a rotor core, a first magnet, a second magnet, and a holder made of resin. Both a radially inner surface and a radially outer surface of the first magnet are covered with the rotor core. The second magnet includes a radially inner surface covered with the rotor core, and a radially outer surface exposed from the rotor core. The holder includes a first inner pressing portion and a second inner pressing portion. The first inner pressing portion presses the first magnet radially outward from a radially inner side of the first magnet. The second inner pressing portion presses the second magnet radially outward from a radially inner side of the second magnet. Accordingly, the first magnet and the second magnet are accurately positioned for the rotor core.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: January 31, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Yuya Saito, Hideo Fujiwara, Akira Ichien
  • Patent number: 11557950
    Abstract: A compressor includes: a stator core including a plurality of teeth around which an aluminum winding wire is wound in a concentrated manner; a rotor core disposed on an inner diameter side of the stator core and including a plurality of magnet insertion holes; and a plurality of ferrite magnets inserted in the magnet insertion holes, in which when a width of a winding wire portion formed in each of the teeth is represented as A, a length in an axis direction of the stator core is represented as L, and the number of slots is represented as S, the stator core has a shape that satisfies a relation of 0.3<S×A÷L<2.2.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: January 17, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuchika Tsuchida
  • Patent number: 11522400
    Abstract: The present invention relates to a fault-tolerant modular permanent magnet assisted synchronous reluctance motor (PMaSynRM) and provides a modular winding connection method. The modular winding connection is to change the positions of inlet and outlet coils based on the slot electrical potential star vectogram. Then, each module has a separate set of winding and the left and right relative distribution will be adopted on the winding connection. The invention has the advantages of modularization in structure, high independence between the modules, effectively avoiding overlapping of magnetic lines between the modules, and improving fault tolerance and reliability of the motor. The invention has the advantages of modularization in structure, high independence between the modules, magnetic decoupling between the modules, and improvement of fault tolerance and reliability of the motor.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: December 6, 2022
    Assignee: Jiangsu University
    Inventors: Guohai Liu, Meimei Xu, Wenxiang Zhao, Jinghua Ji, Qian Chen, Zhijian Ling
  • Patent number: 11489382
    Abstract: The invention relates to a rotor for a synchronous drive motor including a plurality of rotor poles, each rotor pole having at least two magnetic layers arranged radially one behind the other, and each magnetic layer comprising a series of magnetic elements, which are formed by injection molding or casting, and solidification of permanent magnetic material in rotor cavities. According to the invention, at least a portion of the magnetic elements each include projections protruding on both sides in their radially inner halves to introduce centrifugal forces of the magnetic elements into the rotor. This ensures an improved possibility of supporting the magnetic elements where sufficient rotor material is available. As a result, it is possible to prevent the radially outer ends of the magnetic elements from abutting the wall of the rotor as a result of centrifugal forces, which reduces the loads and deformations in the webs and bridges between the magnetic elements or to the outer edge of the rotor.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: November 1, 2022
    Assignee: BRUSA Elektronik AG
    Inventors: Raphael Teufel, Tian Zhou, Daniel Oeschger
  • Patent number: 11437876
    Abstract: The present invention provides a rotating electrical machine capable of fixing a permanent magnet at a defined position of a magnet insertion hole without providing a filling groove for injection of a filler in a rotor core and, of course, without lowering performance as the rotating electric machine. A rotating electrical machine of the present invention includes: a rotor; and a stator, the rotor including: a rotor core provided with a plurality of magnet insertion holes; a permanent magnet inserted into the magnet insertion hole; and a filler configured to fix the permanent magnet to the magnet insertion hole.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: September 6, 2022
    Assignees: HONDA MOTOR CO., LTD., HITACHI ASTEMO, LTD.
    Inventors: Takayuki Nitta, Yasuyuki Saito, Yuji Kobayashi, Manabu Yazaki, Keiichiro Kashiwabara, Atsushi Nishida
  • Patent number: 11427071
    Abstract: A motor includes a shaft extending along a center axis, and a first groove that is recessed in a radial direction and extends in an axial direction, on an outer side surface of the shaft. The motor includes a stator core into which the shaft is inserted, and a rotation restrictor that is inserted into at least a portion of the first groove and restricts the stator core and the shaft in a circumferential direction. A carrier vehicle is equipped with the motor further including a lead wire extending from the stator. The shaft includes a shaft portion and a flange portion that overhangs to a radially outer side from one side of the shaft portion in the axial direction. The flange portion includes an opening through which the lead wire passes. The opening includes a notch connected to an outer side surface of the flange portion. The opening of the motor is positioned above the center axis.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: August 30, 2022
    Assignee: NIDEC SERVO CORPORATION
    Inventors: Toshihiro Okabe, Mariko Tanaka, Satoshi Taguchi, Hironobu Yoshikawa
  • Patent number: 11411478
    Abstract: The high efficiency motor employing the principle of three phase induction motor and permanent magnet synchronous motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft, a rotor stack assembly, a rotor cover and end ring. The rotor stack assembly includes a stamping stack, a conductor bar and a magnet. The stamping stack has dedicated slots for the conductor bar and the magnet. The rotor cover is fitted on the rotor stack, wherein both axial ends of the rotor cover are closed by end rings.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 9, 2022
    Assignee: Shakti Pumps (I) Ltd.
    Inventors: Chinmay Jain, Bharat Singh Parihar, B. M. Sharma
  • Patent number: 11404925
    Abstract: A permanent magnet motor includes a stator, and a rotor having a rotor core disposed opposing an inner side of the stator across an air gap, a permanent magnet disposed in a circumferential direction of the rotor core, and a field pole of the rotor core in which the permanent magnet is disposed, wherein the field pole has a radius smaller than an arc centered on a shaft attached to an inner side of the rotor, a multiple of a slit whose longitudinal axial direction is a radial direction of the rotor core are formed in the field pole, and an interval between a first central line positioned between a multiple of the slit and a second central line positioned between a neighboring multiple of the slit is enlarged as the first central line and the second central line head toward an outer peripheral side of the rotor core.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 2, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takizawa, Satoru Akutsu, Masafumi Okazaki, Natsumi Sugi
  • Patent number: 11404924
    Abstract: There is provided a rotor that is capable of improving torque and rotational speed while securing mechanical strength. The rotor is equipped with a plurality of outer radial-side magnet slots 12, 13, a plurality of inner radial-side magnet slots 14, 15, a plurality of outer radial-side magnets 21, 22 that are respectively fit into the outer radial-side magnet slots 12, 13, and a plurality of inner radial-side magnets 23, 24 that are respectively fit into the inner radial-side magnet slots 14, 15. Lb2>Lb1 is satisfied, when one 12c, 13c of the recesses 12a-12d, 13a-13d of the outer radial-side magnet slot 12, 13 that is closest to the d-axis has a radial length of Lb1, and when one 14d, 15d of the recesses of the inner radial-side magnet slot 14, 15 that is closest to the d-axis has a radial length of Lb2.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: August 2, 2022
    Assignee: MEIDENSHA CORPORATION
    Inventor: Shun Ueno
  • Patent number: 11398756
    Abstract: An embedded magnet type rotor has a laminated core which is formed by laminating a plurality of steel plates, and a magnet provided in a magnet insertion hole of the laminated core, and an end plate provided at an end portion of the laminated core so as to close the magnet insertion hole. The pair of adjacent steel plates are fixed by pressing a steel plate fixing protrusion of one first steel plate into a steel plate fixing hole of the other first steel plate. The end plate and the laminated core are fixed by pressing a plate fixing protrusion of the end plate into a plate fixing hole of the laminated core. The steel plate fixing hole and the plate fixing hole are alternately arranged in a circumferential direction.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: July 26, 2022
    Assignee: DENSO CORPORATION
    Inventor: Yuuki Fujii
  • Patent number: 11394257
    Abstract: A cogging torque in a rotary electric machine is sufficiently reduced. The rotor core includes a magnetic pole having the base formed on the outer peripheral side of the storage space. A plurality of magnetic poles are provided in the circumferential direction, and include the first protrusion protruding from the base in one circumferential direction along the outer periphery of the rotor core, and the second protrusion which is provided on the opposite side to with the base interposed and protrudes from the base along the outer periphery of the rotor core in the other circumferential direction. At least one of the first protrusion and the second protrusion is located on the outer peripheral side from the first line segment which is a virtual line connecting the end of the first protrusion and the end of the second protrusion, and is provided such that the space is provided with respect to the first line segment.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: July 19, 2022
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Kazutami Tago, Hiroshi Kanazawa, Kenji Nakayama, Yuji Tsuji, Takayuki Chikaoka
  • Patent number: 11394255
    Abstract: A device includes a first rotor segment and a second rotor segment, wherein the first rotor segment and the second rotor segment are configured to be directly coupled together about a shaft to form at least a portion of a unitary rotor. The device also includes a first stator segment and a second stator segment, wherein the first stator segment and the second stator segment are configured to be directly coupled together to form at least a portion of a unitary stator.
    Type: Grant
    Filed: November 12, 2021
    Date of Patent: July 19, 2022
    Assignee: Duxion Motors, Inc.
    Inventors: Rick Ralph Pilgrim, Sheikh Fazle Rabbi, Jason Aspin, Dipesh Maharjan, Richard Robert Roper
  • Patent number: 11381125
    Abstract: A rotor for an electric machine is provided. Permanent magnets are disposed on the rotor such that the permanent magnets cannot carry out any tangential movement. The rotor may have four shoulders that extend away from a shell surface of the rotor in a radial direction. Primary permanent magnets that are disposed so as to be mutually contiguous and contiguous to the respective shoulders and accordingly cannot be displaced are in each case located between the shoulders. Secondary permanent magnets are disposed on the shoulders such that an annulus of magnets that is free of gaps and voids and is not movable in the tangential direction is formed.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: July 5, 2022
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventor: Robert Goraj
  • Patent number: 11374449
    Abstract: A permanent-magnet spindle motor includes a rotor in which a plurality of magnet units have a specific spatial configuration that results in a concentrated magnetic flux and consequently a high rotation speed. Each magnet unit has two first magnets and two magnetic barrier spaces, wherein the first magnets are provided in the tubular rotating shaft of the rotor mirror-symmetrically with respect to an axis of mirror symmetry defined by a diameter of the rotating shaft, and wherein each of the magnetic barrier spaces is formed as a hole, penetrates the rotating shaft along the axial direction thereof, is open at the two axial ends of the rotating shaft, is located between the outer periphery of the rotating shaft and one of the first magnets, and is adjacent to the distal end (with respect to the axis of mirror symmetry) of the one of the first magnets.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: June 28, 2022
    Assignee: HIWIN MIKROSYSTEM CORP.
    Inventors: Zhe-Wei Zhang, Ruei-Bin Hsiao
  • 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: 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: 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: 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