Patents Examined by Michael Andrews
  • Patent number: 10644568
    Abstract: The stator frame includes: a spiral groove which is provided as a flow path of a coolant from one end side to the other end side in an axis direction spirally along the circumferential direction of an outer circumferential surface; and annular grooves which individually communicate with the end portions of the spiral groove on the one end side and the other end side in the axis direction and which are provided annularly along the circumferential direction of the outer circumferential surface. The spiral groove is formed such that a groove depth is shallow in regions on the one end side and the other end side in the axis direction and the groove depth is deep in a region around a center in the axis direction.
    Type: Grant
    Filed: September 29, 2018
    Date of Patent: May 5, 2020
    Assignee: FANUC CORPORATION
    Inventor: Yasuo Yamada
  • Patent number: 10621541
    Abstract: A dynamoelectric machine includes a shaft, a rotor radially outward from the shaft with the rotor and shaft arranged to rotate in unison, a stator radially outward from the rotor with the stator being stationary relative to the rotor and shaft, and a heat transfer feature adjacent to and radially outward from the stator. The heat transfer feature includes a base encasing the stator, the base having a first end, a second end, and an axial middle; a first set of fins extending radially outward from the base adjacent the first end and the second end; and a second set of fins extending radially outward from the axial middle of the base with the second set of fins each having a smaller surface area and being closer to one another than the first set of fins.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: April 14, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Michael J. Andres, Robert Scott Downing
  • Patent number: 10615676
    Abstract: Various embodiments are described herein for switched reluctance machine configurations. In at least one embodiment, a switched reluctance machine configured according to the teachings herein comprises a stator including a predetermined number of salient stator poles (Ns), a rotor rotatably mounted with respect to the stator, with the rotor comprising a plurality of salient rotor poles, and a plurality of coils provided around the predetermined number of stator poles to form at least one phase of the switched reluctance machine, where the rotor poles and the stator poles are symmetrically disposed, and a number of rotor poles is related to 0? and a number of phases according to: i) (Ns/m)k ceil (mod(k,m)/m) number of phases, and ii) (Ns/m)k ceil (mod(k,m/2)/m/2) for an even number of phases, where m is the number of phases, and k is a configuration index based on Ns and m.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: April 7, 2020
    Assignee: Enedym Inc.
    Inventors: Berker Bilgin, Ali Emadi
  • Patent number: 10612592
    Abstract: An integrated journal bearing (IJB) includes a shaft extending in an axial direction, a housing through which the shaft extends in the axial direction, the housing surrounding the shaft in a radial direction, an active magnetic bearing (AMB) arranged within the housing and surrounding the shaft in the radial direction, and at least a first fluid film journal bearing (JB) arranged within the housing and surrounding the shaft in the radial direction. The first JB is axially adjacent to the AMB such that first JB and the AMB do not share a common radial clearance, while both are commonly flooded with oil. A controller in signal communication with the AMB can be variously configured to supply current thereto to operate the AMB by controlling a magnetic force generated thereby.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: April 7, 2020
    Inventor: Aly El-Shafei
  • Patent number: 10608511
    Abstract: An electromagnetic compatibility (EMC) terminal ground for a brushless direct current (BLDC) motor is disclosed. The EMC terminal ground includes a metal ground configured to be applied to the BLDC motor, the BLDC motor including: a stator block configured to include a base portion and a ball bearing reception portion; a rotor configured to be coupled to the stator block; a stator core located inside the rotor; a shaft configured to pass through the rotor and the stator core; a heat sink installed at the lower end of the stator block; and a PCB cover configured to cover the lower end portion of the heat sink; and a pair of ball bearings disposed at intervals; wherein the metal ground grounds the stator core, the rotor, and the heat sink.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: March 31, 2020
    Assignee: Hyoseong Electric Co., Ltd.
    Inventor: Jingeun Jung
  • Patent number: 10608493
    Abstract: There is provided a stator for a rotary electric machine including a stator core including a plurality of teeth arranged along a circumferential direction and a plurality of slots formed between the teeth adjacent to each other, and multi-phase coils in which windings of different phases are respectively wound around the teeth by distributed winding. Each of the slots is provided therein with a plurality of windings forming the coils. The plurality of windings of the different phases are arranged to be overlapped in the circumferential direction in at least a part of the plurality of slots.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: March 31, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yoshiyuki Adachi, Toshitaka Kato, Masayuki Inada, Mitsuo Nakazumi
  • Patent number: 10608499
    Abstract: A motor case of a vibration motor has a first tubular part and a first inward flange integrally formed in a flange shape in the inward direction from the upper opening end of the first tubular part. A rotary shaft 30 is supported in an upper oil-impregnated bearing and a lower oil-impregnated bearing, and an upper portion of the rotary shaft protrudes from the motor case. The rotary shaft is inserted into a soft washer, with the soft washer between the rotor unit and the upper oil-impregnated bearing. A weight is eccentrically fixed to the upper portion of the rotary shaft, and an attraction magnet is fixed to the motor case and attracts the weight toward the motor case side. A retainer, which prevents the upper oil-impregnated bearing from coming out in the upward direction, is formed on the motor case.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: March 31, 2020
    Assignee: Tokyo Parts Industrial Co., Ltd.
    Inventor: Hidekazu Imai
  • Patent number: 10605057
    Abstract: Certain aspects of the subject matter described here can be implemented in a downhole-type electric submersible pump system. An electric machine can be disposed downhole in a wellbore. The electric machine is coupled to rotate with an impeller that can be disposed downhole in the wellbore. The electric machine includes a stator assembly with at least three stator sections axially arranged and spaced apart from each other along a longitudinal axis of the electric machine. The electric machine also includes a rotor assembly with at least three rotor sections arranged axially along the longitudinal axis of the electric machine. The rotor assembly is carried within and supported to rotate by the stator assembly.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: March 31, 2020
    Assignee: Upwing Energy, LLC
    Inventors: Co Si Huynh, John Stout, Patrick McMullen, Kuo-Chiang Chen
  • Patent number: 10608498
    Abstract: An actuator having a switched reluctance motor and a plunger assembly. The switched reluctance motor has a stator and a rotor. The stator has a plurality of stator poles and a plurality of stator windings. Each of the stator windings is wound about a corresponding one of the stator poles. The rotor is rotatable about an axis and has a plurality of rotor poles. The plunger assembly has a plunger and at least one spring. The plunger is co-axially received in the rotor and movable in an axial direction along the axis. The at least one spring is disposed in a force transmission path that includes the plunger and is configured to permit movement of the plunger along the axis in opposite axial directions. The plunger assembly is being driven by the rotor.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: March 31, 2020
    Assignee: American Axle & Manufacturing, Inc.
    Inventor: Curt D. Gilmore
  • Patent number: 10594180
    Abstract: A rotor for an electric machine includes a circular rotor base having a first surface, a second surface, and a circumferential outer edge extending from the first surface to the second surface, a plurality of magnets disposed proximate the circumferential outer edge of the circular rotor base, and a plurality of flux guides. Each magnet has a first surface and a second surface. The first surface of each magnet is attached to the first surface of the circular rotor base, and the second surface of each magnet defines a first shape. Each flux guide is attached to the second surface of a different magnet and has a first surface attached to the second surface of a first respective magnet and a second surface opposite the first surface. The second surface of each flux guide defines a second shape different than the first shape of the magnets.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: March 17, 2020
    Assignee: Regal Beloit America, Inc.
    Inventors: Greg Heins, Mark Thiele, Dean James Patterson, Matthew J. Turner
  • Patent number: 10576815
    Abstract: Provided is a rotary electric machine housing and a rotary electric machine equipped with the same. The housing allows the reduction of press fitting force required in each of two press fitting steps and has a high cooling effect. This rotary electric machine housing includes an internal cylinder 10 allowing press fitting of a stator 20 along an inner diameter end of the internal cylinder. The internal cylinder 10 has an internal cylinder-side tapered face on its outer diameter end surface. The housing further includes an external cylinder 11 having an external cylinder-side tapered face on an inner diameter end of the external cylinder. The external cylinder-side tapered face fits onto the internal cylinder-side tapered face.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: March 3, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Riichi Nagao, Shinji Yamazaki
  • Patent number: 10578157
    Abstract: A magnetic bearing may include an inner ring and an outer ring arranged concentrically. The inner ring and the outer ring may be mounted rotatably relative to each other by way of axial and radial magnets. The magnetic bearing may also include a back-up bearing, which is integrated into at least one of the outer ring or the inner ring both in an axial direction and in a radial direction. The outer ring may be multipiece and may include a recess that opens inwards and receives the inner ring. Further, the back-up bearing may be made of aluminum, austenitic steel, bronze, or ceramic, and the back-up bearing may operate as a shielding device that shields magnetic fields emitted by the axial and radial magnets from one another.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: March 3, 2020
    Assignees: THYSSENKRUPP ROTHE ERDE GMBH, THYSSENKRUPP TRANSRAPID GMBH, THYSSENKRUPP AG
    Inventors: Klaus Pantke, Qinghua Zheng, Erhard Lampersberger, Bernd Lüneburg, Jörg Rollmann, Florian Dignath
  • Patent number: 10574102
    Abstract: A rotary electrical machine comprises a stator and a rotor having an axis of rotation, wherein, on a plane radial to the axis of rotation has a rotor tooth with an arc of a circle. The arc is defined by a centre situated on the axis of symmetry of the tooth, a first point at an intersection between the axis of symmetry and a circle centred on the axis of rotation, and an outer radius. A second point is situated on an axis which passes via the axis of rotation, and forms an angle of 360° divided by a number equal to twice the number of magnetic poles. The second point is situated from the axis of rotation an amount equal to the outer radius decreased by an allowance. A ratio between the allowance and the outer radius is between 0.015 and 0.07.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: February 25, 2020
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Jérome Legranger, Khadija El Baraka, Svetislav Jugovic
  • Patent number: 10574111
    Abstract: A stator coil has a first layer wound around a tooth portion of a stator core-sequentially from the radially outer side to the radially inner side of a stator, and is wound while a winding direction is reversed for each layer. If the outermost layer is denoted by n (n is an odd number equal to or greater than 3) and the final turn in each layer is denoted by m (m is equal to or greater than 2), the m-th turn in the n-th layer is wound on the radially outer side of the stator, the stator coil on the radially inner side is lane-changed on a shorter-side tooth portion, and a part of the stator coil on the radially outer side in the outermost layer is lane-changed on a longer-side tooth portion.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: February 25, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryuji Kitamura, Shogo Okamoto, Masaya Inoue
  • Patent number: 10566863
    Abstract: A rotor core in which magnets are embedded is formed by stacking a plurality of steel sheets. Each steel sheet which has a disk shape has: six magnet insertion holes formed so as to allow permanent magnets to be inserted therein as a whole; circumferential-direction bridge portions connecting, in the circumferential direction, radially-outer-side steel sheets each formed at the peripheral part of the steel sheet, between the magnet insertion holes; and radial-direction bridge portions formed between the magnet insertion holes. The circumferential-direction bridge portions and the radial-direction bridge portions have coined portions having decreased sheet thicknesses and protruding in an arc shape in the sheet-thickness direction. The coined portions having decreased sheet thicknesses suppress short-circuit of a magnetic flux between magnetic poles, and formation of the arc shapes absorbs extension of these portions caused by a coining work, to suppress deformation of the steel sheet.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: February 18, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuhiro Shono, Yuki Tamura, Ryohei Uno, Koji Masumoto
  • Patent number: 10563644
    Abstract: The disclosure relates to a device for improving a vacuum in the housing of a machine, in particular a centrifugal-mass energy store, comprising a rotor, for example a shaft having a centrifugal mass arranged thereon, which rotor is supported on at least one superconducting bearing in a contactless manner and is arranged in a vacuum container. In order to maintain the operating state of the superconducting bearing, the superconducting bearing is thermally connected to a cold source cooled by a cryogenic medium. According to the invention, the vacuum in the vacuum container is improved by means of an adsorber thermally connected to a cooling apparatus. The cooling of the adsorber occurs preferably by means of evaporated cooling medium from the superconducting bearing.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: February 18, 2020
    Assignees: Messer Industriegase GmbH, Messer Group GmbH
    Inventors: Thomas Kutz, Friedhelm Herzog
  • Patent number: 10566858
    Abstract: A stator frame includes a flow path which is formed spirally from one end side to the other end side in the axial direction of the stator frame between an inner circumferential surface and an outer circumferential surface while circling along a circumferential direction of the stator frame and within which a coolant is circulated, where a side wall portion which isolates the adjacent parts of the flow path, an inner wall portion which isolates the flow path from the inner circumferential surface of the stator frame and an outer wall portion which isolates the flow path from the outer circumferential surface of the stator frame are integrally formed.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: February 18, 2020
    Assignee: FANUC CORPORATION
    Inventor: Shinobu Takano
  • Patent number: 10559991
    Abstract: A motor comprises a stator comprising at least one core; a coil wound on the at least one core of the stator; a rotor having a rotor pole and being rotatably mounted relative to the stator; and at least one magnet disposed between the rotor and the stator. The at least one core comprises a composite material defined by iron-containing particles having an alumina layer disposed thereon.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 11, 2020
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah, Jayaraman Krishnasamy
  • Patent number: 10559990
    Abstract: A motor comprises a stator comprising at least one core; a coil wound on the at least one core of the stator; a rotor having a rotor pole and being rotatably mounted relative to the stator; and at least one magnet disposed between the rotor and the stator. The at least one core comprises a composite material defined by iron-containing particles having an alumina layer disposed thereon.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 11, 2020
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah, Jayaraman Krishnasamy
  • Patent number: 10541591
    Abstract: A stator for an axial flux machine includes a back iron, a plurality of stator teeth extending from the back iron, and a plurality of tooth tips attached to the stator teeth. The back iron and the stator teeth include a first material. Each stator tooth has a first end proximate the back iron and a second end. Each tooth tip is attached to the second end of a different stator tooth. The tooth tips include a second material different than the first material.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: January 21, 2020
    Assignee: REGAL BELOIT AUSTRALIA PTY, LTD.
    Inventors: Dean James Patterson, Mark Thiele, Greg Heins, Matthew J. Turner