Patents Examined by Tran Nguyen
  • Brushless motor
    Patent number: 9698636
    Abstract: A brushless motor includes: a rotor including a magnet; and a stator including at its center a space for placing the rotor. The rotor includes: a rotor core; and a plurality of magnets. The rotor core includes a plurality of magnet holders radially formed around a rotating shaft. The magnets are housed in the magnet holders such that the same magnetic poles of adjacent magnets face each other in a circumferential direction of the rotor core, and the stator includes a plurality of teeth formed toward the center to face the rotor. Given that a radius of curvature of an outer circumference of the rotor core is R, a width of an end of the teeth in a circumferential direction is W, and a maximum outer diameter of the rotor core is L, 0.9?R/W?4.2 and R<L/2 are met.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: July 4, 2017
    Assignee: MABUCHI MOTOR CO., LTD.
    Inventor: Yuuichirou Matsuoka
  • Wound field rotating machine with capacitive power transfer
    Patent number: 9692279
    Abstract: An electrical rotating machine, such as a generator or motor, communicates power from a stationary location to the rotating rotor of the rotating machine via opposed pairs of capacitor plates, one plate of each pair rotating with the rotor and one plate of each pair fixed not to rotate. In one embodiment, separation between the plates of the pair is provided by a cushion of entrapped air.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: June 27, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Daniel Colin Ludois, Justin Kyle Reed, Kyle Hanson
  • Motor
    Patent number: 9692274
    Abstract: A motor may include a rotor having a permanent magnet on an outer peripheral face of a rotation shaft and a fixed body having a stator, an opposite-to-output side radial bearing member, and an opposite-to-output side end plate. The opposite-to-output side radial bearing member may be formed with a bearing part, a flange part, and a recessed part recessed toward an output side. An end part on the output side of the bearing part may be located on the output side relative to the end part on the opposite-to-output side of the stator, and an end part on the opposite-to-output side of the rotation shaft protruded toward the opposite-to-output side from the shaft hole may be accommodated in an inside of the recessed part and is located on the output side relative to the end part on the opposite-to-output side of the fixed body in the axial line direction.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 27, 2017
    Assignee: NIDEC SANKYO CORPORATION
    Inventor: Kazumi Furubayashi
  • Polyphasic multi-coil electric device
    Patent number: 9685827
    Abstract: A polyphasic multi-coil generator includes a drive shaft, at least first and second rotors rigidly mounted on the drive shaft so as to simultaneously synchronously rotate with rotation of the drive shaft, and at least one stator sandwiched between the first and second rotors. A stator array on the stator has an array of electrically conductive coils mounted to the stator in a first angular orientation about the drive shaft. The rotors each have an array of magnets which are circumferentially equally spaced around the rotor and located at the same radially spacing with respect to the centre of the rotor and the drive shaft at a first angular orientation relative to the drive shaft. The arrays of magnets on adjacent rotors are off-set by an angular offset relative to one another.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 20, 2017
    Assignee: EXRO TECHNOLOGIES INC.
    Inventor: Jonathan Gale Ritchey
  • Metal ribbon stator and motor comprising same
    Patent number: 9680339
    Abstract: A stator made from a ribbon of metal having multiple layers of slit metal, and motors made therefrom are described. A ribbon having multiple layers of metal is formed into a stator such as by flattening or pleating the ribbon to form each pole of a stator having a plurality of stator teeth, or poles. The stator formed from the metal ribbon may be configured into any suitable type of motor, such as an axial transverse flux motor. A magnetic flux return may also be made out of metal ribbon.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: June 13, 2017
    Assignee: Moog Inc.
    Inventor: David Calley
  • Permanent magnet rotor
    Patent number: 9673671
    Abstract: A permanent magnet rotor for a motor, the permanent magnet rotor including an iron core and a permanent magnet. The iron core includes an annular ring having a central axial bore and a plurality of magnetic induction blocks protruding outward from an outer side of the annular ring. Between two adjacent magnetic induction blocks form a radial recess for mounting the permanent magnets. The magnetic induction blocks at both sides of an opening of the radial recess protrude with a hook block. The section of an outer side surface of the magnetic induction blocks is a circular-arc line and the outer side surface employs a point with a distance deviating from the center of the central axial bore as a center of circle.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: June 6, 2017
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR MANUFACTURING CO., LTD.
    Inventor: Mingpan Pan
  • Individual-segment rotor having retaining rings
    Patent number: 9673672
    Abstract: The aim is to propose an individual-segment rotor that is simple to construct and suitable for series production. Therefore, an individual-segment rotor having a plurality of laminated core segments (2) arranged in a star shape and a permanent magnet (1) between each pair of adjacent laminated core segments (2) is provided, whereby the laminated core segments and the permanent magnets are arranged in a hollow cylindrical assembly. The laminated core segments each have a plurality of individual sheets, which are rigidly connected to one another. The hollow cylindrical assembly has a groove on each of two outer edges, into which groove a ring (11) is inserted in order to fasten the assembly.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: June 6, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Lars Pannier, Jürgen Pawellek, Benjamin Volkmuth, Rolf Vollmer, Sebastian Waider
  • Fixture for securing temperature detection element, motor, and method of securing temperature detection element
    Patent number: 9673687
    Abstract: A fixture which secures a temperature detection element to a winding provided around a stator core of a motor, includes a main body to be inserted into a gap between the stator core and the winding, and an engagement portion formed on one end side of the main body on one side of the main body to engage with the rim of the opening of the winding. On the one side of the main body a recess is formed to house a temperature sensitive part of the temperature detection element. The depth of the recess is less than the maximum thickness of the temperature sensitive part of the temperature detection element.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: June 6, 2017
    Assignee: FANUC CORPORATION
    Inventors: Suguru Takamizawa, Yoshifumi Shimura, Masatoyo Sogabe
  • System and method for preventing stator permanent magnet demagnetization during vacuum pressure impregnation
    Patent number: 9673667
    Abstract: A permanent magnet electrical machine includes a stator having conductive windings wound thereon and one or more permanent magnets embedded in the stator. A magnetic keeper element is positioned on the stator so as to form a magnetic flux path with the permanent magnets, with the magnetic keeper element closing the magnetic flux path of the permanent magnets by providing a low reluctance flux path to magnetic flux generated by the permanent magnets. A vacuum pressure impregnation (VPI) process is performed on the stator to increase a thermal conductivity of the windings, with the VPI process including a curing step that is performed at a selected temperature. The magnetic keeper element sets an operating point of the permanent magnets to an internal flux density level above a demagnetization threshold associated with the selected temperature at which the curing step is performed.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: June 6, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Tsarafidy Raminosoa, James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie
  • Rotor slot liners
    Patent number: 9667112
    Abstract: A slot liner for a rotor assembly in one embodiment includes a metallic support member and a coating. The coating is disposed on at least one side of the metallic support member, and includes a mixture of a filler and a polyimide resin. The filler is a high thermal conductivity electrical insulating (HTCEI) filler, and includes particles of at least one of boron nitride, aluminum nitride, or a diamond material.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: May 30, 2017
    Assignee: General Electric Company
    Inventors: Wei Zhang, Xiaochuan Jia, Charles T. Sigler, Xiaomei Fang, Hao Huang, David Dimitri Karipides
  • Electric actuator with a manual drive means
    Patent number: 9660501
    Abstract: An actuator including a frame, an electric motor fastened to the frame and to a rotor that is constrained to rotate with an outlet shaft, and a connector electrically connected to the motor and secured to the frame to be connected to a complementary connector. The actuator includes a secondary drive device having a secondary shaft having a first end that extends outside the frame and is arranged to be coupled to rotate with a rotary drive tool, a second end of the secondary shaft in rotation coupled with the outlet shaft, and an activation rod opening out into the connector is secured to the frame and arranged to prevent the secondary shaft from being coupled in rotation with the outlet shaft only when the complementary connector is connected to the connector secured to the frame.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: May 23, 2017
    Assignee: SAGEM DEFENSE SECURITE
    Inventors: Severi Viennot, Thierry Cartry, Mickael Werquin, Louis Chavignier
  • Cooling arrangement for an electric motor
    Patent number: 9653967
    Abstract: An electric motor includes a stator operable to produce a magnetic field and defining an opening, and a rotor at least partially disposed within the opening. The rotor includes a shaft extending along a rotational axis, a first rotor magnetic core portion including a plurality of laminations stacked contiguously on the shaft, and a second rotor magnetic core portion coupled to the plurality of laminations. The first rotor magnetic core portion and the second rotor magnetic core portion cooperate to define the rotor magnetic core. A plurality of windings is coupled to the rotor magnetic core and an air flow path is formed as part of the second rotor magnetic core portion. The air flow path includes an axial portion that passes through the shaft axially along the rotational axis and a radial portion that extends radially outward through the second rotor magnetic core portion.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 16, 2017
    Assignee: TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED
    Inventor: Rafael Maynez
  • Interior permanent magnet motor, compressor and refrigeration and air conditioning apparatus
    Patent number: 9647501
    Abstract: A rotor outer peripheral surface includes first arcs and second arcs. The first arc is positioned in a magnetic pole center portion. The second arc is positioned in an inter-pole portion. The first arc bulges toward a radially outer side to a higher degree than the second arc. An air gap is varied in a manner of being increased as approaching from each of the magnetic pole center portions to the adjacent inter-pole portions. A hole defining portion of a magnet insertion hole on the radially outer side has a curvature of a third arc, and a hole defining portion of the magnet insertion hole on a radially inner side has a curvature of a fourth arc. An opening angle of a tooth tip portion, an opening angle of the first arc, and an opening angle of the third arc coincide with each other.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: May 9, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Kazuhiko Baba, Kazuchika Tsuchida
  • Stator slot liners
    Patent number: 9641037
    Abstract: A slot liner for a stator assembly in one embodiment includes a mesh structural member and a coating. The coating is disposed on at least one side of the mesh structural member, and includes a mixture of a filler and a polyimide resin. The filler is a high thermal conductivity electrical insulating (HTCEI) filler, and includes particles of at least one of boron nitride, aluminum nitride, or a diamond material.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: May 2, 2017
    Assignee: General Electric Company
    Inventors: Wei Zhang, RiAn Zhao, Xiaomei Fang, Matthew Hal Littlejohn
  • Electric motor with embedded permanent magnet, compressor, and refrigeration/air-conditioning device
    Patent number: 9634531
    Abstract: In an interior permanent magnet motor, at least one magnetic pole center slit and a plurality of side slits are formed between a rotor outer peripheral surface of a rotor and a radially-outer insertion hole contour surface of a magnet insertion hole. The plurality of side slits are formed so that at least one side slit is formed on each of both sides of the magnetic pole center slit in a width direction. The area of the magnetic pole center slit is smaller than the area of each of the plurality of side slits. A width of each of the plurality of side slits is larger than an interval between the adjacent slits.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: April 25, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiko Baba, Masahiro Nigo, Kazuchika Tsuchida, Atsushi Ishikawa
  • Motor grounding seal
    Patent number: 9634547
    Abstract: A shaft seal assembly is disclosed having a stator including a main body and axial and radial projections therefrom. The rotor may be radially extended to encompass the axial and radial projections from said stator. A passageway formed between the radial projection of stator and rotor results in an axial passageway having its opening facing rearwardly from the rotor and away from the source of impinging coolant and/or contaminant. A concentric circumferential receptor groove in the stator facing the housing allows insertion of a conductive insert for transmission of electrostatic charge away from the shaft through the shaft seal assembly to the housing and ground. The receptor groove is opposite the axial passageway and provides for both a substantially lower contaminant environment and improved engagement with the conductive insert.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: April 25, 2017
    Assignee: Inpro/Seal LLC
    Inventors: David C. Orlowski, Thomas D. Coe
  • Motor provided with terminal block
    Patent number: 9634537
    Abstract: A motor which can reliably prevent varnish from ending up entering a terminal block. The motor is provided with a terminal block to which lead wires of coils are connected. The terminal block has a bottom wall, a plurality of side walls which face each other, a terminal part which is provided between adjoining side walls, and a dam wall which is arranged at a position closer to the coils than the terminal part and which is formed integrally with the bottom wall and side walls without clearance. The dam wall has a lead wire holding part for holding a lead wire.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: April 25, 2017
    Assignee: Fanuc Corporation
    Inventor: Shinichi Kinoshita
  • Electric machine with combined insulator and terminal assembly
    Patent number: 9627948
    Abstract: An electronics package for an alternator includes an electrically conductive carrier member and a terminal assembly engaging the carrier member. The carrier member includes an inner side, an outer side, and at least one passage extending from the inner side to the outer side. A plurality of switches are connected to the carrier member. The terminal assembly includes an electrically insulative portion and a plurality of electrical traces extending through the electrically insulative portion. The electrically insulative portion includes a post extending through the at least one passage of the carrier member, a first shoulder engaging the outer side of the carrier member, and a second shoulder engaging the inner side of the carrier member. The post, the first shoulder, and second shoulder are all formed as a unitary component.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: April 18, 2017
    Assignee: REMY TECHNOLOGIES LLC
    Inventors: Christopher Bledsoe, Kirk Neet
  • Stator for an electric motor
    Patent number: 9627937
    Abstract: A stator for an electric motor includes a plurality of pole pieces and a plurality of electrical windings associated with the pole pieces. Each winding includes a cable having an electrically conductive element. A lossy insulative material is located between the electrical windings and the associated pole pieces.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: April 18, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Mark A. Wisnewski, David J. Trzcinski, William T. Ivan, Yue Fan
  • Brushless motor
    Patent number: 9627933
    Abstract: A brushless motor includes a stator comprising a stator core with teeth protruding inwardly and windings wound on the teeth, and a rotor comprising a shaft, a rotor core fixed to the shaft, and a ring magnet fixed to the circumferential outer surface of the rotor core. The ring magnet includes a plurality of magnetic poles radially magnetized so that north poles and south poles are arranged alternately in the circumferential direction, boundary lines between adjacent magnetic poles being skewed by an angle ? relative to an axis of the shaft. A plurality of grooves are formed in a circumferential outer surface of the rotor core. Each groove extends from one axial end to the other axial end of the rotor core, has a circumferential width smaller than each of the magnetic poles, and is covered by the ring magnet with a void formed between the groove and the ring magnet.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: April 18, 2017
    Assignee: Johnson Electric S.A.
    Inventors: Mao Xiong Jiang, Yue Li, Tao Zhang, San Yuan Xiao, Lik Hon Chan