Patents Examined by Nguyen N Hanh
  • Patent number: 8487501
    Abstract: An object of the invention is to provide an armature of an electric motor that provides a maximum of space for winding without causing an increase of the magnetic resistance and reduction of the coil space factor. The armature of the electric motor includes a stator yoke 5 of a stator core 1 wherein a plurality of the stator cores 1 forms a substantially annular shape; and a film insulator 4 formed corresponding to a tooth 6 and a stator yoke 5 of the tooth 6, shoes 2b and 3b being provided at locations corresponding to both side ends of a front portion of a protrusion 6a of the tooth 6, the film insulator 4 being fittingly fixed to grooves 2c and 3c by its being sandwiched between a connection-side insulator 2 and an opposite-side-of-connection insulator 3, the insulators 2 and 3 having grooves 2c and 3c at roots of the shoes 2b and 3b, respectively, along both side ends 6b of the front portion of the tooth 6.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: July 16, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keiichiro Oka, Hiroyuki Akita, Toshio Arai
  • Patent number: 8487497
    Abstract: In a motor system, a motor includes a rotor and a stator. The rotor includes magnet poles and consequent poles. The stator includes a stator core and a stator coil that is comprised of first and second m-phase coils. The number of slots of the stator core provided per circumferentially-adjacent pair of the magnet and consequent poles is equal to 4m. The phase windings of the first m-phase coil are alternately arranged with those of the second m-phase coil in a circumferential direction of the stator core. An inverter energizes the first and second m-phase coils to cause them to respectively create first and second spatial magnetic fluxes. Variation in a resultant spatial magnetic flux, which is the resultant of the first and second spatial magnetic fluxes, is less than variations in the first and second spatial magnetic fluxes in a circumferential direction of the rotor.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: July 16, 2013
    Assignee: Denso Corporation
    Inventor: Makoto Taniguchi
  • Patent number: 8487503
    Abstract: A hand power tool with an oblong motor housing, particularly used as a handle, houses an electric collector motor. The brushes of the motor are housed in a brush holder with a brush shaft in a spring loaded way. Furthermore, the brush holder is solely/individually fixed in the motor housing, to which an axis intersection is associated, particularly a longitudinal, a vertical, and a transversal axis. According to the invention, the hand power tool is arranged in the motor housing in a space-saving manner with the shaft of the brush holder arranged opposite the vertical axis of the motor housing at an angle of approximately 20° in a laterally displaced way, particularly radially, relative to the longitudinal axis.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: July 16, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Florian Esenwein, Manfred Lutz, Thomas Schomisch
  • Patent number: 8487489
    Abstract: Provided is an apparatus, for example, for use with a rotating electric machine, that includes a housing. The housing can include a housing main portion and a housing end portion. The housing main portion can be configured to be disposed proximal to a body portion of a stator section of an electric machine. The housing main portion can define a main fluid channel that is configured to conduct fluid therethrough. The housing end portion can receive fluid from said main fluid channel and direct fluid into contact with a winding end portion of a conductive winding of the stator section.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: July 16, 2013
    Assignee: General Electric Company
    Inventors: Pepe Palafox, William Dwight Gerstler, Xiaochun Shen, Ayman Mohamed Fawzi El-Refaie, Murtuza Lokhandwalla, Lembit Salasoo
  • Patent number: 8487485
    Abstract: A linear synchronous motor is provided, of which a core unit may readily be manufactured. Accordingly, the manufacturing cost of the linear synchronous motor may be reduced, and the weight of the linear synchronous motor may be lightened. The linear synchronous motor includes a frame member that is formed of a magnetic conductive material and surrounds the periphery of a core unit centering on a shaft. The frame member functions as a yoke that magnetically connects a plurality of magnetic pole portions. The frame member is constituted from a first divided frame member and a second divided frame member fixed to the core unit with screws.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: July 16, 2013
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Yuqi Tang, Satoshi Sugita
  • Patent number: 8482181
    Abstract: A synchronous reluctance motor system is disclosed. The system may generally comprise an input power source that provides alternating phase current and voltage (e.g., AC current). The input power may be further conditioned through a variable voltage conditioner. The system may also include capacitive elements connected in series with the motor windings.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: July 9, 2013
    Assignee: Convergent Power, Inc.
    Inventor: James F. Murray, III
  • Patent number: 8482175
    Abstract: An exemplary permanent-magnet synchronous machine is disclosed with a stator and a rotor located at the distance of the air gap (?1) from the stator. The rotor is supported on the shaft in a rotating arrangement, and a maximum value has been determined for the eccentricity between the stator and the rotor. The value is higher than one-tenth of the air gap. The magnetization of the synchronous machine is arranged with permanent magnets fitted in the rotor for creating a magnetic flux (?) which is closed via the stator, the air gap (?1), and the rotor. A relation H?(10*???)*?r applies between the thickness of the permanent magnet and the maximum value of eccentricity ?, wherein ? is the dimensioning value of the air gap and ?r is the relative permeability of the permanent magnet.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: July 9, 2013
    Assignee: Abb Technology AG
    Inventors: Alpo Hauru, Ari Tammi
  • Patent number: 8476799
    Abstract: Electric motor cluster consisting of several stator sections each possessing a minimum of two salient pole projections, wound with power windings, and each section containing a single rotor. Each individual motor is angularly displaced one from the other, while mounted within a common housing, and geared together such that each motor section contributes to the rotation of a common output shaft. Each motor comprises at least one stator and one rotor section, such that each rotor section is associated with a specific stator section. The lateral axis of each rotor section is disposed at an oblique angle with respect to the axis of the shaft for that particular motor.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: July 2, 2013
    Assignee: Convergent, Power, Inc.
    Inventor: James F. Murray, III
  • Patent number: 8471421
    Abstract: A magnetic motor generator wherein electric power is produced by rotating a one-piece magnetic floating flywheel assembly that rotates in a rolling motion. The flywheel assembly is operated by linear induction motors and is repelled upward by a stationary natural magnet. The floating flywheel assembly magnetic axle rotates inside double magnetic collar bearings, which have repelling stationary magnets to center the axle at speed while moving along a support frame. The floating flywheel assembly will have no physical contact with other components in order to prevent bearing losses at speed. The moving components are also enclosed in a vacuum chamber in order to prevent wind resistance, or windage losses at speed. The floating flywheel assembly rotors rotate inside generator stators in order to generate electric power.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: June 25, 2013
    Inventor: Michael Marion McCulley
  • Patent number: 8471429
    Abstract: A stator assembly includes a stator stack and a plurality of conductors extending from the stator stack. An isolator/assembly ring is located on the stator stack. The isolator/assembly ring includes a plurality of inwardly protruding fingers. A method of assembling the stator assembly includes threading the plurality of conductors through the stator stack such that each of the plurality of fingers on the isolator/assembly ring is located between respective ones of the plurality of conductors.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: June 25, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Edward L. Kaiser, Frederick W. Rhoads, Richard Robertson
  • Patent number: 8461742
    Abstract: A connection ring assembly and connection ring support system for a dynamoelectric machine is provided. The connection ring assembly includes a plurality of connection rings, and a clamp element disposed around a portion of the connection rings. The clamp element provides axial and tangential support to the plurality of connection rings. The connection ring support system includes one or more primary spring bars connected to the connection ring assembly. The primary spring bars permit radial and tangential movement of the connection ring assembly. One or more secondary spring bars are connected to the primary spring bars, and permit axial movement of the connection ring assembly.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: June 11, 2013
    Assignee: General Electric Company
    Inventors: Jayashankar KN, Sanjeev Kumar Jha, Shravan Kumar Bhagavatula, Santhosh Kumar Kompally
  • Patent number: 8456055
    Abstract: A core block has an arm portion, and a yoke portion extending circumferentially at an end of the arm portion. At least the yoke portion is configured such that a plurality of core segments are stacked in multiple levels in an axial or radial direction. Each of the core blocks has engaging portions formed at respective opposite ends of the yoke portion and adapted to connect adjacent core blocks. In a first-level core segment, each of the engaging portions has a protrusion extending circumferentially from a corresponding one of the opposite ends of the yoke portion, and a recess juxtaposed radially to the protrusion and adapted to receive the protrusion of an adjacent core block. In a second-level core segment, each of the engaging portions has the protrusion and the recess provided in positionally reversed relation with those of the first-level core segment with respect to the radial direction.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: June 4, 2013
    Assignee: Mabuchi Motor Co., Ltd.
    Inventor: Nobuo Kinoshita
  • Patent number: 8456050
    Abstract: In the brushless motor, a magnetic recording disk is to be mounted on a hub. A base plate rotatably supports the hub on the upper surface. A laminated core is fixed on the upper surface of the base plate and has a ring portion and a plurality of teeth that extend radially from the ring portion. Coils are wound around the plurality of teeth. A cylindrical magnet is fixed to the hub and is magnetized for driving with a plurality of poles along the circumferential direction and is arranged to radially face the plurality of teeth of the laminated core. A wire of one end of one of the coils is drawn out to the bottom surface of the base plate through a hole arranged on the base plate. The wire is connected to a driving line for supplying a current to the coils at a position other than the position of the hole on the base plate. The hole of the base plate is plugged with a resin.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: June 4, 2013
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Hiroki Yamazaki, Hiroshi Muramatsu
  • Patent number: 8456044
    Abstract: An electric machine includes: a stator having stator windings; a rotor configured to interact electromagnetically with the stator; and a housing configured to house the stator and the rotor. A material matrix is disposed within the housing and in contact with the stator windings. The material matrix defines a plurality of passages configured for the cooling fluid to flow within to remove heat from the stator windings.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: June 4, 2013
    Assignee: Remy Technologies, L.L.C.
    Inventor: Alex Creviston
  • Patent number: 8441162
    Abstract: Disclosed is a stator device adapted to be arranged in an electrical machine, where the electrical machine further comprises a moving device, where the stator device is a multi-phase stator device, where the phases are arranged side-by-side in a direction perpendicular to direction of motion of the moving device, and where each phase comprises a first stator core section having a set of teeth, a second stator core section having a set of teeth, and a coil, and where the teeth are arranged to protrude towards the moving device; and wherein at least two neighboring phases share a stator core section, so that the first stator core section of a first phase and a second stator core section of a second phase is formed as a single unit.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: May 14, 2013
    Assignee: Hoganas AB (Publ)
    Inventors: Glynn James Atkinson, Alan G. Jack, Barrie Mecrow
  • Patent number: 8436502
    Abstract: A housing of an electric motor is fitted with an oil seal having the function of sealing an output shaft (rotary shaft) of the motor. The housing is provided with a hole for motor airtightness testing communicating with an internal space of the motor. A local or annular projection configured to close the hole for motor airtightness testing, thereby maintaining the airtightness of the internal space of the electric motor, is disposed on that surface of the oil seal which faces the housing.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 7, 2013
    Assignee: FANUC Corporation
    Inventor: Makoto Funakubo
  • Patent number: 8436505
    Abstract: Disclosed is a motor in which a commutator (10) is provided with connecting wires which short-circuit equipotential segments; brushes (21) are constituted by a low-speed brush (21a), a high-speed brush (21b), and a common brush (21c) used in common by the low-speed and high-speed brushes, and are juxtaposed along the circumferential direction. The circumferential brush width (W2) of the high-speed brush is set to be smaller than the circumferential brush width (W1) of the low-speed brush. The high-speed brush and the low-speed brush are formed so that simultaneous sliding contact with equipotential segments (15) can be avoided. Additionally, armature cores (8) are provided such that a plurality of teeth (12) is point-symmetrical about a rotary shaft (3) at equal intervals in the circumferential direction, and the teeth and slots (13) are formed so as to exist alternately at intervals of 90 degrees in the circumferential direction.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: May 7, 2013
    Assignee: Mitsuba Corporation
    Inventors: Tatsuyuki Saito, Ryuichi Takakusagi, Toshiyuki Kimura, Yoshichika Kawashima, Kenji Sakata
  • Patent number: 8432082
    Abstract: An armature includes a core-back, insulator members, coils and insulating sheets. The insulating sheets are arranged between the coils adjacent to one another. Each of the insulator members includes a flange-shaped inner wall portion positioned radially inwards of each of the insulating sheets. The inner wall portions of the insulator members adjacent to each other include opposing portions opposed to each other in a radially spaced-apart contactless relationship.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: April 30, 2013
    Assignee: Nidec Corporation
    Inventors: Keisuke Fukunaga, Masato Aono
  • Patent number: 8432074
    Abstract: An electric machine system includes an electric motor and an oil pump disposed within a housing. The oil pump is configured to disperse oil in a pattern about a rotational axis within the electric motor. A method for operating the electric machine system is also disclosed.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: April 30, 2013
    Assignee: Remy Technologies, L.L.C.
    Inventor: Alex Creviston
  • 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