Having Slot Of Particular Shape Patents (Class 310/216.069)
  • Patent number: 10355538
    Abstract: A brushless motor includes: a stator core having a cylindrical yoke portion and a teeth portion having a shape protruding from an inner circumferential surface of the yoke portion; and a rotor that is disposed inside the stator core, spaced apart from the teeth portion, and uses a center axis of the yoke portion as an axis of rotation. The yoke portion includes, on its outer circumferential surface, a notch portion at a position on the back side of the teeth portion. The notch portion has a circumferential width smaller than a circumferential width of the teeth portion.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: July 16, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kota Kitamura, Hidenori Shimizu, Atsushi Takeyama, Motoharu Muto, Hiroyuki Tsubakimoto, Koichi Hashimoto
  • Patent number: 10199887
    Abstract: A core segment linked body when opened out rectilinearly is configured: such that a distance between adjacent width reduced portions is greater than a width dimension of width expanded portions when adjacent core segments are in an expanded position, and the distance between the adjacent width reduced portions is less than the width dimension of the width expanded portions when the adjacent core segments are in a contracted position; and so as to satisfy (te?tn)/?s?>0, and 0<(te?tn)/te?0.27, where ?s? is a distance between center lines of the adjacent magnetic pole teeth in the expanded position, te is a width dimension of tooth main portions, and tn is the width dimension of the width reduced portions.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: February 5, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Ryuichi Takiguchi, Akira Hashimoto, Takanori Komatsu, Katsunori Oki, Satoru Hasegawa, Susumu Oshima
  • Patent number: 9960650
    Abstract: In an armature coil according to the present invention and, more particularly, in an armature coil including a plurality of coil conductors wound around a plurality of slots which are formed in a stator core and opened on the radially inner side, the circumferential width of the plurality of the coil conductors is formed in a substantially trapezoidal shape which gets narrower toward the radially inner side and the cross-sectional areas of the plurality of the coil conductors in the slot are each substantially the same and the circumferential width thereof is formed narrower as the coil conductor is arranged toward the radially inner side; and one coil conductor is formed in a convex shape and another coil conductor is formed in a concave shape along the convex shape.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: May 1, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Tamura, Shuichi Tamura, Akihiro Yamamura, Issei Doi, Hiroyuki Matsuo, Yasukazu Nishimura, Sachiko Kawasaki, Akihiko Mori
  • Patent number: 9373982
    Abstract: A tubular body for an electrical machine is provided. The tubular body comprises a curved surface area, a first tooth and a second tooth. The tubular body is arrangable with respect to a further tubular body such that one of the tubular body or the further tubular body is rotatable with respect to the other one around a rotary axis. The first tooth and the second tooth extend from the curved surface area along a radial direction with respect to the rotary axis. The first tooth comprises a first side wall facing a second side wall of the second tooth, wherein the first side wall comprises a first section which is parallel to the second side wall such that a circumferential distance between the first section and the second side wall is constant along the radial direction.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: June 21, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Lijian Wu, Zhen Ping Xia
  • Publication number: 20150130322
    Abstract: A tooth of a stator has a tapered shape in which a tooth width decreases toward a distal end portion thereof. A winding is formed of an edgewise winding wound around the tooth in a row. The winding is supplied with power so that a terminal on a base portion side of the tooth may have a higher voltage than that of a terminal on the distal end portion side thereof. A tooth width Th of the base portion is set within the range of Tmin<Th<1.25Tha defined by a tooth width Tha that maximizes an index using an outer radius and a core back width of a stator core, a clearance of the windings in the slot, a winding width, an air gap between the teeth and the winding, a pitch of the slot, and an inclination angle of the winding, and a permissible lower limit Tmin.
    Type: Application
    Filed: June 4, 2013
    Publication date: May 14, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Moriyuki Hazeyama, Hideaki Arita, Yoshihiro Miyama, Akihiro Daikoku
  • Patent number: 9013083
    Abstract: Provided is a permanent magnet type motor including: a rotor including a rotor core and a plurality of permanent magnets; a conducting circuit including a first electric conductor extending in an axial direction of the rotor and being disposed between permanent magnets in a circumferential direction of the rotor and a second electric conductor for connecting the first electric conductors electrically; and a stator disposed so as to be opposed to the rotor, including a stator core and an armature winding. A rotation angle is detected by measuring current flowing in the armature winding. The stator core is formed to have a shape in which, a slot pitch is defined by ?s=(2×?×Rs)/Ns, where an inner radius of the stator is represented by Rs and a number of slots is represented by Ns, a value Wsn obtained by dividing a slot opening width Ws by the slot pitch ?s satisfies “0.08?Wsn”.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: April 21, 2015
    Assignee: Mitsubishi Electic Corporation
    Inventors: Yusuke Morita, Masatsugu Nakano, Sachiko Kawasaki
  • Publication number: 20150084449
    Abstract: Obtain a rotary electric machine by which a share of coil slots for a stator winding in slots, which are formed in a stator core, can be increased, and heat generation at a central portion of a stator can be decreased. The stator winding is composed of coil slots, which are inserted to the slots, and coil ends extended toward the outside in the axis direction of the stator core; and the coil conductors of the coil slots are configured in such a way that cross-sectional areas at central portions in the axis direction are wider cross-sectional areas at both end portions, and the cross-sectional areas of the coil conductors are reduced along the coil slots from the central portions to the both end portions.
    Type: Application
    Filed: March 4, 2014
    Publication date: March 26, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yutaka IKURA, Shinkichi Sawa, Tatsuro Hino, Tetsuya Yokogawa, Atsushi Sakaue
  • Patent number: 8984742
    Abstract: A three dimensional soft magnetic metal mass suitable for milling is formed wrapping soft magnetic metal ribbon into a three dimensional shape and then applying adhesive to the three dimensional shape. The adhesive permeates the three dimensional shape. The adhesive is then cured. If the soft magnetic metal mass is made as a toroid, then it could be processed into an electromechanical component. The electro-mechanical component would then be suitable for use in very high frequency electric motors.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: March 24, 2015
    Assignee: Light Engineering, Inc.
    Inventors: Thomas J. Berwald, Kendall Scott Page
  • 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
  • Patent number: 8957555
    Abstract: A wind turbine rotary electric machine having a tubular body, in turn having a cylindrical wall; and a plurality of clips formed integrally with the cylindrical wall and configured so that each pair of facing clips defines a seat for housing an active sector.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: February 17, 2015
    Assignee: Wilic S.AR.L.
    Inventors: Otto Pabst, Matteo Casazza
  • Publication number: 20150008785
    Abstract: An armature for a rotating electric machine includes an armature core and an armature coil. The armature core includes a substantially annular main body disposed in radial opposition to a field of the machine and teeth extending from the main body radially toward the field. The armature coil is arranged between the teeth of the armature core. For each of the teeth, there are formed a protrusion and a pair of claws at a distal end of the tooth. The protrusion protrudes from a circumferentially central part of the distal end of the tooth radially toward the field. The claws extend, respectively on opposite circumferential sides of the protrusion, from the distal end of the tooth toward the field. Each of the claws has a smaller width at its distal end than at its proximal end and is arcuate-shaped so as to engage with and thereby retain the armature coil.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Akio MORI, Kazuhiro NOBATA, Masayoshi YAMAMOTO, Yoshiyasu KOZAKI, Noboru TANIGUCHI, Masayuki TAKIGUCHI
  • Publication number: 20150008786
    Abstract: A cogging torque can be significantly reduced in a three-phase permanent magnet-type synchronous motor. In a three-phase permanent magnet-type synchronous motor where a fraction of 2N/3P is not an integer assuming the number of magnetic poles of a rotator is P and the number of slots of a stator is N, the stator includes a tooth facing a surface of a magnetic pole of the rotator via a void and a tooth width of the tooth in the circumferential direction is approximately ½ of a slot pitch of the stator. In a three-phase permanent magnet-type synchronous motor of an outer rotor type, the tooth of the stator has a radial cross section with an approximately uniform shape from a tooth tip portion to a tooth root portion or a radial cross section with a larger tooth root portion than a tooth tip portion to allow mounting a winding unit from the tooth tip portion. The winding unit is preliminarily wound by a coil.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 8, 2015
    Applicant: CLEAN CRAFT LIMITED
    Inventor: Kenji Endo
  • Publication number: 20150001984
    Abstract: A method of manufacturing a stator assembly for an electrical machine, including the steps of: arranging a plurality of elongate wire segments in single file along the depth of a stator slot located between opposing walls of a pair of adjacent stator core teeth; compressing the wire segments substantially in a direction of the stator slot depth, whereby the wire segments are compacted into the stator slot; plastically deforming at least one of the wire segments, whereby a cross-section of the plastically deformed wire segment is expanded in a direction along which the opposing tooth walls are spaced from each other; and deforming the tip of at least one of the pair of adjacent stator core teeth to at least partially close up the stator slot upon the compressed wire segments and further compacting the wire segments into the stator slot.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventor: Michael D. Bradfield
  • Publication number: 20140346919
    Abstract: A tubular body for an electrical machine is provided. The tubular body comprises a curved surface area, a first tooth and a second tooth. The tubular body is arrangable with respect to a further tubular body such that one of the tubular body or the further tubular body is rotatable with respect to the other one around a rotary axis. The first tooth and the second tooth extend from the curved surface area along a radial direction with respect to the rotary axis, wherein the first tooth and the second tooth are spaced apart from each other along a circumferential direction around the rotary axis. The first tooth comprises a first side wall facing a second side wall of the second tooth, wherein the first side wall comprises a first section which is parallel to the second side wall such that a circumferential distance between the first section and the second side wall is constant along the radial direction.
    Type: Application
    Filed: May 19, 2014
    Publication date: November 27, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: LIJIAN WU, ZHEN PING XIA
  • Patent number: 8890387
    Abstract: An armature core of a stator has an annular portion and a plurality of teeth extending radially from the annular portion. A segment coil is configured by electrically connecting a plurality of segment conductors together. The segment conductors extend axially through slots S, each of which is defined between each adjacent pair of the teeth. Each of the teeth has a width adjustment portion for decreasing a slot width in a direction perpendicular to a radial direction in the radially inward direction.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: November 18, 2014
    Assignee: Asmo Co., Ltd.
    Inventors: Yoshimasa Kinpara, Noriyasu Nishio, Takahiro Yamamoto
  • Publication number: 20140300244
    Abstract: A rotating electrical machine includes a rotor and a stator. A permanent magnet is attached to the rotor. The stator opposes the rotor with a gap provided therebetween, and has an open slot that opens toward the rotor and in which a high-voltage wire is installed. The gap has a gap length at which the sum of losses including a surface loss that occur when the high-voltage wire is excited and the rotor is rotated at a high rotation speed is less than or equal to a threshold that corresponds to a target loss.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 9, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Daisuke MORISHITA
  • Publication number: 20140292123
    Abstract: A method of inserting a continuous conductor having a rectangular cross-section into slot segments formed in a stator core includes forming a core member having a plurality of slot segments each having an opening and inserting a stator winding having a plurality of phases into select ones of the slot segments. Each of the plurality of phases has at least one conductor including a plurality of substantially straight segments alternately connected by a plurality of end loop segments. A section of the at least one conductor includes three consecutive end loop segments and three consecutive straight segments formed from a single continuous conductor. The method further includes narrowing the opening of each of the plurality of slot segments by forming an annular stator core having a central axis. The three consecutive straight segments are substantially similarly radially spaced from the central axis.
    Type: Application
    Filed: June 11, 2014
    Publication date: October 2, 2014
    Inventors: Mark A. Stephenson, Kirk Neet
  • Publication number: 20140246944
    Abstract: A rotating electrical machine includes a stator having a stator core having a plurality of slots formed therein and a plurality of stator coils to be accommodated in the respective slots, and a rotor arranged on an inner peripheral side of the stator. The plurality of slots include a first slot and a second slot, and when a first ratio between the number of coils having the same phase to be accommodated within the first slot and the number of the plurality of coils exceeds a predetermined ratio, and a second ratio between the number of coils having the same phase to be accommodated in the second slot and the number of the plurality of coils is the predetermined ratio or lower, a width of a first slot opening that the first slot has so as to face the rotor side is 0 or wider, and is smaller than a width of a second slot opening that the second slot has so as to face the rotor side.
    Type: Application
    Filed: October 3, 2012
    Publication date: September 4, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Hidetoshi Koka, Satoshi Kikuchi, Yutaka Matsunobu, Keiji Oda, Yasuyuki Saito, Manabu Oshida
  • Publication number: 20140184015
    Abstract: A stator of a motor comprises a stator core including a plurality of plate members stacked together; the stator core including: a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a constant-width portion extending radially in a straight-line shape so as to have a constant circumferential width, a narrower portion having a circumferential width smaller than a circumferential width of the constant-width portion, and a clamp portion for securing the plurality of plate members to each other; and wherein at least a portion of the clamp portion is located in the narrower portion.
    Type: Application
    Filed: July 24, 2012
    Publication date: July 3, 2014
    Applicant: Panasonic Corporation
    Inventors: Takashi Ogawa, Yuichi Yoshikawa, Ikuo Ozaki, Toshiyuki Tamamura, Hirokazu Yamauchi
  • Publication number: 20140184010
    Abstract: The invention relates to a synchronous machine with hybridenergisation, in particular a generator for supplying the electrical system of a motor vehicle, comprising a laminated stator (16) with a multiphase stator winding (18) and a laminated rotor (20) with an energizer winding (29), which together with permanent magnets (24,25) around the rotor periphery, provides the energisation for the machine. According to the invention, favorable electrical and magnetic properties and an improvement in manufacturing conditions of the machine can be achieved, wherein the grooves (40) for the energiser windings (29) are disproportionately enlarged in relation to the groove base (44) and are preferably bell-shaped.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Kurt Reutlinger, Markus Heidrich
  • Patent number: 8766506
    Abstract: A stator core includes a cylindrical yoke and teeth that are disposed in an inner circumference surface of the yoke along its circumferential direction and that are subjected to magnetic flux from the rotor of the rotating electrical device. The teeth include a trapezoidal tooth that has a trapezoidal cross section that is taken vertically along a central axis of the yoke and an oddly shaped tooth of which a tip section has the same shape as the trapezoidal tooth and a base section from the tip section to the yoke has a different shape from the trapezoidal tooth.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: July 1, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha
    Inventors: Shinya Sano, Isao Kato
  • Publication number: 20140145547
    Abstract: Provided is a permanent magnet motor that realizes reduction of both cogging torque and torque ripple, and also downsizing and weight reduction together with torque ripple reduction. When two sets of three-phase armature windings are defined such that a first armature winding 30-1 corresponds to U1 phase, V1 phase, and W1 phase and a second armature winding 30-2 corresponds to U2 phase, V2 phase, and W2 phase, U1 phase is provided in both of any adjacent slots of a plurality of slots 27, or at least one of U1 phase and U2 phase is provided in one of any adjacent slots 27, U1 phase, V1 phase, and W1 phase are shifted by an electric angle of 20° to 40° from U2 phase, V2 phase, and W2 phase upon driving, and a slot opening width Ws of a stator iron core 22 is set to satisfy Ws/(2?Rs/Ns)?0.15, where Rs is an inner radius of the stator iron core and Ns is a slot number of the stator iron core.
    Type: Application
    Filed: October 14, 2011
    Publication date: May 29, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masatsugu Nakano, Satoru Akutsu, Yoshihito Asao, Yuji Takizawa, Yu Hirotani, Ryuichi Takiguchi
  • Patent number: 8729767
    Abstract: An electric machine (1), particularly used as an electric motor, has a rotor (2) comprising a plurality of disks (4). A disk (4) of the rotor (2) is divided in a circumferential direction (5) into a plurality of disk sectors (6, 7, 8) between which magnetic pockets (9, 10) are designed. Furthermore, the disk (4) has an inner fastening collar (15) and connecting members (20, 23, 24) connecting the disk sectors (6, 7, 8) to the fastening collar (15). Such a connecting member (20) comprises a main web (21), a side arm (30) branching off the main rib (21) in the circumferential direction (5), and a side arm (31) branching off the main web (21) opposite to the circumferential direction (5). High mechanical stability of the disk (4) can thus be ensured, wherein magnetic flow losses are reduced.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: May 20, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Lin Feuerrohr, Karl-Juergen Roth, Tilo Koenig, Bruno Holzwarth
  • Patent number: 8680740
    Abstract: A stator for an electrical machine, the stator including a plurality of stator teeth distributed in a non-uniform pattern with a short and long tooth spans along a circumference of the stator, wherein each stator slot between two stator teeth distanced by a long tooth span including an intermediate tooth for carrying a magnetic flux.
    Type: Grant
    Filed: August 27, 2011
    Date of Patent: March 25, 2014
    Assignee: ABB Research Ltd.
    Inventor: Robert Chin
  • Publication number: 20140055001
    Abstract: Provided is a stator of a motor which is capable of reducing a loss generated in a motor and thereby attaining a high-efficient motor, and a motor including the stator.
    Type: Application
    Filed: April 18, 2012
    Publication date: February 27, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Takashi Ogawa, Yuichi Yoshikawa, Ikuo Ozaki, Toshiyuki Tamamura, Hirokazu Yamauchi
  • Patent number: 8659205
    Abstract: A motor includes a stator and a rotor, equipped to be movable in at least a first direction relative to the stator, the rotor operably interfacing the stator so that a motor force is generated in a first direction, where the stator comprises an anti-cogging element configured to generate anti-cogging forces on the rotor in at least the first direction and a second direction at an angle to the first direction.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: February 25, 2014
    Assignee: Brooks Automation, Inc.
    Inventors: Jairo Moura, Jay Krishnasamy, Martin Hosek
  • Publication number: 20140028146
    Abstract: An induction motor includes: a stator and a rotor arranged so as to face the stator via a void, the rotor including conductor bars in a plurality of slots formed by a plurality of teeth arranged so as to extend in the circumferential direction of a rotatably held rotor core, wherein the circumferential width of distal end portions of the slots on the radially outside of the rotor core are narrowed by distal end portion of the teeth on the radially outside of the rotor core, and the teeth are each formed with a projection protruding in an arcuate shape from the distal end of the tooth on the radially outside of the rotor core toward the conductor bar in each of the slots.
    Type: Application
    Filed: June 13, 2013
    Publication date: January 30, 2014
    Inventors: Shinji SUGIMOTO, Akiyoshi KOMURA, Mamoru KIMURA, Seikichi MASUDA, Masatoshi KOIKE, Mikio ENDO
  • Publication number: 20130342070
    Abstract: Provided is a stator of a motor which is capable of reducing an iron loss generated in a motor and thereby attaining a high-efficient motor. A stator of a motor comprises a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a narrower portion having a smaller width than a remaining portion of the extending portion.
    Type: Application
    Filed: December 6, 2011
    Publication date: December 26, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Takashi Ogawa, Yuichi Yoshikawa, Ikuo Ozaki, Toshiyuki Tamamura, Hirokazu Yamauchi
  • Patent number: 8569924
    Abstract: A rotating electric machine includes a case, a plurality of teeth, coils and insulating films. The teeth are circumferentially arranged around a predetermined axis forming a center of the teeth. Each tooth has a first end disposed radially at an opposite side thereof from the predetermined axis. The a back yoke has a circular outer periphery, and a cylindrical inner periphery connecting the first ends of the teeth. The outer periphery has a plurality of concave parts opening radially inwardly toward the teeth at positions overlapping with the teeth as viewed radially. A minimum distance measured from an exposure surface of each tooth to the concave part overlapping therewith is smaller than a radial width of the back yoke at a portion where the concave parts are not provided. The exposure surfaces extend radially inwardly of the inner periphery.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: October 29, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Yoshiki Yasuda, Akio Yamagiwa
  • Patent number: 8466597
    Abstract: To provide an indication motor rotor capable of improving motor performance by concentrating portions under magnetic saturation conditions of rotor teeth. The rotor 1 of an induction motor of this invention may include slots 3 formed approximately in the shape of a T. The slots 3 may be formed so that top slots 3a are arranged on an outer peripheral portion of a rotor core 1a, and bottom slots 3b are arranged on an inner side of the top slots 3a. The width in the circumferential direction of the top slot 3a is wider than the width in the circumferential direction of the bottom slot 3b, and the width in the circumferential direction of a rotor tooth 4 between adjacent top slots 3a is narrower than the width in the circumferential direction of the rotor tooth 4 between adjacent bottom slots 3b.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: June 18, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yabe, Hayato Yoshino, Kazuhiko Baba, Tomoaki Oikawa, Takahiro Tsutsumi
  • Publication number: 20130127270
    Abstract: A method of inserting a continuous conductor having a rectangular cross-section into slot segments formed in a stator core includes deforming in a first direction a core member having a first end portion that extends to a second end portion to widen an opening at end portions of the slot segments, inserting one or more continuous conductors having a rectangular cross-section into select ones of the slot segments, and deforming in a second direction the core member to narrow the opening at end portions of the slot segments.
    Type: Application
    Filed: November 17, 2011
    Publication date: May 23, 2013
    Applicant: REMY TECHNOLOGIES, L.L.C.
    Inventor: Mark A. Stephenson
  • Patent number: 8441165
    Abstract: Disclosed are a motor for a compressor and a hermetic compressor having the same. An aluminum coil cheaper than a copper coil is used in the motor for the compressor, a ratio between the aluminum coil and a stator core is set, and sectional areas of main and sub slot portions of the stator core and the numbers thereof are adjusted to be suitable for usage conditions, whereby fabricating costs of the motor for the compressor and the hermetic compressor can drastically be reduced and efficiencies thereof can be improved.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: May 14, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hae-Ok Jung, Dong-In Park, Ki-Seok Sung, Jae-Hun Lee, Cheol Kim, Seong-Hun Seo
  • Publication number: 20130093283
    Abstract: Disclosed herein is a spindle motor. The spindle motor uses a general (non neodymium) permanent magnet rather than a neodymium magnet as a permanent magnet and compensates for a reduced counter electromotive force (B-EMF) value by allowing the center of a connection part formed in a round shape between poles around which coils are wound to be different from that of a core to increase a coil inductance value, thereby making it possible to easily sense and control a rotation state of the spindle motor.
    Type: Application
    Filed: October 11, 2012
    Publication date: April 18, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: SAMSUNG ELECTRO-MECHANICS CO., LTD.
  • Patent number: 8421294
    Abstract: A rotor includes permanent magnets arranged such that magnetic poles of N poles and S poles are arranged alternately in a rotation circumferential direction. The permanent magnets form a plurality of rows in a rotation axis direction. The rotor includes a change section in which arrangements of the magnetic poles change with respect to the rotation axis direction due to the permanent magnets being arranged such that arrangements of the magnetic poles change, in the rotation circumferential direction, between the permanent magnets in the plurality of rows. A stator includes tooth sections opposed to the rotor to surround the rotor, and auxiliary slots each of which is selectively formed at one portion of a front end portion of each tooth section in the rotation axis direction such that substantially a center of the auxiliary slot in the rotation axis direction is opposed to the change section.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: April 16, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinichi Yamaguchi, Hisashi Otsuka, Haruyuki Hasegawa
  • Patent number: 8415855
    Abstract: A brushless direct current (BLDC) motor has a 3-phase winding 20 and six stator teeth 14, 15 with alternate stator teeth 14 being wound and the remaining stator teeth 15 being left unwound. The winding 20 has three legs, one for each phase and each leg has one coil 22 wound about one of the stator teeth 14. Each leg has a first end A,B,C, arranged to receive electrical power and a second end X,Y,Z, which is connected to the second end of the other legs to form a star connection 24. Selected stator teeth have grooves in a face thereof dividing those teeth into a plurality of stator poles. The motor may be used to drive a fuel pump for an internal combustion engine, typically for a vehicle.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: April 9, 2013
    Assignee: Johnson Electric S.A.
    Inventors: Yong Bin Li, Wei Feng Yuan, Ning Sun, Xin Ping Wang
  • Patent number: 8390167
    Abstract: Disclosed are a motor for a compressor and a hermetic compressor having the same. An aluminum coil cheaper than a copper coil is used in the motor for the compressor, to thusly reduce a fabricating cost. Also, a ratio of a height of end coil of a coil to an inner diameter of a stator is appropriately designed or a ratio of an entire area of slot portions to the inner diameter of the stator is appropriately designed, and simultaneously a ratio of the inner diameter of the stator to a width of the tooth portion is appropriately designed, so as to previously prevent a deterioration of damping effect, increase in noise, lowering of efficiency, reduction of driven torque, all caused due to the use of the aluminum coil.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: March 5, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hae-Ok Jung, Seong-Hun Seo, Sang-Il Choi, Chul-Hyun Nam, Ki-Seok Sung
  • Patent number: 8350434
    Abstract: For providing a permanent magnet type rotary electric machine that can reduce magnetic fluxes concentrated to one side in rotating direction on a magnetic pole circumferential face that causes torque ripple as well as ensure the mechanical strength, in the present invention, an outer circumference of respective magnetic poles is formed in a circular arc having a same curvature as well as the magnetic pole center axes of the respective magnetic poles are displaced with respect to the rotation center of a rotor so that an air gap between a stator and the respective magnetic pole outer circumferences at one side in the rotating direction is widened in comparison with the air gap at the other side.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: January 8, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Hori, Daisuke Kori, Akiyoshi Komura
  • Patent number: 8344580
    Abstract: A stator (16) is proposed for a polyphase electric machine, having a core body (17), which is provided with slots (114), which are situated in the radial direction with respect to an axis of rotation of the electric machine on one side of the core body (17) parallel to the longitudinal axis of the core body (17), having a slot width (bn1, bn2) and a stator yoke (122) being provided on the opposite side, with two slots (114) each being separated from one another by a tooth (116) having a tooth width (bz1, bz2) and extending from a slot base (120) to a tooth head (118), these slots (114) being provided to receive at least one coil winding having a plurality of coils that is electrically connected in series and are manufactured from at least one continuous wire (124) without interruption, the ratio (bz2/hj) of the tooth width (bz2) to the yoke height (hj) at the tooth head (118) being between 0.3 and 0.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: January 1, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Eberhard Rau, Alexander Shendi
  • Patent number: 8344581
    Abstract: To provide an indication motor rotor capable of improving motor performance by concentrating portions under magnetic saturation conditions of rotor teeth. The rotor of an induction motor of this invention may include slots formed approximately in the shape of a T. The slots may be formed so that top slots are arranged on an outer peripheral portion of a rotor core, and bottom slots are arranged on an inner side of the top slots. The width in the circumferential direction of the top slot is wider than the width in the circumferential direction of the bottom slot, and the width in the circumferential direction of a rotor tooth between adjacent top slots is narrower than the width in the circumferential direction of the rotor tooth between adjacent bottom slots.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: January 1, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yabe, Hayato Yoshino, Kazuhiko Baba, Tomoaki Oikawa, Takahiro Tsutsumi
  • Publication number: 20120326552
    Abstract: An armature core of a stator has an annular portion and a plurality of teeth extending radially from the annular portion. A segment coil is configured by electrically connecting a plurality of segment conductors together. The segment conductors extend axially through slots S, each of which is defined between each adjacent pair of the teeth. Each of the teeth has a width adjustment portion for decreasing a slot width in a direction perpendicular to a radial direction in the radially inward direction.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 27, 2012
    Applicant: ASMO CO., LTD.
    Inventors: Yoshimasa KINPARA, Noriyasu NISHIO, Takahiro YAMAMOTO
  • Patent number: 8288912
    Abstract: An electromagnetically excitable coil having a wire, the wire being wound around a wire holder in one winding direction, the wire having a winding start, which generally is disposed at a first end of the coil, and a winding end, which generally is disposed at the same end of the coil, using an uneven number of winding layers, the coil having an elongated cross-section and the cross-section having a longer side and a shorter side, the wire being routed from the second end of the coil to the first end of the coil while forming at least one wire crossing at the shorter side of the cross-section.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: October 16, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Michael Kljaic, Harald Bodendorfer
  • Patent number: 8258669
    Abstract: A motor including a stator and rotor. The stator includes a stator core, slot portions and coils. The stator core includes stator core pieces with teeth portion having a distal end portion and two side portions, a yoke portion, and a claw portion formed at one of the two side portions. At the distal end portion, the stator core pieces are connected so that claw portions protrude in the same circumferential direction to form the stator core into a cylindrical shape. The slot portions are formed between adjacent teeth portions and between the stator core pieces. The coils form three phases which are inserted into the slot portions, are bridged between two of the slot portions and include end portions that protrude from an edge face of the stator core in an axial direction. The coils are arranged so that the end portions are intersected with each other.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: September 4, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventor: Satoshi Shikata
  • Patent number: 8253298
    Abstract: A stator includes an elongate core defining an inner volume to receive a rotor of an electric machine. The core includes a yoke and an array of teeth extending from the yoke toward the inner volume. The array of teeth defines slots between each pair of adjacent teeth in the array. Each slot includes a first slot region adapted to hold at least a portion of a conductive winding and a second slot region adapted to hold at least a portion of a conductive winding. The first slot region is defined by two non-parallel opposing slot side portions, and the second slot region is defined by two parallel opposing slot side portions.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: August 28, 2012
    Assignee: Direct Drive Systems, Inc.
    Inventors: Daniel M. Saban, John Stout, Paulo Guedes-Pinto
  • Patent number: 8222790
    Abstract: There are provided a tubular stator core having a plurality of tooth portions which protrude radially inwards and slots which are defined between the respective tooth portions and coils which are disposed on circumferences of the tooth portions. An insulator is attached to the stator core from an axial direction thereof for isolating the coils from the stator core. A radius of curvature of a corner portion of the insulator around which the coil is wound decreases continuously as the tooth portion extends from a root portion to a distal portion thereof.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: July 17, 2012
    Assignee: JTEKT Corporation
    Inventor: Takatoshi Sakata
  • Patent number: 8207646
    Abstract: To provide an indication motor rotor capable of improving motor performance by concentrating portions under magnetic saturation conditions of rotor teeth. The rotor 1 of an induction motor of this invention may include slots 3 formed approximately in the shape of a T. The slots 3 may be formed so that top slots 3a are arranged on an outer peripheral portion of a rotor core 1a, and bottom slots 3b are arranged on an inner side of the top slots 3a. The width in the circumferential direction of the top slot 3a is wider than the width in the circumferential direction of the bottom slot 3b, and the width in the circumferential direction of a rotor tooth 4 between adjacent top slots 3a is narrower than the width in the circumferential direction of the rotor tooth 4 between adjacent bottom slots 3b.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: June 26, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yabe, Hayato Yoshino, Kazuhiko Baba, Tomoaki Oikawa, Takahiro Tsutsumi
  • Patent number: 8207648
    Abstract: A dual-rotor motor in which inner slot angle ?i is larger than outer slot angle ?o. An inner notched portion is provided on both circumferential ends of an inner head. This inner notched portion provides a broader space between the inner head and an inner rotor toward both utmost ends of the inner head. An outer notched portion is provided on both circumferential ends of an outer head. This outer notched portion provides a broader space between the outer head and the outer rotor toward both utmost ends of the outer head.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: June 26, 2012
    Assignee: Panasonic Corporation
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami
  • Publication number: 20120112597
    Abstract: Stator designs have wide-mouth slots between adjacent poles. Wire coils with high slot fill conductivity are formed around the poles. In some designs, the wire coils are wave wound around the poles. Thick bar conductors can be used for making the wire coils. The wire coils may be inserted using nozzle dispensers or transferred from a pre-form mandrel. In other designs, the wire coils are pre-formed on transferable pockets that are then mounted on the poles. Optional pole extensions or shoes can be attached to the stator poles after the wire coils are formed around the poles.
    Type: Application
    Filed: June 7, 2011
    Publication date: May 10, 2012
    Applicant: ATOP S.p.A.
    Inventors: Raffaele Becherucci, Massimo Pelletta, Rodolfo Pes, Gianfranco Stratico
  • Patent number: 8154167
    Abstract: A high efficiency, high torque density, high speed induction motor is provided, the motor utilizing (i) stator teeth with parallel side surfaces; (ii) rotor teeth with parallel side surfaces; (iii) wide open stator slots; (iv) closed rotor slots with thick tooth bridges; and (v) deep stator and rotor slots.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: April 10, 2012
    Assignee: Tesla Motors, Inc.
    Inventor: Yifan Tang
  • Patent number: 8129880
    Abstract: Methods and apparatus are provided for improving operational characteristics of a concentrated winding machine. According to an example embodiment, an apparatus comprises stator teeth having distal ends, the stator teeth arranged in an annular fashion about an axis to define stator slots between adjacent teeth and slot openings between the distal ends of the adjacent teeth, the stator teeth structured to prevent relative movement between adjacent teeth. The apparatus further comprises magnetic wedges structured to be inserted between the distal ends of the adjacent teeth to close the slot openings.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: March 6, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Khwaja M. Rahman, Edward L. Kaiser, Matthew D. Laba
  • Patent number: 8125114
    Abstract: A locking wedge for a slot of a dynamoelectric machine is provided. The locking wedge includes a main body extending in an axial direction. The main body has a top surface and a bottom surface with a greater surface area than the top surface, and a first end surface and a second end surface opposed to the first end surface. First and second locking slots extend in the axial direction into a portion of the main body. The first locking slot begins in the first end surface and the second locking slot begins in the second end surface. A first locking member is disposed to fit into the first locking slot, and a second locking member is disposed to fit into the second locking slot. The first and second locking members can be inserted into the first and second locking slots, respectively, to lock the locking wedge in the slot.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: February 28, 2012
    Assignee: General Electric Company
    Inventors: Brock M. Lape, Benjamin A. Mancuso, Michael C. Villani