Patents Examined by Tran Nguyen
  • Patent number: 9954403
    Abstract: A rotor yoke is rotatable about an axis, is adapted for a plurality of permanent magnets to be mounted therein, and includes a central section, a peripheral section, and a connecting section. The peripheral section is formed with a plurality of outer slots for respectively receiving the permanent magnets. The connecting section is formed with a plurality of inner slots, and a plurality of magnetic reluctance units adjacent to outer slots and each including at least two magnetic reluctance slots that are radially aligned relative to the axis. Each of the magnetic reluctance slots permits portions of magnetic field lines generated by the permanent magnets to pass around the magnetic reluctance slots so as to increase density of the magnetic field lines.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: April 24, 2018
    Inventor: Chien-Kuo Yen
  • Patent number: 9954415
    Abstract: A permanent magnet of a rotor core of a rotor includes a first recess and a second recess, which are formed in an outer wall to correct a dynamic balance of the rotor. The permanent magnet is a bonded magnet that is formed by molding a mixture material, which is a mixture of resin and magnetic powder. The first recess and the second recess are formed at the time of molding the permanent magnet. Furthermore, the first recess and the second recess are formed at two axial ends, respectively, of the permanent magnet.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: April 24, 2018
    Inventors: Yuuji Hidaka, Masaya Ootake, Kiyoshi Nagata
  • Patent number: 9948150
    Abstract: Systems and methods for the construction of components such as laminations for the stator core of an ESP motor wherein particles of different materials are mixed and pressed together at an elevated temperature to form a composite material in the desired lamination shape. The materials are selected to provide characteristics such as high magnetic permeability from one material and high thermal conductivity from the other material. The particles of the different materials are pressed together at a temperature that is sufficiently high to fuse the particles together and form a composite material, but is also sufficiently low that the materials are not sintered. The individual materials therefore retain their original characteristics, and the composite material benefits from the high magnetic permeability of the first material and the high thermal conductivity of the other material.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: April 17, 2018
    Assignee: Baker Hughes Incorporated
    Inventors: Deepak Kumar, Carlos A. Prieto, Zhiyue Xu, Michael H. Johnson
  • Patent number: 9941760
    Abstract: Conductor terminals of a plurality of conductor wires that constitute a stator winding each extend outward at a first axial end of a stator core, and among the conductor terminals, conductor terminals through which same-phase electric power flows are respectively connected by crossover wires, and circumferential regions that are occupied by the crossover wires are separated from each other in a circumferential direction.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: April 10, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinsuke Kayano, Masaya Inoue, Masashi Nakamura
  • Patent number: 9935533
    Abstract: This squirrel-cage motor rotor includes a plurality of conductor bars provided at regular intervals along the circumferential direction of a rotor core, short-circuit rings connected to ends of the conductor bars, and reinforcement covers having axial-direction surfaces being in contact with axial-direction-end surfaces of the short-circuit rings. The reinforcement covers are enclosed by casting in the short-circuit rings. Holding rings are attached to the outer circumferential surfaces of the flange portions of the reinforcement covers and the outer circumferential surfaces of the short-circuit rings by interference fit.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: April 3, 2018
    Inventors: Hiroshi Ishikawa, Yoshiharu Takashima, Yoshiki Okada
  • Patent number: 9929623
    Abstract: A method and apparatus for operating a reluctance motor. The apparatus comprises a stator and a plate. The stator includes a plurality of electromagnetic coils having an overlapped configuration. Applying multi-phase current to the plurality of electromagnetic coils generates a magnetic field. The plate forms a virtual pole when a portion of the plate contacts the stator in response to the magnetic field. Rotating the magnetic field about a center axis through the stator rotates the virtual pole about the center axis.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: March 27, 2018
    Inventor: Robert J. Atmur
  • Patent number: 9929613
    Abstract: A motor includes a rotor and a stator. The stator is operable to electromagnetically induce movement of the rotor and includes stator teeth and a motor-board. A stator tooth includes a core material, a plurality of winding segments, and a bobbin. The bobbin includes a core receptacle for mechanically engaging the core material, radial-orientated sections to support and electrically isolate the winding segments, and connectors for electrically coupling the winding segments. The motor-board includes electrical receptacles for electrically mating with the connectors for each of the winding segments and traces for coupling the winding segments to a power source.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: March 27, 2018
    Assignee: Bison Gear & Engineering Corp.
    Inventors: Matthew Sherman Hanson, Edmund Peter Henke, Jr.
  • Patent number: 9901980
    Abstract: An induction rotor assembly having an induction cage that is formed using a combination of liquid and solid materials. The first and second end plates of the induction cage may be fabricated before the casting of the conductors of the induction cage. According to certain embodiments, the first and second end plates may be assembled with first and second molds and a rotor core to form a casting assembly. A liquid casting material may be injected into the casting assembly, wherein the liquid casting material may solidify within one or more core passageways of the rotor core, thereby forming the conductors of the induction cage. The first and second end plates may also include flow channels that may be configured to facilitate the flow of the liquid casting material in the casting assembly, and increase the area of contact between the liquid casting material, when solidified, and the end plates.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: February 27, 2018
    Assignee: Ingersoll-Rand Company
    Inventors: Petri Juhani Maki-Ontto, Fredrik Andreas Boxberg
  • Patent number: 9906083
    Abstract: A rotor for a dynamoelectric machine includes a rotor core having an outer periphery and at least a first set of magnets positioned within the outer periphery of the rotor core. The first set of magnets includes at least two block magnets and an arc magnet. The block magnets have a substantially parallel magnetization pattern and the arc magnet has a substantially radial magnetization pattern. The arc magnet has a concave surface facing the outer periphery of the rotor core. The first set of magnets defines a pole of the rotor. Rotors with other magnet configurations, and dynamoelectric machines and compressors incorporating such rotors, are also disclosed.
    Type: Grant
    Filed: September 29, 2012
    Date of Patent: February 27, 2018
    Inventors: Pingshan Cao, Xin Li, Xin Li
  • Patent number: 9906085
    Abstract: Small coil groups are each configured by connecting a plurality of winding bodies in series by passing crossover portions that are formed by bending first conductor terminals radially outward axially outside a coil end and joining the crossover portions to second conductor terminals that are subject to joining, the first conductor terminals that constitute first ends of the small coil group are disposed so as to be spaced apart from each other circumferentially around a radially inner side of a circular arc-shaped region that extends circumferentially around the coil end, the second conductor terminals that constitute second ends of the small coil group are arranged so as to be spaced apart from each other circumferentially around a radially outer side of the circular arc-shaped region of the coil end, and a stator winding is produced by connecting the small coil groups within the circular arc-shaped region.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: February 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masashi Nakamura, Shogo Okamoto, Atsushi Sakaue
  • Patent number: 9899902
    Abstract: An internal permanent magnet machine includes a wound stator, and a rotor core. The rotor core includes a plurality of first pole cavities, and a plurality of second pole cavities. One of a plurality of magnets is disposed within each of the pole cavities, and is injection molded into their respective cavity. The first pole cavities and the second pole cavities are each arranged in a pre-defined configuration, such that each pole cavity of the first pole cavities is identically positioned with one of the pole cavities of the second pole cavities within their respective pre-defined configurations, to define a corresponding pair of pole cavities. The pole cavity of the first pole cavities and the pole cavity of the second pole cavities of at least one of the corresponding pair of pole cavities define a different shape relative to each other.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: February 20, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Sinisa Jurkovic, Khwaja M. Rahman
  • Patent number: 9893590
    Abstract: A rotor portion includes an upper cylindrical portion and a lower cylindrical portion, each of which is configured to rotate together with a rotor. A stator portion includes a circuit board including a rotation detection portion located thereon. The lower cylindrical portion includes a lower balance correction portion. The upper cylindrical portion includes an upper balance correction portion. In addition, a detectable portion configured to be detected by the rotation detection portion is provided on the upper cylindrical portion.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: February 13, 2018
    Inventors: Tomoyoshi Sawada, Yuya Oura
  • Patent number: 9887613
    Abstract: A lithography device includes an eddy-current brake for damping the movement of a structural element of the lithography device. The eddy-current brake includes a plurality of magnets disposed in an arc-shaped arrangement, and a plurality of electrically conductive sheets arranged respectively between adjacent ones of the magnets. A relative movement between the magnets and the electrically conductive sheets in a direction to be damped inducing eddy currents in the electrically conductive sheets.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: February 6, 2018
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Alexander Vogler, Markus Hauf
  • Patent number: 9881355
    Abstract: Embodiments of the present invention can resolve molecules beyond the optical diffraction limit in three dimensions. A double-helix point spread function can be used to in conjunction with a microscope to provide dual-lobed images of a molecule. Based on the rotation of the dual-lobed image, the axial position of the molecule can be estimated or determined. In some embodiments, the angular rotation of the dual-lobed imaged can be determined using a centroid fit calculation or by finding the midpoints of the centers of the two lobes. Regardless of the technique, the correspondence between the rotation and axial position can be utilized. A double-helix point spread function can also be used to determine the lateral positions of molecules and hence their three-dimensional location.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: January 30, 2018
    Inventors: Rafael Piestun, Sri Rama Prasanna Pavani, Michael A. Thompson, Julie S. Biteen, William E. Moerner
  • Patent number: 9881019
    Abstract: A rotating electric machine system includes: a rotating electric machine including a stator and a rotor arranged with a gap to the stator; a casing configured to hold the stator; an electric power conversion apparatus held by the casing, and configured to drive the rotating electric machine; and a first cooling flow path arranged in a portion of the casing between the stator and the electric power conversion apparatus, via which cooling medium is caused to flow so as to cool the stator and the electric power conversion apparatus. And; the electric power conversion apparatus comprises a power module configured to include a power semiconductor element therein; the power module comprises a heat radiation fin; and the heat radiation fin is arranged to protrude toward a cooling medium side via an opening formed between the power module and the first cooling flow path.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: January 30, 2018
    Inventor: Takeshi Matsuo
  • Patent number: 9882446
    Abstract: A motor includes an armature arranged radially outside a rotor magnet, and a casing configured to fix the armature and hold upper and lower bearings configured to rotatably support a shaft at a radial center thereof. The armature includes a stator core, an insulator arranged to cover the stator core, coils each of which is defined by a conducting wire wound around a separate one of magnetic pole teeth with the insulator intervening therebetween, and passage lines each of which is arranged circumferentially between adjacent ones of the magnetic pole teeth to electrically connect one of the coils and another one of the coils with each other. The insulator includes magnetic pole tooth insulating portions arranged to cover a separate one of the magnetic pole teeth; and a core back insulating portion integral with each magnetic pole tooth insulating portion.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: January 30, 2018
    Inventors: Kazuya Kitaji, Keizo Furukawa
  • Patent number: 9876443
    Abstract: In an example embodiment, a textile-based energy generator includes first and second electrode substrates, each of the first and second electrode substrates including a textile structure and an energy generation layer between the first and second electrode substrates, the energy generation layer on at least one of the first and second electrode substrates, the energy generation layer configured to generate electrical energy by at least one of generating friction between different materials and contacting and separating the different materials.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: January 23, 2018
    Inventors: Jihyun Bae, Jongjin Park, Seongmin Kim, Byoungsun Lee
  • Patent number: 9876414
    Abstract: A method of molding a resin casing covering a stator of a motor may include preparing first and second molds; disposing the stator in the first mold; combining the molds; pouring a resin into the cavity; curing the resin; separating the molds; and taking the stator and resin casing from the mold. The stator may include a core, an insulator, and a coil. The core may include a core back surrounding and teeth that extend inward from the core back. The insulator may include wall portions inside the coil. The wall portions may be provided around the teeth and extend toward one side in an axial direction. One of the molds may include cylindrical surfaces contacting inner end faces of the teeth. The first mold may include wall supporting surfaces contacting or facing the inner surfaces of the wall portions. The wall supporting surfaces may be outside the cylindrical surfaces.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: January 23, 2018
    Inventors: Tatsuya Yoshida, Yasuyuki Arai, Satoru Yamamoto
  • Patent number: 9876402
    Abstract: An interior permanent magnet motor includes a stator and a rotor. The rotor includes a rotor core formed by laminating a plurality of plate members. The rotor core has a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted. At least one slit and at least one caulked portion are formed between a rotor outer peripheral surface of the rotor and a radially-outer insertion hole contour surface of the magnet insertion hole. At least a part of the caulked portion is positioned between a pair of width extended lines of the slit.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: January 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuchika Tsuchida, Masahiro Nigo, Kazuhiko Baba, Atsushi Ishikawa, Tomoaki Oikawa
  • Patent number: 9866083
    Abstract: A stator includes an annular stator core and a stator coil. The stator core has U-phase slots, V-phase slots and W-phase slots sequentially and repeatedly provided in pairs in its circumferential direction. The stator coil has U-phase, V-phase and W-phase windings respectively received in the U-phase, V-phase and W-phase slots. In each of the slots, there are received 2√óN in-slot portions of a corresponding one of the phase windings in radial alignment with each other, where N?2. Each of the phase windings consists of a pair of sub-windings connected parallel to each other. Each of the sub-windings includes winding sections that are classified into N winding section groups. Each of the winding sections of (N?1) winding section groups is connected via only serial connection, and each of the winding sections of the remaining one winding section group is connected via both serial connection and parallel connection.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: January 9, 2018
    Inventor: Akito Tamura