Patents Examined by Tran Nguyen
  • Patent number: 10020719
    Abstract: Provided is a linear actuator which is simple in structure, inexpensive to manufacture, in addition, has small magnetic leakage, and can provide a large inertial force without increasing the number of parts and weight.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: July 10, 2018
    Assignee: SUNSTAR INC.
    Inventor: Masahiro Nishiura
  • Patent number: 10014737
    Abstract: A rotor for an electric machine is mounted for rotation about an axis and includes a plurality of permanent magnets placed on a radial outer surface of the rotor for forming at least one magnetic pole pair. An anisotropically-soft sintered magnetic material having an easy direction and a hard direction is located in at least one section of the rotor radially further inward than the plurality of permanent magnets.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: July 3, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Ralf Fischer, Korbinian Petermaier, Rolf Vollmer
  • Patent number: 10008893
    Abstract: In an interior permanent magnet motor, each of permanent magnets has a radially-inner magnet contour surface, a radially-outer magnet contour surface, and a pair of side-end magnet contour surfaces. Each of magnet insertion holes has a radially-inner insertion hole contour surface, a radially-outer insertion hole contour surface, and a pair of side-end insertion hole contour surfaces. The radially-outer magnet contour surface and the radially-outer insertion hole contour surface are each formed by a first arc surface. The radially-inner magnet contour surface and the radially-inner insertion hole contour surface are each formed by a second arc surface and at least one straight surface configured to suppress movement of the permanent magnet along the magnet insertion hole having an arc shape.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: June 26, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Kazuchika Tsuchida, Kazuhiko Baba
  • Patent number: 10008892
    Abstract: An IPM motor for a vacuum pump suitable for use as a motor for a small vacuum pump is provided. The IPM motor for a vacuum pump includes: a rotor core in which a rotor shaft of the vacuum pump is pressed and which also has magnets embedded therein; and a stator core which surrounds the rotor core and around which stator windings are wound. The magnets per pole embedded in the rotor core are each split into two pieces and inserted in respective magnet slots in the rotor core. A hole for stress concentration relaxation is provided at either end of each pair of magnet slots in which permanent magnets split into two pieces are embedded in each pole. The rotor core has a multilayer structure having a plurality of rotor core laminations stacked vertically in an axial direction of the rotor shaft. The rotor core laminations stacked vertically are positioned with a skew angle determined by using the holes for stress concentration relaxation.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: June 26, 2018
    Assignee: Edwards Japan Limited
    Inventors: Isao Nakagawa, Manabu Nonaka
  • Patent number: 10008898
    Abstract: An electric motor stator includes an armature surrounding a longitudinal opening for receiving a shaft, with longitudinal fins protruding from an outer surface of said armature; windings are wound within the armature and protruding beyond ends of the armature; and encapsulant seals the windings to the armature, such that the encapsulant serves as an outer housing for the windings.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 26, 2018
    Assignee: R&D Dynamics Corporation
    Inventors: Alexander R. Nelson, Charles W. Buckley, Giridhari L. Agrawal
  • Patent number: 10003247
    Abstract: Provided is a linear actuator wherein a moving element can be moved in a direction normal to the direction of arrangement of coils. The moving element 1 has first to third magnets 6a-6c arranged in the X-direction. Each of the first to third magnets 6a-6c has N poles and S poles arranged in the ?-direction. The N poles and S poles of the second magnet 6b are shifted in the ?-direction relative to the N poles and S poles of the first magnet 6a. The N poles and S poles of the third magnet 6c are shifted in the ?-direction relative to the N poles and S poles of the second magnet 6b. A stator 2 has at least two salient poles 8a arranged in the ?-direction, and at least two coils 4a, 4b wound around the salient poles 8a.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: June 19, 2018
    Assignee: THK CO., LTD.
    Inventor: Junichiro Iwaki
  • Patent number: 10003226
    Abstract: A motor includes a cylindrical stator having a hollow, and a rotor rotatably arranged inside the stator. The rotor includes a cylindrical rotor body, a permanent magnet group provided to the rotor body to generate a magnetic field, and a flux barrier group to interrupt magnetic flux. The rotor body, the permanent magnet group and the flux barrier group are asymmetrically formed with respect to a center of poles of the rotor.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: June 19, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Il Kim, Seong Taek Lim
  • Patent number: 9991756
    Abstract: A stator for a motor of a compressor includes a stator core, insulator, coil, slot insulator, and inter-coil insulator. The stator core has a plurality of tooth portions arrayed circumferentially. The insulator is fitted to axial end faces of the stator core. The coil is wound on the tooth portions. The slot insulator is placed within slot portions that are spaces between circumferentially neighboring ones of the tooth portions, and which are interposed between the stator core and the coil. The inter-coil insulator is placed between circumferentially mutually neighboring windings of the coil. The inter-coil insulator is sheet shaped and folded over a width equal to double a sheet thickness at a folding-bottom portion extending along an axial direction. The folding-bottom portion is positioned on a distal end side of the tooth portions. Movement of the folding-bottom portion in a radial direction toward the rotor is restricted.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: June 5, 2018
    Assignee: Daikin Industries, Ltd.
    Inventors: Akinobu Ishizaki, Hidemi Tanji, Keiji Aota, Akio Mutou
  • Patent number: 9985505
    Abstract: A second core block is stacked on a first filler-vestige-accommodating steel sheet along a rotational axis and has a plurality of second magnet insertion holes. Each of the plurality of second magnet insertion holes is defined by a second inner wall. Each of a plurality of second permanent magnets is inserted into each of the plurality of second magnet insertion holes. Each of second spaces is provided between each of the plurality of second permanent magnets and the second inner wall. The filler fills the second spaces. The plurality of second magnet insertion holes have a plurality of second filler injection portions, respectively, via which the filler is injected into the plurality of second magnet insertion holes. The first filler-vestige-accommodating steel sheet has a plurality of first hole portions opposite to the plurality of second filler injection portions, respectively.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: May 29, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Satoshi Honjo
  • Patent number: 9985507
    Abstract: To provide a permanent magnet type motor having reduced torque ripple, in which torque ripples for electric angle sixth order and twelfth order are both reduced with a small skew angle. Driving is performed such that phases of currents flowing in two sets of three-phase armature windings 26-1 and 26-2 are different from each other by 20 degrees to 40 degrees in electric angle. A rotor 11 is composed of m stages of rotor component units arranged in the axial direction. The m stages of rotor component units are skewed to have a stage-skew structure such that a skew angle ? (unit: degree) between the adjacent units satisfies 26/m???43.2/m (m is an integer equal to or greater than 2) in electric angle.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: May 29, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masatsugu Nakano, Yu Hirotani, Satoru Akutsu, Toyoaki Udo, Yuji Takizawa
  • Patent number: 9979248
    Abstract: A permanent magnet (PM) machine includes a rotor and a stator assembly. The rotor includes a plurality of permanent magnets disposed about an axis of rotation. The stator assembly includes a stator body, a plurality of coil sides and a plurality of sintered iron magnetic wedges. The stator body includes a plurality of stator teeth defining a plurality of stator slots, each stator slot having an inside position and an outside position, such that each of the plurality of stator slots includes a first plurality of inside positions, and a first plurality of outside positions. The first plurality of coil sides are disposed in each of the first plurality of inside positions and the first plurality of outside positions. The first plurality of coil sides correspond to a first power phase. The first plurality of coil sides are electrically coupled to one another by a first plurality of end-coils.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: May 22, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Steven Joseph Galioto, Manoj Ramprasad Shah, Patel Bhageerath Reddy, Nathaniel Benedict Hawes
  • Patent number: 9979249
    Abstract: A bus bar unit may include a bus bar; and a bus bar holder comprising a resin material and configured to hold the bus bar, wherein the bus bar includes a plurality of members comprising a metal. The plurality of members may include a bent member including a radial branch, a circumferential branch, and a bent portion between the radial branch and the circumferential branch. The radial branch may include a terminal portion provided at a second end portion. The circumferential branch may include a first connection portion provided at a second end. A connection portion may be configured by connecting the first connection portion and a second connection portion provided in a second one of the plurality of members, and at least a portion of the connection portion of the bus bar is held in the bus bar holder.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: May 22, 2018
    Assignee: NIDEC CORPORATION
    Inventor: Keisuke Fukunaga
  • Patent number: 9979260
    Abstract: The invention relates to a method for liquid cooling of an electric motor of inner rotor type having a rotor of hub type and a stator provided with windings. The method includes supplying a cooling liquid for cooling to at least one end of the hub of the rotor, feeding supplied cooling liquid at least radially in the hub by means of the rotation of the hub, and by means of the rotation of the rotor throwing thus fed cooling liquid towards the stator. The invention also relates to a device and a platform to practice the method.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: May 22, 2018
    Assignee: BAE Systems Hägglunds Aktiebolag
    Inventors: Anders Söderholm, Viktor Lassila
  • Patent number: 9973055
    Abstract: An electric compressor including a compression mechanism, an electric motor driving the compression mechanism, a housing accommodating the compression mechanism and the electric motor, an inverter box located on an outer surface of the housing, an inverter substrate accommodated in the inverter box and having an inverter circuit supplying electric power to the electric motor, the inverter substrate having a first surface and a second surface that is a reverse surface of the first surface, a plurality of fastening members fixing the inverter substrate to the inverter box, and a reinforcing member having a first end fixed to the inverter box and a second end soldered to the first surface or the second surface of the inverter substrate. The reinforcing member extends toward the first surface or the second surface of the inverter substrate in the inverter box. The reinforcing member is not electrically connected to the inverter circuit.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: May 15, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Ken Suitou, Kazuhiro Kuroki, Takuro Mizuno, Tatsuya Koide, Yusuke Kinoshita
  • Patent number: 9973047
    Abstract: The invention relates to a rotating electric machine, such as a dynamometer. The rotor of the machine comprises a circular row of resultant magnetic poles of which the polarity forms an alternation of opposed poles. The resultant poles each include a pair of permanent magnets in a “V”, each equipped with a north pole N, a south pole S, and opposed faces, where the magnet poles are located. In each resultant pole the magnets are disposed so as to have faces having identical polarities, which faces are oriented radially outwardly, facing towards one another, thus forming therebetween an angle ? between 90° and 110°, which makes it possible to increase the efficiency. The invention also relates to a turbomachine test stand equipped with a dynamometer enabling a recovery of electrical energy. The invention also relates to a hybrid motor vehicle propelled by the rotating electric machine.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: May 15, 2018
    Assignee: Safran Aero Boosters SA
    Inventors: Alain Lacroix, Quac Hung Tran, Benoit Meys
  • Patent number: 9966809
    Abstract: A rotor of an electrical rotating machine includes a first rotor core, a second rotor core which overlaps the first rotor core in an axial direction, a non-magnetic substance layer which is interposed between the rotor cores, and a plurality of permanent magnet portions which are embedded in each rotor core. Each of the rotor cores includes a plurality of flux barrier portions and a plurality of effectual magnetic flux portions which are alternately arranged on an outer circumferential surface thereof. The flux barrier portion of the first rotor core overlaps both of a portion of the flux barrier portion of the second rotor core and a portion of the effectual magnetic flux portion of the second rotor core in the axial direction such that, in the adjacent rotor cores, the effectual magnetic flux portions do not overlap each other in the axial direction.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: May 8, 2018
    Assignee: NIDEC CORPORATION
    Inventor: Tomoya Ueda
  • Patent number: 9964147
    Abstract: A magnetic bearing for the mounting of a shaft, in particular for a spinning rotor of an open-end spinning device, features several pole shanks of a stator for the active radial magnetic mounting of the shaft in two degrees of freedom, which in each case are surrounded by a coil and are radially arranged to each other, in such a manner that they define an opening for the shaft. In the area of the opening, the pole shanks are connected to each other. For the passive axial mounting of the shaft, at least one permanent magnet is arranged between the coils and the opening. The invention also includes a shaft for mounting with at least one corresponding magnetic bearing. The shaft is a composite component, which at least partially consists of non-ferromagnetic material. In the area of the radial and axial mounting, a component made of a ferromagnetic material is arranged.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: May 8, 2018
    Assignee: Rieter CZ s.r.o.
    Inventors: Milan Moravec, Jiri Sloupensky, Siegfried Silber, Andreas Josef Pröll, Peter Dirnberger
  • Patent number: 9966824
    Abstract: A first stator core and a second stator ore are configured by arranging core block pairs into an annular shape, the core block pairs being configured by stacking together core blocks so as to be spaced apart axially, each of the core blocks including a core back portion and one tooth, and a permanent magnet is configured so as to be divided into a plurality of magnet blocks that each include: a base portion; one shaft portion that protrudes radially inward from an inner circumferential surface of the base portion; and flange portions that protrude on two circumferential sides from a radially inner end portion of the shaft portion, the magnet blocks being held between the core block pairs such that the base portion and the shaft portion are positioned inside the core block pairs and such that the flange portions protrude circumferentially from the core block pairs.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: May 8, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Toru Ogawa, Hideaki Arita, Akihiro Daikoku, Taiga Komatsu, Yoshihiro Miyama
  • Patent number: 9963037
    Abstract: The earth's magnetic field has not been mined as a source of energy for electric vehicles. With average field strength of 0.5 Tesla around the world it is easy to understand why it has been overlooked. A disruptive technology is needed to mine the earth's magnetic field for powering electric vehicles. Such a technology, graphene, is now at an early stage of development with excellent properties in the form of high conductivity, low resistivity sheets that are durable, light weight, and low cost. Electrical properties of multiple sheets of graphene provide a significant multiplier to earth's weak magnetic field yielding a feasible source of ecologically clean power for electric vehicles. Graphene based EcoCharge systems can be mounted on a vehicles drive shaft and axles putting graphene in motion to mine the earth's magnetic field. Estimates show that EcoCharge can generate 15.1 kW at 60 mph while weighing only 10 oz.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: May 8, 2018
    Inventor: Dennis Drake McCrady
  • Patent number: 9954404
    Abstract: An electric machine includes a stator having 48 grooves and 48 tooth coils, and a rotor interacting with the stator. The rotor has eight magnetic poles along an external circumference of the rotor in an annular arrangement, with adjacent magnetic poles defining angular distances defined successively at 41.25°, 39.75°, 41.25°, 57.75°, 41.25°, 39.75°, 41.25° and 57.75°. The angular distances have a tolerance range of 0.4°. The electric machine has a pole arc between 0.6 and 0.7.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: April 24, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Rolf Vollmer