Squirrel Cage Patents (Class 310/211)
  • Patent number: 10819198
    Abstract: In a method for producing a squirrel-cage rotor for an asynchronous machine, conductor rods made from a first conductive material are inserted in substantially axial grooves of a laminated rotor core in such a manner that the conductor rods protrude from an end face of the laminated rotor core. A short circuit ring disc made from a second conductive material and heated above the recrystallization temperature is axially pressed onto the protruding conductor rods on the end face of the laminated rotor core, taking into account a temperature range, a deformation, and the rate of deformation of the short circuit ring, with a permissible shear stress of the first and second conductive materials being locally exceeded and material transitions being caused by diffusion at an interface between the conductor rods and the short circuit ring, thereby resulting in microwelding. Subsequently or simultaneously the short circuit ring disc is hot shaped.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: October 27, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Klaus Büttner, Klaus Kirchner, Matthias Warmuth
  • Patent number: 10807049
    Abstract: A machine (1) for homogenising a food substance has: a container (10) with a side wall (11) and a bottom wall (12) delimiting a cavity (10?); an impeller (30) with an impelling member (31) forming an impelling surface (31?,31?,31?) that is drivable in rotation (r) about a central axial direction (30?) of the impelling surface (31?,31?,31??) for imparting a mechanical effect to the food substance; and a module (20) which has a housing means (22?) that contains an inner chamber (22,22a) and that delimits a seat (21) for the container (10), the chamber (22,22a) containing an electric motor (24). The electric motor (24) has an output drive axis (24?) with a driver device (24?) configured to drive a follower device (35) of the impeller (30). The driver device (24?) and the follower device (35) are magnetically coupled through a sidewall (11) and/or bottom wall (12) of the container (10).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: October 20, 2020
    Assignee: Societe des Produits Nestle S.A.
    Inventors: Samer Abdo, Sylvain Decastel, Jean-Luc Denisart, Bertrand Guyon, Marco Magatti, Alexa Perrin, Didier Pont, Mohamed Raad, Laurent Seydoux
  • Patent number: 10804781
    Abstract: An electrical machine includes a stator and a rotor in magnetic communication with the stator. The rotor has a cage construction, the rotor having a plurality of passages extending therethrough from a first end of the rotor to a second end of the rotor. A rotor cage has two end rings, one of the end rings disposed at each of the first end and the second end of the rotor, and having a plurality of conductor bars extending through the rotor from the first end to the second end and coupled with the end rings. The conductor bars each include a transition region adjacent to each end ring, and a central region disposed between the two transition regions. Each transition region includes at least one conductor bar dimension that increases proximate the end rings.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 13, 2020
    Assignee: ABB Schweiz AG
    Inventors: Wen Ouyang, Colin Tschida
  • Patent number: 10804761
    Abstract: The present disclosure provides a rotor mechanism includes a rotor core and a plurality of rotor bars. The rotor core has a plurality of insertion slots arranged along an edge of the rotor core. Each of the plurality of rotor bars has an insertion portion and two protruding portions. The insertion portions are respectively located in the plurality of insertion slots, wherein in each of the plurality of rotor bars, the two protruding portions are respectively connected to two opposite ends of the insertion portion and respectively protrude from two opposite sides of the rotor core, and the two protruding portions each has an extension direction, that has an angle with respect to an extension direction of the insertion portion, in order to clamp and fix the rotor core therebetween. In addition, the present disclosure also provides a method for manufacturing the rotor mechanism.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: October 13, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yu-Hsun Wu, Ming-Mao Hsu, Yu-Yuan Chen
  • Patent number: 10778051
    Abstract: A rotor fabrication method is provided. The rotor uses pre-fabricated conductive rotor bars in which the ends have been shaped and sized to fit within corresponding end cap receptacles. After assembly, the structure is compressed, thereby achieving mechanical and electrical coupling between the conductive rotor bars and the end caps. Locking members disposed at either end of the assembly maintain the desired level of axial compressive force on the structure.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: September 15, 2020
    Assignee: ATIEVA, INC.
    Inventors: Stephen W. Simons, Jeremy Mayer
  • Patent number: 10770957
    Abstract: A method for producing a short circuit rotor, by providing a laminated rotor core with through openings for shorting bars of a squirrel cage as well as providing the shorting bars; inserting of the shorting bars into the through openings such that an axial overhang remains on both sides; placing a main disk with through openings on both sides for the shorting bars, whose axial length corresponds to the overhang, as well as an edge disk immediately adjacent to the main disk and the ends of the shorting bars. The main disk and the edge disk form a shorting ring of the squirrel cage, and the main disk and the edge disk are welded by radially encircling electron beam welding.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: September 8, 2020
    Assignee: AUDI AG
    Inventors: Korbinian Weber, Jörg Rücker
  • Patent number: 10756606
    Abstract: A rotor for an asynchronous electrical machine comprising a magnetic ring comprising a plurality of layers of ferromagnetic metal sheets stacked axially and a squirrel cage having a plurality of conductive elements regularly distributed over the periphery of the magnetic ring and each having two opposite ends extending axially beyond the magnetic ring and each connected to a short-circuit crown, arranged axially on either side of the magnetic ring and intended to connect the ends of the conductive elements electrically. The rotor is segmented circumferentially into at least two rotor segments.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: August 25, 2020
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventors: Christophe Galmiche, Remy Muller, Fabien Roche
  • Patent number: 10700581
    Abstract: A method of making an AC induction motor includes: providing a rotor and a stator for the AC induction motor; determining, for different geometries of an end ring of the rotor, a location of a first centroid of current density in the end ring; determining, for end turns of the stator, a location of a second centroid of current density in the end turns; selecting a geometry for at least the endring of the rotor so that an axial distance between the first centroid of current density and the second centroid of current density is minimized; and assembling the AC induction motor, wherein the end turns and the end ring have the selected geometries.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: June 30, 2020
    Assignee: Tesla, Inc.
    Inventors: Konstantinos Laskaris, Andrew D. Baglino
  • Patent number: 10666102
    Abstract: An electric machine capable of easily and efficiently assembling a rotor core to a rotating shaft is provided. A rotor core is formed by laminating a first steel plate consisting of one or more electromagnetic steel plates having a first protrusion portion to be accommodated in a groove portion of a rotating shaft and a second steel plate consisting of one or more electromagnetic steel plates having a second protrusion portion to be accommodated in the groove portion of the rotating shaft. The first protrusion portion of the first steel plate has a first engaging portion deformed by a side surface of the groove portion of the rotating shaft. At least a part of the first engaging portion of the first steel plate is disposed in a space formed between a second protrusion portion of the second steel plate and the side surface of a groove portion of the rotating shaft.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: May 26, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hiromitsu Okamoto, Shinji Yamazaki, Yuichiro Baba, Ryoji Kobayashi, Motoo Kitahara, Yuki Arai
  • Patent number: 10637313
    Abstract: A rotor for an asynchronous machine includes a laminated core and a short-circuit cage which is at least partially integrated in the laminated core, in which the short-circuit cage is made of rods having or made from a first electrically conductive material and short-circuit rings having or made from a second electrically conductive material. A support ring is provided on at least one of the short-circuit rings and is in mechanical contact therewith. The at least one short-circuit ring and/or the support ring has a contour for creating the mechanical contact, and the mechanical contact is a press fit.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: April 28, 2020
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Holger Ulbrich, Manfred Siegling, Josef Lichtinger
  • Patent number: 10630151
    Abstract: A rotor for an induction motor includes a first shorting end ring, a second shorting end ring, and a plurality of conductor bars. Each conductor bar has a first end and a second end and is coated with an electrically conductive material. The first end of each conductor bar is in electrical and mechanical contact with the first shorting end ring, and the second end of each conductor bar is in electrical and mechanical contact with the second shorting end ring. The conductive material is disposed between each conductor bar and the respective shorting end rings.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: April 21, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: John S. Agapiou, Thomas A. Perry, James G. Schroth, Hongliang Wang, Michael P. Balogh
  • Patent number: 10570987
    Abstract: A damper pulley for a crankshaft includes a hub mounted on one end of the crankshaft, a rim connected to the hub, an oil seal mounted on an outer surface of the hub, and a wear-resistant insert member integrally mounted on the hub and making contact with the oil seal.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 25, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Mun Gu Kang, Hee Sam Kang, Hyo Moon Joo, Young Chan Kim, Min Soo Kim, Jae Kwon Lee
  • Patent number: 10554091
    Abstract: According to another embodiment of the present invention, an electric machine is provided. The machine includes a housing and a stator. The stator is fixedly secured to the housing. The machine also includes a rotor. The rotor is rotatably secured to the housing. At least one of the housing, the stator and the rotor include an inner wall defining a passageway adapted for improved fluid flow therethrough.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: February 4, 2020
    Assignee: Regal Beloit America, Inc.
    Inventors: Rachele Barbara Cocks, Suresh Datal, Umesh M. Savarkar, John Sheldon Wagley
  • Patent number: 10530228
    Abstract: A rotating element for a dynamo-electric machine such as an electric induction motor. The rotating element includes a plurality of axially stacked laminations cooperatively defining a plurality of arcuately spaced bar slots. The rotating element also includes a plurality of bars, with each bar extending through one of the bar slots. Each of the bars comprises copper-impregnated polymer.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: January 7, 2020
    Assignee: Nidec Motor Corporation
    Inventors: Mark D. Weisheit, Liming Zhou
  • Patent number: 10525647
    Abstract: Provided is a servo press machine having a configuration that allows miniaturization of the servo press machine, and a motor using the same. A servo press machine includes a servomotor, a crankshaft rotated by driving of the servomotor, a connecting rod connected to an eccentric portion of the crankshaft, and a slide connected to the connecting rod, wherein two connecting rods are connected to the crankshaft, the servomotor is an axial gap motor, a rotor of the axial gap motor is assembled with the crankshaft between the two connecting rods, and a stator of the axial gap motor is fixed to a crown in which the crankshaft is housed.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 7, 2020
    Assignee: AIDA ENGINEERING, LTD.
    Inventors: Shougo Shibasaki, Masataka Yahara, Fumio Tajima
  • Patent number: 10505433
    Abstract: An electric machine rotor, which extends along an axis of rotation, including a short-circuit cage, the or each first connection means between a respective first end part of the or each bar and the first short-circuit ring includes a plurality of flexible electrically conductive blades.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: December 10, 2019
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED
    Inventors: Christophe Galmiche, Pierre Humbert, Christophe Klinger
  • Patent number: 10491085
    Abstract: A rotor for an electromagnetic machine and a method of assembling the rotor are provided. In one embodiment, the rotor includes a lamination stack disposed about a rotational axis a plurality of conductor bars disposed within corresponding slots formed in the lamination stack and extending beyond the longitudinal ends of the lamination stack. End rings are positioned at either end of the lamination stack and define a plurality of openings configured to receive the ends of the conductor bars. Each end ring includes separate inner and outer concentric rings. The inner and outer rings define radially outer and inner surfaces configured to about one another and each of the concentric rings defines a portion of each conductor bar opening in the end ring.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: November 26, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: John S. Agapiou, Blair E. Carlson
  • Patent number: 10476363
    Abstract: A hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: November 12, 2019
    Inventor: Louis J. Finkle
  • Patent number: 10476361
    Abstract: A cage rotor for an electric machine, has a laminated rotor core having a groove, a rotor end ring that is cast on to one axial end of the laminated core and has a first material and a bar situated in the groove and supported by a deformable bearing having a bearing device. A laminated rotor core for a cage rotor includes a groove and a bearing device, an electric machine with a cage rotor, a method for producing a laminated rotor core by producing a bearing device on the laminated rotor core, and a method for producing a cage rotor by supporting a bar in a groove by a deformable bearing having a bearing device.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 12, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Konrad Brandl, Siegfried Fichtner, Maximilian Pfaller, Patryk Piotrowski, André Trepper
  • Patent number: 10468926
    Abstract: Described herein is a motor including a stationary section and a rotating section. The stationary section includes a stator core having a plurality of teeth, and a coil constituted by a conducting wire wound around each of the plurality of teeth. The rotating section has a plurality of magnets arranged in a circumferential direction, a rotor core which is in contact with the magnets, a magnet holder which is fixed to the rotor core, and an annular plate. The lower surface of the annular plate faces the upper surface of the magnets. Further, the annular plate is fixed to the rotor core and the magnet holder. Employing this structure enables the annular plate to further prevent an upward position shift of the magnets.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: November 5, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Hidehiro Haga, Masato Aono, Takashi Hattori
  • Patent number: 10461616
    Abstract: A rotor for an asynchronous machine has a laminated core and a short-circuit cage at least partially integrated in the laminated core. The short-circuit cage is designed with rods having or consisting of a first electrically conductive material and short-circuit rings having or consisting of a second electrically conductive material. At least one of the short-circuit rings is designed with a support ring, and each support ring is designed as a structure interlockingly and/or integrally cast onto or into the associated short-circuit ring.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: October 29, 2019
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Josef Lichtinger, Holger Ulbrich, Manfred Siegling
  • 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: 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: 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: 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: 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: 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