Motor Or Part Encapsulated Patents (Class 264/272.2)
  • Patent number: 11374451
    Abstract: A rotor assembly is provided for an electric motor. The rotor assembly includes: a cylindrical magnet member having magnetization in both axial and radial directions, the magnet member being formed from a moldable magnetic material; and an output shaft receivable within the magnet member. An inner surface of the magnet member and an outer surface of the output shaft have complementarily-engagable interface elements thereon to prevent or limit dislocation of the magnet member and output shaft, and at least one of the interface elements is formed by overmolding of the magnet member and output shaft with the other of magnet member and output shaft.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: June 28, 2022
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yvan Bourqui, Daniel Soncini, Bruno Neuhaus
  • Patent number: 10998784
    Abstract: A motor suited for use in a direct drive laundry machine. The described motor has a stator core including an annular ring with an inner diameter between 120 mm and 250 mm, a radial width between 5 mm and 15 mm, and 24 or 27 stator poles projecting outward from the annular ring a distance of between 15 mm and 40 mm. Each stator pole is associated with one of three phase windings. A rotor for the motor has inwardly facing permanent magnet poles whereby the ratio of rotor poles to stator poles is 4:3.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: May 4, 2021
    Assignee: Fisher & Paykel Appliances Limited
    Inventors: Gerald David Duncan, Kerrin Edmund Burnnand, Gregory Paul Hill
  • Patent number: 10879748
    Abstract: A stator of a rotary electric machine comprises: a stator core including multiple slots; multiple coils formed using a winding wound in a distributed fashion so as to pass through the slots; and multiple power lines connected to the coils. The coils have a coil end projecting from an end surface of the stator core. The coils are adjacent to each other in the peripheral direction. A connection between each of the coils and a corresponding one of the power lines is arranged adjacent to a base portion of the coil end on the outer periphery. Each of the power lines starts from the connection to extend along the outer periphery of the coil end to be adjacent to the base portion of the coil end on the outer periphery while extending outwardly in the axis direction from between the coils adjacent to each other in the peripheral direction.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: December 29, 2020
    Assignee: FANUC CORPORATION
    Inventors: Daisuke Hayahi, Naoya Hidaka
  • Patent number: 10855151
    Abstract: A method of balancing a rotor and/or fixing rotor components includes arranging a plurality of generally like laminations side by side in a stack to form at least a part of a rotor. The rotor has a rotational center axis and each of the laminations having a plurality of apertures that cooperate to form passages that extend axially along a length of the stack. In accordance with an aspect of the method, a polymer based fixation material is filled in the passages in a manner to fix the laminations together in the stack. With the fixation material, a sprue is formed, projecting from an axial face of the stack. In accordance with another aspect of the method, a weight of the sprue is adjusted to rotationally balance the rotor about the rotor center axis.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: December 1, 2020
    Assignee: ABB Schweiz AG
    Inventors: Elio Alberto Perigo, Cherif Ghoul, Darren Tremelling, Sheng Zhong, Colin Tschida, Giulio Secondo
  • Patent number: 10811915
    Abstract: A rotor (10) for an electric motor has a force-transmission region (11) which is operatively connected to a motor shaft (12). A torque-transmission region (13) which is composed of fibre composite materials is adjacent to the force-transmission region (11). A magnetic connection region (14) and a region (15) for magnetic field guidance with magnets (16) are arranged on that side of the torque-transmission region (13) which is situated opposite the force-transmission region (11). The motor shaft can also be formed from fibre composite materials. Since the magnetic connection region (14) has a plastic which is provided with a magnetic or magnetizable filler, a rotor for an electric motor and also a motor shaft which interacts with said rotor which are of lightweight construction are provided, said rotor and motor shaft meeting the required performance criteria.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 20, 2020
    Assignee: ARBURG GMBH & CO KG
    Inventors: Werner Faulhaber, Eberhard Dufner, Jan-Peter Jastrzembski, Simon-Frederik Koch, Timo Müller, Marina Mrkonjic, Manuel Peter
  • Patent number: 10726983
    Abstract: A rare earth magnet capable of reducing an eddy current loss by virtue of a low-cost, simple configuration, when mounted in a motor, is to be provided. The rare earth magnet can include a magnet body that includes a rare earth element and iron; and a resistive layer formed on at least one surface of the magnet body, the resistive layer comprising a rare earth element, iron, and oxygen and having an average volume resistivity of 103 ?cm or more and a thickness of from 3 to 25 ?m.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: July 28, 2020
    Assignee: TDK CORPORATION
    Inventors: Jun Hagiwara, Fumitaka Baba, Makoto Iwasaki, Satoshi Koga
  • Patent number: 10612545
    Abstract: A gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a rotor driving the driving gear through a driving shaft, and a sealing member. The pump cylinder is located between the pump body and the sealing member. The driving gear is mounted to or integrally formed with the driving shaft. The open end of the sealing member extends out of the outer housing and is sealingly connected with the pump cylinder so as to form a cavity, and the rotor and the driving gear mounted on the driving shaft are received in the cavity and have a coaxiality with the stator.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: April 7, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Mohanlal Ramadoss, Wu Liu, Chi Hang Ngai
  • Patent number: 10581304
    Abstract: A stator manufacturing apparatus includes an insertion tool that is insertable into a stator core and being configured to dispose a pair of side parts of a stator coil in two holding grooves. A pressing tool has plate-like pushers arranged to correspond to the positions of the holding grooves. The pressing tool pushes out the side parts of the stator coils and inserts the side parts into the corresponding slots. A pair of shaping tools face coil end parts of the stator coils. A plurality of slits through which the pushers are insertable are provided in a principal surface of each shaping tool. A shaping tool moving unit shapes the coil end parts by pressing the pair of shaping tools in an axial direction with the pushers inserted in each of the corresponding holding grooves.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: March 3, 2020
    Assignee: NITTOKU CO., LTD.
    Inventor: Kenichi Muto
  • Patent number: 10478268
    Abstract: An electric motor that enables to promote a further downsizing and performance enhancement, and a dental device that includes the electric motor. A brushless slotless electric motor 10 includes: a stator 3 that includes a stator core 301 and a plurality of coils 31 to 33 disposed inside of the stator core 301; a rotor 2 that includes a shaft 21, the rotor 2 being rotated around the shaft 21 with respect to the stator 3; and a medium pathway 40 through which a medium passes, the medium being supplied for actualizing a function of a dental handpiece 9A to which the electric motor 10 is applied. The plurality of coils 31 to 33 are adjacent to each other in a rotation direction of the rotor 2 so as not to lap mutually. The medium pathway 40 is disposed between the adjacent coils 31 to 33.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: November 19, 2019
    Assignee: NAKANISHI INC.
    Inventor: Akito Nakamura
  • Patent number: 10250106
    Abstract: A stator which prevents deformation of component elements of the stator and which effectively removes heat generated by coils at the time of operation. The stator of a motor comprises a stator core having a cylindrical back yoke and teeth projecting out from the back yoke to the inside in the diametrical direction, coils wound around the teeth, an outer cylinder surrounding the back yoke, and heat conducting parts abutting against both an inner circumferential surface of the outer cylinder and coil ends of the coils.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: April 2, 2019
    Assignee: FANUC CORPORATION
    Inventor: Tatsuya Senoo
  • Patent number: 10243434
    Abstract: A stator of an electric motor includes a core and a covering overmolded on the core. The mold for overmolding the covering on the core includes first and second cavity-defining portions and pluralities of first and second pins extending at least generally toward opposite ones of the cavity-defining portions. The cavity is configured to receive the core therein. The first pins and the second pins are configured to extend into the cavity when the mold is in the closed position to cooperatively at least in part secure the core in the cavity.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: March 26, 2019
    Assignee: Nidec Motor Corporation
    Inventors: Michael W. Major, Matthew D. Allen
  • Patent number: 10211711
    Abstract: A rotor of an electric machine includes a plurality of permanent magnets arranged on an exterior of the rotor, and a bandage tape wound around the permanent magnets for fixing the permanent magnets in place. The bandage tape includes a first tape end, which is fastened to a surface of at least one permanent magnet, and a second tape end, which is an end of an outermost tape section of the bandage tape and is fastened to a tape section of the bandage tape disposed below the outermost tape section. The bandage tape is wound around the permanent magnets with a prestress such that in a region of each permanent magnet, at least one tape section of the bandage tape has a predeterminable minimum prestress.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: February 19, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rainer Eckert, Andreas Kraus
  • Patent number: 10090726
    Abstract: The motor includes a motor body to rotate a shaft by generating a rotating magnetic field; a bearing supporting the shaft; and a bracket being electrically non-conductive, surrounding an outer periphery of the bearing, and supporting the bearing, wherein the bracket is not in contact with any member formed of conductive material at an outer periphery of the bracket.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: October 2, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yukihiko Kawanori, Hironori Yabuuchi, Nobuaki Miyake, Kazuhiko Baba, Tomoki Hayashi
  • Patent number: 10020715
    Abstract: In a first aspect, a method is provided for manufacturing a permanent magnet module for a generator by using a mold with a resin inlet and a heating system for heating the inside of the mold. The method comprises placing inside the mold a module base with one or more receptacles for receiving permanent magnets, and inserting permanent magnets in the receptacles of the module base. The method further comprises closing the mold having in its inside the module base with inserted permanent magnets, and introducing resin into the closed mold through the inlet of the mold. The method still further comprises causing the heating system to operate for at least partially curing the resin. In a second aspect, permanent magnet modules are provided manufactured by performing any of the previous methods of manufacturing a permanent magnet module.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: July 10, 2018
    Assignee: GE Renewable Technologies Wind B.V.
    Inventors: Adrian Bueno De Santiago, César Muñiz Casais
  • Patent number: 9954410
    Abstract: The motor comprises a rotary unit, a stationary unit disposed around the rotary unit, and a bearing mechanism. The rotary unit comprises a plurality of magnets, a rotor core, a resin portion which covers the plurality of magnets and the rotor core. The rotor core comprises a ring-shaped inner core portion disposed at a radially inner side of the plurality of magnets, an outer core portion, and a plurality of connecting portions which radially connects the plurality of core elements, which are disposed between the plurality of magnets, and the inner core portion. The resin portion comprises an upper resin portion and a lower resin portion. The upper resin portion includes a plurality of gate holes.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: April 24, 2018
    Assignee: Nidec Corporation
    Inventor: Eiji Furutachi
  • Patent number: 9929628
    Abstract: A magnet insertion method into a rotor core is to insert an assembly into a magnet insertion hole provided in the rotor core of an electric motor, the assembly being formed by laminating a plurality of members, including at least a plurality of magnet pieces, in a line. According to this magnet insertion method, the assembly is formed by arranging a front member, having a surface surrounded by a chamfered ridge line, to cause the surface to be a front side end surface upon insertion, by laminating, on its rear side in an insertion direction, other members, without having the chamfered ridge line, in a line along the insertion direction to cause the other members to be hidden inside a projection of the front member when being projected from an insertion hole side, and by temporarily holding the front member and the other members.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: March 27, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takumi Ohshima, Kiyoshi Hasegawa, Takashi Sekikawa, Yasushi Matsushita, Akihisa Hori, Michito Kishi, Hiroaki Shibukawa
  • Patent number: 9843245
    Abstract: An apparatus is provided for winding a laminated core with a magnet coil for an electric motor in which a conductive, insulated coil wire is wound into one or multiple pole tip grooves of a winding surface of the laminated core. The apparatus comprises a holding device, a counter holding device, and one or multiple clamping elements. The holding device is configured to fix the laminated core to be wound during a winding process. The one or multiple clamping elements are configured to fix an insulating paper to one of the one or multiple pole tip grooves.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: December 12, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Brielmaier, Rainer Silberer, Gyoergy Mucsi, Juergen Hagedorn, Edmar Lopes, Heiko Wurster
  • Patent number: 9742230
    Abstract: A permanent magnet rotor including a rotor core and permanent magnets. The rotor core includes a plurality of magnetic induction blocks. A plurality of radial recesses are formed between every two adjacent magnetic induction blocks for mounting the permanent magnets. The magnetic induction blocks protrude at both sides of the opening of the radial recesses to form hook blocks. The permanent magnets include a first permanent magnet and a second permanent magnet. The first permanent magnet includes a north pole strong magnetic surface and a south pole weak magnetic surface. The second permanent magnet includes a north pole weak magnetic surface and a south pole strong magnetic surface. The first permanent magnet and the second permanent magnet are alternately disposed in the radial recesses.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: August 22, 2017
    Assignee: Zhongshan Broad-Ocean Motor Manufacturing Co., Ltd.
    Inventor: Mingpan Pan
  • Patent number: 9705375
    Abstract: A molded motor made by molding, with a thermosetting resin, a stator, which includes: a stator core formed by stacking magnetic steel plates; an insulation portion applied to the stator core; a winding applied to the insulation portion; and a power supply terminal. On an insulation inner wall provided on an inner diameter side of the insulation portion, a plurality of inner wall protrusions formed at axial ends of the insulation inner wall on a counter wire-connection side of the stator core and abutting on a die, used when the stator is molded, are provided in a circumferential direction of the stator core.
    Type: Grant
    Filed: September 2, 2013
    Date of Patent: July 11, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mineo Yamamoto, Mamoru Kawakubo, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 9634594
    Abstract: A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower using the ECM and determining if the resulting blower rotation is indicative of the desired direction of rotation for the blower.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: April 25, 2017
    Assignee: Regal Beloit America, Inc.
    Inventors: Stephen Solan, Jr., Brian L. Beifus, Roger C. Becerra
  • Patent number: 9564790
    Abstract: A method for manufacturing a laminated core, in which while a laminated core body 10 formed by caulking and with permanent magnets 20 inserted in a plurality of magnet insertion holes 17, 18 is held between a resin injection die 23 and a receiving die 22 opposed to each other, resin is injected into the magnet insertion holes 17, 18 from resin reservoir portions provided to the resin injection die 23 to fix the permanent magnets 20, the method comprising: at a time of resin injection, pressing a flat press surface 24 of the resin injection die 23 against caulking portions 13 protruding from a surface of the laminated core body 10 to apply pressure thereto, thereby allowing the surface of the laminated core body 10 whereon the caulking portions 13 are formed to be pressed against the flat press surface 24 so as to prevent resin leakage.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: February 7, 2017
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Akira Nagai, Jin Oda
  • Patent number: 9559573
    Abstract: A method of manufacturing a stator of an electric rotating machine is provided. The stator includes a plurality of teeth radially extended from a yoke portion formed by stacking steel sheets, a stator core having an insulating film on a surface of the teeth, and a winding portion including a plurality of layers of a power generating coil wound around each of the plurality of teeth. The method includes: a step of forming an insulating coating film by impregnating the power generating coil in a lower layer portion of the winding portion with a varnish using a liquid-type thermosetting resin, thereafter covering the power generating coil in a surface portion of the winding portion with a thermally meltable powder resin, and melt-bonding and thereafter curing the powder resin; and a step of curing the varnish that is performed simultaneously with the step of forming an insulating coating film.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: January 31, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Shinji Baba
  • Patent number: 9515532
    Abstract: A mold motor includes a mold stator, a rotor, and a bracket. The mold stator includes a first bearing housing section formed of thermosetting resin, one bearing of the rotor fitting in one end in an axial direction of the first bearing housing section, an opening section formed at an end on the opposite side of the bearing housing section, and a bracket press-fitting section formed near the opening section and having a diameter larger than a stator inner diameter. The bracket includes a bracket resin section configuring a second bearing housing section in which the other bearing of the rotor fits and a bracket sheet metal section press-fit into the bracket press-fitting section of the mold stator. In the bracket, the bracket resin section and the bracket sheet metal section are integrally molded.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: December 6, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mineo Yamamoto, Kazunori Sakanobe, Hiroyuki Ishii, Hiroki Aso, Kazuya Omura, Yasumasa Takeuchi, Katsumi Shibayama, Hitoshi Mochizuki
  • Patent number: 9364980
    Abstract: The present disclosure relates to a molding apparatus for fixing a magnet in a rotor core of a permanent magnet synchronous motor. The present disclosure provides a molding process for a rotor of a motor which can reduce manufacturing costs through alleviation of a tolerance of an introduced product and reduction of an error rate of a finished injection-molding product, by applying a lift core which may variably move in a mold during an insert injection molding process for molding a rotor and accordingly a new type of rotor molding method for a permanent magnet synchronous motor which prevents generation of a flash in an injection molding process even when the size and tolerance of the introduced product deteriorate as compared with a mold.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: June 14, 2016
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jae Young Kie, Jung Woo Lee, Kwang Keyong Sung
  • Patent number: 9178394
    Abstract: A rotor includes a laminated core, a plurality of magnets, and a resin portion. The laminated core includes a plurality of outer core portions arranged in a circumferential direction. The plurality of outer core portions and the plurality of magnets are alternately arranged in the circumferential direction. In addition, the outer core portion includes a through-hole that penetrates in an axial direction. The resin portion includes a columnar portion that is disposed inside the through-hole. Accordingly, the rigidity of the resin portion is enhanced. In addition, the resin portion includes a gate mark portion. At least a portion of the gate mark portion is positioned farther radially inward than the through-hole.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: November 3, 2015
    Assignee: Nidec Corporation
    Inventors: Kyohei Asahi, Kenichiro Hamagishi, Kuniaki Tanaka, Susumu Terada
  • Publication number: 20150145353
    Abstract: A manufacturing method of a stator is a method for manufacturing the stator using molds. The stator is constructed so that a stator main body and resin molded portion are integrated. The stator main body includes a terminal portion and a core. The manufacturing method includes: arranging the stator main body such that the terminal portion is located on a top portion of the molds; and filling a cavity with resin. The terminal portion has a gas discharging port configured to discharge gas out of the cavity from inside the cavity in the molds.
    Type: Application
    Filed: November 24, 2014
    Publication date: May 28, 2015
    Inventors: Masahiro KINO, Yukihisa YAMAMOTO, Masashige TANAKA
  • Publication number: 20150145351
    Abstract: The present invention relates to a method for potting a stator of an electric machine, including:—introducing an expandable, preferably elastically deformable, non-metallic shell in a non-expanded state into the stator,—expanding the shell,—pouring a resin around the shell, inside the stator,—retracting and removing the shell after the resin has set.
    Type: Application
    Filed: April 26, 2013
    Publication date: May 28, 2015
    Applicant: MOTEURS LEROY-SOMER
    Inventors: Sébastien Porcher, Haikel Gherairi, Stéphane Dufau
  • Patent number: 9028736
    Abstract: An apparatus for fabricating a semiconductor package may include a mold and a molding plate. The mold may define a mold cavity with the mold being configured to receive a circuit board in the mold cavity, and the circuit board may include a semiconductor chip mounted thereon. A molding plate may be moveable in the mold cavity with the molding plate being configured to adjust a volume of the mold cavity. Related methods are also discussed.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: May 12, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Youngshin Choi, Kikwon Jeong
  • Publication number: 20150048914
    Abstract: In an ignition coil, a housing has an inner chamber, and a transformer is installed in the inner chamber of the housing. A molded side-core assembly of a transformer includes an arched side core magnetically coupled to first and second ends of a longitudinal center core and located outside a circumferential part of primary and secondary windings. The molded side-core assembly includes an insulation cover molded to cover at least part of the arched side core. The insulation cover has a surface and at least one molding mark formed on the surface thereof. An insulation filler is filled in the inner chamber of the housing while the at least part of the arched side core is exposed from the insulation filler and the at least one molding mark is hermetically sealed in the insulation filler.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 19, 2015
    Inventor: Yoshitaka SATOH
  • Publication number: 20140373658
    Abstract: A gear box includes a gear box body of a reducer to which a motor is mounted. The gear box body includes a worm, wheel holding section where a worm wheel of the reducer is held, and a motor holding section, where a part of the motor is contained, the motor holding section having a motor mounting opening. The motor holding section is configured such that a bottom of the motor holding section is provided in a region between a line L1 and a line L2. Here, the line L1 passes through the center C of the worm wheel holding section and is perpendicular to the axis line X of a motor shaft. The line L2 is a tangent line passing through an outer edge portion located near a circular outer peripheral wall of the worm wheel holding section on a motor side and is perpendicular to the axis line X of the motor shaft.
    Type: Application
    Filed: June 18, 2014
    Publication date: December 25, 2014
    Inventors: Takashi Tamaki, Satoshi Kikuchi
  • Publication number: 20140339929
    Abstract: The invention relates to a laminated core, preferably a stator laminated core or a rotor laminated core (2), of an electric machine, in particular an electric fuel pump of a motor vehicle. The laminated core comprises slots (6), each of which has a slot insulation (7), and winding wires of at least one electric winding (10), said wires running in the slots (6). A plastic encapsulation (17) encases the laminated core together with the winding wires which run in the slots (6) at least in some regions. The plastic encapsulation (17) and the slot insulation (7) each consist of a thermoplastic, and the plastic of the slot insulation (7) has a melting point which is equal to, similar to, or lower than the melting point of the plastic of the plastic encapsulation (17) such that the encapsulation process causes the slot insulation (7) to melt, thereby bonding the slot insulation (7) to the plastic encapsulation (17). The invention further relates to a method for producing a laminated core and to an electric machine.
    Type: Application
    Filed: December 27, 2012
    Publication date: November 20, 2014
    Inventors: Oliver Himmel, Ursula Stucke, Joost Nowak, Ingo Buchholz, Alexis Spinner
  • Publication number: 20140319841
    Abstract: A waste heat utilization system including a generator configured to receive a flow of an organic working fluid and a method of manufacturing the generator component is provided. The method includes preheating the generator component. The method also includes applying a varnish or an encapsulating layer to the generator component. The method further includes baking the generator component with the varnish applied thereto. The method yet further includes cooling the generator component.
    Type: Application
    Filed: July 8, 2014
    Publication date: October 30, 2014
    Inventors: James Jun Xu, Eric Joseph Blumber, Albert Andreas Scharl
  • Patent number: 8869379
    Abstract: A method of producing a rotor includes crimping and stacking a plurality of core pieces through crimping connecting portions to form a rotor stacked core having a magnet-insertion hole and inserting a permanent-magnet pieces into the magnet-insertion hole. Further, the method also includes clamping the rotor stacked core between an upper die and a lower die, and filling a resin into the magnet-insertion hole from a resin reservoir pot which is formed in the upper die or the lower die. Also, the resin may be filled into the magnet-insertion hole while placing the crimping connecting portions at a center of the resin reservoir pot.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: October 28, 2014
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Hirotoshi Mabu, Kohei Yoshida
  • Publication number: 20140151926
    Abstract: A laminated rotor core (36) wherein permanent magnets (47) are inserted in respective magnet insertion holes (46) is disposed between and pressed by an upper die (37) and a lower die (29). The upper die (37) has resin reservoir pots (50) provided above the laminated rotor core (36) and at positions corresponding to the respective magnet insertion holes (46). Raw resin material put in the resin reservoir pots (50) is heated by the upper die (37). Subsequently, the resin material in a liquefied state is ejected from the resin reservoir pots (50) by plungers (52) that are inserted and moves vertically in the resin reservoir pots (50) and is directly filled in the magnet insertion holes (46). Consequently, the respective magnet insertion holes (46) are filled with the resin material more evenly and highly reliable products can be supplied at low cost.
    Type: Application
    Filed: February 4, 2014
    Publication date: June 5, 2014
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Satoshi Matsubayashi, Hirotoshi Mabu, Katsumi Amano, Atsushi Shiraishi
  • Patent number: 8728375
    Abstract: A laminated rotor core (36) wherein permanent magnets (47) are inserted in respective magnet insertion holes (46) is disposed between and pressed by an upper die (37) and a lower die (29). The upper die (37) has resin reservoir pots (50) provided above the laminated rotor core (36) and at positions corresponding to the respective magnet insertion holes (46). Raw resin material put in the resin reservoir pots (50) is heated by the upper die (37). Subsequently, the resin material in a liquefied state is ejected from the resin reservoir pots (50) by plungers (52) that are inserted and moves vertically in the resin reservoir pots (50) and is directly filled in the magnet insertion holes (46). Consequently, the respective magnet insertion holes (46) are filled with the resin material more evenly and highly reliable products can be supplied at low cost.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: May 20, 2014
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Satoshi Matsubayashi, Hirotoshi Mabu, Katsumi Amano, Atsushi Shiraishi
  • Publication number: 20140124980
    Abstract: A method for manufacturing a laminated core, in which while a laminated core body 10 formed by caulking and with permanent magnets 20 inserted in a plurality of magnet insertion holes 17, 18 is held between a resin injection die 23 and a receiving die 22 opposed to each other, resin is injected into the magnet insertion holes 17, 18 from resin reservoir portions provided to the resin injection die 23 to fix the permanent magnets 20, the method comprising: at a time of resin injection, pressing a flat press surface 24 of the resin injection die 23 against caulking portions 13 protruding from a surface of the laminated core body 10 to apply pressure thereto, thereby allowing the surface of the laminated core body 10 whereon the caulking portions 13 are formed to be pressed against the flat press surface 24 so as to prevent resin leakage.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 8, 2014
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Akira Nagai, Jin Oda
  • Publication number: 20140042834
    Abstract: A rotor includes a laminated core, a plurality of magnets, and a resin portion. The laminated core includes a plurality of outer core portions arranged in a circumferential direction. The plurality of outer core portions and the plurality of magnets are alternately arranged in the circumferential direction. In addition, the outer core portion includes a through-hole that penetrates in an axial direction. The resin portion includes a columnar portion that is disposed inside the through-hole. Accordingly, the rigidity of the resin portion is enhanced. In addition, the resin portion includes a gate mark portion. At least a portion of the gate mark portion is positioned farther radially inward than the through-hole.
    Type: Application
    Filed: January 7, 2013
    Publication date: February 13, 2014
    Applicant: NIDEC CORPORATION
    Inventors: Kyohei ASAHI, Kenichiro HAMAGISHI, Kuniaki TANAKA, Susumu TERADA
  • Patent number: 8647110
    Abstract: An apparatus for fabricating a semiconductor package may include a mold and a molding plate. The mold may define a mold cavity with the mold being configured to receive a circuit board in the mold cavity, and the circuit board may include a semiconductor chip mounted thereon. A molding plate may be moveable in the mold cavity with the molding plate being configured to adjust a volume of the mold cavity. Related methods are also discussed.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: February 11, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Youngshin Choi, Kikwon Jeong
  • Patent number: 8623254
    Abstract: A method for producing a magnetic field sensor for use in drive train of a motor vehicle includes encapsulating an electrical assembly and an end of a connecting cable via injection molding and integrally extruding a fastening tab. After a first injection step in which the electrical assembly and the connecting cable are encapsulated in a core-type first molded part, a second injection molding step in implemented in which a fastening tab is integrally formed via injection molding on the core-type insertion part in a specifiable longitudinal and/or angular position. The core-like insertion part is held in the injection mold in a longitudinally displaceable and/or rotatable manner.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: January 7, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Rolf Goetz, Steffen Schulze, Daniel Matthie, Markus Kny, Frank Weishaeutel
  • Patent number: 8623263
    Abstract: A process for curing a porous muffler preform defined by a plurality of glass fibers and a heat-curing thermoset or thermoplastic materials applied to the plurality of glass fibers is disclosed herein. The process includes the step of enclosing the muffler preform in a chamber. The process also includes the step of surrounding the muffler preform with steam. The process also includes the step of causing steam to enter the muffler preform from multiple directions.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: January 7, 2014
    Assignee: OCV Intellectual Capital, LLC
    Inventors: Norman T. Huff, Janakikodandaram Karra
  • Publication number: 20130307353
    Abstract: A magnet-type power generator includes a rotor having a bowl-shaped flywheel and plural magnets disposed on an inner circumferential surface of the flywheel so as to be spaced at a predetermined interval, and a stator having plural cores facing the magnets and each having a coil wound therearound. The magnets include a bonded magnet integrally molded with the flywheel.
    Type: Application
    Filed: September 13, 2012
    Publication date: November 21, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Toshio MAEKAWA
  • Patent number: 8551384
    Abstract: A permanent-magnet rotor for external-rotor electric motor (1) particularly for washing machines of unusual silence comprising a cup-shaped support structure (6) having a bottom (7) and a side wall (10) and a plurality of magnetic poles (12) arranged in the support structure (6) and arranged along said side wall (10), with elastomeric material interposed between said magnetic poles (12) which forms with them a massive structure (14) of uniform thickness.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: October 8, 2013
    Assignee: Askoll Holding S.r.l.
    Inventor: Elio Marioni
  • Patent number: 8479378
    Abstract: Method of manufacturing a stator core includes stacking a plurality of substantially T-shaped teeth obtained from a jigsaw pattern of said teeth into a plurality of stacks. In each said stack, said teeth are substantially aligned with each other. Said method includes winding said stacks with a plurality of windings and placing said stacks along the perimeter of a polygonal outer surface of a ferromagnetic tube having an inner channel. Each side of said outer surface corresponds to each said stack and contacts the bases of said legs of each said stack. Said method includes inserting said stacks and said tube into an inner space defined by an annular inner surface of a mold and a shaft into said channel. Said stacks are stationed along the circumference of said inner surface. Said method includes vacuum encapsulating said inner space in epoxy resin and removing said mold and shaft.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: July 9, 2013
    Inventor: John Pairaktaridis
  • Patent number: 8347485
    Abstract: A procedure for centrifugally casting a shorted structure around induction motor rotors is described. The method is commonly applied to a plurality of rotors disposed and arranged for rotational balance and supported on a suitable support, or optionally, on a plurality of supports arranged in layered fashion about a common rotational axis. The method comprises forming a wax representation of the shorted structure around a lamination stack; mounting a plurality of such lamination stacks in a mounting fixture and-attaching a suitable gating and runner system; forming an investment by coating the structure with refractory followed by melting out the wax; casting molten metal into the investment while it is rotating and aligning the mold to allow the centrifugal force generated to promote mold filling; and, continuing to rotate the investment until solidification is substantially complete.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: January 8, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Scott W. Biederman, Mark A. Osborne, Michael J. Walker, Thomas A. Perry
  • Patent number: 8333007
    Abstract: A fuel pump includes a pump portion for pumping fuel. The fuel pump further includes a magnet having magnetic poles circumferentially alternate with each other. The fuel pump further includes an armature on a radially inside of the magnet. The armature includes a rotor core provided with a coil formed of a wire. The armature is rotatable for driving the pump portion. A commutator, which is in a substantially disc shape, is provided to an axial end of the armature for rectifying electricity supplying to the coil. The rotor core has an axial end having an outer circumferential periphery defining a commutator-side collar portion extending toward the commutator. The coil is formed by winding the wire between an outer circumferential periphery of the commutator and the commutator-side collar portion.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: December 18, 2012
    Assignee: Denso Corporation
    Inventors: Kiyonori Moroto, Akira Kuroyanagi, Tadashi Hazama
  • Patent number: 8268219
    Abstract: A laminated rotor core (36) wherein permanent magnets (47) are inserted in respective magnet insertion holes (46) is disposed between and pressed by an upper die (37) and a lower die (29). The upper die (37) has resin reservoir pots (50) provided above the laminated rotor core (36) and at positions corresponding to the respective magnet insertion holes (46). Raw resin material put in the resin reservoir pots (50) is heated by the upper die (37). Subsequently, the resin material in a liquefied state is ejected from the resin reservoir pots (50) by plungers (52) that are inserted and moves vertically in the resin reservoir pots (50) and is directly filled in the magnet insertion holes (46). Consequently, the respective magnet insertion holes (46) are filled with the resin material more evenly and highly reliable products can be supplied at low cost.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: September 18, 2012
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Satoshi Matsubayashi, Hirotoshi Mabu, Katsumi Amano, Atsushi Shiraishi
  • Patent number: 8262971
    Abstract: A method for centralising and retaining a molded end coil (20) in a magnet former (12) which includes an oversleeve (24) for retaining the end coil in position, the radially outer (A2) surface of the end coil being of lesser diameter than the radially inner surface of the oversleeve.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: September 11, 2012
    Assignee: Siemens Plc
    Inventor: Simon James Calvert
  • Patent number: 8217539
    Abstract: An electric motor comprising an annular stator core, a resin molding the stator core, a casing member housing the stator core, wherein the casing member has an opening, and the resin is filled into the opening.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: July 10, 2012
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tetsuji Ueta, Hiroaki Sagara, Takeshi Nagao, Takashi Uchino, Kenji Taguchi
  • Patent number: 8107190
    Abstract: Provided is a fluid bearing device with a hub part having high molding precision and dimensional stability and capable of being produced at low cost. An annular gate (14) is formed at a portion of a cavity (15) corresponding to an outer peripheral edge portion of a lower end surface (10c1) of a flange part (10c), and a molten resin (P) is filled into the cavity (15) through the annular gate (14) to form a hub part (10) made of resin. The hub part (10) molded by the injection molding exhibits a radial resin orientation through an entire periphery thereof. Further, an annular gate trace (16) is formed at the outer peripheral edge portion of the lower end surface (10c1) of the flange part (10c) of the hub part (10).
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: January 31, 2012
    Assignee: NTN Corporation
    Inventors: Kenji Ito, Fuyuki Ito
  • Patent number: 8075825
    Abstract: A split stator is arranged such that a formed edgewise coil is mounted on a teeth of a split stator core through an insulator, and a resin molded portion is formed excepting long ends of the edgewise coil.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: December 13, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideaki Takahashi, Takaaki Kiyono, Koji Nakanishi