Patents Examined by Quyen Leung
  • Patent number: 10020098
    Abstract: In a production method for permanent magnet, a magnetic powder is loaded into a cavity formed in a groove shape whose longitudinal direction horizontally extends. A loading step of loading the magnetic powder includes a first loading step of loading, of the magnetic powder, a first magnetic powder containing no heavy rare earth element or containing a heavy rare earth element, and a second loading step of loading, of the magnetic powder, a second magnetic powder having a higher content rate of heavy rare earth element than that of the first magnetic powder, at a predetermined position in the cavity.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: July 10, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kimiyasu Furusawa, Yoshikazu Ugai, Hiroyuki Akita
  • Patent number: 9997969
    Abstract: An embedded magnet motor includes a stator core, a plurality of permanent magnets each having a rectangular cross section, and a rotor core. The stator core and the rotor core define a first air gap being positioned at an intermediate portion of the rotor core, a second air gap being positioned at a first portion corresponding to a first axis of the rotor core, and a third air gap being positioned at a second portion corresponding to a second axis of the rotor core. Because a diameter of the intermediate portion being positioned between the first portion and the second portion of the rotor core is set smaller than a diameter of the first portion and than a diameter of the second portion, the first air gap is set greater than the second air gap and than the third air gap.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 12, 2018
    Assignee: AISIN SIEKI KABUSHIKI KAISHA
    Inventors: Takanori Tsuzuki, Daisuke Miyata
  • Patent number: 9991822
    Abstract: The invention proposes a MEMS component having a crystalline base body (GK), a recess (AN) and a structured assembly (A) which closes said recess, in which an opening (OG) is structured in a first functional layer (MN), the effective opening cross section thereof varying as a function of the pressure difference on the two sides of the first functional layer (MN).
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: June 5, 2018
    Assignee: TDK Corporation
    Inventor: Pirmin Hermann Otto Rombach
  • Patent number: 9973049
    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 plurality of first core portions each including a plurality of laminations stacked contiguously on the shaft, and a second core portion coupled between each of the first core portions. The first core portions and the second core portion cooperating to define a rotor magnetic core. A plurality of windings is coupled to the rotor magnetic core, and an air flow path is partially defined by the first core portions, the second core portion, and the shaft. 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 core portion.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: May 15, 2018
    Assignee: TECHTRONIC INDUSTRIES CO. LTD.
    Inventors: Yi Jia Chang, Rafael Maynez
  • Patent number: 9966819
    Abstract: The invention relates to an electric machine (10) which is embodied as an alternator, comprising a rotor (20) and an axis of rotation (183), a stator iron (17) which maintains a stator winding (18). Said stator winding (18) comprises phase terminals of winding wires (204), a rectifier circuit (151) which comprises at least one bridge circuit consisting of a positive diode (99) and a negative diode (58). Said positive diode (99) and the negative diode (58) are connected in an electrically conductive manner to the phase terminal of winding wires (204) by means of a metal connecting element (133, 146) which has two half arms (215). One half arm (215) is connected in an electrically conductive manner to a positive diode (99) by means of a connecting section (216) and another half arm (215) is connected in an electrically conductive manner to the negative diode (58) by means of another connecting section.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: May 8, 2018
    Assignee: SEG Automotive Germany GmbH
    Inventors: Ruediger Schroth, Klaus Herbold, Gianna Rivera-Schlottbohm, Vassilios Sekertzis
  • Patent number: 9960341
    Abstract: A high frequency magnetostrictive transducer includes a magnetostrictive rod or wire inserted co-axially into a driving coil, wherein the driving coil includes a coil arrangement with a plurality of small coil segments along the magnetostrictive rod or wire; wherein frequency operation of the high frequency magnetostrictive transducer is controlled by a length of the small coil segments and a material type of the magnetostrictive rod or wire. This design of the high frequency magnetostrictive transducer retains the beneficial aspects of the magnetostrictive design, while reducing its primary drawback, lower frequency operation.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: May 1, 2018
    Assignee: U.S. Department of Energy
    Inventors: Joshua Earl Daw, Steven Cheney Taylor, Joy Lynn Rempe
  • Patent number: 9935512
    Abstract: In a permanent magnet rotating electrical machine including a stator, a rotor obtained by stacking a plurality of rotor cores arranged with magnet insertion holes in layers with gaps, and permanent magnets inserted to the magnet insertion holes, the magnet insertion holes are formed on both sides of the duct piece so as to depart from the duct piece disposed between the rotor cores as the magnet insertion holes extend from the side of the center of the rotor core to the outer circumference side, the magnet insertion holes are disposed so as to shift from the duct piece in the circumferential direction of the rotor, and inner circumference side voids having the length in the circumferential direction wider than the thickness in the circumferential direction of the permanent magnets are provided from the inner circumference side ends of the permanent magnets toward the duct piece.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: April 3, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Mamoru Kimura, Masahiro Hori, Tetsuo Fujigaki, Youichi Matsumoto, Motonobu Iiduka
  • Patent number: 9935525
    Abstract: An electric motor to be easily assembled while taking the advantages of a retrofitted electric motor, excellent maintenance performance and no fear of damage in a temperature sensitive device due to resin injection pressure. The electric motor includes an electric motor shaft, a rotor, a stator, a housing, a sealing body formed of sealant to cover a coil end of the stator, a temperature sensitive device, an end cover, and a resilient retaining member. The electric motor shaft passes through the end cover. The sealing body includes a temperature-sensitive-device support surface opposed to the end cover. The temperature sensitive device is retained between the end cover and the temperature-sensitive-device support surface while the retaining member is interposed between the temperature sensitive device and the end cover.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: April 3, 2018
    Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Kazushige Koiwai, Seiji Saiki
  • Patent number: 9929619
    Abstract: An end cap assembly for an electric motor has an end cap body and at least two motor terminals. The end cap body has at least two holding structures for respectively holding the at least two motor terminals, each holding structure having at least one holder and a through slot. Each motor terminal has a base portion, a terminal portion and at least one mounting portion. The at least one mounting portion is mounted to the at least one holder of a corresponding holding structure. The terminal portion is inserted in the through slot to electrically connect to a male terminal of an external power supply plug. The terminal portion and the at least one mounting portion integrally extend from the base portion.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: March 27, 2018
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Chi Keung Chan, Wu Chuan Liu
  • Patent number: 9929609
    Abstract: The present invention relates to a stator for a motor including: a stator core having a circular base along which a plurality of first holes is formed vertically and a plurality of teeth formed radially around the outer peripheral surface of the base; and an insulating layer coated on the entire surface of the stator core except the inner peripheral surface of the base and the plurality of first holes of the base.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: March 27, 2018
    Assignee: NEW MOTECH CO., LTD.
    Inventors: Jeong Cheol Jang, Wang gyu Jeong, Ji Min Lee
  • Patent number: 9923430
    Abstract: The proposed actuator of engraving machine relates to decorative machining of hard materials, and can be used in arrangement of facades and monuments. A permanent magnet and a core with a pivot are concentrically fixed in an upper part of a housing. An electric coil is placed on a cylindrical frame of nonmagnetic material and can move in the axial direction in a ring gap between the core and the permanent magnet together with a pusher fixed in two circular elastic membranes, spaced in the axial direction and fixed in the housing along an external contour. A shank is fixed on the pusher under the membranes, having a central part extending through a bottom cover of the housing. It has a hollow axial opening, wherein a removable impact tool is mounted. The design is simple and reliable. Durability, accuracy and speed of engraving of the actuator are improved.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: March 20, 2018
    Assignee: NPF Radian Limited Liability Company
    Inventor: Igor Oleksandrovych Ulyanov
  • Patent number: 9915156
    Abstract: An annular stator assembly includes a plurality of stator segments. Each stator segment includes a plurality of laminates having magnetic permeable properties; a plurality of thermally conductive laminates positioned between the permeable laminates; and a cooling pipe extending through the laminates for transferring heat from the laminates to coolant flowing through the cooling pipe. The stator segments are constructed independently. Coils are wound on each segment. The stator segments with the wound coils are subsequently arranged to form the annular stator assembly.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: March 13, 2018
    Assignee: Moog Inc.
    Inventors: Franklin B. Jones, Stuart A. Jones, Andrew I. Nehring
  • Patent number: 9917491
    Abstract: An enclosure for a ground ring includes an enclosure housing configured to accept a ground ring and hold the ground ring in a predetermined position around a shaft that is electrically connected to a drive shaft of an electric motor. The ground ring having a first opening for the drive shaft and the enclosure housing has a second opening for the drive shaft. The enclosure includes an attachment configured to hold the enclosure housing around the shaft to dissipate an electrical charge and to form a cavity that contains the ground ring and includes a predetermined gap between a perimeter of the second opening of the enclosure and a surface of the drive shaft.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: March 13, 2018
    Assignee: Nidec Motor Corporation
    Inventors: Joel W. Northwall, Kenneth R. Theis, Timothy J. Druhe, David M. Lyle
  • Patent number: 9906089
    Abstract: Provided is a rotating electric machine capable of suppressing an increase in temperature of an output terminal (26) to suppress a temperature rise of an internal device, and preventing lowering of a force for fastening the output terminal and a terminal portion of an external device. The rotating electric machine for a vehicle includes a rectifier provided inside a casing, and a terminal device projecting outward through an opening portion of the casing to connect the internal device and the external device. The terminal device includes the output terminal (26) projecting outward through the opening portion to be connected to the terminal portion of the external device by fastening, and a resin body (37) having electrical insulating property and high thermal conductivity, for integrally covering the output terminal (26) except at least for a portion to be connected to a harness-side terminal (35).
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: February 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Motokazu Kuroda, Masaki Hinoue
  • Patent number: 9899888
    Abstract: A coil structure for a rotary electric machine includes phase coils for magnetic flux generation. Each of the phase coils includes a plurality of first element conductors, a plurality of second element conductors, a plurality of first crossover portions, and a plurality of second crossover portions. The plurality of second element conductors are provided in a plurality of second slots among slots. The second slots are provided in a circumferential direction of a stator at a pitch of a first predetermined interval. The second slots are shifted in phase by a second predetermined interval with respect to first slots in the circumferential direction of the stator. The first predetermined interval is set to be an interval equivalent to N times a unit pitch. The second predetermined interval is set to be an interval smaller than the first predetermined interval.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: February 20, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takumi Shibata, Yoshihisa Matsuoka
  • Patent number: 9896794
    Abstract: A driving apparatus for a direct-drive type washing machine includes a support member that is fixed to the lower side of a washing tub; a dehydrating tub rotating shaft that is rotatably supported on the support member and that is connected to a dehydrating tub to rotate the dehydrating tub; a pulsator rotating shaft that is rotatably arranged in the inside of the dehydrating tub rotating shaft and that is connected to a pulsator to rotate the pulsator; a drive motor comprising a double rotor including an outer rotor that is connected to the pulsator rotating shaft and an inner rotor that is connected to the dehydrating tub rotating shaft, and a double stator including a first stator coil for rotating the outer rotor and a second stator coil for rotating the inner rotor; and a motor drive unit that generates alternating-current (AC) power according to a washing control signal.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: February 20, 2018
    Assignee: AMOTECH CO., LTD.
    Inventor: Byung Soo Kim
  • Patent number: 9847692
    Abstract: A coupling portion is provided on either a rotary shaft or a worm shaft in an integrally rotational manner, said coupling portion for connecting the rotary shaft to the worm shaft and having a coupling hole therein. The coupling projection provided on the other of the rotary shaft and the worm shaft is inserted in the coupling hole. A circumferential clearance and a radial clearance are formed between the inner surface of the coupling hole and the coupling projection. Circumferential buffer portions are interposed in the circumferential clearance, and radial buffer portions are interposed in the radial clearance. The inner surface of the coupling hole and the coupling projection are arranged such that the circumferential buffer portions are compressed to deform in the circumferential direction whereby to allow the buffer portions to be brought into contact with each other when the rotary shaft is rotating.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: December 19, 2017
    Assignee: ASMO CO., LTD.
    Inventor: Tetsuya Honda
  • Patent number: 9847685
    Abstract: A coil that is wound around a core having a plurality of slots arranged so as to be distributed in a circumferential direction of a cylindrical core reference plane, and that has N (where N is an integer of 2 or more) star connections. Each of the N star connections includes three phase coil portions corresponding to respective three phases, and first ends of the three phase coil portions are connected together at a neutral point that is formed independently for each of the star connections, second ends of the N phase coil portions of the same phase which are included in the different star connections are connected to each other, a phase coil placement region where the phase coil portion is placed is designed to be continuous in the circumferential direction.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: December 19, 2017
    Assignee: AISIN AW CO., LTD.
    Inventor: Yoshinari Nakagawa
  • Patent number: 9843232
    Abstract: A rotary electric machine includes a three-phase coil including a first phase coil, a second phase coil, and a third phase coil for magnetic flux generation. A bridge conductor connecting an ath end and a bth end of the first phase coil, and a bridge conductor connecting the ath end and the bth end of the third phase coil are provided in a protruding shape on one side of a stator in a radial direction when viewed in a axial direction of the stator. A bridge conductor connecting the ath end and the bth end of the second phase coil is provided in a protruding shape on the other side of the stator in the radial direction when viewed in the axial direction of the stator. The bridge conductor of each coil in the three-phase coil is arranged at the same height position in the axial direction.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: December 12, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takumi Shibata, Yoshihisa Matsuoka
  • Patent number: 9831747
    Abstract: A motor-driven compressor includes a metal housing accommodating a compression unit and an electric motor and a cover coupled to the housing. The cover and the housing define an accommodation chamber that accommodates a motor driving circuit that drives the electric motor. The cover includes a metal shield that blocks electromagnetic noise, a resin outer insulator that is fixed to an outer side of the shield and includes an outer circumferential portion, and a resin inner insulator that is fixed to an inner side of the shield and includes an outer circumferential portion. The shield, the outer insulator, and the inner insulator are separate from one another and stacked together. The shield is held between the outer insulator and the inner insulator. The outer circumferential portion of the outer insulator is joined to the outer circumferential portion of the inner insulator.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: November 28, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke Kinoshita, Ken Suitou, Tatsushi Mori, Kazuhiro Kuroki, Tatsuya Koide, Junya Yano, Takuro Mizuno