Multiplex Patents (Class 310/205)
  • Patent number: 9209672
    Abstract: An electric motor has a rotatable armature having two pairs of poles, including a lamination stack which has a shape which is symmetrical about its axis and which forms twenty radial teeth and twenty slots and which has, associated therewith, a commutator with twenty segments, and a distributed closed winding, the conductors of which extend into the slots and are connected to the segments of the commutator in a predetermined manner. The winding of the armature has a lap-type winding or coil section connected to two adjacent segments of the commutator and, in series therewith, a plurality of wave-type winding sections or coils. All of these sections or coils encompass a same number of slots.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: December 8, 2015
    Inventors: Gian Carlo Magnetti, Daniele Paolo Dal Colle
  • Patent number: 9118223
    Abstract: A DC electric motor has a stack of laminations defining a rotor with at least two pairs of poles and an even number of slots at least equal to 8. The rotor also has a commutator with an even number of segments and a closed distributed rotor winding. The winding extends in the slots and is connected in a predetermined manner to the segments of the commutator. The rotor winding has a winding section of the lap type, connected to two consecutive segments of the commutator and, in series with this, a plurality of winding sections of the wave type. These winding sections all span an identical number of slots.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: August 25, 2015
    Assignee: Johnson Electric S.A.
    Inventors: Gian Carlo Magnetti, Daniele Paolo Dal Colle
  • Patent number: 8575812
    Abstract: A winding for an n-phase electric motor is disclosed. The inventive winding comprises a number of consecutive winding groups of n individual windings, wherein at any point in time an individual winding of a first group exhibits one direction of current flow and wherein at the same point in time a corresponding individual winding of an adjacent group exhibits the opposite direction of current flow. There is also disclosed a method for preparing such winding. It is further disclosed a magnetic unit adapted for such winding, comprising permanent magnets being essentially triangular in cross-section. Further, there is disclosed electric motors using the inventive winding concept, as well as geodetic instruments taking advantage thereof. An electric motor according to the disclosed inventive concept is particularly well suited for direct drive.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: November 5, 2013
    Assignee: Trimble AB
    Inventors: Magnus Westermark, Mikael Hertzman
  • Patent number: 8368275
    Abstract: A stator for a multi-phase electric motor comprises a plurality of teeth for each phase. The windings on two teeth from one phase are formed from a single length of conductor. The windings on a first one of the teeth being formed at least in part from two sections of the conductor spaced apart along the length of the conductor, and the windings on a second one of the teeth being formed from an intermediate section of the conductor between the spaced apart sections.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: February 5, 2013
    Assignee: TRW Limited
    Inventors: Andrew Lee Court, Jeffrey Ronald Coles
  • Patent number: 8080910
    Abstract: A motor for a compressor includes a rotor and a stator disposed radial outside of the rotor. The stator includes a stator core having oppositely facing axial end faces, insulators disposed so as to face the end faces, and coils wound on the stator core and the insulators. Each of the insulators has an annular part, a plurality of teeth protruding radially inwardly from an inner circumferential surface of the annular part at specified circumferential intervals, an outer circumferential wall having one end fixed to an end face of the annular part, and protrusions disposed on an outer circumferential surface of an outer circumferential wall of an insulator. At least one lead wire of the coils is drawn out to an outer circumferential side of the outer circumferential wall, guided along the outer circumferential wall, and passed on a side of the protrusions facing the stator core.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: December 20, 2011
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Tsukamoto, Hiroki Shirasaka, Hidemi Tanji
  • Patent number: 7960878
    Abstract: The electric rotating machine includes a rotor, a stator having a stator core and a stator winding wound on the stator core, and a cooling liquid feeding function of applying cooling liquid to the coil end of the stator winding. The stator winding constituted by coils wound along the circumferential direction includes crossover portions each of which electrically connects the ends of two of the coils through which currents in the same phase flow, respectively. The crossover portions are arranged so as to overlap one another only partially in the circumferential direction. The cooling liquid feeding function applies the cooling liquid to at least one of the crossover portions.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: June 14, 2011
    Assignee: Denso Corporation
    Inventors: Atsuo Ishizuka, Shigenobu Nakamura
  • Patent number: 7863794
    Abstract: There is provided a 3-phase 2-layer armature winding of a rotating electrical machine. The lead-out connection conductor connected to the output terminal is connected to a coil piece positioned at least farther than a first coil piece inside the phase belt counted from the end of the each phase belt, and a coil piece positioned at the end of the phase belt is connected to a coil piece positioned at least farther than the n-th (n is an integer larger than 1) inside the phase belt counted from the other end of the phase belt in the same parallel circuit, by a jumper wire.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: January 4, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi, Hiroshi Hatano, Takashi Ueda, Ken Nagakura
  • Publication number: 20080044308
    Abstract: A casing with housing space for retaining a first gear and a second gear in a condition where the tooth tips and both side surfaces slide, comprises a main casing which retains the first gear in a manner which allows rotation but restricts movement in the axial direction, and a gear holder which can move in the rotating shaft direction in the main casing and which rotatably retains the second gear. The main casing contains a biasing member which applies a biasing force to bias the gear holder to one side in the rotating shaft direction, and a piston which is acted on by hydraulic pressure and presses the gear holder on the other end side in the rotating shaft direction to counteract the biasing force. The gear holder is acted on by the hydraulic force from the piston to counteract the bias from the biasing member and moves in the rotating shaft direction according to the hydraulic force so that the engagement width between the first gear and the second gear which is retained by the gear holder is changed.
    Type: Application
    Filed: December 18, 2006
    Publication date: February 21, 2008
    Applicant: TBK CO., LTD.
    Inventors: Takeshi Hoji, Satoshi Nagao, Keisuke Shinozaki
  • Patent number: 6057623
    Abstract: A dynamo-electric machine comprises an armature having a winding composed of a wire or wires wound by a lap winding method through slots extending in the axial direction formed on the outer circumferential surface of a core secured to a shaft, a commutator having commutator segments secured to the shaft, and an equalize disposed adjacent to the commutator in the direction of the axis of the commutator having terminals stacked in the axial direction which electrically connect commutator segments which should have the same electric potential.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: May 2, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshinori Tanaka, Ryuichi Ikeda, Kyouhei Yamamoto, Akihiro Daikoku
  • Patent number: 5654602
    Abstract: A three phase four pole synchronous generator winding is shown, having three parallel connected circuits per phase, for a stator with 63 winding slots, each circuit having seven series connected coils, with particular application to very large nuclear or fossil fuel generators and with emphasis on low cost.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: August 5, 1997
    Inventor: David M. Willyoung
  • Patent number: 4857790
    Abstract: A winding pattern for a motor rotor comprising an armature mounted on a rotary shaft and provided with a plurality of longitudinal slots defined a plurality of core teeth; a commutator mounted on the rotary shaft at a longitudinally spaced relationship to the armature and provided with circumferentially divided segments; and one or more sets of coils wound around the core teeth through the core slots. The very first starting lead of the set of coils comprises a first span which extends from a first commutator segment into a first core slot, a second span which extends out of the first core slot and is wrapped around the rotary shaft at a part opposite to the commutator with respect to the armature, a third span which is passed through a second core slot from the second span towards the commutator, a fourth span which extends out of the second core slot and is wrapped around a part of the rotary shaft intermediate between the armature and the commutator over a certain angle.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: August 15, 1989
    Assignee: Mitsuba Electric Mfg. Co., Ltd.
    Inventors: Akira Kamiyama, Nobuhisa Hongo, Toyomi Matsuki, Kenji Kanai
  • Patent number: 4707629
    Abstract: The present invention includes a rotary converter for converting direct current to altenating current. The rotary converter includes a rotor and a stator. The rotor includes a shaft, a commutator concentric with the shaft, and an armature core concentric with the shaft and adjacent the commutator, the core having slots in its outer circumference parallel to the axis of the shaft. At least one slip ring is mounted on the shaft adjacent the armature core. A first or direct current winding is electrically connected to the commutator and wound in a wave pattern through the armature cores slots. A second or alternating current winding is electrically connected to at least one slip ring and wound in a series of alternating clockwise and counterclockwise loops through the armature core slots. The rotary converter is particularly suitable for operation from a standard twelve volt battery to supply alternating current at a desired rating to electric tools and the like.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: November 17, 1987
    Inventor: George J. Wasko
  • Patent number: 4409507
    Abstract: A winding technique for multiphase machines is presented that utilizes a core of Q slots and P poles for M phases where Q/M is an integer but the number of slots per phase per pole Q/M/P is a non-integer expressible as a fraction N/D reduced of common factors and M and D have a common factor of at least two. Fractional-slot, nearly but not quite balanced, windings are provided by providing a distant coil grouping for D poles in which the number of coils in the coil groups for the D poles equals N for an individual phase and the pattern is repeated for the additional poles to provide the total of P pole windings. The near balancing of the windings succeeds in achieving sufficient voltage balancing and low torque harmonics for successful operation and is advantageous for avoiding a need to provide additional core designs.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: October 11, 1983
    Assignee: Westinghouse Electric Corp.
    Inventor: Gurney L. Godwin
  • Patent number: 4360750
    Abstract: A rotor device for use in an electrical machine is disclosed which includes a liquid-cooled single or multi-layer winding whose end turns are electrically interconnected in the rotor end coil through connectors. The connectors form portions of cooling liquid supply or return lines and are connected by insulated pipes to one or more liquid chambers located at the rotor end.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: November 23, 1982
    Assignee: BBC Brown, Boveri & Company, Limited
    Inventor: Herbert Pohl
  • Patent number: 4132914
    Abstract: An arrangement in multiphase electrical machines in which a six-phase winding is provided with reduced maximum voltage between the terminals in the end portion. Three-phase windings are wound in opposite directions such that if one three-phase winding is wound clockwise, then the other three-phase windings is wound counterclockwise. The terminals of the three-phase windings are brought out at different sides of the stator. The winding reduces the highest possible voltage in the phase zone junction.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: January 2, 1979
    Inventors: Garri M. Khutoretsky, Alexandr I. Vorontsov, Larisa A. Drozdova, Boris S. Yanik
  • Patent number: 3999093
    Abstract: A high voltage rotating electric machine having an armature that includes a continuous gradient a-c winding and comprising a high permeability magnetic material subdivided in the circumferential direction into a plurality of segments. Each segment is electrically insulated from every other segment.
    Type: Grant
    Filed: June 21, 1973
    Date of Patent: December 21, 1976
    Assignee: Massachusetts Institute of Technology
    Inventor: James L. Kirtley, Jr.