Commutators Patents (Class 310/233)
  • Patent number: 12273000
    Abstract: A multi-phase armature winding is made up of winding segments. Each of the winding segments includes a pair of straight sections extending straight in an axial direction of the armature winding and connecting sections which are located on axially opposed end sides of the armature winding. The connecting sections are bent and connect the straight sections together in a circumferential direction of the armature winding. The winding segment is produced by winding a conductor wire member a plurality of times. The conductor wire member is made of a bundle of wires. Each of the straight sections occupies the whole of a coil side and portions of coil ends of the winding segment. Each of the straight sections has holding portions arranged at least in coil end portions thereof. The holding portions work to tighten the wires together.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: April 8, 2025
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 12249884
    Abstract: The invention relates to a stator (1) which may be used within an electric rotating machine, an apparatus for preparing pre-shaped insulators and a method for preparing a pre-shaped insulator. The stator (1) comprises a stator core (10) which has a plurality of axially extending slots (11) arranged in a circumferential direction (C) of the stator core (10) and at least two conductors (20, 21) arranged along a radial direction (R) of the same slot (11). Each conductor (20, 21) is peripherally wrapped by an individual insulator (30) which extends around the outer circumference (22) of the conductor (20, 21), such that in circumferential direction the insulator (30) comprises a one-layer-section (37) and an overlapping section (31) which extend along the complete axial length (29) of the insulator (30).
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: March 11, 2025
    Assignee: ATOP S.p.A.
    Inventors: Massimo Ponzio, Giovanni Manuelli
  • Patent number: 12206292
    Abstract: A method of cooling a set of rotor winding end turns of a rotor assembly can include directing a fluid coolant flow to a coil support assembly, delivering the fluid coolant flow, by a first coolant distribution ring of the coil support assembly, radially outward toward rotor winding end turns; and delivering the fluid coolant flow, by a coil support disc of the coil support assembly, axially outward toward the rotor winding end turns. The method can further include expelling fluid coolant flow by a second coolant distribution ring radially outward toward a set of stator windings, and expelling, by the coil support disc, the fluid coolant flow axially outward toward the rotor core.
    Type: Grant
    Filed: January 28, 2022
    Date of Patent: January 21, 2025
    Assignee: GE AVIATION SYSTEMS LLC
    Inventors: Balamurugan Sridharan, Anirban Chatterjee, Ami Hatim
  • Patent number: 11909263
    Abstract: One example device includes a rotor platform that rotates about an axis of rotation. The device also includes a rotor coil comprising a first plurality of conductive loops disposed along a planar mounting surface of the rotor platform. The device also includes a stator platform and a stator coil comprising a second plurality of conductive loops disposed along a planar mounting surface of the stator platform. The rotor coil and the stator coil are coaxially arranged about the axis of rotation. The stator coil remains within a first predetermined distance to the rotor coil in response to rotation of the rotor platform. The device also includes a magnetic core extending along the axis of rotation and through the stator coil. The magnetic core remains within a second predetermined distance to the stator coil in response to rotation of the rotor platform.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: February 20, 2024
    Assignee: Waymo LLC
    Inventor: Paul Karplus
  • Patent number: 11888360
    Abstract: A brush motor includes: a rotor core provided in a rotor; s teeth provided in the rotor core; s concentrated-winding coils with electric wires being respectively wound around the teeth; a commutator provided on the rotor in a relatively non-rotatable manner; c commutator pieces provided in the commutator and connected to the coils; p pairs of magnet magnetic poles provided on a stator and arranged to face the teeth; and a brush that is brought into sliding contact with the commutator pieces to supply a current to the coils, in which 0.5<p/s<1 and s<c.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: January 30, 2024
    Assignee: MABUCHI MOTOR CO., LTD.
    Inventor: Tadayuki Wakita
  • Patent number: 11742730
    Abstract: A motor includes a commutator, a bracket including a conductive brush, first and second wall parts, and first and second deformable parts. The conductive brush is in contact with the commutator. The first wall part includes a first surface extending along a first surface of the conductive brush. The second wall part includes a second surface extending along a second surface of the conductive brush located on a side opposite the first surface of the conductive brush. The first deformable part is in contact with both the first surface of the conductive brush and the first surface of the first wall part, and is deformable in response to movement of the conductive brush. The second deformable part is in contact with both the second surface of the conductive brush and the second surface of the second wall part, and is deformable in response to movement of the conductive brush.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: August 29, 2023
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Koichiro Hirabayashi, Akiko Ikuta, Yukimasa Matsumura, Kazuaki Sato, Minoru Kuroda, Bora In
  • Patent number: 11502584
    Abstract: A rotor for a rotating electric machine includes a rotor winding arranged for conjoint rotation on a rotor shaft, and a slip ring body arranged on an axial end of the rotor shaft and having an end face on an axial end of the slip ring body opposite to the rotor winding. The slip ring body includes connection adapters which project axially beyond the end face of the slip ring body for connection of line ends of the rotor winding. A driver unit for a rotary encoder is fastened to the end face of the slip ring body and/or to the axial end of the rotor shaft and electrically insulated from the connection adapters. A centrifugal force support ring is arranged on the end face of the slip ring body such that the connection adapters and the driver unit are arranged in a through-opening of the centrifugal force support ring.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: November 15, 2022
    Assignee: FLENDER GMBH
    Inventors: Herbert Binder, Helmut Ecker, Robert Gruber, Oliver Memminger, Klaus Schifferer
  • Patent number: 11411456
    Abstract: A motor includes an armature including a commutator, a bracket including a conductive brush and a first wall part, and a first deformable part. The conductive brush is in contact with the commutator. The first wall part includes a first surface extending along a first surface of the conductive brush. The first deformable part is in contact with both the first surface of the conductive brush and the first surface of the first wall part. The first deformable part is deformable in response to movement of the conductive brush.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: August 9, 2022
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Koichiro Hirabayashi, Yukimasa Matsumura, Akiko Ikuta, Minoru Kuroda, Bora In, Kazuaki Sato
  • Patent number: 11362561
    Abstract: A stator wherein the lead wire portion includes a root portion connected to the slot housed portion, disposed in a same-phase region which overlaps the coil end portion of the coil of a same phase as seen in the center axis direction, and disposed on an axially inner side with respect to the coil end portion, and a draw-out portion that projects in the center axis direction from a power source portion-side end portion of the root portion toward an axially outer side with respect to the coil end portion in the same-phase region.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: June 14, 2022
    Assignees: AISIN CORPORATION, HAYASHI KOGYOSYO CO., LTD.
    Inventors: Toru Kuroyanagi, Takahiko Hobo, Hiroo Hayashi, Ko Kajita
  • Patent number: 11139724
    Abstract: A brushed motor includes a rotation shaft, a commutator including a plurality of segments separated by a plurality of undercuts arranged at unequal intervals, an armature, a plurality of permanent magnets, a voltage equalizing line, a positive electrode brush, and a negative electrode brush. When Pz is the number of the permanent magnets and N is the number of the segments, a relationship of N=Pz(K?0.5) is satisfied. Pz is an even number that is greater than or equal to four. K is a constant and is a natural number that is greater than or equal to two. The plurality of undercuts includes at least one set of undercuts arranged at an undercut interval that differs from a reference angle ?z. The reference angle ?z is specified by a relational expression of ?z=(360 degrees/Pz)±(360 degrees/2N).
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: October 5, 2021
    Assignee: Denso Corporation
    Inventors: Tetsuaki Ichikawa, Toshio Yamamoto, Masayuki Kuwano
  • Patent number: 10879774
    Abstract: An electric power steering system and its brush motor are disclosed. The brush motor includes a stator and a rotor rotatably mounted to the stator. The rotor includes a rotary shaft, a commutator and a rotor core fixed to the rotary shaft, and a rotor winding wound around the rotor core. The commutator includes a plurality of commutator segments. The rotor core includes a plurality of teeth. The rotor winding includes a plurality of winding elements. Adjacent teeth define therebetween wire slots for receiving the winding elements. The winding elements include a plurality of first winding elements and a plurality of second winding elements. The first winding elements are connected in series through the commutator segments. The second winding elements are connected in series through the commutator segments. The first winding elements and the second winding elements are received in different wire slots. Implementation of the present invention can improve the reliability of the product.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: December 29, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Rui Feng Qin, Fei Liu
  • Patent number: 10855149
    Abstract: A starter includes a motor configured with a direct current motor. The direct current motor has a brush and a commutator. The brush is a sintered material formed of graphite and a copper powder. The commutator is formed of either copper or a copper alloy that has a copper content of 99% or more. A surface of is a sliding portion of the commutator which has sliding movement with the brush is provided with a graphite cover-layer that contains graphite as a main component. The graphite cover-layer contains a hard compound which has a Vickers hardness higher than 10 GPa and a metal sulfide solid lubricant.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: December 1, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takashi Hirabayashi, Taro Fukuda
  • Patent number: 10840780
    Abstract: The present invention provides a stator including magnets having six poles; a rotor disposed inside the stator and including thirteen slots; a coil wound around the slot; a rotary shaft coupled to the rotor; a commutator coupled to the rotary shaft and connected to the coil; and a plurality of brushes disposed to be pressed against the commutator and located to have an angular interval of 63° to 66° in the circumferential direction of the rotary shaft, thereby providing advantageous effects in that a current ripple is minimized and a torque is maximized.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 17, 2020
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Jae Young Kim, Hong Hyoun Kim
  • Patent number: 10707729
    Abstract: The present invention is a structure of an electrical connection portion formed by thermal bonding of a terminal 53 of a current-carrying component 50 of a motor and a winding wire 30. The terminal 53 includes a lock portion 53a positioned on a base end side and a fusion portion 53b positioned on a distal end side. The winding wire 30 includes a binding portion 31 wound around the lock portion 53a and has a one end portion 36 coupled to a molten ball 55 generated at the fusion portion 53b; and a coupling wire portion 33 tightly stretched from a main winding wire portion 34 of the motor disposed in a wound state and continuous to the other end portion of the binding portion 31. The one end portion 36 of the binding portion 31 is in a state where tension pulling the coupling wire portion 33 to the main winding wire portion 34 side does not act.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: July 7, 2020
    Assignee: MABUCHI MOTOR CO., LTD.
    Inventors: Shou Nakayama, Yoshiaki Maeda, Takeshi Hirano, Kenji Muneda, Keishirou Maki
  • Patent number: 10523080
    Abstract: A power tool includes a motor having a stator assembly and a rotor pivotably arranged inside the stator. The stator assembly includes a lamination stack defining a plurality of poles; a plurality of field windings each arranged at at least two opposite poles of said plurality of poles and connected together around the stator assembly; and a plurality of conductive terminals longitudinally arranged along an outer surface of the lamination stack and electrically coupled to the plurality of field windings and a power source.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: December 31, 2019
    Assignee: Black & Decker Inc.
    Inventors: David J. Smith, Justin H. Ayers, David E. Gillespie, Eric E. Hatfield, Earl M. Ortt, Stephen Osborne, Brian Friedman, Jarrett A. Dunston
  • Patent number: 10418769
    Abstract: Commutator of the present invention includes electrically conductive part, resin part, ceramic part, first mixing part and second mixing part. First mixing part contains an electrically conductive material and a ceramic material in mixture. In first mixing part, a content of the electrically conductive material decreases and a content of the ceramic material increases from electrically conductive part toward ceramic part. Second mixing part contains the ceramic material and the resin material in mixture. In second mixing part, a content of the ceramic material decreases and a content of the resin material increases from ceramic part toward resin part.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: September 17, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Keisaku Nakano, Kenji Kondo
  • Patent number: 10348169
    Abstract: A brushed motor includes a rotation shaft, a commutator including a plurality of segments separated by a plurality of undercuts arranged at unequal intervals, an armature, a plurality of permanent magnets, a voltage equalizing line, a positive electrode brush, and a negative electrode brush. When Pz is the number of the permanent magnets and N is the number of the segments, a relationship of N=Pz(K?0.5) is satisfied. Pz is an even number that is greater than or equal to four. K is a constant and is a natural number that is greater than or equal to two. The plurality of undercuts includes at least one set of undercuts arranged at an undercut interval that differs from a reference angle ?z. The reference angle ?z is specified by a relational expression of ?z=(360 degrees/Pz)±(360 degrees/2N).
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: July 9, 2019
    Assignee: Denso Corporation
    Inventors: Tetsuaki Ichikawa, Toshio Yamamoto, Masayuki Kuwano
  • Patent number: 10270310
    Abstract: To provide a motor with a wiring board achieving simplification of work and having low probability of contact failure. In a motor with a wiring board provided herein, the wiring board is attached to a stator with multiple wound coils. The wiring board comprises: a circuit board attached to the stator; and multiple crimp terminals arranged on an end face of the circuit board and allowing crimping of ends of the coils. The wiring board (5) is configured in such a manner that the ends extending along the end face of the circuit board are crimped on the crimp terminals, and the crimped ends can be bent to postures along a surface of the circuit board.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: April 23, 2019
    Assignee: FANUC CORPORATION
    Inventors: Koutarou Yamada, Takeshi Tamaki, Kouji Kobayashi
  • Patent number: 10205293
    Abstract: The invention relates to a commutator, comprising an insulating base and a plurality of commutator segments arranged on the insulating base, wherein each commutator segment comprises a metal layer, a transition layer and a graphite layer arranged on the base in sequence. The transition layer contains a material identical to that of the graphite layer and a material identical to that of the metal layer. The invention further relates to a motor comprising the commutator and a method for manufacturing the commutator. As the transition layer contains the material identical to that of the graphite layer and the metal layer, the problem that the graphite layer and the metal layer are cracked during high temperature sintering is resolved. The service life of the commutator is prolonged. The method for manufacturing the commutator reduces chemical contamination and production cost caused by electroplating and brazing used in a traditional technology.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: February 12, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Jing Chao Zheng, Chi Man Law, Xiu Xian Wang
  • Patent number: 10186937
    Abstract: A commutator includes a cylindrical insulator and commutator pieces, which are formed on the outer circumferential surface of the insulator and arranged side by side in the circumferential direction of the insulator. The commutator pieces are each composed of a conductive plate material, and each includes a connection claw and an engagement claw. The connection claw extends outward in the radial direction of the insulator while being configured to electrically being connected to an armature coil. The engagement claw extends inward in the radial direction of the insulator and engages with the insulator. The commutator pieces each include a recess portion with an undercut formed in a surface facing inward in the radial direction of the insulator.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: January 22, 2019
    Assignee: DENSO CORPORATION
    Inventors: Toshiyuki Osawa, Kouji Hyoudou, Ryohei Kageyama
  • Patent number: 9853515
    Abstract: A ring element includes a convex, in particular rounded, surface element for arrangement on at least one axial end region of a winding section of an electric motor rotor. The surface element provides a minimum radius curvature for supporting an inner layer of a rotor winding on the winding head. An insulating lamination element for an electric motor rotor onto which a rotor winding is intended to be wound includes the ring element. An electric motor, in particular a universal motor, includes a rotor with a rotor winding having the ring element. An electric machine tool, in particular a handheld electric machine tool such as an angle grinder, a drill, a saw or the like, includes the electric motor.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: December 26, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Josef Effler, Christoph Wagner, Joachim Schadow, Juergen Hein, Joerg Goehner
  • Patent number: 9742245
    Abstract: A ground wire connection structure for a motor includes: a frame that has electrical conductivity; a flange that is integrated with the frame on one axial end surface of the frame and has electrical conductivity; a protrusion that is protruded outward from a flange surface of the flange and has a through hole; and a conductive pin that has a press-fit portion press-fitted and fixed into the through hole, a diameter-increased head portion, and a solder cup protruded from the head portion to allow an exposed tip end of a ground wire to be inserted and joined into the inside.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: August 22, 2017
    Assignee: SANYO DENKI CO., LTD.
    Inventors: Toshihito Miyashita, Manabu Horiuchi
  • Patent number: 9431649
    Abstract: A process includes suspending an electroactive material in a solvent, suspending or dissolving a carbon precursor in the solvent; and depositing the carbon precursor on the electroactive material to form a carbon-coated electroactive material. Compositions include a graphene-coated electroactive material prepared from a solution phase mixture or suspension of an electroactive material and graphene, graphene oxide, or a mixture thereof.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: August 30, 2016
    Assignee: UCHICAGO ARGONNE, LLC
    Inventors: Khalil Amine, Ali Abouimrane
  • Patent number: 9431862
    Abstract: A winding structure which is disposed over an armature and a commutator includes an equalizer. The equalizer includes a going portion and a return portion which are wound across one group of teeth through a slot and connected between two identical segments. In a case where an integer number is an expansion value among values which are integer multiples of a value which is acquired by dividing the total number of the slots by the total number of pole pairs, when one group of the teeth having the same total number as the expansion value is given as an element teeth group, the going portion and the return portion are wound across the element teeth group through the slots positioned at both sides of the element teeth group.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: August 30, 2016
    Assignee: NIDEC CORPORATION
    Inventors: Yusuke Makino, Takahiro Hiwa, Shohei Osuga
  • Patent number: 9035529
    Abstract: A commutator has a plurality of commutator segments fixed to an insulating support member. The commutator segments are formed by cold or hot forming a copper billet cut from a length of copper wire. Each billet has a volume approximately equal to the volume of one commutator segment. Each commutator segment has a main body and an anchor integrally formed with the main body. The commutator segments are spaced about a circle and then an insulating support member is molded to the commutator segments to fix the commutator segments to the support member.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: May 19, 2015
    Assignee: Johnston Electric S.A.
    Inventors: Raven Wai Kei Mok, Zhi Yang Yao, Xiao Jun Yang, Chung Fai Choi, Wilfried Gorlt, James Ching Sik Lau, Alan Kin Fung Man, Kui Man Lai
  • Patent number: 9024504
    Abstract: A segment of a carbon commutator includes a carbon layer on a surface side and a metallic carbon layer on a bottom side, and the carbon layer and the metallic carbon layer both contain a thermoplastic resin binder.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: May 5, 2015
    Assignees: Denso Corporation, Tris Inc.
    Inventors: Makoto Nishio, Shinya Nakagawa, Yuya Nishino, Kenzo Kiyose, Takashi Fukutsuka
  • Patent number: 8970147
    Abstract: An apparatus in an electric vehicle including a propulsion electric motor powered by energy from an energy storage system, including a field oriented motor controller generating motor control signals for the electric motor, the motor control signals responsive to a flux command signal and a torque command signal; a torque command calculator, coupled to the motor controller, generating the torque command signal to command a desired torque; an optimal efficiency controller, coupled to the torque command calculator, generating an operating efficiency flux to operate the electric motor at a first determinable efficiency using a first power from the energy storage system while providing the desired torque; an excess dissipation controller generating an inefficient flux to operate the electric motor at a second determinable efficiency using a second power from the energy storage system independent of the desired torque wherein the second power is greater than the first power; and a mode controller setting the flux
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: March 3, 2015
    Assignee: Tesla Motors, Inc.
    Inventors: Andrew David Baglino, Greg Grant Solberg
  • Patent number: 8941283
    Abstract: A windshield wiper motor includes a reduction mechanism unit and an electric motor. The electric motor includes a yoke formed in a bottomed cylindrical shape; four magnets arranged in a cylindrical shape on an inner surface of the yoke, an armature including a rotary shaft rotatably supported by the yoke, an armature core fixed to the rotary shaft and including any teeth of fourteen teeth, eighteen teeth, and twenty two teeth, a commutator being fixed to the rotary shaft and including a plurality of segments insulated from each other with the same number as the number of the teeth of the armature core, an armature coil being wound, and a plurality of connecting wires respectively connected to the segments arranged to face each other around the rotary shaft, and a first brush, a second brush, and a third brush coming into sliding contact with the segments of the commutator.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: January 27, 2015
    Assignee: Mitsuba Corporation
    Inventors: Tatsuyuki Saito, Ryuichi Takakusagi, Toshiyuki Kimura, Yoshichika Kawashima, Kenji Sakata
  • Patent number: 8937423
    Abstract: A disk motor and an electric power tool in which positioning of a coil disk with respect to a commutator disk can be carried out while reliably ensuring insulating properties are provided. A disk motor having: an output shaft part; a coil disk that is provided with a coil pattern and provided coaxially to the output shaft part; a commutator disk that is provided with a commutator pattern and provided coaxially to the output shaft part; and a positioning pin that is electrically insulated from the coil disk and the commutator disk, is engaged with the output shaft part and the coil disk, and carries out positioning of the coil disk with respect to the output shaft part, and an electric power tool having the disk motor are provided.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: January 20, 2015
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hirohisa Tomita, Hideyuki Tanimoto
  • Publication number: 20150015111
    Abstract: The present invention is a sliding contact member, including a powder compact portion that contains an electrically conductive diamond and an electrically conductive binder, and is provided at least on a sliding contact surface of either or both of two sliding contact members slidably in contact with each other. The sliding contact members are applied to DC motors, generators and the like.
    Type: Application
    Filed: February 21, 2013
    Publication date: January 15, 2015
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yoshitaka Uehara, Hirotaka Miwa, Toshikazu Nanbu, Yoshirou Noguchi
  • Patent number: 8928201
    Abstract: A motor has an output shaft which is rotatably supported by a housing, a rotor which is fixed to the output shaft and which comprises a printed-wiring board, and a stator which is fixed to the housing and which comprises a magnet facing the rotor. The printed-wiring board comprises a coil/commutator disk and a coil disk. A commutator conductor pattern is formed in a commutator region of the coil/commutator disk. Likewise, coil conductor patterns are formed in respective coil regions of the coil/commutator disk and of the coil disk.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: January 6, 2015
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hideyuki Tanimoto, Chikai Yoshimizu, Nobuhiro Takano, Hiromi Ozawa, Kazuhiko Funabashi
  • Patent number: 8896180
    Abstract: Disclosed herein is a switched reluctance motor including: a shaft rotatably supporting the switched reluctance motor in an axial direction; a cylindrical part provided at a central portion of the shaft and movable vertically; an elastic member formed to enclose the shaft, formed from an upper portion of the shaft to an upper portion of the cylindrical part to thereby support a rise of the cylindrical part, and having elasticity; commutator segments attached to an outer peripheral surface of the cylindrical part and having a cylindrical shape; brushes contacting or not contacting the commutator segments according to vertical movement of the cylindrical part; and a propeller provided on a lower portion of the cylindrical part and pushing air at the time of rotation to thereby move the cylindrical part upwardly.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: November 25, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byeong Han Kim, Chang Hwan Choi, Hee Soo Yoon, Han Kyung Bae
  • Patent number: 8878417
    Abstract: A carbon commutator, for an electric motor, has a plurality of segments forming a brush contact surface and a hub supporting the segments. Each segment has a connector having a terminal for connection of a lead wire, a carbon layer forming the brush contact surface, and a connecting layer fixed to the carbon layer and electrically connecting the carbon layer to the connector. A plurality of micro structures is formed at the interface between the connecting layer and the carbon layer.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: November 4, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Guo Hua Luo, Jing Chao Zheng, Yiu Chung Wu, Chi Hang To
  • Publication number: 20140285059
    Abstract: A commutator (10) comprising a plurality of commutator bars (12) formed from a graphite structure (30) and a metal sheet (20) having soldered to the graphite structure (30) includes a brazing process followed by a soldering process. The brazing process includes applying a brazing material the graphite structure (30) and brazing at an elevated temperature to form a brazing layer (40). The soldering process includes applying a solder material to the brazing layer (40), placing the metal sheet (20) on the solder material, and soldering to form a solder layer (50) affixing the metal sheet (20) to the graphite structure (30). A plurality of grooves (70) are cut in the graphite structure (30) and the metal sheet (20) to form the commutator bars (12) arranged in an intermittent ring or circle.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicants: Shenzhen Joint Welding Material Co., Ltd., Johnson Electric S.A.
    Inventors: Zhiping ZOU, Jianjun GUO, Chihang TO, Zonghui ZHENG
  • Patent number: 8796900
    Abstract: An electric motor has a stator, a rotor and brush gear. The rotor includes a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft, and rotor windings wound on the rotor core and electrically connected to the commutator. The brush gear includes at least two arcuate brushes for making sliding contact with the commutator. The commutator and brush gear are disposed within a space formed in the rotor core to minimize the axial length of the motor.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 5, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Ji Dong Chai, Yan Nian Liu, Liang Guan, Bao Ting Liu
  • Publication number: 20140159521
    Abstract: An apparatus includes multiple brushes (30, 30B, 30A, 30a, 30b) and a commutator (10) that has multiple commutator plates (12, 12A, 12B, 13B) to contact the multiple brushes for commutation in order to convert electrical energy into mechanical energy or vice versa. A brush may include an EMI suppression mechanism (30, 38A, 38B) to reduce random electromagnetic interferences or a filter circuitry (400B) to reduce the overall level of electromagnetic interferences. An EMI suppression mechanism may include a specially designed brush that leverages dielectric properties or mechanical properties of the brush to reduce electromagnetic interferences. An EMI suppression filter circuitry may include an all-capacitor filter circuitry that does not include beads or chokes.
    Type: Application
    Filed: July 31, 2013
    Publication date: June 12, 2014
    Applicant: Johnson Electric S.A.
    Inventors: Tongjie LI, Qingbin LUO, Guowei SUN, Ying CHEN, Huiting ZHONG
  • Publication number: 20140117808
    Abstract: An electric motor includes: an electric motor case shaped like a cylinder; an electric motor shaft rotatably provided at a center of the electric motor case; a magnet provided at an inner circumferential surface of the electric motor case; a coil provided to correspond to the magnet; a brush provided between the coil and the electric motor shaft and connected with an external power to transmit current of the external power; and a commutator configured to receive power from the brush and supply the received power to the coil.
    Type: Application
    Filed: December 19, 2012
    Publication date: May 1, 2014
    Applicant: Hyundai Motor Company
    Inventors: Soo Hyung Woo, Jin Kook Kong, Jin Soon Kim
  • Patent number: 8686612
    Abstract: An electrical machine, in particular an electric motor, has a first number (k) of commutator laminates (10, 12, 14) and brushes (16, 18), wherein the commutator laminates (10, 12, 14) are arranged distributed uniformly in the circumferential direction of a circumference of a laminate support (24). The brushes (16, 18) are arranged such that commutation times are distributed as uniformly as possible in order to reduce current ripple when using a wave winding and a number of brushes (16, 18) which is less than a number of poles (2p) in the electrical machine.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: April 1, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Gerald Roos, Pierre Bernard
  • Patent number: 8663738
    Abstract: Disclosed herein are an armature for fuel pumps and a manufacturing method thereof, in which a polymer coating film is formed on an armature core such that the armature has corrosion resistance to an alcohol fuel and to a highly corrosive fuel.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: March 4, 2014
    Assignee: Coavis
    Inventors: Kisang Moon, Seonghwan Moon
  • Patent number: 8643247
    Abstract: Disclosed is an electric motor including a yoke formed in a bottomed cylindrical shape; permanent magnets arranged on an inner peripheral surface of the yoke; an armature including a rotary shaft journalled on the yoke, an armature core formed with a plurality of teeth and fixed onto the rotary shaft, an armature coil wound around the teeth of the armature core, a commutator having a plurality of segments and being fixed onto the rotary shaft, and a connecting wire connecting two segments arranged to face each other back to back around the rotary shaft, the armature being surrounded by the permanent magnets and accommodated within the yoke; and a first brush, a second brush, and a third brush coming into sliding contact with the segments of the commutator of the armature.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: February 4, 2014
    Assignee: Mitsuba Corporation
    Inventors: Tatsuyuki Saito, Ryuichi Takakusagi, Toshiyuki Kimura, Yoshichika Kawashima, Kenji Sakata
  • Patent number: 8525384
    Abstract: A vibration motor includes: a core pivotally supported on a shaft; a commutator for supplying electric current to a coil; a commutator holder having through holes extending in an axial direction of the shaft; and chip type varistors fitted into the through holes. The commutator is provided with conductors extending in the axial direction of the shaft, and the conductors are inserted into the through holes and press-fixed to end electrodes of the chip type varistors. A first protrusion is provided on a first wall surface forming each through hole, and a second protrusion facing the first protrusion is provided on a second wall surface.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: September 3, 2013
    Assignee: Nidec Copal Corporation
    Inventor: Noboru Segawa
  • Patent number: 8436505
    Abstract: Disclosed is a motor in which a commutator (10) is provided with connecting wires which short-circuit equipotential segments; brushes (21) are constituted by a low-speed brush (21a), a high-speed brush (21b), and a common brush (21c) used in common by the low-speed and high-speed brushes, and are juxtaposed along the circumferential direction. The circumferential brush width (W2) of the high-speed brush is set to be smaller than the circumferential brush width (W1) of the low-speed brush. The high-speed brush and the low-speed brush are formed so that simultaneous sliding contact with equipotential segments (15) can be avoided. Additionally, armature cores (8) are provided such that a plurality of teeth (12) is point-symmetrical about a rotary shaft (3) at equal intervals in the circumferential direction, and the teeth and slots (13) are formed so as to exist alternately at intervals of 90 degrees in the circumferential direction.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: May 7, 2013
    Assignee: Mitsuba Corporation
    Inventors: Tatsuyuki Saito, Ryuichi Takakusagi, Toshiyuki Kimura, Yoshichika Kawashima, Kenji Sakata
  • Patent number: 8368263
    Abstract: A universal motor has a rotor and a stator. The stator comprises a pair of symmetrical C-shaped stator cores and two windings respectively wound on the stator cores. Each stator core comprises a yoke and a pair of poles extending from opposite ends of the yoke. The windings are wound on the yokes. Each pole has a curved surface and the surfaces of the poles cooperatively form an opening. The rotor is rotatably received in the opening.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: February 5, 2013
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Mao Xiong Jiang, Li Sheng Liu, Jian Zhao, Yong Li
  • Patent number: 8368279
    Abstract: The invention relates to a commutator for an electrical machine, having a commutator body on the outer circumference of which a plurality of electrically conductive, elongated laminations are disposed parallel to the longitudinal axis of the commutator. The laminations disposed adjacent to one another are electrically insulated from one another. The ends of the laminations, oriented toward the wire windings of an armature, are each electrically conductively connected to at least one wire end. According to the invention, it is provided that the ends of the laminations end, perpendicular to the longitudinal axis of the commutator, in planes offset from one another.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: February 5, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Werner Rieker, Ludwig Schoen
  • Patent number: 8330320
    Abstract: [Problem to be Solved] There is provided a highly wear-resistant and durable sliding contact material applicable to a commutator of a motor used for high-capacity applications in which the initial starting current (IS) is 1 ampere or higher. [Solution] The present invention provides a sliding contact material in which metal oxide particles are dispersed in an Ag alloy matrix, wherein the Ag alloy matrix is an Ag alloy containing 0.01 to 10.0 wt % of at least one kind of Fe, Co, Ni and Cu in Ag, and 0.1 to 3.0 wt % of a Ta oxide is dispersed as the metal oxide. In the present invention, 0.1 to 10.0 wt % of metal oxide particles of one kind or two or more kinds of Mg, Fe, Co, Ni and Zn may further be dispersed. The sliding contact material is used in a mode of clad composite material formed by embedding the sliding contact material in a part of a base material consisting of Cu or Cu alloy.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: December 11, 2012
    Assignees: Mabuchi Motor Co., Ltd., Tanaka Kikinzoku Kogyo K.K.
    Inventors: Keiji Nakamura, Makoto Takabatake, Hideyuki Uzawa, Masahiro Takahashi, Yoshinori Horiuchi, Takao Asada, Osamu Sakaguchi
  • Patent number: 8294327
    Abstract: The invention relates to a method and device for producing an electric machine, an electric machine with a commutator, having commutator hooks for fixing electric wire windings with solder arranged between the commutator hooks and the wire winding and two electrodes arranged adjacent to each other which are pressed against the commutator hooks. An electric current is passed through the commutator hooks by means of electrodes such that the solder melts and forms a connection to the wire winding.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: October 23, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Pascal Chaumet, Axel Diederichs, Achim Neubauer, Andreas Friedmann, Dirk Altmeyer, Helmut Huber, Werner Herm, Edgar Seiler-Wegner
  • Patent number: 8274193
    Abstract: The windings (12) wound around each of the teeth (9) form two coil groups (71, 72) of three-phase concentrated windings which are disposed point-symmetrically to each other with respect to the rotational shaft. Each of the coil groups (71, 72) includes a first coil (33), in which the windings (12) are wound around the teeth in a forward direction, and a second coil (34), in which the windings (12) are wound around the teeth in a reverse direction. When each of the teeth (9) is allocated with a U phase, a V phase, and a W phase in this order in a circumferential direction so that the first coil (33) wound for each phase is set to be coils of the U phase, the V phase, and the W phase, and the second coil (34) wound for each phase is set to be coils of the ?U phase, the ?V phase, and the ?W phase, the coils of the U, ?W, V, ?U, W and ?V phases are electrically connected between the adjacent segments (14) in this order.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: September 25, 2012
    Assignee: Mitsuba Corporation
    Inventors: Yoshichika Kawashima, Naoki Shioda
  • Patent number: 8269394
    Abstract: The invention relates to a commutator with contact segments, arranged at a distance from each other and forming a brush running surface. Each contact segment is soldered to a securing portion of a metal segment support piece. The commutator has a hub body made from an electrically insulating material which supports the segment support pieces which are each provided with a winding connector hook. According to the invention, at least one solder barrier recess is provided in the upper side of the securing portion facing the contact segment and/or in the under side of the contact segment facing the securing portion.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: September 18, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Andrew Pierson, Dirk Altmeyer, Helmut Huber
  • Patent number: 8242655
    Abstract: An engine cooling system, comprising a fan unit, cooling pipes and a coolant tank, the coolant tank, the cooling pipes and cooling channels of the engine being connected together and forming a cooling cycle, the fan unit being used to cool the cooling pipes and the coolant therein; wherein the fan unit comprises a motor and fan blades driven by the motor, the motor comprising a stator and a rotor rotatable mounted confronting the stator; the rotor comprising a shaft, a commutator fitted to the shaft, a rotor core fitted to the shaft adjacent to the commutator, windings wound about teeth of the rotor core and electrically connected to segments of the commutator; the windings being wound by aluminum cored wire that has a electrical insulation film around its peripheral surface.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: August 14, 2012
    Assignee: Johnson Electric S.A.
    Inventors: Rui Feng Qin, Yi Jing, Xin Hui Guan, Gianpaolo Arucci
  • Patent number: 8232695
    Abstract: A rotating electromagnetic machine has a tubular axle with mounting rings, a common ring, a coil input ring, and at least one bearing set mounted on it. A fitting is secured at a distal end of the tubular axle, and a commutator is secured at the proximal end. A housing is mounted on the bearing sets through adaptors. Connecting bars extend axially within the axle with lateral rods joined to the connecting bars at their distal ends, the bars commuting between segments of the commutator electromagnetic coils. A plurality of the electromagnetic coils are secured to the coil input ring. The coils are formed of spiral turns of a single flat strip electrically conductive material. A plurality of peripheral and sector magnets are mounted adjacent to the electromagnetic coils with electromagnetic interaction when relative motion occurs between the coils and the magnets.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: July 31, 2012
    Assignee: ClearWater Holdings, Ltd
    Inventor: Dumitru Bojiuc