Patents Examined by Thomas Truong
  • Stator element, stator assembly, motor, and electromechanical device
    Patent number: 11296562
    Abstract: Embodiments of this application provide a stator element, a stator assembly, a motor, and an electromechanical device, the stator element including at least two stacked stator housing sheets, each of the stator housing sheets being a frame enclosed by a sheet periphery, at least two protrusions being disposed around the periphery of each of the stator housing sheets, the protrusion being directed from an inside of the stator housing sheet to an outside of the stator housing sheet, a groove being formed between adjacent protrusions, and protrusions of the adjacent stator housing sheets being alternately arranged in a direction in which the at least two stator housing sheets are stacked. Therefore, heat of a stator disposed inside the stator element can be dissipated with a strong heat dissipation capability at relatively low costs.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: April 5, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Keng-Chang Wu, Guo-Jhih Yan
  • Rotor of an electric machine
    Patent number: 11296564
    Abstract: A rotor of an electric machine, in particular an electric motor, having a rotor body, which circumferentially surrounds a shaft and includes a first sub-body and a second sub-body. The first sub-body and the second sub-body are joined together in the axial direction by means of an axle which extends in the axial direction and is offset radially to the outside with respect to the shaft. The first sub-body includes an eyelet, within which a socket receiving the axle is arranged, and the second sub-body includes a lug, which receives the axle. An electric machine, in particular an electric motor, is also provided.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: April 5, 2022
    Assignee: Baumueller Nuernberg GmbH
    Inventors: Frank Gutjahr, Paul Eisfeld
  • Rotor and rotary electric machine
    Patent number: 11289959
    Abstract: According to one embodiment, a rotor includes a rotor core including magnetic poles arranged in a circumferential direction, a cavity formed on an axis q and extending toward a central axis, and a flux barrier band formed in the magnetic pole between a pair of the cavities to cross an axis d and including a first bridge part facing one cavity, a second bridge part facing the other cavity, and a magnet embedding hole formed between the first and the second bridge parts, a first permanent magnet formed of a fixed magnetic force magnet and disposed in the magnet embedding hole to be adjacent to the first bridge part, and a second permanent magnet formed of a variable magnetic force magnet and disposed in the magnet embedding hole to be adjacent to the second bridge part.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: March 29, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Masaru Kano, Hideki Hisada, Masakatsu Matsubara, Yusuke Matsuoka
  • Rotor, motor, and electric power steering device
    Patent number: 11289963
    Abstract: A rotor includes a shaft, a rotor core, at least one magnet, and at least one fixing portion. The shaft extends in an axial direction. The rotor core includes laminations, and at least one caulking portion. The laminations are stacked in the axial direction. The at least one caulking portion is located at a radial-directional inner side of the at least one magnet to caulk the laminations to each other. The at least one magnet is embedded in the rotor core. The at least one fixing portion fixes at least portions of outer peripheral edges of the laminations to each other.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: March 29, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Shuji Iwasaki, Takahiro Uetani, Masaaki Ogawa
  • Motor and brushless wiper motor
    Patent number: 11289960
    Abstract: A motor and a brushless wiper motor are provided. The motor (2) includes: a stator (8); coils (24); a shaft (31); a rotor core (32); magnets (33) which are disposed on an outer peripheral surface (32b) of the rotor core (32) and a radial thickness of which at end portions (33s) on both sides in the circumferential direction around the rotation axis is smaller than a radial thickness in a circumferential intermediate portion; and salient poles (35) that are formed between magnets (33) adjacent in the circumferential direction of the outer peripheral surface (32b) of the rotor core (32) and protrude radially outward from the end portions (33s) of the magnets (33) in the circumferential direction. The width dimensions of the salient poles (35) in the radial direction being set to 40° or less in a form of an electrical angle.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: March 29, 2022
    Assignee: MITSUBA Corporation
    Inventors: Ryo Ohori, Naoki Shioda, Gensaku Yamakami
  • Rotor and rotating electrical machine
    Patent number: 11283316
    Abstract: A rotor includes a rotor core, a shaft rotated integrally with the rotor core and having an axial center cooling path through which a coolant is able to flow, a plate member having a first flow path which flows the coolant flowing through the axial center cooling path to an outer circumferential section of the rotor core, a permanent magnet disposed on the outer circumferential section of the rotor core, a filament winding layer wound on an outer circumferential section of the permanent magnet, and a cylindrical body disposed on an outer circumferential section of the filament winding layer.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: March 22, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Shuhei Tanaka
  • Motor rotor assembly structure
    Patent number: 11271444
    Abstract: The motor rotor assembly structure includes a rotating shaft, a plurality of rotor cores formed by a plurality of rotor punches neatly laminated, and rotor pressure plates installed at front and rear ends of the rotor core. The rotor core is provided with a shaft hole for mounting the rotating shaft in the middle in an axial direction. Two rotor pressure plates press the plurality of rotor punches. The rotating shaft is a hollow shaft. The plurality of rotor punches has the same structure. Each of the rotor punches is provided with a plurality of sets of positioning holes. The plurality of rotor punches is positioned and fixed to the rotating shaft through the plurality of sets of positioning holes to realize oblique poles between rotor segments. The motor rotor assembly structure is made by laminating one type of rotor punches.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: March 8, 2022
    Assignee: Hefei Jee Power Systems, Co., Ltd.
    Inventors: Lei Liu, Jialun Fan, Chunzhe Sun, Yuehua Li, Jingwei Cui
  • Permanent magnet motor
    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
  • Rotor core for rotating electrical machine
    Patent number: 11264861
    Abstract: A rotor core for a rotating electrical machine includes a laminated body that has insertion holes, a permanent magnet accommodated inside each of the insertion holes and fixed to the laminated body, and an end plate arranged at an end of the laminated body in the rotation axis direction. The laminated body includes annular flat metal plates that are stacked. A circumferential edge of the end plate is welded and fixed to circumferential edges of the metal plates such that the end plate is arranged at an end of the laminated body in the rotation axis direction to close openings of the insertion holes. A through-hole extends through an outer edge portion of at least one of an outermost metal plate of the laminated body or the end plate.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: March 1, 2022
    Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventor: Masaaki Takemoto
  • Axial flux machine
    Patent number: 11264877
    Abstract: An axial flux machine (AFM) includes a rotor rotatably disposed between a pair of fixed stators. The rotor and the stators are formed of tape-wound laminated cores of ferromagnetic material. In addition, the rotor includes multiple layers of angled magnets that circumscribe the rotor. Such configuration enables the axial flux machine to achieve a high airgap flux density while achieving a high saliency ratio and lowered cogging torque as compared to current generation AFMs.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: March 1, 2022
    Assignee: THE UNIVERSITY OF AKRON
    Inventor: Yilmaz Sozer
  • Apparatus for driving a compressor and method for assembling the apparatus
    Patent number: 11258326
    Abstract: A device, in particular to an electric motor, for driving a compressor of a gaseous fluid. The device comprises a rotor and a stator disposed such that they extend along a common longitudinal axis. The stator comprises connection leads developed as segments of conductor wires of coils. In a region of at least one end side, oriented in an axial direction, of the stator a cover element is disposed which is developed in the form of an axially oriented hollow cylinder with an inner surface and an outer surface. The cover element herein is with the inner surface in contact on an insulation element disposed on the stator and comprising a cylindrical wall. Between an outer side of the wall of insulation element and the inner surface of the cover element are disposed at least segments of the connection leads of the conductor wires.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: February 22, 2022
    Assignee: Hanon Systems
    Inventors: Bernd Guntermann, David Walisko, Stephan Heinrichs
  • Motor, compressor, and air conditioning apparatus
    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
  • Motor and compressor that uses same
    Patent number: 11251677
    Abstract: Provided are: a motor for which high strength can be obtained in a motor casing; and a compressor that uses the motor. This motor 10 has: a rotating shaft 12 provided in a rotatable manner; a rotor 32 that rotates integrally with the rotating shaft 12; a stator 31 that rotationally drives the rotor 32; and a motor casing 14 that is a cylindrical body for accommodating the rotor 32 and the stator 31, and has, on the outer circumferential surface thereof, ribs 22 extending in a circumferential direction.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: February 15, 2022
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Fuminori Kato, Yoshiyuki Kanemoto
  • Motor rotor and permanent magnet motor
    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
  • Sensing magnet assembly, rotor position sensing apparatus, and motor including same
    Patent number: 11251684
    Abstract: An embodiment relates to a sensing magnet assembly and a motor including the same, the sensing magnet assembly comprising: a sensing plate; a sensing magnet disposed on the plate; and an adhesive tape disposed between the sensing plate and the sensing magnet so as to fix the sensing magnet to the sensing plate, wherein the sensing plate includes a main body in which the adhesive tape is disposed, the main body includes a seating surface and a plurality of grooves or holes, and one side of the adhesive tape is disposed on the seating surface. Accordingly, the adhesive strength between the sensing magnet and the sensing plate can be improved.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: February 15, 2022
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Yong Joo Kim, Se Jong Kim
  • Brushless motor and method for producing same
    Patent number: 11251668
    Abstract: A brushless motor with a rotor (17) which is axially supported within a stator in a rotatable manner is provided. The rotor (17) includes: a cylindrical rotor core (26) into which a shaft (19) is inserted; a ring magnet (29) which is affixed to the outer circumference of the rotor core (26), with an adhesive (28) being interposed therebetween; and a magnet cover (53). The magnet cover (53) covers the end faces of the rotor core (26) and the ring magnet (29) in the axial direction. The magnet cover (53) is provided with an adhesive pocket (58) which is in communication with the rotor core (26) and the ring magnet (29).
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: February 15, 2022
    Assignee: MITSUBA Corporation
    Inventors: Shigeru Ogihara, Naoyuki Miyashita, Takahiro Uchidate, Miku Takahashi, Daiki Yanagisawa
  • Micro electrostatic motor and micro mechanical force transfer devices
    Patent number: 11245344
    Abstract: Disclosed is a micro electrostatic motor that includes a body having a first and a second face and having a chamber. A first membrane is disposed over the first face of the body and a rotatable disk is disposed in the circular chamber about a member. The disk is disposed in the circular chamber and is free to rotate about the member. The disk has on a first surface thereof a set of three mutually electrically isolated electrodes, with each of the electrodes having a tab portion and being electrically isolated from the member. A second membrane is disposed over the second face of the body and a pair of spaced electrodes are provided on portions of the second membrane, with the pair of spaced electrodes being isolated by a gap between the pair of electrodes. A cylindrical shaped member is disposed in the chamber electrically isolated from the three mutually electrically isolated electrodes on the disc.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: February 8, 2022
    Assignee: Encite LLC
    Inventor: Stephen A. Marsh
  • Rotor
    Patent number: 11245295
    Abstract: A rotor is provided. The rotor includes a main body, a plurality of magnets and a plurality of magnet-receiving slots. The plurality of magnet-receiving slots are disposed on the main body and disposed around a central axis. Each two adjacent magnet-receiving slots are symmetrical to each other. Each magnet-receiving slot includes a slot body and a first flux barrier connected with each other. Each magnet is contained in the corresponding slot body. Each first flux barriers includes a respective arc-cutting start point. A minimum arc-cutting distance is formed between the two respective arc-cutting start points. Each of the two respective arc-cutting start points is extended toward the central axis along an arc with a first arc length radius to define a first arc-cutting end point. The first arc length radius is greater than or equal to 0.2 times of the minimum arc-cutting distance.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: February 8, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yu-Hsiang Liu, Ta-Chien Yeh, Hsiang-Yun Hsiao, Chia-Hsiang Yang
  • Outer rotor brushless motor
    Patent number: 11245298
    Abstract: The technical scheme adopted by the present disclosure discloses an outer rotor brushless motor, which has a motor housing, a magnet, an end cover and a retainer ring, and a plurality of mounting separators all integrally molded with the motor housing are evenly distributed on the inner wall of the motor housing; between two adjacent mounting separators, a mounting groove is provided for a magnet to be mounted; the magnet is mounted within the mounting groove and is axially limited by means of the end cover and the retainer ring. The outer rotor brushless motor disclosed offers good reliability and high efficiency in assembly.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: February 8, 2022
    Assignee: NINGBO FUJIA INDUSTRIAL CO., LTD.
    Inventor: Fenghong Ding
  • Electromagnetic device
    Patent number: 11239715
    Abstract: In an electric motor, three-phase coils are provided to an armature disposed between an outside field system and an inside field system, and Halbach arrays are employed in the outside field system and the inside field system. Each of the Halbach arrays is divided by a number of divisions that is any number computed by adding two to a multiple of three. Permanent magnets are arrayed such that their magnetization directions are changed in sequence by steps of an angle computed by dividing one cycle's worth of electric angle by the number of divisions. Torque ripple is thereby suppressed in the electric motor.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: February 1, 2022
    Assignee: Kogakuin University
    Inventor: Mimpei Morishita