Patents Examined by Nguyen N Hanh
  • Hydrostatic bearing made of magnetic material which is also used as a motor magnet
    Patent number: 8427021
    Abstract: A permanent magnet motor is provided with a housing, a rotating shaft supported within the housing, and magnetic coils arranged within the housing. A hydrostatic bearing is disposed on the rotating shaft, the hydrostatic bearing having a permanent magnet incorporated therewith that restricts movement of the rotating shaft in a radial direction.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: April 23, 2013
    Inventor: Andrew J. Devitt
  • Thermomagnetic generator
    Patent number: 8427030
    Abstract: A thermomagnetic generator which converts thermal energy to electrical energy without intermediate conversion to mechanical work and which works at temperatures in the range from ?20° C. to 200° C. comprises a thermomagnetic material selected from, for example, (1) compounds of the general formula (I) (AyBy?1)2+?CwDxEz??(I) where A is Mn or Co, B is Fe, Cr or Ni, C, D and E at least two of C, D and E are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, where at least one of C, D and E is Ge or Si, ? is a number in the range from ?0.1 to 0.1, w, x, y, z are numbers in the range from 0 to 1, where w+x+z=1.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: April 23, 2013
    Assignee: BASF SE
    Inventors: Georg Degen, Bennie Reesink, Ekkehard Brueck
  • Stator for electric rotating machine with enhanced cooling ability
    Patent number: 8421295
    Abstract: A stator for an electric rotating machine is provided which is equipped with a stator coil. The stator coil has a plurality of in-slot portions arrayed within each of slots formed in a stator core in a radial direction of the stator core. Adjacent two of the in-slot portions disposed in each of the slots have radially-facing surfaces which extend in non-parallel to one another at least one of ends of the in-slot portions. The non-parallel orientation of the radially-facing surfaces avoids close contact between entire areas thereof when the in-slot portions move undesirably within the slot in the radial direction of the stator core. In other words, a gap is kept between the radially-facing surfaces and serves as a radiator to dissipate heat, as generated in the in-slot portions.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: April 16, 2013
    Assignee: Denso Corporation
    Inventors: Nobuhiro Asano, Atsuo Ishizuka
  • Rotor of rotating electrical machine
    Patent number: 8421318
    Abstract: A rotating electrical machine is provided in which, even when torque from a water turbine is reduced and reverse torque is applied due to load cut off, a rotor core is not eccentric to spider arms. The rotor of a rotating machine includes a vertical rotating shaft, spider arms extending radially from the vertical rotating shaft, and a rotor core component provided to the outer circumference of the spider arms. A T key and cotters are inserted into and secured to a key way provided to an abutment surface of the inner circumference of the rotor core component and the top end of the spider arm. A plate spring is mounted to a surface of the spider arm, the surface facing a rotational direction for electrical generation. The plate spring has one side engaging the spider arm, the other side engaging the rotor core component, and a middle portion bolted from an opposite surface of the spider arm.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: April 16, 2013
    Assignee: Hitachi Mitsubishi Hydro Corporation
    Inventors: Takeshi Kuwahara, Yukiyoshi Yanagisawa, Koshu Hagiya, Masayuki Okada, Yosuke Omori, Shigeki Akanuma
  • Assembly of driving device for brushless motor of air-conditioner
    Patent number: 8421290
    Abstract: The present invention relates to an improved assembly of driving device for brushless motor of air-conditioner, which is a design providing a unitary and simple assembly of driving device of brushless motor, including a brushless motor body and a support rack. The support rack is made in the form of a U-shape having opposite ends forming end plates that extend high upwards. Besides providing a recess for positioning, assembling, and fixing the motor body, the U-shaped support rack forms a space that exactly accommodates the driving device therein, whereby the structure of the motor is reduced in volume and the purposes of use of simplified structure and practical convenience are realized.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: April 16, 2013
    Assignee: Headline Electric Co., Ltd.
    Inventors: Chin-Hui Lin, Jin Lee
  • Universal motor
    Patent number: 8415850
    Abstract: A universal motor includes a stator and a rotor rotatable relative to the stator. The stator includes a stator core and winding wound on the stator core. The stator core has an E-shape cross section and comprises a main part and three extension parts extending perpendicularly from the main part. Each extension part has an arc surface. The arc surfaces of the extension parts cooperatively form a space into which the rotor is received.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: April 9, 2013
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Jian Zhao, Yong Li, Yu Li Yang
  • Induction machine bearing system
    Patent number: 8415847
    Abstract: A bearing assembly for an induction machine, such as an alternating current motor, includes a magnetic bearing for supporting a rotating shaft. An auxiliary bearing, also supporting the shaft in the event of magnetic bearing failure, is aligned with the motor end shield and frame so that shaft loads supported thereby are transferred to the frame in a manner that reduces likelihood of magnetic bearing contact with the shaft or its deformation. The bearing assembly may incorporate shock absorbing and vibration damping/isolation elements, such as o-rings, between the auxiliary bearing and its support structure interface to the frame. The auxiliary bearing may be incorporated in a removable cartridge for ease of machine maintenance. The bearing assembly may include heat dissipating fins.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: April 9, 2013
    Assignee: Siemens Industry, Inc.
    Inventors: Sumit Singhal, T. J. Stengel
  • Rotor for electric rotating machine
    Patent number: 8415856
    Abstract: A rotor for an electric rotating machine includes a rotor core and a plurality of magnetic poles. The rotor core is formed of a plurality of magnetic steel sheets laminated in the axial direction of the rotor core. The magnetic poles are formed on a radially outer periphery of the rotor core. The magnetic poles are arranged at predetermined intervals in the circumferential direction of the rotor core so that the polarities of the magnetic poles alternate between north and south in the circumferential direction. Furthermore, the magnetic steel sheets forming the rotor core are welded so that a plurality of welds are formed on one of radially outer and inner surfaces of the rotor core. Each of the welds has a pair of axial end portions that are offset from each other in the circumferential direction of the rotor core and electrically connected to each other.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: April 9, 2013
    Assignee: Denso Corporation
    Inventors: Ryosuke Utaka, Tomokazu Hisada
  • Hydrodynamic bearing assembly and motor including the same
    Patent number: 8410650
    Abstract: A hydrodynamic bearing assembly includes a sleeve rotatably supporting a shaft, a thrust plate housing portion extending to an upper side of the sleeve in an axial direction so as to house a thrust plate, and a stopper ring housing portion stepped in an upper side of the thrust plate housing portion in the axial direction and housing a stopper ring for fixing the thrust plate. The stopper ring protrudes from the stopper ring housing portion such that an outer circumferential surface of the stopper ring has a larger height than an inner circumferential surface of the stopper ring housing portion.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: April 2, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Ho Kyung Jang, Il Oung Park, Jong Rycol Oh
  • Production method of vibrating motor and rotor for vibrating motor
    Patent number: 8405266
    Abstract: A vibrating motor has a shaft, a stator including a yoke having pole teeth extending toward an axis of the shaft from an inner circumference and coils wound around the pole teeth, a rotor including an eccentric weight formed on a radially outer surface of the shaft, and a permanent magnet integrally formed with the eccentric weight, and a bearing device rotatably supporting the rotor maintaining clearance between the inner circumference of the pole teeth and the rotor. The rotor has a structure in which the shaft, the eccentric weight, and the permanent magnet are integrally formed with each other by a thermoplastic magnetic material composing the permanent magnet.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: March 26, 2013
    Assignee: Minebea Co., Ltd.
    Inventors: Manabu Nakamura, Yuzuru Suzuki, Hiroyuki Furusaki
  • Transverse and/or commutated flux systems having segmented stator laminations
    Patent number: 8405275
    Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of laminated materials, for example laminated materials configured with cuts and/or segmentations. Segmentations may also assist with manufacturability, mechanical retention of components, and the like.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: March 26, 2013
    Assignee: Electric Torque Machines, Inc.
    Inventors: David G. Calley, Daniel S. Cole, John M. Dyer, Thomas F. Janecek, Tyler K. Williams
  • Permanent magnetic device
    Patent number: 8405267
    Abstract: An apparatus to operate with a rotor includes a plurality of permanent magnetic components and a plurality of hydraulic cylinders. The permanent magnetic components are arranged to surround the rotor. The hydraulic cylinders are coupled to permanent magnetic components and are connected via at least one hydraulic tube.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: March 26, 2013
    Inventor: Chun Shig Sohn
  • Motor and electronic apparatus using the same
    Patent number: 8405276
    Abstract: The motor comprises a stator, a rotor, and magnets. The stator has a plurality of magnetic poles circumferentially arranged at first spaced intervals. The rotor is rotatably arranged in a position opposing to the stator. The magnets are arranged at second spaced intervals circumferentially on a surface of the rotor. The stator is formed by laminating plate materials, and a plurality of laminated plate materials at least including outermost layers of a laminated body thereof are bent in a direction substantially parallel to the magnet in order to form extended portions. And, when a magnet opposed area of pole tip portion being closest to a magnet including the extended portion is S, and a sectional area of magnetic pole is A, then area ratio (S/A) fulfills the relation of 4.8>(S/A).
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: March 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroaki Kawasaki, Yuichi Yoshikawa, Atsuyoshi Koshiba, Yasuhiro Inoue, Koji Kadowaki, Yasuo Kunishige
  • Brushless rotary electric machine
    Patent number: 8400028
    Abstract: Provided is a brushless AC generator for a vehicle, with improved cooling performance for an exiting core and an exciting coil. In the brushless AC generator for the vehicle, a rotor includes: magnetic-pole cores fixed to a shaft; a cylindrical exciting core fixed to a rear bracket, the exciting core being inserted into one of the magnetic-pole cores; and an exciting coil formed by winding a conductor around a minor-diameter portion of the exciting core. The rear bracket includes: vent holes for the rotor, through which cooling air generated by rotation of a cooling fin passes, the vent holes for the rotor being formed around a bearing housing portion for housing a rear bearing therein; and a guiding portion including an air duct for guiding the cooling air, which has passed through the vent holes for the rotor, to the exciting core.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: March 19, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hideyuki Hayashi
  • Stator for electric motor
    Patent number: 8400043
    Abstract: The invention relates to a stator with a plurality of field coils, wherein the yoke teeth, which bear the field coils, of the poles are connected with their free ends to a stator ring, and wherein adjacent pole shoes or poles are connected to one another.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: March 19, 2013
    Assignee: CPM Compact Power Motors GmbH
    Inventors: Thomas Leiber, Valentin Unterfrauner, Nico Windecker
  • Coolant channels for electric machine stator
    Patent number: 8395287
    Abstract: Embodiments of the invention provide an electric machine module including an electric machine. The electric machine includes a stator assembly with a plurality of stator laminations. The plurality of stator laminations include a plurality of different outer diameters and some of the plurality of stator laminations include at least two different radii. At least one circumferential coolant channel and at least one axial coolant channel can be defined by the plurality of stator laminations. The at least one circumferential coolant channel can be defined substantially around a circumference of the stator assembly and the at least one axial coolant channel can be defined substantially along an axial length of the stator assembly.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: March 12, 2013
    Assignee: Remy Technologies, LLC
    Inventor: Michael D. Bradfield
  • Linear vibrator
    Patent number: 8395286
    Abstract: The linear vibrator includes a base forming a hollow space, a suspension fixed on the base, and an oscillating portion suspended in the hollow space by the suspension. The suspension defines a flat part, a connecting portion bent downward from the flat part, and a spring portion extended horizontally in a direction parallel to flat part from the end of the connecting portion. The suspension is directly connected with the outside component, thereby transmitting the vibration to the outside component rapidly.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: March 12, 2013
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components Inc.
    Inventors: Hong-Fu Xu, Le-Ping Dong, Wei Zhang
  • Method of fabrication of permanent magnet machines with magnetic flux regulation
    Patent number: 8390164
    Abstract: A method of forming a flux regulated machine includes winding stator windings into slots in an outer core. The outer core is formed to have a plurality of radially inwardly extending tooth pieces that are circumferentially spaced, and which define the slots. Further, control coils are wound around an inner core. Then, the inner core is inserted within the outer core such that the tooth pieces contact the inner core, and such that the control coils close off the slots at a radially innermost position. A flux regulated permanent magnet machine generally made according to this method is also disclosed.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: March 5, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Jacek F. Gieras, Gregory I. Rozman, Shin Katsumata
  • Compact electromechanical actuator
    Patent number: 8390160
    Abstract: An electromechanical actuator for controlling the position of an aircraft component has a linear actuator to be driven to position a component. A transverse flux motor drives the linear actuator to move in a linear direction and control the position of the component.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: March 5, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Jacek F. Gieras, Gregory I. Rozman
  • Segmented core motor stator
    Patent number: 8390166
    Abstract: Stator core of motor stator is equipped with a segmented core connecting body which connects in an annular shape a segmented core having a structure whereby laminated core plates are connected and held in place in a laminated state. To connect and fix core laminated plates by clamping, first and second dowels formed in each core laminated plate are used to connect and fix common rings by pressure-fitting them to the first and second end faces at either side of the segmented core connecting body, thus integrating the segmented core connecting body. The segmented core connecting body can be integrated with a simple operation, thus significantly reducing the assembly time for the stator core.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: March 5, 2013
    Assignee: Harmonic Drive Systems Inc.
    Inventor: Kiyoto Kobayashi