Armature Or Primary Patents (Class 310/195)
  • Patent number: 10298081
    Abstract: A separator (10, 60, 65, 100) is disclosed for electrically separating groups of end windings (52) in the stator of a rotating electrical machine. The separator is arranged to provide circumferential air channels (24, 74, 85) through the windings. This can allow air flow to be delivered to inside the windings, thereby cooling the windings more effectively.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: May 21, 2019
    Assignee: Cummins Generator Technologies Limited
    Inventors: Rahul Prakash Mokhadkar, Gareth Gilson, Tom Ede, Dave Worthington, Mark Riches, Richard Clark, Chris Gutteridge, Philip David Bend
  • Patent number: 10170950
    Abstract: First and second winding bodies are each configured so as to have a helical shape by winding a conductor wire for m turns, where m is a natural number that is greater than or equal to two, an armature winding is configured by mounting two-lane winding bodies into respective pairs of slots, two-lane winding bodies being configured by assembling the first and second winding bodies, the coil ends include a top portion that displaces in a radial direction at a central portion, and the radial displacement at the top portion is a×d, where a is a natural number that is greater than or equal to 2 and less than or equal to 2×(m?1), and d is a radial thickness of the rectilinear portions, 4×m of the rectilinear portions being housed inside the slots so as to line up in single columns.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: January 1, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Atsushi Sakaue, Hironori Tsuiki, Hiroyuki Akita, Akira Hashimoto
  • Patent number: 10044236
    Abstract: A stator includes a stator core having slots and a stator coil comprised of three star-connected phase windings. In each of the slots, there are arranged in-slot portions of the phase windings in six layers. Each of the phase windings is comprised of five parallel-connected sub-windings. At each of the six layers, the in-slot portions of the sub-windings are arranged in a plurality of slot pairs; the slot pairs are circumferentially spaced from one another and each consist of two consecutive slots that are respectively identified as types A and B of the slots. Moreover, for each of the sub-windings, the in-slot portions of the sub-winding are evenly distributed to the two types A and B so that the number of the in-slot portions of the sub-winding arranged in the slots of the same type at each of the six layers is equal to 2.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: August 7, 2018
    Assignee: DENSO CORPORATION
    Inventor: Akito Tamura
  • Patent number: 10020694
    Abstract: A generator includes a plurality of magnets defining one of a rotor and a stator, a conductor including a core and a coil, the conductor defining the other of the rotor and the stator, and a shaft to which the stator is fixable. The core has a width inwardly narrowed from an outer edge toward an inner edge along a longitudinal direction of the core.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: July 10, 2018
    Inventor: Ja Choon Jung
  • Patent number: 9985491
    Abstract: Stator coils each consist of a plurality of rectangular conductor coil pieces, the adjacent connection ends of which are connected to each other on the outer diameter side of a stator. The coil pieces each have: a folded portion folded in a rotation axis direction on the inner diameter side of the stator; inner diameter-side open leg portions opened from both sides of the folded portion toward the circumferential directions of the rotation axis; linear portions each bent from each of the inner diameter-side open leg portions and disposed so as to pass through the stator from the inner diameter side to the outer diameter side; and an outer diameter-side open leg portions opened from the linear portions toward the circumferential directions of the rotation axis and extending to the connection ends.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: May 29, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Tanaka, Koichi Watanabe, Satoshi Kikuchi, Akihito Nakahara, Kenta Deguchi
  • Patent number: 9966808
    Abstract: A mechanical energy-to-electricity transformer using kinetic energy of a hydraulic machine is provided, including: a power unit, for connecting to the hydraulic machine; a generator, including a rotor, a stator and an output electrode set, the rotor connected to the power unit and twelve magnetic members, the rotor being rotated with a rotational speed lower than or equal to 600 rpm, N pole and S pole of the magnetic members circumferentially alternatively arranged, the stator having thirty-six ditches axially, between every adjacent two ditches forming a tooth, the ditches, teeth, coil units magnetic members defining winding sets circumferentially arranged in intervals by 120 degrees to form a three-phase AC structure electrically connected with the output terminal, the three-phase AC structure being rotatable relative to the magnetic members to generate AC power of 60 Hz and 220 V.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: May 8, 2018
    Inventor: Yao-Lin Wang
  • Patent number: 9685832
    Abstract: The electric motor includes a rotor and a stator, the stator having a conductive wire wound thereon via a stator core and insulators. The insulators include an annular outer peripheral wall portion with the conductive wire run on an outer periphery side of the peripheral wall portion, a plurality of winding body portions protruding radially from the outer peripheral wall portion, and an inner flange portion. The outer peripheral wall portion on the winding body portion side includes an outer peripheral surface formed in an arc shape. The radial thickness of the outer peripheral wall portion is increasingly greater toward the circumferential center of the winding body portions.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: June 20, 2017
    Assignee: FUJITSU GENERAL LIMITED
    Inventor: Yoshihiro Taema
  • Patent number: 9641035
    Abstract: A stator for a motor that includes an armature coil that generates an N-pole and an S-pole by applying a current and forty-eight slots radially formed at which the coil is disposed and in which the armature coil alternately implements N-poles and S-poles by arranging six slots as a single unit as the current is applied to the coil. The slot includes a plurality of phase drawing out slots, and when the order of the phase drawing out slots is determined in a clockwise direction by setting one phase drawing out slot as a first phase drawing out slot, at least two methods of winding the armature coil to turn around the slot may be used to decrease a distance from the first phase drawing out slot to the last phase drawing out slot to a minimum value by setting a cell between neighboring slots as a unit.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: May 2, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dongyeon Han, Young Jin Seo, Hyoungjun Cho, Myeong Kyu Jung
  • Patent number: 9455616
    Abstract: A control device 50 that drives and controls a brushless motor 3 of a four-pole 24-slot configuration includes: a base current calculation section 52 that calculates fundamental-wave current indicating a winding current value associated with maximum torque control; a correction component calculation section 59 that calculates 12th-order first higher harmonic wave component B sin 12(?+?) to cancel a torque ripple of magnet torque, and 12th-order second higher harmonic wave component A sin 12(?+?) to cancel a torque ripple of reluctance torque, based on a phase current value detected by a current sensor 64; a correction map 58 in which relation between phase current and parameters A, B, ?, and ? of the both higher harmonic wave components is stored; and a current correction section 60 that corrects supply current by superimposing each 12th-order higher harmonic wave component on the fundamental-wave current in order to create current command values Id? and Iq?.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: September 27, 2016
    Assignee: Mitsuba Corporation
    Inventors: Masayuki Okubo, Keisuke Mitsuoka
  • Patent number: 9325214
    Abstract: An electric power collection and distribution ring includes first to third bus rings configured to collect and distribute electric power from and to winding wires of a plurality of phases. The first to third bus rings include first to third annular conductor parts, respectively, and first to third feeding terminal parts, respectively, configured to feed electric power to the first to third annular conductor parts, respectively. The second feeding terminal part projects toward another side in an axial direction of the first to the third annular conductor parts without projecting toward the one side in the diameter direction than the first annular conductor part. The third feeding terminal part projects toward the another side in the axial direction of the first to the third annular conductor parts without projecting toward the one side in the diameter direction than the second annular conductor part.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: April 26, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventors: Kazuhiko Tomita, Kenichi Egami
  • Patent number: 9178390
    Abstract: A motor comprises a coil structure and a plurality of magnetic materials. The coil structure includes three winding groups, each of which has a plurality of winding portions. The winding portions have an interval therebetween, and are electrically connected by a wire. The magnetic materials are disposed adjacent to the coil structure and corresponding to the winding groups. Accordingly, the motor has more magnetic materials within the same bending angle of the enameled wire, so that the motor can output larger torsion and power to enhance the motor efficiency.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: November 3, 2015
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Sheng-En Mai, Chia-Hung Hsu, Yen-Chun Huang
  • Patent number: 9035525
    Abstract: According to one embodiment, there is provided a 3-phase 2-pole 2-layer armature winding, housed in 72 slots provided in a laminated iron core, a winding of each phase including six parallel circuits separated into two phase belts. Upper coil pieces of first and fourth parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, and lower coil pieces of the first and fourth parallel circuits are placed at 1st, 6th, 9th, and 10th positions, upper and lower coil pieces of second and fifth parallel circuits are placed at 2nd, 5th, 8th, and 11th positions, and upper coil pieces of third and six parallel circuits are placed at 1st, 6th, 9th, and 10th positions, and lower coil pieces of the third and six parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, from the center of a pole.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: May 19, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tadashi Tokumasu, Masafumi Fujita, Takashi Ueda, Mikio Kakiuchi
  • Publication number: 20150123508
    Abstract: Rotating machinery of the invention includes a 2n-pole rotor, 72n slots, and three-phase armature windings (n?1). Each of the slots houses a top coil on an inner radius side of the slots and a bottom coil on an outer radius side thereof. Each of the armature windings is formed by connecting the top and bottom coils and has 2n phase belts per phase. Each of the phase belts includes a first parallel winding and a second parallel winding. The top and bottom coils are formed by arranging the first and second parallel windings in a predefined order when a circumferential mean position of all top coils and bottom coils in each of the phase belts is defined as a phase belt center and an arrangement of the first and second parallel windings in at least one phase belt is viewed in an order of proximity to the phase belt center.
    Type: Application
    Filed: November 4, 2014
    Publication date: May 7, 2015
    Inventors: Jun YOSHIDA, Kazuhiko TAKAHASHI, Norihito YANAGITA, Shigeki TOUNOSU
  • Publication number: 20150076951
    Abstract: An electric machine includes a laminated stack. The laminated stack includes first and second additively manufactured conductive phase coils. Each of the first and second additively manufactured phase coils includes of a plurality of conductive strands. An additively manufactured end winding conductively couples the first and second phase coils. The end winding has a non-circular cross-sectional geometry.
    Type: Application
    Filed: February 26, 2014
    Publication date: March 19, 2015
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Matthew E. Lynch, Tahany Ibrahim El-Wardany, William A. Veronesi, Jagadeesh Tangudu, Andrzej Ernest Kuczek, Vijay Jagdale
  • Publication number: 20150061449
    Abstract: A three-phase electromagnetic motor includes: a stator that is formed by winding a winding around a magnetic pole formed between slots of a stator core; and a rotor that is disposed inside the stator and has a permanent magnet. The three-phase electromagnetic motor is formed of 8n poles and 6n slots (n is a natural number). 3n windings are wound around every other magnetic pole among a plurality of magnetic poles of the stator core.
    Type: Application
    Filed: August 22, 2014
    Publication date: March 5, 2015
    Applicant: SANYO DENKI CO., LTD.
    Inventors: Toshihito Miyashita, Manabu HORIUCHI
  • Publication number: 20150048709
    Abstract: Electrically insulating material so foldable as to form an interphase insulator so configured as to be inserted in the slots of the stator or the rotor of an electric machine to prevent separate coils inserted in the same slot to be in direct contact with one another and to prevent the coil heads of different coils to be in direct contact is described herein. The interphase insulator may be so folded that the coil heads are properly insulated from one another.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 19, 2015
    Inventor: Gyula Bihari
  • Patent number: 8946963
    Abstract: A polyphase stator for an internally ventilated rotating electrical machine comprises a body (14) provided with slots and carrying a coil (12) having at least one winding per phase. A plurality of pairs of lateral branches are mounted in a slot of the body (14). A plurality of connecting heads (50 to 55) extend outside the body (14) so as to form a first lead-out (42) and interconnect each pair of lateral branches. A plurality of coupling feet (150 to 155) are offset circumferentially with respect to the plurality of connecting heads and extend outside the body (14) so as to form a second lead-out (43) and interconnect each pair of lateral branches. One of the pluralities has a generally pointed shape and has an axial length of between 15 and 20 mm. The stator is used with an alternator or alternator-stator for a motor vehicle. An internally ventilated electrical machine is equipped with the stator.
    Type: Grant
    Filed: July 4, 2008
    Date of Patent: February 3, 2015
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Xavier Dunesme, Jerome Fournier, Nicolas Langlard, Pierre Faverolle
  • Publication number: 20150028712
    Abstract: An overlapping portion of an insulating portion formed in an annular shape is held between a workbench having a linear projection and an ultrasonic horn having a circular projection with at least part of the linear projection and of the circular projection opposed to each other and ultrasonically welded. In the ultrasonic welding, even though the ultrasonic horn under ultrasonic vibration rotates on the overlapping portion of the insulating portion, the area in the overlapping portion held between the linear projection and the circular projection with at least part of the linear projection and of the circular projection opposed to each other is not reduced after ultrasonic vibration is applied to the ultrasonic horn.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 29, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Tatsuya HORIBA, Shinichi OKUYAMA, Taizo HIRANO, Minoru MERA, Hiroshi FUKASAKU
  • Patent number: 8928199
    Abstract: A wound rotor brushless doubly-fed motor includes a stator and a rotor. The stator includes two sets of three-phase windings and the number of pole pairs is p1 and p2 respectively. The rotor includes a multi-phase wound winding and phase number m is satisfied with the relation m=(p1+p2)/mk, in which, when p1+p2 is odd, mk=1; when p1+p2 is even, mk=2. Rotor slots are evenly distributed along the circumference of the air gap and the number of the rotor slots Z? is satisfied with the relation Z?=n(p1+p2), in which n is a positive integer. Rotor winding coils are multi-turn structure, coil number of each phase winding is nmk and each coil has the same span, but turn ratios among the coils are different. When the phase winding coils number ?nmk, all coils within the phase winding are automatically connected in short after being connected in series.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: January 6, 2015
    Assignees: Huazhong University of Science and Technology, China Changjiang National Shipping Group Motor Factory
    Inventors: Xuefan Wang, Dixian Shu
  • Patent number: 8922089
    Abstract: In a direct-current motor armature 3 corresponding to an 8-pole-10-slot-20-segment or 12-pole-15-slot-30-segment, a connection wire 25 for short-circuiting segments 14 having the same degree of electric potential is provided to a commutator, a coil 12 is connected electrically to the segments 14 having a potential difference that is equal to a potential difference between the adjacent segments 14, and the coil 12 is wound around teeth 9 to form armature coils 7. Accordingly, an armature for use in a direct-current motor, a direct-current motor, and a method for winding wires around the armature of the direct-current motor for enabling down-sized direct-current motors having extended product life and enhanced performance can be provided.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: December 30, 2014
    Assignee: Mitsuba Corporation
    Inventors: Yoshichika Kawashima, Naoki Shioda
  • Publication number: 20140368079
    Abstract: Embodiments provide a method for assembling a motor. The method may include providing a first rotor, a second rotor and a stator; and assembling the first rotor, the second rotor and the stator such that the stator is arranged between the first rotor and the second rotor.
    Type: Application
    Filed: February 13, 2013
    Publication date: December 18, 2014
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Chiew Leong Wong, Ralph Stephen Viskochil
  • Publication number: 20140354106
    Abstract: An electrical machine includes an armature defining a winding slot that houses a winding. A slot opening connects into the winding slot. A flux repeller is disposed in the slot opening to reduce slot leakage flux. In certain embodiments the armature is a stationary armature defining a plurality of winding slots, each winding slot housing a winding. A rotor is disposed radially apart from the stationary armature with a radial gap defined between the armature and rotor core. Each winding slot has a slot opening that connects the winding slot to the gap. A plurality of flux repellers is included as described above, with a respective one of the flux repellers disposed in each respective slot opening to reduce slot leakage flux.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 4, 2014
    Inventors: Jacek F. Gieras, Gregory I. Rozman
  • Publication number: 20140346910
    Abstract: In a permanent magnet type concentrated winding motor, the number of magnetic poles is M, a stator Sr has an N number of teeth T around which coils are concentratedly wound and which are circumferentially arranged at equal intervals, M is equal to (18±4)n and N is equal to 18n, an armature winding AW has an m number of parallel circuits, and a 1-phase circuit of the parallel circuits is configured to have a 6n/m number of coils connected in series with each other.
    Type: Application
    Filed: December 12, 2011
    Publication date: November 27, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masatsugu Nakano, Satoru Akutsu, Yoshihito Asao, Yuji Takizawa, Yu Hirotani, Ryuichi Takiguchi
  • Publication number: 20140339944
    Abstract: The invention relates to the field of electrical engineering, specifically to low-speed electrical generators, and can be used in particular in wind energy installations. In the proposed electromagnetic generator the rotor is equipped with permanent magnets (3, 4) and the stator comprises two parallel plates (5, 6), between which annular windings (7) are arranged. The rotor is formed from two parallel discs (1, 2) fixed to a shaft (10), with circular rows of said permanent magnets arranged on each of said parallel discs on surfaces facing one another, the polarity of said permanent magnets in each row alternating, while the poles of the permanent magnets in one row are turned towards the opposite poles of the permanent magnets in the other row. The annular windings (7) of the stator are inserted in pairs one inside the other and are in the form of isosceles trapeziums, the lateral sides (8, 9) of which are arranged radially relative to the axis (10) of rotation of the rotor.
    Type: Application
    Filed: August 9, 2012
    Publication date: November 20, 2014
    Inventors: Sergej Mickhailoich Esakov, Mikhail Sergeevich Esakov, Anatolij Yurievich Veliko-Ivanenko
  • Patent number: 8878413
    Abstract: An alternating-current generator, in particular a three-phase generator, for a motor vehicle, having a rotor including north and south poles, particularly having claw-pole fingers extending in the axial direction and alternating as north and south poles at the rotor's periphery, a stator having a magnetic core, especially laminated core, having slots and a stator winding disposed in the magnetic core's slots, the stator winding having winding overhangs that are coolable by an approximately radial air flow produced by at least one fan mounted at the rotor, the stator being situated opposite the rotor, and the stator and the rotor having defined positions relative to each other, the multiphase stator winding being made up of winding elements, at least one winding element having more than two sections inserted in slots, and at least one winding element having more than one reversal section which brings about a change in the radial position.
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: November 4, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Gert Wolf, Thomas Berger, Eberhard Rau, Alexander Shendi, Helmut Kreuzer, Christoph Schwarzkopf
  • Publication number: 20140319952
    Abstract: The main motor for a railway vehicle is rotationally driven upon receiving an AC power supplied from an inverter circuit that includes a switching element formed by using a wide bandgap semiconductor. The inverter circuit applies a voltage having a PWM waveform to the main motor for a railway vehicle in at least part of a speed range of an electric vehicle. The stator of the main motor for a railway vehicle is configured to include an annular stator core provided with a plurality of slots in a circumferential direction and coils that are wound on the stator core and are accommodated in the slots, and includes a stator winding that is three-phase star-connected and is composed of parallel circuits the number of which is the same as the number of poles for each phase.
    Type: Application
    Filed: September 30, 2011
    Publication date: October 30, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenta Kaneko, Haruyuki Kometani
  • Publication number: 20140305246
    Abstract: A rotary motor includes a rotor and at least one stator. The rotor has a shaft. The stator has an iron core and a coil wound around the iron core. A cross section of the iron core perpendicular to the shaft has a long axis and a short axis, and the rotor is disposed on an extension line of the long axis.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 16, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: CHING-HSIUNG TSAI, HONG-CHENG SHEU, CHI-WEN CHUNG
  • Patent number: 8860268
    Abstract: Provided is an rotational vibration exciter, and more particularly to an rotational vibration exciter which can accurately generate angular vibration of a printed circuit board including a moving coil for rotational excitation and angular vibration of a rotational shaft integrated with the printed circuit board including the moving coil by replacing a conventional cable as an external current supply line with a vertical flexible PCB.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: October 14, 2014
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Wan Sup Chung, Sae Won Yoon, Jong Yeon Lim
  • Publication number: 20140265710
    Abstract: A coil arrangement for an electric machine comprises a spool including a hub, a first wall positioned on a first side of the hub, and a second wall positioned on a second side of the hub. A length of wire is wound on the hub to form a coil positioned between the first wall and the second wall of the spool. The coil includes a plurality of winding layers including an inner winding layer, an outer winding layer, and at least one intermediate winding layer between the inner winding layer and the outer winding layer. A projection is connected to the spool. The projection includes a first end directly connected to the spool and a second end opposite the first end, the second end is positioned between the first wall and the second wall of the spool. The outer winding layer engages the second end of the projection.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: REMY TECHNOLOGIES LLC
    Inventors: Chad Zook, Scott Bitzer
  • Publication number: 20140265750
    Abstract: A motor is provided. The motor includes a winding support element defining an interior, a rotor having a shaft mounted inside the interior, the shaft defining a central axis, a superconducting wire wound around the winding support element in a winding pattern, where the winding pattern includes a plurality of turns around the winding support element. The winding pattern includes for a first portion of each turn proximate to the rotor, the wiring pattern curves with respect to a toroidal angle about the central axis, and for a second portion of each turn distant from the rotor, the wiring pattern curves with respect to a toroidal angle about the central axis. Cooper pairs travelling through the wire accelerate with respect to the toroidal angle in the first portion, and decelerate with respect to the toroidal angle in the second portion.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: PST Associates, Inc.
    Inventors: Michael H. Graff, Douglas Torr
  • Patent number: 8836195
    Abstract: A motor is provided. When m is half of a number of slots of one phase and n is a divisor of m, the overall parallel winding of a total number of parallels p is equally divided n-fold into partial parallel windings Ni, having a number of parallels p/n, each partial parallel winding Ni comprises m sub-coils, the m sub-coils including n types of m/n sub-coils having a number of turns tj, at least one of the sub-coils differing in number of turns from the other sub-coils, and, for each pair of the slots in the stator, one sub-coil of each partial parallel winding Ni is wound around the pair of slots, and n sub-coils wound around the pair of the slots include every one of the n types of the sub-coils of the numbers of tj.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: September 16, 2014
    Assignee: Okuma Corporation
    Inventor: Takanori Yokochi
  • Patent number: 8829757
    Abstract: A multipolar motor is simply wire-wound and an output thereof is capable of being switched. The motor includes at least 8 magnetic poles, an armature including at least 10 tooth sections; a commutator including at least 20 commutator segments, and brush-sets including 2 positive electrode brushes and 2 negative electrode brushes. A hook-holding section arranged to hook-hold conductor wires is installed on each of the commutator segments. Further, a group of coils is defined by using a single conductor wire that is wound onto each of the plurality of tooth sections and hooked onto the plurality of hook holding sections. This motor can switch the state in which the brush-set is energized.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: September 9, 2014
    Assignee: Nidec Corporation
    Inventor: Yusuke Makino
  • Patent number: 8823236
    Abstract: An object is to provide a rotating electric machine offering a high output and high efficiency by balancing inductance of each phase even if a stator is used in which stator windings of different phases are disposed in a slot of a stator core in a three-phase winding. A stator 5 includes a stator core 6 having a plurality of slots arrayed circumferentially and opening to an inner peripheral surface and a stator winding 7 wound in each of the slots. The stator winding 7 is divided into at least two for each phase (7U-A, 7U-B, 7V-A, 7V-B, 7W-A, 7W-B). After insertion of the stator core 6, the stator winding of each phase is connected in parallel or in series. The stator winding of each phase is disposed in slots such that combined inductance of different phases is equalized.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: September 2, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Yasuhiko Kimura, Yoshimi Mori, Masahiko Honma, Yosuke Umesaki
  • Patent number: 8803397
    Abstract: According to one embodiment, there is provided a 3-phase 2-pole 2-layer armature winding, housed in 72 slots provided in a laminated iron core, a winding of each phase including six parallel circuits separated into two phase belts. Upper coil pieces of first and fourth parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, and lower coil pieces of the first and fourth parallel circuits are placed at 1st, 6th, 9th, and 10th positions, upper and lower coil pieces of second and fifth parallel circuits are placed at 2nd, 5th, 8th, and 11th positions, and upper coil pieces of third and six parallel circuits are placed at 1st, 6th, 9th, and 10th positions, and lower coil pieces of the third and six parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, from the center of a pole.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Tokumasu, Masafumi Fujita, Takashi Ueda, Mikio Kakiuchi
  • Publication number: 20140217846
    Abstract: An electric motor (1), comprising a primary part (2a, 2b) having an iron-free winding device (3) that comprises at least two phases (6) , wherein one phase (6) comprises at least two phase windings (4) and at least one electrical connecting element (5) , a secondary part (7a, 7b) having an even number of magnetic poles (8), which are arranged alternatively on the secondary part (7a, 7b), wherein the winding device (3) is arranged in an air gap (9) between the primary part (2a, 2b) and the secondary part (7a, 7b) relative to an axis (10a, 10b), in such a manner that each phase winding (4) of a phase (6) is arranged opposite a respective magnetic pole (8) and all magnetic poles (8) are usable simultaneously for force formation.
    Type: Application
    Filed: February 26, 2014
    Publication date: August 7, 2014
    Applicant: Otto-Von-Guericke-Universitaet Madgeburg
    Inventors: Roland KASPER, Wolfgang HEINEMANN, Norman BORCHARDT
  • Publication number: 20140210297
    Abstract: A plurality of coils C1 to Cm that constitutes a whole winding L of each phase is divided into g coil groups G1 to Gg for each phase. Each coil group is, for example, constituted by coils C1 to C4 wound around four polar teeth continuously disposed. The number of turns of respective end coils C1 to C4 of the coil group is less than the number of turns of central coils C2 and C3. Further, the whole winding L includes n partial windings N1 to Nn, in which a coil Cj (j is an integer in the range from 1 to m) is constituted by n sub coils S(1,j) to S(n,j) that are formed by the n partial windings. It is feasible to set a non-integer value as an effective number of turns of a coil when the number of turns of each sub coil is appropriately selected.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Applicant: OKUMA Corporation
    Inventor: Tatsuya Shizu
  • Publication number: 20140210284
    Abstract: A motor includes a rotation shaft, a stator, and a rotor. The stator includes an armature winding and a stator core including a main core portion with an axial stack of core sheets and a magnetic plate on an end thereof. Each core sheet includes a tooth formation portion around which the armature winding is wound. The magnetic plate includes a stacked portion and an axially extending portion. The stacked portion stacked on the axial end of the main core portion and includes an end located toward the rotor. The axially extending portion extends toward the outer side in the axial direction from the end of the stacked portion located toward the rotor and is opposed to the rotor in a radial direction of the motor. The axially extending portion is shaped to be magnetically skewed in a circumferential direction relative to the tooth formation portion and the stacked portion.
    Type: Application
    Filed: January 23, 2014
    Publication date: July 31, 2014
    Inventors: Tatsunori BANBA, Hiroshi KATAI, Yuusuke TATEISHI, Yuuji YAMASHITA, Takumi SUZUKI, Kenji OBATA, Yoshimasa KINPARA, Takashi NAGAYA
  • Patent number: 8720042
    Abstract: A stator manufacturing method which manufactures an insulated conductor coil and mounts this coil to the core, the insulated conductor coil being formed by deforming an insulated conductor into a shape having rectilinear in-slot conductor sections and coil end sections having bent sections, the conductor having an enamel layer formed on the outer periphery thereof and also having an extruded resin coating layer formed on the outer periphery of the enamel layer, comprises: a first step of forming the conductor coil by deforming the conductor to form the bent sections while the coating layer of the conductor is in a non-crystalline resin state; a second step of heating the extruded resin coating layer of the conductor coil to change into a crystalline resin state to a temperature higher than or equal to the glass transition temperature; and a third step of mounting the conductor coil to the core.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: May 13, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideaki Kimura, Hiroaki Urano
  • Publication number: 20140111054
    Abstract: The present invention relates to electrical generators and, in particular, to improvements to efficiency in electromechanical energy conversion in electrical generators and electric motors. The regenerative acceleration generator coil according to the present invention takes advantage of the structure of a high impedance multiple-loop salient pole winding or low impedance bi-filar windings to create a positive armature (accelerative) reaction rather than a negative (decelerative) reaction as exhibited by prior art generators which only have low impedance multiple loops of wire making up their rotor armature. The generator of the present invention reverses these negative effects by delaying current flow in the coil until the rotating magnetic field reaches TDC.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 24, 2014
    Inventor: Thane C. Heins
  • Patent number: 8680734
    Abstract: A power system for a vehicle may comprise an electric machine attached to an engine of the vehicle. The electric machine may comprise only one stator core; a stator main winding wound on the one stator core; a stator exciter winding wound on the one stator core. The stator main winding and the stator exciter winding may be magnetically independent from one another even though magnetic-field-isolation material is not interposed between the stator main winding and the stator exciter winding.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: March 25, 2014
    Assignee: Honeywell International Inc.
    Inventors: Cristian Anghel, Parsa Mirmobin, Ming Xu
  • Patent number: 8674576
    Abstract: An electropermanent magnet-based motor includes a stator having at least one electropermanent magnet, at least one coil around the electropermanent magnet configured to pass current pulses that affect the magnetization of the magnet, and a rotor that is movable with respect to the stator in response to changes in the magnetization of the electropermanent magnet. A wobble motor has a stator with a centrally-located core from which arms radiate outward, an electropermanent magnet and coil on each arm, and a rotor exterior to the stator such that the rotor can rotate around the stator arms. A rotary motor has a centrally-located rotor that rotates about its axis and a stator exterior to the rotor such that the rotor may rotate within the stator arms, the stator including an anteriorly-located stator core from which stator arms radiate inward toward the rotor, and an electropermanent magnet and coil on each stator arm.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: March 18, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Ara Knaian, Neil Gershenfeld, Maxim Lobovsky
  • Publication number: 20140062267
    Abstract: Disclosed herein is a design for flux switching machines with one or more armature windings which can deliver controlled torque, in either selected direction on start up, without the use of a mechanical position sensor. Flux switching machines without sensors can operate equally well in either direction. The invention discloses design features for such machines which improves the torque profile of the motor with angle. In three phase machines this delivers higher torque and lower ripple torque. In single phase flux switching machines the invention allows the rotor to be placed in a position where maximum torque can be delivered in either direction by selection of either positive or negative armature current. Rotor slotting is introduced to create a path of low permeability across a rotor tooth with minimal impact on the normal torque producing flux paths. Asymmetry of stator slots is used to further create a stable rotor position when energised by predominantly field means or armature means.
    Type: Application
    Filed: March 26, 2012
    Publication date: March 6, 2014
    Applicant: TECHNELEC LTD
    Inventors: Charles Pollock, Helen Pollock
  • Publication number: 20140053170
    Abstract: There is provided a spindle motor for a 2.5? type disk driving device, including: a base having a stator core seating part protruding upwardly in an axial direction; a stator core including a ring-shaped coreback part, a tooth part, and a front end part; and a coil wound around the stator core, wherein when a length of the stator core from an inner end portion of the coreback part to the endmost part of the front end part is defined as L and a height of the wound coil from the lowermost edge of the coil in an axial direction to the uppermost edge thereof is defined as H, a ratio (H/L) of the height of the wound coil to the length of the stator core in which back electromotive force (B-EMF) is 0.35 V/Krpm or more when the supply of power is stopped satisfies 0.524?H/L?0.703.
    Type: Application
    Filed: October 24, 2012
    Publication date: February 20, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Hyung Ki MOON, Hong Joo Lee
  • Publication number: 20140042863
    Abstract: In a brushed direct current motor including a stator that is provided with 2×P magnetic poles (P is odd and greater than or equal to three), an armature core rotatably held with respect to the stator and includes P×N±2 teeth (N is an even and greater than or equal to four) in a circumferential direction, a commutator held so as to integrally rotate with the armature core and includes commutator segments, the number of the commutator segments being the same as that of the teeth, a winding wound around the teeth in a double-wave form, and two anode brushes and two cathode brushes arranged in sliding contact with the commutator, a width angle WB of each of the brushes in sliding contact with the commutator is set so as to satisfy a relation of “WB>WP+WI”.
    Type: Application
    Filed: July 12, 2013
    Publication date: February 13, 2014
    Inventors: Masayoshi OJIMA, Kohji MAKI
  • Patent number: 8637771
    Abstract: The disclosed invention describes a motor/generator coil produced using rectangular electric current conductors of any thickness and width. A unique joint between the up and down segments of the coil turn enables an improved conductor packing ratio and geometrical orientation that minimizes the effect of eddy currents. The resulting coil produces higher power than typical wire wound motors but is lighter weight and physically smaller in size. In addition, the coil can be free-standing, and is capable of slotless and/or ironless core device configuration.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: January 28, 2014
    Inventors: Greald W Yankie, Gregory S Graham
  • Publication number: 20130342048
    Abstract: A method of producing a cylindrical laminated winding with radial slots for electrical machines is disclosed. The method includes providing a strip of conducting material, cutting cuts in a strip where the cuts form the radial slots of the laminated winding, and winding the strip to form the cylindrical laminated winding whereby a radial distance is enclosed between adjacent winding turns. A laminated winding for an electrical machine is also disclosed, and includes a strip of conducting material. The strip is wound in a cylindrical manner and is provided with cuts which are located between winding turns of the laminated winding such that they together form continuous radial slots, wherein a radial distance is enclosed between adjacent winding turns.
    Type: Application
    Filed: June 20, 2013
    Publication date: December 26, 2013
    Inventor: Conny HOGMARK
  • Publication number: 20130313939
    Abstract: A motor includes a plate-like insulating member that is interposed between coils located next to each other in the circumferential direction. Elastically deformable small protrusions, which protrude radially inward, are formed at an inner side portion of the insulating member, the inner side portion contacting inner covering portions of the insulators. The small protrusions are formed such that the insulating member is allowed to be inserted between the coils from the axial direction when the small protrusions are elastically deformed and the small protrusions are engaged with axial end faces of the inner covering portions.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 28, 2013
    Applicant: JTEKT CORPORATION
    Inventor: Akira HIRAMITSU
  • Publication number: 20130313940
    Abstract: An electric motor is provided including a stator and an armature received within the stator for rotational movement within the stator. The armature includes an armature shaft on which a commutator is mounted, and a lamination stack also mounted on the armature shaft and having radially extending teeth that form slots therebetween. The armature further includes end insulator arranged at an end of the lamination stack, the end insulator having a base portion fitted around the armature shaft and insulating teeth corresponding to the radially extending teeth of the lamination stack. A set of coils are wound in the lamination stack slots and the end insulator slots. In an embodiment, at least a portion of the insulating teeth has a greater thickness than at least a portion of the base portion. In another embodiment, at least one of said insulating teeth has a greater thickness than at least another of said insulating teeth. In yet another embodiment, the end insulator has a uniform thickness of at least 5 mm.
    Type: Application
    Filed: May 22, 2013
    Publication date: November 28, 2013
    Applicant: Black & Decker Inc.
    Inventors: Daniel F. Nace, Michael Marjomaa
  • Patent number: 8587176
    Abstract: A salient pole concentrated winding stator for an electric motor includes an annular stator core and a plurality of coils. The annular stator core includes a plurality of teeth. The plurality of coils are wound around the teeth such as to have different phases on the teeth adjacent in a circumferential direction. Each of the coils includes a first winding end and a second winding end, and at least one of the ends extends across the coil of a different phase. An end portion of the first winding end of one of the coils of the same phase that are adjacent in the circumferential direction is directly joined to an end portion of the second winding end of the other coil to form a joint portion without using an electric-power collection/distribution member. The joint portion is covered with an insulating material.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ken Kitaori, Nobuhiro Iitaka
  • Patent number: 8587177
    Abstract: A stator includes a stator core and a distributed winding type multi-phase coil. This coil includes unit coils made by winding a flat conductor wire in plural turns. The unit coils are mounted in slots of the stator core and connected with each other. Each unit coil includes an outer-layer coil and an inner-layer coil each being concentrically wound. Those two layer coils are made of a single continuous flat conductor wire. A winding start portion of the outer-layer coil and a winding end portion of the inner-layer coil form first and second connection end portions of the unit coil respectively. The first and second connection end portions are located separately on both edges of the unit coil above an upper end face of the stator core. The first connection end portion is placed close to an inner circumference of the stator core and the second connection end portion is placed close to an outer circumference of the stator core.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: November 19, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Kitamura, Atsushi Watanabe, Fujio Ando, Masayoshi Haga