Lap Patents (Class 310/206)
  • Patent number: 10491056
    Abstract: A stator in which stator coils are formed by a plurality of unit coils arranged so as to be shifted from each other in the circumferential direction and each having: a first slot-accommodated portion; a second slot-accommodated portion; a first terminal wire extending from the first slot-accommodated portion; a second terminal wire extending from the second slot-accommodated portion and shifted from the first terminal wire by one line of a conductive wire; a terminal-side coil end portion; and first and second anti-terminal-side coil end portions, wherein the first terminal wire and the second terminal wire of the respective different unit coils are joined with each other.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: November 26, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Naohiro Motoishi, Hiroyuki Akita, Koji Kawamura, Akira Hashimoto, Hironori Tsuiki, Wakaki Miyaji, Koji Tamura
  • Patent number: 9035526
    Abstract: In one possible implementation, a method for forming a motor winding is provided which includes compressing a Litz wire to form a compacted Litz wire and forming the winding with the compacted Litz wire. In one possible embodiment, a motor winding is provided that has a high density multi-conductor wire bundle comprises of compacted Litz wire.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: May 19, 2015
    Assignee: AeroVironment, Inc.
    Inventors: Wally Ewald Rippel, Zaher Abdallah Daboussi, Bradford M. Hori, Scott Garret Berman, Bart Dean Hibbs, Sr.
  • Patent number: 8946964
    Abstract: The invention incorporates a modular winding system for an electrical machine that includes a plurality of readily assembled modular windings for engaging a plurality of stator teeth of the machine. Windings comprise a pair of opposed legs terminating in upper and lower flanges, and are readily secured together to make consistent electrical contact between adjacent windings.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: February 3, 2015
    Inventor: Christopher Moore
  • Publication number: 20140265712
    Abstract: An electric motor has a rotatable armature having two pairs of poles, including a lamination stack which has a shape which is symmetrical about its axis and which forms twenty radial teeth and twenty slots and which has, associated therewith, a commutator with twenty segments, and a distributed closed winding, the conductors of which extend into the slots and are connected to the segments of the commutator in a predetermined manner. The winding of the armature has a lap-type winding or coil section connected to two adjacent segments of the commutator and, in series therewith, a plurality of wave-type winding sections or coils. All of these sections or coils encompass a same number of slots.
    Type: Application
    Filed: May 28, 2014
    Publication date: September 18, 2014
    Applicant: Johnson Electric S.A.
    Inventors: Gian Carlo MAGNETTI, Daniele Paolo Dal Colle
  • Publication number: 20140042864
    Abstract: A DC motor has a stator including two magnets arranged in a circumferential direction. An armature includes an armature core having eight slots arranged in a circumferential direction and radially facing the magnets. A commutator rotates integrally with the armature core and includes four segments separated in the circumferential direction by four grooves arranged in the circumferential direction. Coils are wound in a distributed winding in the slots. Two brushes contact the segments. Two coils, which are arranged at an interval of electric angle 180° and connected in series to each other, are connected to two of the segments that are electrically short circuited by each of the brushes so that the two coils extend between the segments. Each groove is located at a position deviated from a position separated by electric angle 180° in the circumferential direction from another one of the grooves.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: ASMO CO., LTD.
    Inventor: Tetsuaki ICHIKAWA
  • Patent number: 8531077
    Abstract: A stator coil production method using a plurality of shaping press pairs. A stator coil is made up of in-slot portions to be disposed in slots of a stator core and coil-end portions each of which extends every adjacent two of the in-slot portions. Each of the shaping press pairs has a die and a punch disposed on both sides of a conductor wire travel path. The method includes a first step of moving the die and the punch close to each other to shape a portion of a conductor wire into one of the coil-end portions, and a second step of bringing adjacent two of the shaping press pairs close to each other and simultaneously moving one of the adjacent two of the shaping press pairs in a direction perpendicular to the conductor wire to shape a portion of the conductor wire into one of the in-slot portion.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: September 10, 2013
    Assignee: Denso Corporation
    Inventors: Yusuke Hara, Daisuke Okushita, Takao Takeuchi, Kiyokazu Futami, Satoshi Nakamura, Fumihiro Nakano
  • Publication number: 20130193797
    Abstract: A DC electric motor has a stack of laminations defining a rotor with at least two pairs of poles and an even number of slots at least equal to 8. The rotor also has a commutator with an even number of segments and a closed distributed rotor winding. The winding extends in the slots and is connected in a predetermined manner to the segments of the commutator. The rotor winding has a winding section of the lap type, connected to two consecutive segments of the commutator and, in series with this, a plurality of winding sections of the wave type. These winding sections all span an identical number of slots.
    Type: Application
    Filed: January 25, 2013
    Publication date: August 1, 2013
    Applicant: Johnson Electric S.A.
    Inventor: Johnson Electric S.A.
  • Patent number: 8436506
    Abstract: A stator for an electric motor includes a stator coil including a wire pair with respective ends that are joined with a ring. The ring is positioned around the wire pair and joined to the wire pair by a metal joining process.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: May 7, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Pei-Chung Wang, John S. Agapiou, John Patrick Spicer
  • Patent number: 8421295
    Abstract: A stator for an electric rotating machine is provided which is equipped with a stator coil. The stator coil has a plurality of in-slot portions arrayed within each of slots formed in a stator core in a radial direction of the stator core. Adjacent two of the in-slot portions disposed in each of the slots have radially-facing surfaces which extend in non-parallel to one another at least one of ends of the in-slot portions. The non-parallel orientation of the radially-facing surfaces avoids close contact between entire areas thereof when the in-slot portions move undesirably within the slot in the radial direction of the stator core. In other words, a gap is kept between the radially-facing surfaces and serves as a radiator to dissipate heat, as generated in the in-slot portions.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: April 16, 2013
    Assignee: Denso Corporation
    Inventors: Nobuhiro Asano, Atsuo Ishizuka
  • Patent number: 8294324
    Abstract: A rotating machinery is to be provided wherein coils can be wound round a stator core in a minimized state of connected parts. In a rotating machinery comprising a stator formed annularly and a rotor disposed rotatably on the inner periphery side of the stator, the stator comprises a stator core, the stator core having in the circumferential direction a plurality of slots each having a coil inserting portion on the inner periphery side, and coils wound by lap winding within the slots, at least the lap-wound winding portion of the coils in each slot being constituted by a continuous line and wound at a coil end so as to straddle the inner periphery side and the outer periphery side of the slot. According to this construction there is no increase in the number of connected parts even if the number of turns in the winding portion is increased.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: October 23, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Ishigami, Takashi Naganawa, Kenichi Nakayama, Tsuyoshi Goto
  • Publication number: 20120007462
    Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.
    Type: Application
    Filed: July 25, 2011
    Publication date: January 12, 2012
    Applicant: DENSO CORPORATION
    Inventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
  • Patent number: 8080910
    Abstract: A motor for a compressor includes a rotor and a stator disposed radial outside of the rotor. The stator includes a stator core having oppositely facing axial end faces, insulators disposed so as to face the end faces, and coils wound on the stator core and the insulators. Each of the insulators has an annular part, a plurality of teeth protruding radially inwardly from an inner circumferential surface of the annular part at specified circumferential intervals, an outer circumferential wall having one end fixed to an end face of the annular part, and protrusions disposed on an outer circumferential surface of an outer circumferential wall of an insulator. At least one lead wire of the coils is drawn out to an outer circumferential side of the outer circumferential wall, guided along the outer circumferential wall, and passed on a side of the protrusions facing the stator core.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: December 20, 2011
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Tsukamoto, Hiroki Shirasaka, Hidemi Tanji
  • Patent number: 8008829
    Abstract: In an armature, the upper and lower coil pieces in one half of the parallel circuits are located at the 1st, 4th, 6th, 7th, 9th, 12th and 14th positions, and the upper and lower coil pieces in remaining half of the parallel circuits are located at the 2nd, 3rd, 5th, 8th, 10th, 11th and 13th positions, when relative positions of the upper and lower coil pieces in each phase belt are indicated by positions counted in a direction separating away from a pole center.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: August 30, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Tokumasu, Masafumi Fujita, Takashi Ueda, Mikio Kakiuchi
  • Patent number: 7911106
    Abstract: A rotary electric machine according to present invention comprises a rotor and a stator disposed around the rotor in which the stator includes a stator core having, along its inner periphery region, a plurality of axially extending stator slots and an armature winding wound through the stator slots. In this rotary electric machine, each stator slot contains four radially layered armature bars; each armature winding is formed by electrically connecting at least one of the armature bars in a first slot and at least one of the armature bars in a second slot to each other; and the armature bars of a pair specified in accordance with a required output voltage of the rotary electric machine are connected to each other with a connecting piece.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: March 22, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Takahashi, Masami Sukeda, Mitsuru Saeki, Kenichi Hattori
  • Publication number: 20110025164
    Abstract: A rotating electric machine comprises a stator in which a stator winding is inserted in a plurality of slots extending in an axial direction in an inner circumference of a stator core, and a rotor that is rotatable in the stator. A plurality of the stator windings are constituted with continuously wound coils in which rectangular conductors are connected by cross-over conductors spanning over the plurality of slots, and end positions of the cross-over conductors vary in the circumferential direction of the stator.
    Type: Application
    Filed: November 27, 2008
    Publication date: February 3, 2011
    Inventors: Yuichiro Tanaka, Takashi Ishigami, Takashi Naganawa, Hiromichi Hiramatsu
  • Patent number: 7834508
    Abstract: In an armature, the upper and lower coil pieces in the first and third parallel circuits are located at the 1st, 4th, 6th, 7th, 10th and 12th positions, and the upper and lower coil pieces in the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 8th, 9th and 11th positions, when relative positions of the upper and lower coil pieces in one of the first and second phase belts are indicated by positions counted in a direction separating away from a center of a pole.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: November 16, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Tokumasu, Masafumi Fujita, Mikio Kakiuchi
  • Patent number: 7750525
    Abstract: An electric rotating machine comprising a stator core having a plurality of slots that are equally spaced on the inner surface of the stator core in the peripheral direction, a rotor that rotates inside the stator core, and an armature winding that is applied to each of the slots, wherein the armature winding is made up with a plurality of serially-connected single-turn coils that are respectively applied to the slots and the serially-connected coils of respective phases are connected in parallel.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: July 6, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Takahashi, Mitsuru Saeki, Kenichi Hattori, Masami Sukeda, Akihito Nakahara
  • Patent number: 7687962
    Abstract: In this stator, first and second U-phase loop windings and first and second W-phase loop windings are short-pitch wave windings, and the width in the circumferential direction of the slot between the U and V-phases in which the loop windings are disposed and the slot between the V and W-phases in which the loop windings are disposed is set to a value that is ½ the width in the circumferential direction of the slot between the W and U-phases in which the loop windings are disposed. The ratio of the first winding turns number of the loop windings and the second winding turns number of the loop windings is set so that when having added the induced voltages by the loop windings or having added the induced voltages by the loop windings in the slots, the phase difference of the induced voltages obtained by addition is 120 electrical degrees.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: March 30, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Nobuyuki Imai, Tadanobu Takahashi, Shigeru Tajima, Junji Inoue
  • Publication number: 20100060098
    Abstract: In a stator for an electric machine and a method for manufacturing a winding for the stator of such an electric machine L-shaped wire segments having a rectangular cross-section are inserted into slots arranged around the stator The long leg of the L-shaped wire segment is then inserted, into or through, a respective slot and the wire segment is then bent into an S-shape resulting in a second short leg while reducing a length of the long leg. The first short leg of each one of a majority of the wire segments is then electrically connected to the first short leg of another one of the wire segments and the second short leg of each one of a majority of the wire segments is electrically connected to the second short leg of yet another one of the wire segments.
    Type: Application
    Filed: September 8, 2008
    Publication date: March 11, 2010
    Inventors: Robert Inderka, Franz Nietfeld, Jingchuan Li
  • Patent number: 7619345
    Abstract: A stator coil assembly includes a cylindrical support tube with first and second pluralities of stator coils disposed radially around the support tube. Each stator coil includes first, second, third, and fourth linear segments, each having first and second planar broad sides. The second and fourth linear segments extend in parallel along a first axis with the first and second broad sides of the second and fourth linear segments lying in a common plane. The first and third linear segments extend in parallel along a second axis perpendicular to the first axis. Transition segments having first and second planar broad sides each join a pair of linear segments. The transition segments of the first and second pluralities of stator coils define curvatures toward and away from the center axis, respectively, such that the first and third linear segments are disposed at a substantially equal radial distance from the center axis.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: November 17, 2009
    Assignee: American Superconductor Corporation
    Inventors: Swarn S. Kalsi, Dariusz Antoni Bushko
  • Patent number: 7555893
    Abstract: To provide an aircraft propulsion system which can secure the optimum thrust and thrust vector for flight conditions, as well as the optimum sectional area for the engine, and which is highly compatible with the environment. An electrical generator is coupled to a turbofan engine, the electrical generator is driven by output power of the turbofan engine to output electric power, and an electromagnetic driving fan is driven by the electric power. On the other hand, after bringing each of coils in the electromagnetic driving fan to a superconductive state, liquid hydrogen is introduced to a heat exchanger, collects the energy of exhaust as heat, is then vaporized, and thereafter supplied to a combustor and to a fuel cell. Further, the electromagnetic driving fan is changed in its rotational phase by a rotating mechanism portion, is made movable in a width direction of a wing and a wing chord direction by a slide mechanism portion, and can be stored inside or outside the wing by a storage mechanism portion.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: July 7, 2009
    Assignees: Japan Aerospace Exploration Agency, Nihon University
    Inventors: Keiichi Okai, Takeshi Tagashira, Ryoji Yanagi, Hiroshi Nomura
  • Patent number: 7554241
    Abstract: A motor with three gaps produces higher torque than existing one or two gap motors. The motor uses both one radial and two axial gaps to produce torque. A single stator is provided with an essentially “U” shaped rotor shell having permanent magnets with back iron. The stator has loops of coil windings separated by pole pieces. Current flowing in three segments of the coils interacts with the fields from the permanent magnets to produce more torque. The plane of the coils extends through the centerline of the stator. In a given plane through the motor axis, the same polarity of the magnets on the rotor face the stator.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: June 30, 2009
    Inventor: Dantam K. Rao
  • Publication number: 20090160286
    Abstract: The invention relates to a method for producing a stator winding (100) for a stator of an electrical machine, in particular for a motor vehicle. Provision is made for the at least one section (102) of the stator winding (100) to be positioned in one plane, and for regions of the section (A, B, C) to be bent toward one another along at least one folding line (108), with the result that a lap winding is produced. The invention also relates to a corresponding stator winding (100) and an electrical machine with a stator winding (100).
    Type: Application
    Filed: November 10, 2006
    Publication date: June 25, 2009
    Inventors: Gert Wolf, Thomas Berger
  • Publication number: 20080174199
    Abstract: A rotating machinery is to be provided wherein coils can be wound round a stator core in a minimized state of connected parts. In a rotating machinery comprising a stator formed annularly and a rotor disposed rotatably on the inner periphery side of the stator, the stator comprises a stator core, the stator core having in the circumferential direction a plurality of slots each having a coil inserting portion on the inner periphery side, and coils wound by lap winding within the slots, at least the lap-wound winding portion of the coils in each slot being constituted by a continuous line and wound at a coil end so as to straddle the inner periphery side and the outer periphery side of the slot. According to this construction there is no increase in the number of connected parts even if the number of turns in the winding portion is increased.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 24, 2008
    Applicant: Hitachi, Ltd.
    Inventors: Takashi ISHIGAMI, Takashi Naganawa, Kenichi Nakayama, Tsuyoshi Goto
  • Publication number: 20080054750
    Abstract: In a rotary electric machine, at least one of first and second ends of each conductor segment is at least partially joined to at least one of the first and second ends of a corresponding another one of the conductor segments to provide the stator winding including a plurality of joint portions of the plurality of conductor segments. An insulating film covers each of the conductor segments except for at least the joint portions of the stator winding. At least part of the insulating film of each of the conductor segments located close to a corresponding one of the joint portions contains an evaporatable component. An amount in ppm of the evaporatable component contained in the at least part of the insulating film is adjusted to be equal to or lower than 20000 ppm.
    Type: Application
    Filed: August 27, 2007
    Publication date: March 6, 2008
    Applicant: DENSO CORPORATION
    Inventor: Akihito Koike
  • Patent number: 7282831
    Abstract: A small generator with collective multiple magnetic poles includes a magnet, multiple magnetic poles arranged in an annular shape and facing to the magnet, an annular iron core having its outer circumference combined with the multiple magnetic poles spaced apart and equidistantly. The iron core forms magnetic circuits for the magnetic poles so as to let magnetic lines of force to pass through. A sheet-shaped coil is combined on each magnetic pole so that when the magnet is rotated around the iron core with the magnetic poles, the sheet-shaped coil may generate alternate electric current. The sheet-shaped coils are quickly made by mechanical process, with magnetic wires requited for the coils reduced a lot.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: October 16, 2007
    Inventors: Yi-Yin Lin, Hubert Chen, Kuei-Tang Liao
  • Patent number: 7242124
    Abstract: A polyphase sequentially joined-segment coil of a rotary electric machine and a production method thereof are provided. The coil is made up of a plurality of conductor segments joined in series. Each of the conductor segments a head projecting from a stator core, a pair of legs, and a pair of ends projecting from the stator core. The heads are of two types: a large-sized head and a small-sized head extending inside the large-sized head. This structure permits the length of the conductor segments in an axial direction of the core to be decreased and improves cooling capability of the machine and coil losses.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: July 10, 2007
    Assignee: Denso Corporation
    Inventors: Shinichi Ogawa, Akira Fukushima
  • Patent number: 7132775
    Abstract: The present invention provides a dynamoelectric stator and a method for the manufacture thereof enabling electrical insulation properties to be improved by forming slot-housed portions with a racetrack-shaped cross section to suppress damage to an electrically-insulating coating arising during mounting of a stator winding to a stator core. The construction is such that the slot-housed portions of the stator winding are formed with the racetrack-shaped cross section, and are housed inside slots so as to line up in single columns in a radial direction with a longitudinal direction of the cross section of the slot-housed portions aligned in a circumferential direction.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: November 7, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsushi Oohashi, Takushi Takizawa, Yukiyoshi Ohnishi
  • Patent number: 7091644
    Abstract: A sequentially joined segment armature coil is provided which may be employed in an ac machine such as an ac motor or motor generator. The armature coil is equipped with three phase coils each of which is made up of a first and a second phase windings identical in number of turns. This structure permits the number of turns of the armature coil to be changed easily by changing a connection of the first and second phase winding between a series connection and a parallel connection or changing a connection of the phase coils between a star connection and a delta connection. The structure also enables terminal leads of the first and second phase windings of each of the phase coils to be collected and withdrawn outside the ac machine, thus facilitating ease of arrangement of the terminal leads.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: August 15, 2006
    Assignee: Denso Corporation
    Inventors: Akira Fukushima, Atsushi Umeda
  • Patent number: 7051420
    Abstract: An armature for a brush commutated electric motor having a distributed coil winding arrangement for reducing brush arcing and electromagnetic interference (EMI). The winding pattern involves segmenting each coil into first and second subcoil portions with differing pluralities of turns. Each subcoil portion is wound around separate pairs of spaced apart slots of a lamination stack. Adjacent coils are wound such that one subcoil portion of each is wound in a common slot to therefore form an overlapping arrangement of each pair of adjacently coils. The winding pattern serves to “shift” the resultant magnetic axes of each coil in such a manner so as to significantly reduce brush arcing and the EMI resulting therefrom. The reduction in EMI is sufficient to eliminate the need for EMI reducing components, such as chokes, which have typically been required to maintain EMI to acceptably low levels.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: May 30, 2006
    Assignee: Black & Decker Inc.
    Inventor: Ren Hong Wang
  • Patent number: 7000307
    Abstract: An armature for a brush commutated electric motor having a distributed coil winding arrangement for reducing brush arcing and electro-magnetic interference (EMI). The winding pattern involves segmenting each coil into first and second subcoil portions with differing pluralities of turns. Each subcoil portion is wound around separate pairs of spaced apart slots of a lamination stack. Adjacent coils are wound such that one subcoil portion of each is wound in a common slot to therefore form an overlapping arrangement of each pair of adjacently coils. The winding pattern serves to “shift” the resultant magnetic axes of each coil in such a manner so as to significantly reduce brush arcing and the EMI resulting therefrom. The reduction in EMI is sufficient to eliminate the need for EMI reducing components, such as chokes, which have typically been required to maintain EMI to acceptably low levels.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: February 21, 2006
    Assignee: Black & Decker Inc.
    Inventor: Ren Hong Wang
  • Patent number: 6971153
    Abstract: A method of manufacturing a winding of a rotary electric machine includes steps of pressing a portion of a conductor segment in a predetermined direction to reduce its dimension in the direction, inserting the conductor segment into a slot of a stator core, bending the conductor segments and joining ends of the conductor segments. In the pressing step, the conductor segment is pressed with a punch in a condition that it is held in a die that has curved inside corner portions to restrict deformation of corners of the pressed portion.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: December 6, 2005
    Assignee: Denso Corporation
    Inventors: Takashi Tokizawa, Mitsuru Kato, Yoshinori Nakamura, Yasunori Kitakado, Motohiro Murahashi
  • Patent number: 6910258
    Abstract: A method is disclosed for fitting a rotor enclosure over at least one assembly of field windings mounted on a rotor core, said method comprising the steps: applying a force to elastically reduce a circumference of the at least one assembly of field windings mounted on the rotor core, where the reduction in circumference is greater than a circumference reduction due to just eliminating clearances between adjacent end-turns of windings; generating a clearance between the field windings and the rotor enclosure due to the application of the force; axially sliding the rotor enclosure over the at least one assembly of field windings while the circumference is reduced, and releasing the force to allow the circumference of the at least one assembly of field windings to expand and cause the enclosure to tightly fit on the at least one assembly of field windings.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: June 28, 2005
    Assignee: General Electric Company
    Inventors: Yu Wang, Richard Nils Dawson, Christopher Anthony Kaminski, Robert John Nygard, James Pellegrino Alexander
  • Patent number: 6906479
    Abstract: A rotating electrical machine, such as an aircraft starter-generator, includes an exciter that has its stator windings divided into a number of sections. A plurality of switches are electrically coupled to the exciter stator winding sections and are configured and controlled so that the exciter stator winding sections may be selectively coupled in series or in parallel with one another, and selectively coupled to receive either DC or AC power.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: June 14, 2005
    Assignee: Honeywell International, Inc.
    Inventors: Mingzhou Xu, Wayne T. Pearson, Cristian E. Anghel, Nicolae Morcov
  • Patent number: 6856063
    Abstract: A multiple phase winding for an electromotive device comprised of individual phase windings. Each phase winding includes multiple layers of conductors and defines working length portions and interior and exterior end-turn portions, wherein at least one set of end-turn portions defines notches which cut across the height dimension of all the layers of conductors. The notches of different phases intermesh. This geometry promotes low electrical resistance within the phase windings and good conductive heat transfer between the multiple phase winding and the housing of the electromotive device, allowing higher power density from the device.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: February 15, 2005
    Assignee: Magnetic Power-Motion, LLC
    Inventors: Patrick Kelecy, Paul Receveur
  • Patent number: 6841914
    Abstract: An arc length in contact with a commutator of two brushes in a rotational direction of a motor is defined as not more than 5% of an outer rim length or circumference of the commutator, i.e., not more than ?A/2O, where A is an outside diameter of the commutator. A number of shorted segments of the commutator, which short is caused by the brush, can be minimized so that reduction in output of the motor can be prevented. As a result, the motor employed in a car product or an electric tool can be downsized and made lighter.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: January 11, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Maeda, Shozo Sakon, Kazuo Toya
  • Publication number: 20040164638
    Abstract: To realize a small-sized coreless motor featuring excellence in responsiveness and controllability, capability of obtaining greater rotating torque compared with driving power supplied to the coil, great intensity, ease in assembly and high energy efficiency, a coreless motor of the present invention comprising; each of coils 8, 8 comprises a flat portion, which consists of a winding unit that confronts the upper and lower faces of a ring-shaped magnet 5 and whose plane part forms an arc shape, and a curved-and-folded portion, which consists of a winding unit that confronts the external circumstance side face of the magnet, with the section from one end of the lead wire constituting these winding units to the other end being arranged to compose a continuous, hollow unit; wherein the flat portion in the lower part of these coils 8, 8 is fitted to thin-sheet-shaped flange 9a below coil holder 9, which is installed around the rotating axis 4, so that multiple coils are arranged along the external circumference d
    Type: Application
    Filed: December 16, 2003
    Publication date: August 26, 2004
    Inventor: Keisuke Asaba
  • Patent number: 6774525
    Abstract: The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, “n” is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential direction.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: August 10, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshinori Tanaka, Akihiro Daikoku, Kyouhei Yamamoto, Kei Yonemori
  • Patent number: 6710501
    Abstract: In a stator for a dynamo-electric machine, a winding includes a conductor having a rectangular cross-sectional shape in a direction perpendicular to an axial direction, an overall shape of the conductor being a crank shape when flattened out, and the conductor includes straight portions laminated within slots, and bridge portions connecting the straight portions to each other, the bridge portions protruding from both end surfaces of the stator core in the axial direction.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: March 23, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuhiko Kusumoto, Keiichi Komurasaki, Yuji Nakahara, Hiroyuki Akita, Kazuhiro Odawara
  • Patent number: 6700282
    Abstract: A rotary electric machine having improved coil connection reliability, simplified coil end processing steps and improved workability based on an improved components mounting method is to be provided. Flat type conductors are inserted in a stacked state into each of slots formed in a stator core, and a side face of a preceding-stage winding terminal end and a side face of a succeeding-stage winding start end in the flat type conductors are lapped and connected to constitute an assembly of stator coils. The stator coil assembly comprises plural coil groups, and one electrode is connected to one conductor end in the coil groups, while another electrode is moved in a successive manner to connect preceding- and succeeding-stage winding terminal and start ends of the conductors. Further, an insulating ring with crossover conductors laid thereon is combined with such stator coil assembly to connect winding terminal and start ends of the stator coil assembly, thereby constituting a predetermined winding circuit.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: March 2, 2004
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Yoshimi Mori, Takashi Yasuhara, Osamu Koizumi, Masaaki Hayashi, Shinji Kikawa
  • Patent number: 6611073
    Abstract: A rotor includes four magnetic poles provided in a rotational direction at intervals of 90 degrees. A stator includes a winding group for rotation and a winding group for levitation. Each of the winding groups has concentrated windings spaced at intervals of 30 degrees in a rotational direction to provide induction conductive winding sections at twelve locations. Each two of the induction conductive winding sections spaced at an interval of 90 degrees among the twelve induction conductive winding sections are connected to form one winding set such that six winding sets are formed in total in each of the winding groups. Current for rotation and current for levitation are conducted through the six winding sets in the windings for rotation and levitation to perform rotation and levitation controls of the rotor.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: August 26, 2003
    Assignee: Sankyo Seiki Mfg. Co., Ltd.
    Inventors: Hideki Kanebako, Yohji Okada, Keisuke Abe
  • Publication number: 20030127935
    Abstract: A rotary electric machine having improved coil connection reliability, simplified coil end processing steps and improved workability based on an improved components mounting method is to be provided. Flat type conductors are inserted in a stacked state into each of slots formed in a stator core, and a side face of a preceding-stage winding terminal end and a side face of a succeeding-stage winding start end in the flat type conductors are lapped and connected to constitute an assembly of stator coils. The stator coil assembly comprises plural coil groups, and one electrode is connected to one conductor end in the coil groups, while another electrode is moved in a successive manner to connect preceding- and succeeding-stage winding terminal and start ends of the conductors. Further, an insulating ring with crossover conductors laid thereon is combined with such stator coil assembly to connect winding terminal and start ends of the stator coil assembly, thereby constituting a predetermined winding circuit.
    Type: Application
    Filed: October 30, 2002
    Publication date: July 10, 2003
    Applicant: HITACHI, LTD
    Inventors: Yoshimi Mori, Takashi Yasuhara, Osamu Koizumi, Masaaki Hayashi, Shinji Kikawa
  • Patent number: 6548933
    Abstract: A linear shape straight angle line is transformed to form U-shape configuration in advance and by sandwiching a stator tooth portion to adjacent slots linear shape two sides are inserted and using a thin plate rod shape chip between both ends of U-shape side of the above stated coil is connected and then the coil is formed to have one winding close circuit. The plural coils are inserted and as stated in above between the both ends of an anti-U-shape side is connected, and a stator coil for forming a predetermined winding turn number is obtained. When an end face of the anti-U-shape side and the thin plate shape chip are overlapped and connected, a plate thickness of a portion in which they are overlapped is reduced by half respectively, and when they are overlapped, it becomes the plate thickness which corresponds to a plate thickness of the above stated straight angle line coil. A length of a coil end portion can be shortened widely.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: April 15, 2003
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Takashi Yasuhara, Suetarou Shibukawa, Osamu Koizumi, Hiromichi Anan, Syuichi Hara, Toshiaki Ueda, Yasuhiko Kimura, Takefumi Oowada, Hidemitsu Kobayashi, Hisashi Kondo
  • Patent number: 6545377
    Abstract: The invention relates to a coil comprising current-conducting turns (2) and cooling means (3) for cooling the coil. To improve the cooling efficiency, the coil comprises a plurality of heat conducting foil turns (4). These foil turns can be thermally connected to a cooling channel with a cooling fluid. In a preferred embodiment, the heat-conducting foil turns (4) are also the current-conducting turns (2).
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: April 8, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Theodorus Hubertus Josephus Bisschops
  • Patent number: 6515393
    Abstract: Six single phase winding portions are installed in slots disposed at a ratio of two per phase per pole. Each single-phase winding portion has two wave windings formed by winding a conductor wire for a predetermined number of winds into a wave-shaped pattern composed of slot-housed portions disposed at a pitch of six slots in a circumferential direction and crossover portions linking together end portions of adjacent pairs of the slot-housed portions alternately relative to an axial direction, the wave windings being offset by six slots from each other circumferentially and installed in the slots such that the crossover portions face each other axially.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: February 4, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihito Asao, Atsushi Oohashi, Katsumi Adachi
  • Patent number: 6459187
    Abstract: A stator core is provided with a core abutting portion extending axially such that the stator core becomes an annular shape by abutting end surfaces of a parallelepiped laminated body, and a polyphase stator winding is provided with a winding connection portion axially aligned with the core abutting portion.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: October 1, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsushi Oohashi, Katsumi Adachi
  • Publication number: 20020079774
    Abstract: The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, “n” is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential direction.
    Type: Application
    Filed: August 17, 2001
    Publication date: June 27, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Toshinori Tanaka, Akihiro Daikoku, Kyouhei Yamamoto, Kei Yonemori
  • Publication number: 20020079775
    Abstract: The invention relates to a method of manufacturing a band coil by means of a material-removing process performed on the coils so as to obtain a band coil which has a profile in the direction of the coil axis. Such a process may be a discharge process, an etching process or a mechanical grinding process. The obtained band coils may have such a shape that certain coil sides are effective whereas other coil sides are interfering as little as possible. Such band coils can be very successful in planar motors.
    Type: Application
    Filed: December 6, 2001
    Publication date: June 27, 2002
    Inventors: Henricus Wilhelmus Aloysius Janssen, Johannes Petrus Martinus Bernardus Vermeulen, Fransiscus Marinus Andrea Maria Van Gaal, Petrus Carolus Maria Frissen
  • Patent number: 6388357
    Abstract: In a three phase armature winding for a dynamo-electric machine, each phase of the winding comprises a first phase belt for (3n+2) slots and a second phase belt for (3n+1) slots. Three parallel connected circuits each constituting series connected coils per circuit. Each series coil per circuit has an upper coil piece and a lower coil piece connected thereto in series. Each of the upper and lower coil pieces has one connection side end portion and other non-connection side end portion. The first phase belt houses (3n+2) series coils of the circuits and the second phase belt houses (3n+1) series coils thereof. When the circuits in each phase are designated circuit numbers, the circuits in each phase are arranged so that a circuit sequence of the upper coil pieces in each phase belt and a circuit sequence of the lower coil pieces therein are substantially the same.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: May 14, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Tokumasu, Hisakazu Matsumoto
  • Patent number: 6388355
    Abstract: A motor for an electric power steering assembly includes a yoke, a multipolar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator comprising a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: May 14, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto