Laminated Core Patents (Class 310/216.004)
  • Patent number: 11990795
    Abstract: An adhesively-laminated core for a stator capable of suppressing an iron loss of an electric motor and also having excellent productivity is provided. The adhesively-laminated core for a stator includes a plurality of electrical steel sheets which are stacked on one another and of which both surfaces are coated with insulation coatings, and adhesion parts which are disposed between the electrical steel sheets adjacent to each other in a stacking direction and cause the electrical steel sheets to be adhered to each other. All sets of the electrical steel sheets adjacent to each other in the stacking direction are adhered via the adhesion parts. An adhesive forming the adhesion parts is a two-agent type acrylic-based adhesive (SGA) which includes an acrylic-based compound, an oxidizer, and a reducer and in which a portion of the acrylic-based compound and the oxidizer are assigned to a first agent and the remaining portion of the acrylic-based compound and the reducer are assigned to a second agent.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kazutoshi Takeda, Hiroyasu Fujii, Shinsuke Takatani
  • Patent number: 11962199
    Abstract: A rotor includes a shaft, a cylindrical rotor core, a connector, magnets and a cover. The shaft extends along a central axis. The rotor core surrounds the shaft. The connector is provided radially inside the rotor core and connects the rotor core and the shaft. The magnets are provided radially outside the rotor core along a circumferential direction. The cover is provided radially outside the magnets. The connector includes a cylindrical body surrounding the shaft and a flange. The flange extends radially outward from one axial end of the body and faces the magnets in the axial direction. The cover includes a peripheral surface and an eave. The peripheral surface faces the magnets in a radial direction. The eave extends radially inward from an other axial end of the peripheral surface and faces the magnets in the axial direction.
    Type: Grant
    Filed: February 7, 2022
    Date of Patent: April 16, 2024
    Assignee: NIDEC CORPORATION
    Inventors: Tomoya Ueda, Toshiyuki Sasaki
  • Patent number: 11923130
    Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: March 5, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Masahito Kamikawabata, Ryu Hirayama, Kazutoshi Takeda
  • Patent number: 11881350
    Abstract: A laminated core comprising a plurality of lamination sheets made of a soft magnetic alloy is provided. The lamination sheets have a main surface and a thickness d. The main surfaces of the lamination sheets are stacked one on top of another in a direction of stacking. Adjacent lamination sheets are joined to one another by a plurality of substance-to-substance joints, the joints being filler-free and entirely surrounded by the main surfaces of the adjacent lamination sheets.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: January 23, 2024
    Assignee: VACUUMSCHMELZE GMBH & CO. KG
    Inventors: Frederic Bäcker, Jens Diehl, Dominik Fackelmann
  • Patent number: 11824401
    Abstract: In the stator core, recessed surface portions uniformly recessed toward an inner side in a radial direction over a range wider than a width of each of pole teeth are respectively formed on an outer peripheral surface where an annular back yoke and each of the pole teeth provided to protrude on the inner side in the radial direction cross each other.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: November 21, 2023
    Assignee: SHINANO KENSHI KABUSHIKI KAISHA
    Inventor: Yo Hirose
  • Patent number: 11772149
    Abstract: Metal sheets are connected in that a hole is introduced into metal sheets of a first stack, and a region of metal sheets of a second stack are deformed in a stack direction. The deformed region can be plastically deformed in such a way that there is interlocking of the deformed region with at least one metal sheet lying below same. In embodiments, the hole has a shape with a reduced width at the center.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: October 3, 2023
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Wilfried Schwenk
  • Patent number: 11728699
    Abstract: A stator assembly and an electric motor are provided. The stator assembly has an upper end cover, a stator core, an insulation frame, a fixing piece and a communicating piece. The stator core is located below the upper end cover. The insulation frame is arranged on the stator core. The fixing piece is arranged at a top of the insulation frame. One end of the communicating piece is sandwiched between the fixing piece and the upper end cover, and another end extends in a thickness direction of the upper end cover and is connected to the stator core. The fixing piece fixes the insulation frame, the communicating piece and the upper end cover.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: August 15, 2023
    Assignees: FOSHAN WELLING WASHER MOTOR MANUFACTURING CO., LTD., HUAI'AN WELLING MOTOR MANUFACTURING CO., LTD.
    Inventors: Jing Ren, Jianwu Tang, Xiaogang Zhu, Xi Luo
  • Patent number: 11728697
    Abstract: A stator for an electric motor is described. An example stator includes a stator core having teeth that are radially arranged about a common central axis of the stator and located in a spaced apart manner from one another. Each tooth has an inward portion and an outward portion. The example stator further includes an electrically transmissive coil of wire that is wound contiguously upon the inward portions of at least a subset of teeth from the plurality of teeth. The stator also includes wedge members that are radially arranged about the common central axis and located intermittently with the plurality of teeth such that each wedge member abuts with the outward portions of adjacently located teeth.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: August 15, 2023
    Assignee: TESLA, INC.
    Inventors: Kalonica Christie, James Murphy, Leif Olsen, David Nelson, Christopher Edwards
  • Patent number: 11563346
    Abstract: A rotor for a machine has a plurality of rotor segments, each rotor segment forming at least one rotor pole and having a plurality of permanent magnets interior to the rotor and at least one saturatable bridge section for each permanent magnet in the rotor segment, each saturatable bridge section comprising a protrusion between air regions separating a north pole and a south pole of the permanent magnet to cause a portion of magnetic flux from the permanent magnet to traverse the saturatable bridge and cause a majority of the permanent magnet flux through an air gap of a rotor-stator interface between the rotor and a stator of the machine and through a stator pole.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: January 24, 2023
    Assignee: QM Power, Inc.
    Inventor: Charles J Flynn
  • Patent number: 11535021
    Abstract: In a method for producing a lamination stack for rotors and/or stators of electric motors or generators, laminations are punched from electrical steel, a light-activated adhesive is applied to at least one side of the laminations, respectively, and the adhesive is irradiated and activated with a light of a required wavelength immediately before the adhesive exits from an application unit. The laminations are then stacked to a lamination stack. An adhesive application device for carrying out the method has at least one application unit with at least one valve for discharging an adhesive. At least one radiation source is arranged in a region of the valve and emits a radiation and directs the radiation to the adhesive provided in the region of the at least one valve.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: December 27, 2022
    Assignee: Kienle + Spiess GmbH
    Inventor: Björn Böker
  • Patent number: 11482902
    Abstract: A stator includes a core and an over-molded midsection arranged to define a plurality of slots, and a plurality of conductors wound within the slots. Portions of the midsection immediately adjacent to the slots have iron particles embedded therein such the portions have magnetic permeability greater than other portions of the midsection lacking the iron particles.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: October 25, 2022
    Assignee: Ford Global Technologies, LLC
    Inventors: Franco Leonardi, Leyi Zhu
  • Patent number: 11444502
    Abstract: A coil bobbin of the present disclosure is a coil bobbin attached to a stator core of a distributed winding radial gap-type rotating electric machine, and includes a teeth holding portion and a slot insulator which are made of an insulator. The teeth holding portion has: a first wall surface that covers a first circumferential side surface of a tooth of the stator core; a second wall surface that covers at least a part of a second circumferential side surface of the tooth; and a third wall surface that covers both side surfaces in an axial direction of the tooth. The slot insulator is formed integrally with the first wall surface of the teeth holding portion, and has a plurality of through-holes extending in the axial direction and arrayed in a radial direction.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: September 13, 2022
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Yuji Enomoto, Seiji Okita, Keisuke Suzuki, Kohei Eto, Eiji Katayama
  • Patent number: 11431212
    Abstract: A method of manufacturing a rotor including a rotor core and a permanent magnet that is bonded to the rotor core with an adhesive containing a foaming agent, wherein applying the adhesive includes applying the adhesive such that the adhesive is spread to a portion on a front side with respect to the application area on the application surface, by moving the nozzle to a front side in the nozzle traveling direction with respect to a position in the application area at which feeding of the adhesive by the pump is finished.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: August 30, 2022
    Assignee: AISIN CORPORATION
    Inventors: Motoki Kori, Tetsuya Matsubara, Yosuke Miyazaki, Taisuke Nakamura
  • Patent number: 11401971
    Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: August 2, 2022
    Assignee: Ingersoll-Rand Industrial U.S., Inc.
    Inventors: Lauri Juhani Salmia, Petri J Mäki-Ontto, Esa H. M. Vikman
  • Patent number: 11355976
    Abstract: The present invention relates to a laminated stator stack for an electric machine comprising, a plurality of stator teeth and stator slots, for receiving at least one electrical conductor, at least one axial coolant duct, at least one outwards radial coolant duct and at least one inwards radial coolant duct, wherein the ducts are arranged internally in the laminated stator stack and interconnected to form a predominantly closed flow path, the outwards and inwards radial coolant ducts extent into the stator teeth, for cooling of the stator teeth, and the laminated stator stack comprises a plurality of lamination sheets.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: June 7, 2022
    Assignee: Vestas Wind Systems A/S
    Inventor: Peter Mongeau
  • Patent number: 11296564
    Abstract: A rotor of an electric machine, in particular an electric motor, having a rotor body, which circumferentially surrounds a shaft and includes a first sub-body and a second sub-body. The first sub-body and the second sub-body are joined together in the axial direction by means of an axle which extends in the axial direction and is offset radially to the outside with respect to the shaft. The first sub-body includes an eyelet, within which a socket receiving the axle is arranged, and the second sub-body includes a lug, which receives the axle. An electric machine, in particular an electric motor, is also provided.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: April 5, 2022
    Assignee: Baumueller Nuernberg GmbH
    Inventors: Frank Gutjahr, Paul Eisfeld
  • Patent number: 11271445
    Abstract: A method for fastening a magnet to a laminated core of a rotor for an electric motor includes providing the magnet and the laminated core, providing an adhesive tape, and winding the adhesive tape around the magnet to form a bondable magnet. The adhesive tape includes a backing tape formed by an open-pored nonwoven material, and an adhesive that coats only one side of the backing tape at room temperature and penetrates the open-pored nonwoven material and bonds to the laminated core of the rotor when a temperature of the adhesive is increased by at least 20° C. relative to room temperature. The laminated core may include a cavity for the bondable magnet, and the method may include the step of inserting or fitting the bondable magnet into the cavity. The bondable magnet may be inserted or fitted into the cavity without stress or mostly without stress.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: March 8, 2022
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Stephan Niese
  • Patent number: 11264853
    Abstract: An electric machine (10) comprises a stator (11), which comprises at least two slots (12) in which each at least one electrically conductive bar (13) is arranged, respectively. The stator (11) is adjacent to an air gap (14) and the at least two electrically conductive bars (13) form an electric winding (15) of the stator (11) and are arranged to be supplied with a corresponding electrical phase (n), respectively, by a power supply (16). Furthermore, the stator (11) is arranged in such a way that during operation of the electric machine (10) a stator magnetic field with at least two magnetic poles is formed in the air gap (14), where at least a first pole (22) has a circumferential extent along the air gap (14) which is different from the circumferential extent of at least a second pole (23).
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: March 1, 2022
    Assignee: MOLABO GmbH
    Inventors: Florian Bachheibl, Adrian Patzak
  • Patent number: 11196325
    Abstract: A stator for an electric machine having an annular lamination stack with a longitudinal axis and slots extending along the longitudinal axis, at least three electrical phases, each of which has two partial strands, a plurality of rings connected in series to form a partial strand, a plurality of connection wires arranged to form a ring in adjacent layers of the slots, and a power connection for electrically connecting the stator. The connection wires are connected by pairs at a contacting side of the lamination stack for connecting adjacent layers at contacting areas. The power connection is arranged at the contacting side, and the connection wires are closed in each instance at an opposed contacting side opposite the contacting side.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: December 7, 2021
    Assignee: ZF Friedrichshafen AG
    Inventors: Carsten Dotzel, Stefan Reuter, André Grübel, Matthias Ebert
  • Patent number: 11095173
    Abstract: A stator core of a rotary electric machine includes: an outer core that is an annular back yoke portion; and an inner core in which a plurality of teeth are radially arranged and inner side end portions of the teeth adjacent to each other in a circumferential direction are connected to each other in the circumferential direction by connection portions and which is fitted to an inner side of the outer core, each connection portion has a hole penetrating in an axial direction, each connection portion is split into a plurality of sections by the hole, a width in a radial direction of the one connection portion at a portion of the connection portion that has a smallest width in the radial direction is equal to or greater than ¼ and less than ½ of a sheet thickness of each of sheets.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: August 17, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koji Kawamura, Akira Hashimoto, Hiroyuki Akita, Sachiko Kawasaki, Naohiro Motoishi, Takatoshi Masuda
  • Patent number: 11050328
    Abstract: A manufacturing method of a rotor including: preparing a rotor core that is structured by stacking a plurality of electromagnetic steel plates in an axial direction and that has a magnet insertion hole which extends in the axial direction; inserting a permanent magnet in the magnet insertion hole; curing a resin provided between an inner surface of the magnet insertion hole and an outer surface of the permanent magnet while pressure is applied to the rotor core in the axial direction, after the permanent magnet is inserted in the magnet insertion hole; and welding the electromagnetic steel plates along the axial direction after curing the resin.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: June 29, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Hideharu Ushida, Takehiro Anai
  • Patent number: 10992213
    Abstract: A compressor includes: a stator core including a plurality of teeth around which an aluminum winding wire is wound in a concentrated manner; a rotor core disposed on an inner diameter side of the stator core and including a plurality of magnet insertion holes; and a plurality of ferrite magnets inserted in the magnet insertion holes, in which when a width of a winding wire portion formed in each of the teeth is represented as A, a length in an axis direction of the stator core is represented as L, and the number of slots is represented as S, the stator core has a shape that satisfies a relation of 0.3<S×A÷L<2.2.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 27, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuchika Tsuchida
  • Patent number: 10958112
    Abstract: Provided is a laminate of soft magnetic ribbons having a simple structure and capable of avoiding a damage of the soft magnetic ribbons and improving the occupancy of the soft magnetic ribbons. The laminate of soft magnetic ribbons includes: a laminated part of first soft magnetic ribbons stacked; and a reinforcing part disposed at both ends of the laminated part in the stacking direction of the first soft magnetic ribbons. The reinforcing part includes second soft magnetic ribbons stacked in the stacking direction of the first soft magnetic ribbons and hardening resin that covers the second soft magnetic ribbons as a whole and is impregnated into areas between the neighboring second soft magnetic ribbons.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: March 23, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Fumitaka Yoshinaga, Kazuaki Haga
  • Patent number: 10836148
    Abstract: Plate packs are produced from a sheet-like starting product (1), which is cut to form plates, which are stacked to form a plate pack. The plates within the plate stack are joined to one another by a bonding agent. The bonding agent used is a cyanoacrylate adhesive with a high temperature stability rating. It is applied to a wetting layer (14) for the adhesive. The wetting layer (14) is formulated to a pH in a region >7. The cyanoacrylate adhesive with a high temperature stability rating is able to spread on the wetting layer (14) such that effective wetting takes place, thus achieving quick and secure joining of the plates to one another.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 17, 2020
    Assignee: Kienle + Spiess GmbH
    Inventor: Björn Böker
  • Patent number: 10594179
    Abstract: The rotor includes ribs and permanent magnets mounted as spokes in pole pairs. A second wall of each rotor air gap of a plurality of rotor air gaps is parallel to an edge of a permanent magnet of the permanent magnets. A length of the second wall is less than 80% of a length of the edge. A fifth wall of each rotor air gap of the rotor air gaps is formed by a first side of a rib. Each pair of permanent magnets has an associated pair of rotor air gaps of the rotor air gaps. A first rotor air gap of each pair of rotor air gaps of the rotor air gaps is a mirror image of a second rotor air gap of each pair of rotor air gaps. Each pair of rotor air gaps is separated by an associated rib of the plurality of ribs.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: March 17, 2020
    Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: Wenbo Liu, Thomas A. Lipo
  • Patent number: 10320253
    Abstract: An armature coil includes a first portion, a second winding portion, a first winding end, a second winding end, and a crossover portion, and is continuously wound. The first winding portion is concentratedly wound in a counterclockwise winding direction with respect to a direction obtained in viewing a second end portion from a first end portion of a tooth, as it passes from the first winding end to the crossover portion. The second winding portion is concentratedly wound in a clockwise winding direction with respect to a direction obtained in viewing a second end portion from a first end portion of the tooth, as it passes from the crossover portion to the second winding end.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: June 11, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shin Nakamasu, Hiroki Fujita, Hirokazu Fujii, Ryou Fukui, Kouji Inoue, Junichi Satou
  • Patent number: 10236740
    Abstract: A stator of a motor comprises a terminal. The terminal includes: a leg portion, a hook portion including an open end and disposed on a core outer circumference part at a position corresponding to one of core tooth parts in a circumferential direction, and a coupling portion extending from the leg portion in the circumferential direction along the core outer circumference part and connected to the hook portion. An end portion of a coil is connected to the hook portion. The coupling portion of the terminal is bent to locate the hook portion radially outside the core tooth parts.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: March 19, 2019
    Assignee: MINEBEA MITSUMI INC.
    Inventor: Shuhei Kimpara
  • Patent number: 10135316
    Abstract: A stator assembly that provides a concentric housing and stator, the stator radially positioned inside the housing, the housing having an inner surface, the stator having an outer surface radially facing the inner surface. One of the outer surface of the stator and the inner surface of the housing has recessed shapes and the other one of the outer and inner surface has protruding shapes. When the two shapes are arranged in a first relative position, the protruding shapes are inserted in the recessed shapes so that the stator can be mounted radially inside the housing along a central axis of the assembly, and in a second relative position that is angularly shifted relative to the first position around the central axis, the protruding shapes exert, against the one of the housing and the stator that bears the recessed shapes, a radial force that angularly and axially locks the stator.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: November 20, 2018
    Assignee: SKF MAGNETIC MECHATRONICS
    Inventors: Eduardo Carrasco, Eddy Herisse
  • Patent number: 10109417
    Abstract: There is provided a laminated iron core including a plurality of piled iron core pieces, each piled iron core pieces being blanked from at least two piled sheet materials and sequentially laminated on other piled iron core pieces, wherein the piled iron core pieces adjacent in a direction of lamination are interlocked together by a plurality of caulking parts provided in each piled iron core pieces. Each of the plurality of caulking parts includes a caulking protrusion formed in one side and a caulking fitting groove formed in the other side to which the caulking protrusion is fitted, and the caulking protrusion is allowed to protrude to the caulking fitting groove of the piled iron core pieces adjacent thereto in the direction of lamination, and a width of the caulking protrusion is larger than an inner width of the caulking fitting groove.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: October 23, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Izumi Nakamura
  • Patent number: 9948161
    Abstract: A rotor assembly for an electric machine includes a rotor having an axis of rotation extending in an axial direction of the rotor and at least one first hole extending parallel to the axis of rotation and radially spaced from the axis of rotation by a first radial distance, and at least one first balancing element for compensating an unbalance of the rotor in rotation about the axis of rotation. The at least one first balancing element can be provided in the at least one first hole and can be fastened in the at least one first hole by means of a press fitting connection between the at least one first hole and the at least one first balancing element. Thus, a simple and economical possibility of balancing the rotor is provided.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: April 17, 2018
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Matti Radwainski
  • Patent number: 9837867
    Abstract: A rotor for connection to a rotating member for use in an electric machine is provided. The rotor includes a first member connected to the rotating member and generally positioned perpendicularly thereto and a second member connected to one of the rotating member and the first member.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: December 5, 2017
    Assignee: Regal Beloit America, Inc.
    Inventors: Subhash Marutirao Brahmavar, Greg Heins, Charles Richard Langford
  • Patent number: 9748815
    Abstract: A rotary compressor includes a casing, an electric motor, a compression mechanism and a balance weight mechanism. The electric motor includes a stator fixed to the casing, and a rotor. The compression mechanism is connected to the electric motor via a drive shaft. The balance weight mechanism is configured to cause centrifugal force to act on the drive shaft. The rotor includes a rotor core including a plurality of stacked electromagnetic steel sheets, and a rivet configured to clamp the rotor core at axial ends of the rotor core. The balance weight mechanism includes an insertion portion into which drive shaft is press fit, and a flat portion forming a flat surface at an axial end of the drive shaft. The balance weight mechanism is disposed at an axial end portion of the rotor to cover a head of the rivet.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: August 29, 2017
    Assignee: Daikin Industries, Ltd.
    Inventors: Kouichi Tanaka, Kazutaka Hori, Takashi Shimizu
  • Patent number: 9729035
    Abstract: A rotor of an electric machine is disclosed that resists expansion of the rotor components even at high rotational speed. The rotor includes first and second pluralities of laminations having slots to accept rotor bars. A support disk, also having slots, is placed between the laminations. The support disk, into which the rotor bars are slid, restrains the rotor bars from bending outwardly at high rotational speeds of the rotor. The rotor bars are further restrained at the ends by end rings, which have apertures into which ends of the rotor bars are placed. In some embodiments, containment rings are placed over axial extension of the end rings to prevent outward bowing at high speeds. In some embodiments, the rotor includes a stiffener sleeve to provide additional resistance to expansion during high rotational speeds.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: August 8, 2017
    Assignee: EcoMotors, Inc.
    Inventors: Will Robert Nielsen Hippen, Franz J. Laimboeck, Peter P. Hofbauer, Tyler R. Garrard
  • Patent number: 9692263
    Abstract: When a plurality of core plates are stacked and fixed to form a stator core for a rotary electric machine, fixation portions are set in accordance with the relative positional relationship with magnetic poles of a rotor to suppress torque fluctuations. The number of rotational buildup states which is a value obtained by dividing 360 degrees by a rotational buildup angle ?s by which the core plates are rotated in units of a predetermined number of plates to be stacked, the number of magnetic poles which is the number of magnetic poles M of the rotor, and the number of fixation portions which is the number of fixation portions 5 are set such that the number of fixation portions is an integer number of times the number of rotational buildup states and at least common divisors of the number of fixation portions and the number of magnetic poles include “1” only or “1” or “2” only.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: June 27, 2017
    Assignee: AISIN AW CO., LTD.
    Inventor: Yasuo Yamaguchi
  • Patent number: 9621008
    Abstract: A power generator has a power generation unit for generating electric power, a rotary unit and a power transmission unit. The power generation unit includes a stator having a stator core and a rotor disposed in the stator. The rotor has a rotor shaft and a driven gear disposed on the rotor shaft and is configured to be driven to rotate the rotor shaft. The rotary unit has a driving gear for undergoing rotational movement to rotate the rotor shaft via the driven gear to generate electric power. The power transmission unit has an intermediate gear for transmitting a rotational force of the driving gear of the rotary unit to the driven gear of the rotor shaft. The intermediate gear has at least one rotary shaft disposed inside of the stator core.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: April 11, 2017
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Makoto Suzuki, Fumiharu Iwasaki, Jun Shinohara, Shinji Kinoshia, Toru Ozaki, Norimasa Yanase
  • Patent number: 9548633
    Abstract: Provided is a stator of a motor which is capable of reducing an iron loss generated in a motor and thereby attaining a high-efficient motor. A stator of a motor comprises a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a narrower portion having a smaller width than a remaining portion of the extending portion.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: January 17, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takashi Ogawa, Yuichi Yoshikawa, Ikuo Ozaki, Toshiyuki Tamamura, Hirokazu Yamauchi
  • Patent number: 9502948
    Abstract: A method for producing stator pole teeth includes: arranging stator pole teeth to be wound in the form of a row, each of the stator pole teeth having at least one insulation body; winding one pole tooth or several pole teeth of the row of stator pole teeth; routing winding wire or winding wires out of a winding space in the pole teeth to the outside of the stator pole teeth into a laying space bounded on one side by insulation bodies of the pole teeth; and laying the winding wire or the winding wires in the laying space to connect individual pole teeth to one another. During laying of the winding wire or wires, the laying space is temporarily constricted such that the winding wires are forcibly automatically axially stacked in the laying space so as to avoid wire crossovers.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: November 22, 2016
    Assignee: Continental Automotive GmbH
    Inventor: Uwe Schein
  • Patent number: 9473001
    Abstract: A cooling structure for a brushless motor, which includes a stator, a rotor, and a motor shaft arranged integrally with the rotor. The stator includes a stator core including an inner circumferential surface, a cylindrical portion including first and second end surfaces adjacent to the inner circumferential surface, and teeth projecting from the inner circumferential surface. An insulator covers the inner circumferential surface, the first and second end surfaces, and the teeth. A coil is wound around each tooth that is covered by the insulator. The cooling structure includes a cooling fan coupled to one end of the motor shaft and arranged closer to the second end surface than the first end surface. At least one ventilation recess is arranged between two adjacent ones of the teeth in the circumferential direction in a portion of the insulator that covers the first end surface.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: October 18, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Hiroshi Matsumoto
  • Patent number: 9419479
    Abstract: An electric machine has a stator that comprises a plurality of laminations with teeth and cooling apertures about a central opening. When the laminations are stacked to form the stator core, the teeth of adjacent laminations cooperate to form slots disposed circumferentially about the central opening that are configured to receive a plurality of stator windings, and the cooling apertures angularly spaced about the central opening cooperate to form cooling manifolds that extend along a length of the stator core. A portion of the laminations has their cooling apertures offset from other laminations in the stack in a manner to create a plurality of flow paths transverse to the manifolds. The transverse flow paths extend angularly between laminations and adjacent manifolds. A header assembly directs flow into and out of the stator core.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 16, 2016
    Assignee: Baldor Electric Company
    Inventors: Boris A. Shoykhet, Andreas A. Meyer, Richard F. Schiferl, Qimin Dong, Michael Brinkmann
  • Patent number: 9372515
    Abstract: A chassis sub-assembly for computing devices includes a first heat sink plate and a second heat sink plate. The first heat sink plate includes a first plurality of perforations and the second heat sink plate includes a second plurality of perforations. The chassis sub-assembly also includes a first computing device and a second computing device. Each of the first and second computing devices is positioned between the first heat sink plate and the second heat sink plate. The first and second computing devices are in contact with both the first and second heat sink plates, and define a channel gap between the first and second computing devices. At least some of the first and second plurality of perforations are aligned with the channel gap. The first plurality of perforations, the channel gap, and the second plurality of perforations define an airflow channel.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 21, 2016
    Assignee: Evtron, Inc.
    Inventor: Andrew William Mayhall
  • Patent number: 9369018
    Abstract: A manufacturing method for manufacturing a rotating electrical machine equipped with a stator that includes a continuously wound coil unit achieved by continuously winding concentrated winding-type coils via cross wires, with coil wire having a rectangular section.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: June 14, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Tanaka, Takashi Ishigami
  • Patent number: 9362788
    Abstract: An electric machine has a stator that comprises a plurality of laminations with an outer periphery, and each of the laminations has teeth about a central opening such that when the laminations are stacked side-by side to form the stator core, the plurality of teeth of adjacent laminations cooperate to form slots disposed circumferentially about the central opening that are configured to receive a plurality of stator windings. Each of the laminations has a plurality of cooling apertures angularly spaced about the central opening. The cooling apertures of adjacent laminations cooperate to form cooling manifolds that extend along a length of the stator core. A portion of the laminations has their cooling apertures offset from other laminations in the stack in a manner to create a plurality of flow path transverse to the manifolds and angularly between laminations and adjacent manifolds.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 7, 2016
    Assignee: Baldor Electric Company
    Inventor: Boris A. Shoykhet
  • Patent number: 9306437
    Abstract: A method for producing a stator for an electrical machine as an internal rotor, in particular an electric motor. This method involves providing a multiplicity of separate pole teeth, which are wound. The ends of the winding wire of the pole teeth are connected to one another to create a flexible annular pole tooth assembly, and the flexible assembly is inserted into an injection mold and centered. The assembly located in the mold is encapsulated or sealed in a molding compound. In this way, a dimensionally stable stator with particularly good insulating properties can be produced.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: April 5, 2016
    Assignee: Continental Automotive GmbH
    Inventors: Rüdiger Brandau, Kurt Siebald
  • Publication number: 20150097461
    Abstract: A rotary electric machine may include a rotor that includes a laminated core arranged on a rotor shaft, wherein the rotor has at least one end-winding cover that encloses the laminated core in the axial direction of the rotor shaft, and the end-winding cover has an outer face, and a sensor track of a sensor is arranged on the outer face of the end-winding cover.
    Type: Application
    Filed: February 26, 2013
    Publication date: April 9, 2015
    Inventor: Michael Bulatow
  • Patent number: 8991035
    Abstract: A method of manufacturing a laminated core includes: preheating a rotor core body; attaching a cull plate onto a surface of the body removed from a preheating device; placing the body in a resin-sealing mold; heating and liquefying resin in resin reservoir pots by the mold; extruding the liquefied resin into plural magnet insertion holes and curing the resin; and ejecting a laminated rotor core from the mold and detaching the plate, wherein attaching the plate and detaching the plate are performed at a same station, and the plate detached is used as the plate at the attaching of the cull plate.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: March 31, 2015
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Hidemi Sasaki, Masayuki Okabe
  • Patent number: 8984742
    Abstract: A three dimensional soft magnetic metal mass suitable for milling is formed wrapping soft magnetic metal ribbon into a three dimensional shape and then applying adhesive to the three dimensional shape. The adhesive permeates the three dimensional shape. The adhesive is then cured. If the soft magnetic metal mass is made as a toroid, then it could be processed into an electromechanical component. The electro-mechanical component would then be suitable for use in very high frequency electric motors.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: March 24, 2015
    Assignee: Light Engineering, Inc.
    Inventors: Thomas J. Berwald, Kendall Scott Page
  • Patent number: 8981609
    Abstract: Disclosed is a generator for a wind energy installation having a rotor which has permanent magnets and is directly connected for drive purposes to a blade rotor of the wind energy installation, and having a stator which has an iron core composed of laminates. The generator is formed without the rotor or the stator on the external circumference as a completely surrounding housing, and the laminates of the stator are connected to one another by adhesive bonding and/or welding.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 17, 2015
    Assignee: Wind-Direct GmbH
    Inventor: Stephan Joeckel
  • Patent number: 8981615
    Abstract: A wound stator core disclosed is substantially formed from a spirally piled strip. In an embodiment, the strip with a specific length is formed with a first dentition and a second dentition, whereas the first dentition is featured by a first slot-number ratio and is composed of a first side and a plurality of first teeth in a manner that the plural first teeth are arranged as an array on the first side; which is also same to the second dentition while allowing the second slot-number ratio to be equal to the first slot-number ratio. In addition, each first tooth is formed with a first dental part at a free end thereof, while also each second tooth is formed with a second dental part at a free end thereof, and the first dental part of each first tooth is connected to the second dental part of its corresponding second tooth.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: March 17, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Cheng-Hsuan Lin, Wen-Yang Peng, Han-Ping Yang, Jung-Kang Peng
  • Patent number: 8975800
    Abstract: A rotor (100) for an electric motor (1000). The rotor (100) has a rotor shaft (10) and a rotor core (20) attached onto the rotor shaft (10). The rotor core has a plurality of core laminations (40, 140) arranged along an axis (A) of the rotor core (20), and has a plurality of poles of at least one pole pair, the core lamination (40, 140) having: a central recess (70, 170) through which the rotor shaft (10) passes and which has a contour (71, 171) as well as adjacent areas (AF), and a plurality of receiving structures arranged at peripheral angular positions in order to each form a receiving element for a pole-forming element on the rotor core (20).
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: March 10, 2015
    Assignee: Hilti Aktiengesellschaft
    Inventors: Reinhard Riedl, Jochen Erhardt
  • Patent number: 8963399
    Abstract: An induction machine short circuit stop is interposed between a brace and a machine component, such as a generator building bolt, in order to limit component motion during a short circuit event. The stop is a block of resilient non-conductive material that is oriented proximal the machine component at a desired spaced gap. Gap dimensions may be modified by use of different height stop blocks and/or shims. The stop is affixed to the brace by straps, cordage or fasteners, such as threaded studs. The stop is suitable for retrofitting existing induction machines in the field or in refurbishing service centers.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: February 24, 2015
    Assignee: Siemens Energy, Inc.
    Inventors: Avinash M. Tekawade, David F. Yurko, Domingo J. Fumero, Sean Woosley