Squirrel Cage Patents (Class 310/211)
  • Patent number: 10367393
    Abstract: A motor rotator includes: a rotor shaft configured to be journaled to a pair of bearing members of a motor device; and a rotor stack that includes a plurality of lamination plates and a plurality of small-diameter plates having an outer diameter smaller than an outer diameter of the lamination plates, the lamination plates and the small-diameter plates being stacked in an axial direction of the rotor shaft and integrated. The plurality of small-diameter plates forms a pair of bosses, the pair of bosses projecting from both sides of the plurality of lamination plates along the axial direction of the rotor shaft to abut on the pair of bearing members.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: July 30, 2019
    Assignee: SANYO DENKI CO., LTD.
    Inventors: Kouji Nakatake, Masaaki Ohashi
  • Patent number: 10361612
    Abstract: The invention relates to a short-circuiting ring for an electric machine, comprising a single-piece serpentine ring member (7) made of a single-piece strip material. The invention also relates to a rotor for an electric machine.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 23, 2019
    Assignee: Robert Bosch GmbH
    Inventor: Markus Heidrich
  • Patent number: 10348145
    Abstract: A rotor is connected to a shaft member and rotates about a central axis. The rotor includes a shaft hole having at least part of the shaft member disposed therein; and flow paths disposed around the shaft member and penetrating the rotor in a direction parallel with the central axis. Each flow path has a first surface facing outward in the radial direction; a second surface disposed outward of the first surface in the radial direction and facing the first surface; a third surface connecting the first and second surfaces at one end in a rotational direction about the central axis; a fourth surface connecting the first and second surfaces at the other end in the rotational direction. The condition C<D is satisfied, where C is the distance between both ends of the first surface, and D is the distance between both ends of the second surface.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: July 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yabe, Kazuhiko Baba, Takahiro Tsutsumi
  • Patent number: 10243435
    Abstract: A rotor for a high-speed, high-power electric motor includes, according to the rotor axis, a magnetic mass surrounded on both sides by short-circuit rings, and crossed at several notches by electrical conductors connecting the short-circuit rings to form a squirrel cage. Each electrical conductor is formed of a single bar having a trapezoidal section over its entire length.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: March 26, 2019
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventors: Antoine Billaud, Thibaut Mauffrey
  • Patent number: 10213756
    Abstract: A blending appliance includes a housing with a jar receiving area defined between an upper housing and a support base. A blender jar includes a base portion and a receptacle portion, and is configured to be laterally received within the jar receiving area of the housing. A magnetic coupling system includes an upper magnetic coupler disposed in the base portion of the blender jar and a lower magnetic coupler disposed in the support base of the housing. The upper and lower magnetic couplers are magnetically coupled to one another for driving a blade assembly disposed in the receptacle portion of the blender jar. A brake mechanism is disposed on the upper magnetic coupler and is configured to stop rotation of the upper magnetic coupler when the blender jar is removed from the jar receiving area.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: February 26, 2019
    Assignee: Whirlpool Corporation
    Inventors: Bernard J. Brotzki, Michael P. Conti, Steven C. Drees, Edward Haney, Paul S. Paget, Mitchell L. Robertson, Timothy Patrick Vanantwerp, Jeremy T. Wolters
  • Patent number: 10199894
    Abstract: A rotor of an electric motor including a rotor core, two conductive end plates, a plurality of conductors and a casting metal is provided. The rotor core has a central hole and a plurality of slots surrounding the central hole at a predetermined interval. The two conductive end plates, disposed at two ends of the rotor core, have a plurality of fixing structures, respectively. A plurality of cavities is disposed between two neighboring fixing structures and the shape and the positions of the cavities correspond to that of the slots. The conductors are shaped as long bars and penetrate the slots. Two ends of the conductors are fixed by the fixing structures. The casting metal is injected into the cavities and the slots, and further covers the peripheral of the conductors and the fixing structures, two ends of the rotor core and outside of the two conductive end plates.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 5, 2019
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: I-Wei Lan, Yu-Hsun Wu, Yee-Pien Yang
  • Patent number: 10186936
    Abstract: The disclosure relates to an electric machine having a stator, a rotor and an inverter arranged in an inverter housing. The rotor is rotatably mounted about a rotational axis with its rotor axis in a first end shield and in a second end shield. The second end shield is arranged in or on the inverter housing. At least one suction opening and at least one blowing opening are arranged on the radial periphery of the second end shield. At least two cooling fins are provided on the second end shield, a baffle is arranged between the cooling fins of the second end shield and the stator and the rotor which is arranged in the stator, such that a cooling medium flowing radially through the at least one suction opening is guided to the at least one blowing opening.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: January 22, 2019
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Holger Fröhlich, David Charles, Robert Krause, Arnoud Smit
  • Patent number: 10135309
    Abstract: A rotor having a number of tangentially magnetized permanent magnets tangentially evenly distributed and arranged both in the center region and in the outer regions in the axial direction is disclosed. Flux-guiding elements between the permanent magnets guide the magnetic fields of the permanent magnets radially toward the center region of the stator. The flux-guiding elements comprise a plurality of sheets stacked on one another in the axial direction. The sheets in the outer regions are smaller than the sheets in the center region. The sheets arranged in the outer regions are surrounded on their radially outside end by a retaining apparatus. Form-fitting elements transmit centrifugal forces acting on the sheets arranged in the center region are transmitted to the sheets arranged in the outer regions.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: November 20, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Daniel Mader, Rolf Vollmer
  • Patent number: 10069360
    Abstract: An electric rotary machine includes a stator, which Is fixed to a housing, composed of a stator core having a coil end protruding at an end face of the stator core, a rotor core formed by laminating core sheets, and a rotor having a pair of rotor side-plates sandwiching both end faces of the rotor core. The rotor core is rotatably supported in the housing facing an inner peripheral surface of the stator with a gap between the rotor core and the stator. Either one or both of the rotor side-plates has a concave surface in an outer surface of the side-plate that does not abut the rotor core. An axial distance from the end face of the rotor core to the concave surface increases from an inner diameter side to an outer diameter side.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: September 4, 2018
    Assignee: DENSO CORPORATION
    Inventors: Takeo Maekawa, Keiji Kondou, Masayoshi Yamamoto, Takashi Sato, Tomoyuki Shinkai
  • Patent number: 10047746
    Abstract: A refrigerant compressor (100) includes: a sealed vessel (103); a compression mechanism (101) that sucks refrigerant, sucked in the sealed vessel (103), for compression; a motor (102) that drives the compression mechanism (101); a suction pipe (104) for sucking the refrigerant into the sealed vessel (103) when sucking the refrigerant; a cover (117a) arranged to face an outlet of the suction pipe (104), to force the refrigerant sucked through the suction pipe (104) to collide against the cover for gas-liquid separation, and to allow liquid refrigerant from the separation to drop on a coil (126) of the motor (102); and a suction passage (118) that introduces gas refrigerant from the gas-liquid separation, for which the refrigerant sucked through the suction pipe is forced to collide against the cover (117a), to an inlet of the compression chamber provided in the compression mechanism (101).
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: August 14, 2018
    Assignee: Hitachi-Johnston Controls Air Conditioning, Inc.
    Inventors: Masaki Koyama, Keiji Sasao
  • Patent number: 10038359
    Abstract: A rotor casting includes a lamination stack and a cast structure including proximal and distal cast end rings respectively adjacent proximal and distal end faces of the lamination stack. Cast axial ribs are distributed radially on a peripheral surface of the lamination stack and extend between the proximal and distal cast end rings. Cast feed members extend axially from the proximal cast end ring and are respectively positioned radially between an adjacent pair of axial ribs. In one example, cast bar segments integral to the proximal and distal cast end rings are formed in axial slots of the lamination stack. In one example, a bar insert in each axial slot has insert ends that extend respectively from the proximal and distal end faces of the lamination stack and are fully encapsulated respectively in the proximal and distal cast end rings. A method of forming the rotor casting is provided.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: July 31, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael D. Hanna, John S. Agapiou
  • Patent number: 10027211
    Abstract: A cage rotor of a rotary asynchronous machine includes an axially laminated core having substantially axially extending grooves, at least one electrical conductor disposed in the grooves and composed of at least of two partial conductors constructed from materials having different electrical conductivities and different mechanical strengths, wherein the partial conductor made of the higher-strength material is disposed radially farther outwardly at least in sections of the groove, as viewed along the axial extent of the respective, and a short-circuit ring arranged on a respective end face side of the laminated core and electrically-conductively interconnecting the electrical conductors that are disposed in the respective grooves and protrude axially from the laminated core.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 17, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Klaus Büttner, Klaus Kirchner, Matthias Warmuth, Nico Wolf
  • Patent number: 10027200
    Abstract: A rotor capable of fixing a balancer weight by an easier method. The rotor includes a shaft; a core having a core hole penetrating the core in an axial direction; a rod configured to be inserted into the core hole so as to protrude from one end surface of the core in the axial direction to the one side in the axial direction; a balancer weight having a weight hole and placed on the end surface with the rod inserted into the weight hole; and a fixing member having a fixing hole and coming into contact with the balancer weight from the one side in the axial direction with the rod inserted into the fixing hole to fix the balancer weight by sandwiching the balancer weight with the end surface.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: July 17, 2018
    Assignee: FANUC CORPORATION
    Inventors: Koudai Akashi, Yasuo Kawai
  • Patent number: 9973067
    Abstract: A rotor casting includes a lamination stack and a cast structure including proximal and distal cast end rings respectively adjacent proximal and distal end faces of the lamination stack. Cast axial ribs are distributed radially on a peripheral surface of the lamination stack and extend between the proximal and distal cast end rings. Cast feed members extend axially from the proximal cast end ring and are respectively positioned radially between an adjacent pair of axial ribs. In one example, cast bar segments integral to the proximal and distal cast end rings are formed in axial slots of the lamination stack. In one example, a bar insert in each axial slot has insert ends that extend respectively from the proximal and distal end faces of the lamination stack and are fully encapsulated respectively in the proximal and distal cast end rings. A method of forming the rotor casting is provided.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: May 15, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael D. Hanna, John S. Agapiou
  • Patent number: 9973062
    Abstract: A method of in situ formation of an aluminum carbon nanotube composite material and an induction motor component produced with such composite. The method includes forming an aluminum-based matrix by mixing a catalyst precursor with an aluminum powder such that a colloidal compound is formed that is subsequently sintered to leave a catalytically-active material formed on the surface of the aluminum powder. A carbon-containing gas is introduced to the composite catalyst that includes aluminum and the catalytic metal so that carbon nanotube reinforcements are grown on the aluminum-based matrix with the assistance of the catalytically-active metal. Additional mechanical processing steps may also include pressurizing, sintering and cold-rolling the aluminum carbon nanotube composite material.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: May 15, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Qigui Wang, Xinkuan Liu
  • Patent number: 9899900
    Abstract: A method is provided for fabricating a rotor assembly for an electric motor which utilizes pre-fabricated conductive rotor bars and die cast end rings. Containment rings, which may be installed on the end rings either before or after casting, may be used to inhibit end ring creep at high rotational speeds.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: February 20, 2018
    Assignee: Atieva, Inc.
    Inventors: Jeremy Mayer, Yifan Tang
  • Patent number: 9866095
    Abstract: A rotor comprises a rotor core comprising a rotational axis and a plurality of slots, a plurality of rotor bars inserted in the plurality of slots, and a plurality of holders arranged around a rotational axis of the rotor. Each holder comprises an insertion groove configured to receive and engage with an end of one of the plurality of rotor bars. An end of another rotor bar among the plurality of rotor bars is interposed between and coupled to two immediately neighboring holders among the plurality of holders.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: January 9, 2018
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Daesung Jung
  • Patent number: 9825501
    Abstract: An electric motor for high speed operation use and a rotor which enables use of common parts with electric motors for low speed operation use and which thereby enables reduction of the manufacturing costs. The rotor is provided with a shaft, a rotor core which is fastened to the shaft at the outside in the radial direction and has a first end face at one end in the axial direction and a second end face at the other end in the axial direction, a plurality of conductors which are arranged at the rotor core, and a pair of end rings which are respectively arranged adjoining the first end face and the second end face and which short-circuit the plurality of conductors with each other. The shaft has an outer circumference, while the end rings have outer circumferences which are arranged concentrically with respect to the outer circumference of the shaft.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: November 21, 2017
    Assignee: FANUC CORPORATION
    Inventor: Kyohei Katsuki
  • Patent number: 9806589
    Abstract: A squirrel-cage rotor manufacturing method capable of suppressing, at the time of performing die-casting, formation of gaps between closing portions and a rotor core at radially outer parts of rotor slots, or generation of a thermal stress in the rotor core as a result of expansion of the closing portions. The squirrel-cage rotor manufacturing method includes: arranging, through die-casting, conductors into rotor slots that are formed along a radially outer part of a rotor core; and performing the die-casting under a state in which radially outer parts of the rotor slots are closed with closing portions made of the same material as a material of the rotor core.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: October 31, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Taiga Komatsu, Hideaki Arita, Akihiro Daikoku, Yoshihiro Miyama, Moriyuki Hazeyama
  • Patent number: 9762106
    Abstract: A motor assembly with an integrated cooling system is provided in which a coolant (e.g., oil) is injected into a hollow region of the rotor shaft. The coolant is expelled out of the rotor shaft and into the motor enclosure via multiple thru-holes, thereby allowing efficient cooling of both the stator and the rotor assemblies.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: September 12, 2017
    Assignee: Atieva, Inc.
    Inventors: Jean-Philippe Gauthier, Jeremy Mayer, Yifan Tang
  • Patent number: 9755467
    Abstract: There is provided an open-type induction motor, and more particularly, to an open type induction motor in which a rotor has a structure allowing air to flow therein, thus enhancing cooling efficiency of the rotor and a stator. The open-type induction motor includes: a stator including an iron stator core having a radial duct hole and a stator coil wound around the iron stator core; and a rotor disposed in a hollow of the stator so as to be rotatable by magnetism generated by the stator coil, and including a rotational shaft, a plurality of iron rotor cores stacked in an axial direction of the rotational shaft and coupled to the rotational shaft, a rotor coil coupled to the plurality of iron rotor cores, and duct plates stacked between the plurality of iron rotor cores and outwardly discharging air present at the inner side of the iron rotor cores.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: September 5, 2017
    Assignee: Hyundai Electric & Energy Systems Co., Ltd.
    Inventors: Jong In Lee, Sung Hyun Moon, Kwang Soo Lee, Ok Jin Kim, Rae Eun Kim
  • Patent number: 9729034
    Abstract: A rotor with a two-step shaped slot may include a rotor core configured to include a plurality of shoe structures which have a two-step shaped slot, a plurality of rotor bars configured to be inserted into and coupled to the two-step shaped slot, and end rings configured to be coupled to both ends of the rotor core and to fix the rotor bars.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: August 8, 2017
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Daesung Jung
  • Patent number: 9712020
    Abstract: A rotor of an electric machine includes a rotor lamination stack connected to a rotor shaft for conjoint rotation therewith. The rotor lamination stack extends from a first axial face of the rotor lamination stack to a second axial face when viewed in the direction of an axis of rotation of the rotor lamination stack. The rotor lamination stack has bores distributed around the axis of rotation and extending from the first axial face to the second axial face. A tie rod which protrudes from the axial faces when viewed in the direction of the axis of rotation is inserted into each bore. Fastening elements are attached to the tied rods at both axial faces so that the rotor laminations of the rotor lamination stack are pressed together. A fan is attached to the tie rods on the first axial face of the rotor lamination stack.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 18, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Thomas Lange
  • Patent number: 9698635
    Abstract: A core for an electrical machine includes a core body. The core body extends long a rotation axis and includes two or more core segments axially stacked with one another along the rotation axis. A plurality of the core segments define notches that are axially-aligned to one another and form an axial slot. The first core segment notch has an area that is greater than an area of a second core segment notch to accommodate thermal expansion of the core.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: July 4, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Daniel Kuehn, Kevin L. Dickerson, Luke Wagner
  • Patent number: 9680340
    Abstract: An electrically rotating machine, includes a rotor and a stator, the rotor and/or the stator including a laminated core, with an air gap being formed between the rotor and the stator, said rotor having axially and radially extending cooling paths in flow communication with each other and in flow communication with radially extending cooling paths of the stator via the air gap, wherein the radially extending cooling paths of the stator are respectively axially aligned with the radially extending cooling paths of the rotor; at least one fan for conducting an air flow through the axially and radially extending cooling paths of the rotor, the air gap and the cooling paths of the stator, wherein the air gap has at least one constriction defined by sheets of the laminated core of the rotor having an outer radius greater than remaining ones of the sheets of the laminated core of the rotor and/or by sheets of the laminated core of the stator having a smaller inner radius than remaining ones of the sheets of the lamin
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: June 13, 2017
    Assignee: SIEMENS AKTEINGESELLSCHAFT
    Inventors: Felix Noack, Zdenek Spera, Christoph Stuckmann, Sebastian Weiss
  • Patent number: 9657747
    Abstract: A motor cooling system for a simply supported compressor includes a rotor shaft 24 having a first end 26 and a second end 28. The rotor shaft 24 includes an axial bore 60 and a plurality of shaft radial holes 64 extending from a first end of the axial bore 60, wherein a cooling medium is supplied to the axial bore 60. The cooling system further includes a rotor 22 coupled to the rotor shaft 24 and having a plurality of rotor axial holes 25 and a plurality of rotor radial holes 27. The plurality of rotor radial holes 27 extends from the plurality of rotor axial holes 25. A refrigerant dam 70 is arranged adjacent a first end of the rotor 22 and includes a plurality of dam axial holes 74 fluidly coupled to an interior cavity 72. The dam axial holes 74 align with the rotor axial holes 25 and the interior cavity 72 aligns with the shaft radial holes 64 to form a flow path between the rotor shaft 24 and the rotor 22.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: May 23, 2017
    Assignee: CARRIER CORPORATION
    Inventor: Vishnu M. Sishtla
  • Patent number: 9621001
    Abstract: A rotor assembly for an electric machine includes a plurality of lamination sheets. Each of the lamination sheets defines an aperture. The lamination sheets are disposed adjacent each other to define a laminated stack. The apertures are aligned with each other to define a slot extending parallel with a central axis of the laminated stack. A magnet is disposed within the slot. The lamination sheets include a group of recess lamination sheets and a tab lamination sheet. The tab lamination sheet includes a tab that extends into the slot, and into abutting engagement with the magnet to bias the magnet against a wall of the slot. The apertures of the group of recess lamination sheets include a groove portion that defines a groove. The tab of the tab lamination sheet is at least partially disposed within the groove defined by the recess lamination sheets.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: April 11, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Edward L. Kaiser, Paul Buchholz
  • Patent number: 9601954
    Abstract: A rotor of an electric machine includes a rotor lamination stack connected to a rotor shaft for conjoint rotation therewith. The rotor lamination stack extends from a first axial face of the rotor lamination stack to a second axial face when viewed in the direction of an axis of rotation of the rotor lamination stack. The rotor lamination stack has bores distributed around the axis of rotation and extending from the first axial face to the second axial face when viewed in the direction of the axis of rotation. A tie rod which protrudes from the axial faces when viewed in the direction of the axis of rotation is inserted into each bore. Fastening elements are attached to the tied rods at both axial faces so that the rotor laminations of the rotor lamination stack are pressed together. The tie rods are cast in the bores by a casting material.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: March 21, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Thomas Lange
  • Patent number: 9531226
    Abstract: A rotor of an internal permanent magnet synchronous motor including a rotor core, a plurality of slots formed in the rotor core, and a plurality of permanent magnets housed in the plurality of slots. Each of the slots includes a holding part formed between a first outside diameter surface and a first inside diameter surface to hold each of the permanent magnets, and an opening part formed at both sides of the holding part and formed by a second outside diameter surface, a second inside diameter surface and a connecting surface connecting them. The second outside diameter surface is formed to a curved shape so that a distance to an outer circumferential surface of the rotor core in the diametrical direction gradually becomes smaller from both ends of the second outside diameter surface to an intermediate part in the circumferential direction.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: December 27, 2016
    Assignee: Fanuc Corporation
    Inventors: Yohei Arimatsu, Kenji Kawai
  • Patent number: 9520760
    Abstract: A rotor includes a stacked core having a plurality of slots formed on an inner side thereof, a plurality of rotor bars inserted in the plurality of slots, a pair of end rings assembled and fastened to opposite ends of the rotor bars, a pair of retainers fastened to opposite outer end surfaces of the rotor bars in an assembled and fastened manner, and a shaft inserted into the pair of end rings.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: December 13, 2016
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Sang-Jin Kim
  • Patent number: 9515536
    Abstract: A cage rotor for an synchronous machine includes a laminated rotor core, shorting bars arranged inside the laminated rotor core, shorting rings which are cast onto the laminated rotor core and which electrically interconnect the shorting bars to front sides of the laminated rotor core, and heat pipes introduced into the laminated rotor core in the axial direction such that they protrude onto the front side from the laminated rotor core and protrude into the shorting rings.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: December 6, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Klaus Büttner, Klaus Kirchner
  • Patent number: 9479019
    Abstract: A brushless starter generator includes a wound field generator having a rotor that includes a damper winding, wherein the damper winding includes a plurality of poles. Also included is at least one pole face disposed within each of the plurality of poles, wherein the at least one pole face comprises a slot opening. Further included is at least one damper bar relatively entirely filling the slot opening.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: October 25, 2016
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventor: John F. Bangura
  • Patent number: 9419492
    Abstract: An interface for transmitting electrical power to a motor of a motor-compressor is provided. The interface may include a receptacle having a first end portion coupled with a stator of the motor and a second end portion defining a hole at least partially extending therethrough. The interface may also include a plug configured to be detachably coupled with the receptacle. The plug may include a rigid, conductive rod having a first end portion configured to be coupled with a penetrator of the motor-compressor, and a second end portion configured to be at least partially disposed in the hole of the receptacle and detachably coupled therewith. The rigid, conductive rod may be configured to electrically couple the penetrator with the receptacle, and the receptacle may be configured to transmit the electrical power to the stator.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: August 16, 2016
    Assignee: Dresser-Rand Company
    Inventors: Jose L. Gilarranz, William C. Maier, William C. Egan, Axel Moehle, Patrick Gels, Marco Festa, Andreas Bethge, Pal Benestad, Jonas Nelson
  • Patent number: 9403135
    Abstract: A mixing container has a wall enclosing a mixing volume, an anchor fixed at the wall of the mixing container inside the mixing volume, and at least one mixing plate movably mounted to the anchor to allow a relative movement of the at least one mixing plate along a stir direction perpendicular to the extension of the mixing plate. Each of the at least one mixing plates is provided with at least one magnet.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: August 2, 2016
    Assignee: Sartorius Stedim North America Inc.
    Inventor: Jonathan Cutting
  • Patent number: 9379595
    Abstract: A rotating electrical machine includes an annular stator, a plurality of coils, a case, a side cover, a refrigerant passage, supply ports, and a strainer. The annular stator has an axis. The plurality of coils are provided about the axis. The case houses the stator. The side cover is disposed at one axial end of the case so as to face the stator in an axial direction along the axis. The refrigerant passage is provided in the side cover along a circumferential direction. The supply ports supply refrigerant from the refrigerant passage toward axial ends of the plurality of coils. The strainer is provided inside the refrigerant passage to be erected so as to intersect with the axis. The strainer has a plate-shaped member including holes to trap foreign matter in the refrigerant while the refrigerant passes through the holes.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: June 28, 2016
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Norikazu Kawai, Shinji Fujimoto
  • Patent number: 9350217
    Abstract: A method of forming a rotor, wherein the rotor includes a plurality of conductor bars each joined to a shorting ring, includes disposing an end of each of the plurality of conductor bars within a respective one of a plurality of cavities defined by the shorting ring. The method also includes, after disposing, deforming the end of each of the conductor bars, and brazing the end of each of the conductor bars to the shorting ring to form the rotor. A rotor includes a shorting ring defining a plurality of cavities therein each having a shape, a plurality of conductor bars each having an end disposed within a respective one of the cavities and joined to the shorting ring, wherein the end is deformable to the shape, and a braze material disposed in contact with the end of each of the conductor bars within a respective one of the cavities.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: May 24, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: John S. Agapiou, Thomas A. Perry, James G. Schroth
  • Patent number: 9343939
    Abstract: An electric motor is configured with a stator core assembly that includes a stator core having a plurality of winding slots. A plurality of stator windings pass through the plurality of winding slots that include slot liners configured to provide electrostatic shields surrounding the plurality of stator windings. The electrostatic shields are referenced to an electrical location to reduce common mode currents associated with the electric motor.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: May 17, 2016
    Assignee: General Electric Company
    Inventors: Michael Joseph Schutten, Manoj Ramprasad Shah, Satish Prabhakaran, Robert James Thomas
  • Patent number: 9287759
    Abstract: In an induction motor, when dimensions of respective elements of a rotor slot are defined as TB: a shortest distance between a center side of an inner circumferential slot and an outer circumference of the rotor; TC: a circumferential width of an innermost circumference of an outer circumferential slot; TD: a circumferential width of an outermost circumference of the inner circumference slot; and TE: a shortest distance between an end side of the inner circumferential slot and the outer circumference of the rotor, and when dimensions of respective elements of a stator iron core are defined as TF: a width of teeth; TG: a width of a teeth tip end; and TH: a width of a slot opening part, the dimensions of the respective elements of the rotor slot and the dimensions of the respective elements of the stator iron core satisfy the following relationships: TF/(TG+TH)×TD/2?TB?TD/2; and TF/(TG+TH)×TD/2?TE?TD/2.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: March 15, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yabe, Hayato Yoshino, Takahiro Tsutsumi, Kazuhiko Baba, Tomoaki Oikawa
  • Patent number: 9219399
    Abstract: A method for fabricating a rotor for an induction motor includes disposing a first flux material on a plurality of first exposed ends of a respective plurality of conductor bars of a rotor core. A second flux material is disposed on a first end face of the rotor core. A first portion of a conductive material is cast over the plurality of first exposed ends to form a first shorting end ring to electrically and mechanically connect the plurality of conductor bars.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: December 22, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Richard M. Kleber, Michael D. Hanna
  • Patent number: 9130434
    Abstract: An induction rotor includes a rotor core having an axial end surface, an end ring proximate the axial end surface that provides electrical communication between respective ends of conductor bars extending through the rotor core, and an end ring support structure that includes a ring member at least partially embedded in the end ring. An end ring support structure may have at least one axially extending member coupled with the ring member, such axially extending member projecting axially inwardly of the axial end surface and engaging the rotor core. An end ring support structure may include a ring member having an axially extending portion embedded in the end ring between radially inner and outer surfaces of the end ring whereby the end ring includes an outer portion, radially outwardly of the axially extending portion, and an inner portion disposed radially inwardly of the axially extending portion of the ring member.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: September 8, 2015
    Assignee: Remy Technologies, LLC
    Inventors: Bradley D. Chamberlin, Andrew Worley
  • Patent number: 9071112
    Abstract: A squirrel-cage rotor and a production method thereof, the rotor having conductors with sufficient strength. In the invention, conductor particles are sprayed onto a core and/or conductive bars in a solid-state. As a result, in the coating material, the enlargement of the crystal grain of the conductors is significantly restricted, whereby conductive end rings are connected to the core and/or the conductive bars. Since conductor particles do not melt, a gap formed by thermal contraction when the conductor melts between different kinds of members is prevented from being formed. Therefore, the deterioration of the conductor may be limited, and the conductor may have sufficient strength. The reliability of the rotor is improved.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: June 30, 2015
    Assignee: FANUC CORPORATION
    Inventors: Hisashi Maeda, Masamoto Fukuda, Takafumi Kajiya
  • Patent number: 9065314
    Abstract: A rotor (10) of a buried magnet-type electric motor, wherein the magnetic poles thereof are each constituted by two rows of magnets (M1, M2) of the same pole, wherein a core portion (12) between magnet slots of the same pole is arranged between the magnet slots (31, 32) in which the two rows of magnets are arranged, and wherein, of the edges constituting said magnet slots, the portions connecting the edges (31a, 32a) on the inner side in the radial direction to the outer edges of the core portion between the magnet slots of the same pole, have curved portions (41, 42) that connect a curve of a small curvature to a curve of a large curvature starting from the edges on the inner side in the radial direction and heading toward the outer edges of the core portion between the magnet slots of the same pole.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: June 23, 2015
    Assignee: FANUC CORPORATION
    Inventors: Yohei Arimatsu, Kenji Kawai
  • Publication number: 20150130321
    Abstract: An induction rotor assembly having an induction cage that is formed using a combination of liquid and solid materials. The first and second end plates of the induction cage may be fabricated before the casting of the conductors of the induction cage. According to certain embodiments, the first and second end plates may be assembled with first and second molds and a rotor core to form a casting assembly. A liquid casting material may be injected into the casting assembly, wherein the liquid casting material may solidify within one or more core passageways of the rotor core, thereby forming the conductors of the induction cage. The first and second end plates may also include flow channels that may be configured to facilitate the flow of the liquid casting material in the casting assembly, and increase the area of contact between the liquid casting material, when solidified, and the end plates.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventors: Petri Juhani Maki-Ontto, Fredrik Andreas Boxberg
  • Patent number: 9024501
    Abstract: Induction motors may have a rotor that includes a shaft and a plurality of rotor laminations. The plurality of rotor laminations may have a central bore sized to receive the shaft, and the shaft may have a laminated portion that extends throughout the central bore. In other embodiments, the plurality of rotor laminations may have a very small or no central bore, and the shaft may include first and second end pieces respectively attached on opposite sides of the plurality of rotor laminations. In some embodiments, the first and second end shaft pieces may be attached to the rotor laminations with a through bolt that passes through the rotor laminations via a central bore sized no larger than needed to receive the through bolt, allowing each of the rotor laminations to have a larger laminated surface area. Methods of assembling a rotor are also provided, as are other aspects.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: May 5, 2015
    Assignee: Siemens Industry, Inc.
    Inventors: Nicholas G. Lang, Michael A. Graman
  • Publication number: 20150102698
    Abstract: A rotor comprises a rotor core comprising a rotational axis and a plurality of slots, a plurality of rotor bars inserted in the plurality of slots, and a plurality of holders arranged around a rotational axis of the rotor. Each holder comprises an insertion groove configured to receive and engage with an end of one of the plurality of rotor bars. An end of another rotor bar among the plurality of rotor bars is interposed between and coupled to two immediately neighboring holders among the plurality of holders.
    Type: Application
    Filed: October 7, 2014
    Publication date: April 16, 2015
    Inventor: Daesung Jung
  • Publication number: 20150102697
    Abstract: A rotor with a two-step shaped slot may include a rotor core configured to include a plurality of shoe structures which have a two-step shaped slot, a plurality of rotor bars configured to be inserted into and coupled to the two-step shaped slot, and end rings configured to be coupled to both ends of the rotor core and to fix the rotor bars.
    Type: Application
    Filed: October 7, 2014
    Publication date: April 16, 2015
    Inventor: Daesung Jung
  • Patent number: 8994242
    Abstract: An induction motor has a rotor core including a plurality of conductor bars and a shorting end ring having a plurality of grooves aligned with and mated to the first ends of the conductor bars. The rotor core further includes a cylindrically shaped steel laminate stack including a plurality of longitudinal grooves distributed around the periphery of the steel laminate stack. The conductor bars are each located in one of the plurality of longitudinal grooves and each includes a first end projecting from a first end of the steel laminate stack. The rotor core further includes an end sheet located to the end of the steel laminate stack, the end sheet including a retention feature configured to retain the shorting end ring to the end sheet.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 31, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Richard M. Kleber
  • Publication number: 20150084473
    Abstract: An induction motor includes multiple conductor bars buried and disposed in a rotor core in a circumferential direction, and end rings joined with the multiple conductor bars so as to cause respective both ends thereof to be electrically conducted. Each conductor bar includes a first bar-shape metal portion, and two second metal portions joined with both ends thereof. The second metal portion is formed in a solid block shape. The first and second metal portions are joined with each other by friction stir welding or friction welding.
    Type: Application
    Filed: March 13, 2014
    Publication date: March 26, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Taizo TOMIOKA
  • Patent number: 8963394
    Abstract: The invention relates to a cage rotor for an asynchronous machine (1) comprising starting bars for improving the starting behavior. The invention further relates to a method for producing such a cage rotor. In order to achieve as great an efficiency as possible, the cage rotor comprises a laminated rotor core (2) having grooves (3) and operating bars (5; 6; 7; 8; 15) disposed in the grooves (3) and contacting the laminated rotor core (2) directly on the inner groove base as seen in the radial direction of the cage rotor, wherein the operating bars (5; 6; 7; 8; 15) comprise partial cladding (9; 10; 11) enclosing an outer surface of the operating bars (5; 6; 7; 8; 15) as seen in the radial direction (12) of the cage rotor, wherein the material of the operating bars (5; 6; 7; 8; 15) comprises a greater specific conductivity than the material of the partial cladding (9; 10; 11).
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: February 24, 2015
    Assignee: Siemens AG
    Inventors: Klaus Büttner, Klaus Kirchner, Michael Müller
  • Patent number: 8946969
    Abstract: A squirrel-cage rotor of an asynchronous machine, in particular a die-cast rotor, includes a rotatable shaft, a laminated core being rotation-locked on the shaft and having grooves and opposing end faces. A squirrel-cage winding has rotor rods disposed in the grooves and a cage ring disposed on each of the end faces and electrically connecting the rotor rods. A pair of retaining elements is disposed on the shaft, wherein each retaining element extends in a radial direction in form of a disk or a spoke and has in an axial direction a wall and/or an axially extending finger. The wall overlaps on a radial periphery in the axial direction both the cage ring and a predefined axial section of the rotor rods that terminate in the cage ring, without increasing an external diameter of the laminated core.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: February 3, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Volker Dölz