Mounting (such As On A Surface Of A Shaft) Patents (Class 310/156.08)
  • Patent number: 10848023
    Abstract: Provided is a motor including a permanent magnet, in which the permanent magnet includes a high temperature side permanent magnet part exposed to a high temperature inside the motor, and a low temperature side permanent magnet part exposed to a temperature lower than the high temperature inside the motor, and a coercive force of the high temperature side permanent magnet part is higher than the coercive force of the low temperature side permanent magnet part.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: November 24, 2020
    Assignee: TDK CORPORATION
    Inventors: Hidetake Kitaoka, Makoto Iwasaki, Tetsuya Hidaka, Eiji Kato, Takuma Hayakawa
  • Patent number: 10840756
    Abstract: A front iron core includes a first iron core main body and a plurality of first projecting sections which project to a radial outer side from the first iron core main body. A second iron core includes a second iron core main body which overlaps with the first iron core main body and a plurality of second projecting sections which project to a radial outer side from the second iron core main body. When a rotor iron core is viewed along the axis line, portions of the second projecting sections protrude as extension sections to outward in the circumferential direction, from the first projecting sections. Furthermore, when the rotor iron core is viewed along the axis line, radial-direction outer side end surfaces of the extension parts are smoothly continuous with radial-direction outer side end surfaces of the first projecting sections.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: November 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takizawa, Satoru Akutsu, Shusuke Hori
  • Patent number: 10767691
    Abstract: A magnetic bearing (20) comprises: a rotor (22) to be supported for rotation about an axis (502); a stator (24) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (110); one or more second permanent magnets (112) of polarity substantially opposite to a polarity of the one or more first permanent magnets; at least three radial windings (40,42,44,46); a first axial winding (34); a second axial winding (36); a first end pole (120); and a second end pole (122).
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: September 8, 2020
    Assignee: Carrier Corporation
    Inventors: Jagadeesh K. Tangudu, Parag M. Kshirsagar
  • Patent number: 10734874
    Abstract: A rotor supports embedded cylindroid permanent magnets, extending parallel to the rotor axis, and transversely magnetized with a respective magnetization direction radial to the rotor axis. The rotor is concentric to an inner stator and an outer stator. The embedded cylindroid permanent magnets include an arcuate surface facing the outer stator teeth concurrent with an arcuate surface facing the inner stator teeth.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: August 4, 2020
    Inventors: Shahin Asgari, Seyed Mojtaba Aghamirsalim
  • Patent number: 10683893
    Abstract: A magnetic bearing device comprises a radial magnetic bearing configured to magnetically levitate and support a rotor shaft in a radial direction; an axial magnetic bearing configured to magnetically levitate and support, in an axial direction, a rotor disc rotatable together with the rotor shaft; and an axial displacement sensor disposed on a surface of an electromagnet core of the axial magnetic bearing facing the rotor disc and configured to detect axial displacement of the rotor disc.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: June 16, 2020
    Assignee: Shimadzu Corporation
    Inventor: Junichiro Kozaki
  • Patent number: 10666099
    Abstract: Presented are slotted permanent magnets (PM) for electric machines, motor generator units using slotted PMs, methods for making/using slotted PMs, and motor vehicles equipped with an electric traction motor using slotted PMs. An electric machine includes an annular stator with a hollow core and one or more internal stator slots. One or more electrically conductive windings is/are disposed in the stator slot(s). A cylindrical rotor is rotatably disposed inside the hollow core of the stator. One or more permanent magnets is/are mounted to the rotor. Each permanent magnet includes a rigid, single-piece PM body with opposing first and second faces. A first set of elongated grooves is recessed into the first face. An optional second set of elongated grooves is recessed into the second face. Each of the grooves has a depth that is substantially parallel to a direction of a magnetic field generated by the permanent magnet.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: May 26, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Alireza Fatemi, Thomas W. Nehl, David J. Brooks
  • Patent number: 10630124
    Abstract: The invention discloses an electric motor and a tangential type permanent magnet rotor. The tangential type permanent magnet rotor includes a rotor iron core (2) and permanent magnets (1) provided on the rotor iron core (2); a width of one side, close to the outer edge of the rotor iron core (2), of each of the permanent magnets (1) is H2; and a width of one side, close to the center of the rotor iron core (2), of each of the permanent magnets (1) is H1, wherein H2>H1. The tangential type permanent magnet rotor enables the width H2 of a permanent magnet part close to the outer edge of the rotor iron core to be larger, and enables the width H1 of a permanent magnet part close to the center of the rotor iron core to be smaller.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 21, 2020
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Yong Xiao, Yusheng Hu, Bin Chen
  • Patent number: 10508948
    Abstract: A turbine engine assembly includes a housing and a bladed wheel rotatable within the housing. The bladed wheel includes a blade including a head opposite the housing. The head includes a magnet and the housing includes first and second electrical conductors. Each electrical conductor generates, across terminals thereof, an electrical voltage induced by the magnet of the head opposite the housing and that represents vibrations of the head of the blade when the bladed wheel is rotated. The first electrical conductor includes a first central portion extending around the rotational axis of the bladed wheel and includes two mutually facing ends, and the second electrical conductor includes a second central portion passing through a space left by the first central portion between the two ends thereof. The arrangement of the electrical conductors makes it possible to obtain two voltages for determining an axial vibration speed at the tip.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: December 17, 2019
    Assignee: SAFRAN HELICOPTER ENGINES
    Inventors: Arnaud Talon, Jean-Yves Cazaux, Guillaume Chauvin, Julien Garnier
  • Patent number: 10473386
    Abstract: A household cooling appliance includes a dispenser unit for dispensing a liquid and/or free flow refrigerated goods. The dispenser unit includes an insert having side walls bounding a niche into which a receptacle can be inserted for receiving the liquid and/or the free flow refrigerated goods to be dispensed. At least the side walls are partly covered at the front side by a cover which is separate from the insert. At least one side wall includes an engagement recess for engagement with a tool and for lifting the cover from the insert with the tool and/or at least one side wall is partly covered on the front side by a plate-shaped cover that is separate from the insert and the cover is held on the side wall by at least one magnet.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: November 12, 2019
    Assignee: BSH Hausgeraete GmbH
    Inventors: Volkan Cakirca, Mehmet Ciyanoglu, Lars Dinter, Tanzer Yildizgoecer
  • Patent number: 10320248
    Abstract: A rotor with permanent magnets for a rotary electric machine including a plurality of alternating north poles and south poles and made up of a plurality of permanent magnets arranged in first recesses extending axially and distributed regularly between a circumferential portion and a central portion of the magnetic mass of the rotor such as to define a plurality of circumferential polar sections, the first recesses being separated by central tabs with a thickness E, the permanent magnets having a polygonal radial section that comprises a substantially rectangular portion next to the circumferential portion adjacent to a substantially trapezoidal portion next to the central portion. The rotor having a ratio R0 (h/E) of a first height h of the trapezoidal portion to the thickness E of a central tab is predetermined such as to maximize the efficiency of the electric machine.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: June 11, 2019
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Lilya Bouarroudj, Virginie Leroy, Nam-Gook Kim
  • Patent number: 10291092
    Abstract: The present invention relates to a motor for a vehicle and a rotor applied thereto, wherein the rotor includes a first rotor core having a plurality of magnet contact surfaces in a first direction that is a longitudinal direction, second rotor cores positioned to face the plurality of magnet contact surfaces, a plurality of magnets positioned between the first rotor core and the second rotor cores, and a partition unit disposed between the magnets adjacent to each other and configured to fix the second rotor cores and the magnets.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: May 14, 2019
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Yong Chul Kim
  • Patent number: 10122230
    Abstract: A permanent-field armature for an electrical machine includes an armature body having internal magnet pockets, and a plurality of permanent magnets having a magnetization for generating a magnetic field and disposed in the magnetic pockets in one-to-one correspondence. The armature body guides the magnetic field between the magnet pockets and magnetic poles of the armature on an armature surface. Each magnet pocket is formed for guiding the magnetic field in a material which has at least one area having a magnetic anisotropy with an easy axis and a hard axis of magnetizing capability, with the easy axis being aligned in parallel relation to or at least at an angle of less than 25° to a magnetization direction of the magnetization of the permanent magnet disposed in the magnet pocket.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: November 6, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ralf Fischer, Rolf Vollmer
  • Patent number: 10056795
    Abstract: Provided is an interior permanent magnet motor including: a stator; and a rotor, the rotor including separated permanent magnets for one magnetic pole, in which: a rotor core includes the same number of separated magnet insertion holes as that of the plurality of permanent magnets for one magnetic pole; bridges are formed between respective adjacent ones of the magnet insertion holes in each magnetic pole; each of the bridges includes a pair of parallel linear portions and two pairs of curved portions; under a state in which the permanent magnets are inserted into the magnet insertion holes, the pair of linear portions are in contact with edge surfaces of the permanent magnets; the pair of curved portions are connected to ends of the linear portions; and an interval between the pair of curved portions becomes larger as the interval becomes away from the linear portions.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: August 21, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naohiro Oketani, Kazuhiko Baba
  • Patent number: 9909444
    Abstract: A turbomachine fitted with a device for gathering the information recorded during operation of the former by a strain gauge positioned on a fan blade borne by a fan disc of the turbomachine, the device including a hollow cylindrical pipe positioned inside one of the rotating shafts of the turbomachine in order to guide at least one wire for transmitting this information, wherein the device further includes a part for attaching the pipe to the rotating shaft.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: March 6, 2018
    Assignee: SNECMA
    Inventors: Stephane Rousselin, Jean-Francois Adnot, Patrick Marcellin
  • Patent number: 9812912
    Abstract: A rotor for a permanent magnet motor, includes a magnetic pole portion that includes a magnetic body formed in an annular shape; and a field portion that is disposed adjacent to the magnetic pole portion in an axial direction, that includes a permanent magnet formed in an annular shape and having a multipole structure or a plurality of permanent magnets formed in an annular shape and having a monopole structure and a magnetic body, and that causes a magnetic flux generated by the permanent magnet to flow in the axial direction so as to generate magnetic poles on an outer circumferential surface of the magnetic pole portion.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: November 7, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Kobayashi, Kentaro Horisaka, Kenta Ozaki, Koki Naka, Hisashi Otsuka
  • Patent number: 9787150
    Abstract: A rotor of a brushless motor used in a fuel pump includes a permanent magnet having first and second ends that are configured to have a thickness ratio so that a degree of margin of those ends, which is a difference between an allowable stress and a temperature stress due to expansion and contraction of a rotor core caused by a temperature change is equal to or greater than a preset value. As a result, a cracking of the permanent magnet on the both ends that is caused by repeated expansions and contractions of the rotor core is prevented.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: October 10, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yuuji Hidaka, Kiyoshi Nagata
  • Patent number: 9667111
    Abstract: Exemplary embodiments disclose a rotor of an electric motor and an electric motor using the same. The rotor includes a core which includes a plurality of protrusion portions which are arranged along an outer circumference of the core and protrude radially to an outer portion of the core, and a plurality of concave portions interposed between the protrusion portions; a plurality of permanent magnets which are respectively disposed at the plurality of concave portions; and a plurality of pole pieces which are disposed at the plurality of concave portions and at outer sides of the plurality of permanent magnets. A length of each of the plurality of pole pieces in an axial direction is shorter than a length of each of the plurality of protrusion portions in the axial direction.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: May 30, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., Kyungpook National University Industry-Academic Cooperation Foundation
    Inventors: Won-ho Kim, Seong-taek Lim, Hong-soon Choi, Jin-woo Cho
  • Patent number: 9667105
    Abstract: A motor rotor includes a cylindrical housing, a positioning ring and a plurality of magnets. The cylindrical housing includes a plurality of securing holes. The positioning ring is disposed on the cylindrical housing. The positioning ring is disposed with a plurality of flexible ribs and a plurality of securing ribs disposed corresponding thereto. Each of the flexible ribs is radially pressable. The flexible ribs are disposed in the cylindrical housing, and each of the securing ribs is inserted in a respective corresponding one of the securing holes. The magnets are disposed in the cylindrical housing. Each of the magnets is clamped between the adjacent flexible ribs and is arranged annularly along an inner wall of the cylindrical housing, so as to facilitate assembly.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: May 30, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chao-Hsing Kang, Chien-Ho Lee, Tsung-Yin Lee
  • Patent number: 9469302
    Abstract: A torque control apparatus includes: a flux linkage estimator estimating a variation of flux linkage based on a difference between a current temperature of a motor measured by a temperature sensor and a predefined reference temperature; a torque compensation value calculator calculating a torque compensation value corresponding to the current temperature of the motor based on the estimated variation of flux linkage; and a torque compensator compensating for an error of required torque of a torque command by applying the calculated torque compensation value in response to a change in temperature of the motor and outputting a final torque command including the error-compensated required torque to a current map of a motor controller.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: October 18, 2016
    Assignee: Hyundai Motor Company
    Inventors: Han Hee Park, Gu Bae Kang, Tae Il Yoo
  • Patent number: 9318924
    Abstract: In a rotor mechanism of a rotating electrical machine, a crimp groove is formed, in a circumferential direction, in an outer circumferential portion of any one of the end plates of a rotor shaft on an outside in the axial direction. The one end plate is located in the axial direction by an inside end of a crimp retainer in the axial direction that is ring-shaped, that covers the crimp groove of the rotor shaft to fit to the rotor shaft, that is fitted into the crimp groove of the rotor shaft by crimping an outside portion in the axial direction from an outer circumferential side and that engages with a wall surface of the crimp groove on the outside in the axial direction.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: April 19, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Naoto Taguchi, Tsukasa Morita, Hiroshi Miyaoka
  • Patent number: 9143014
    Abstract: A cover is configured into a tubular form and is fitted to a radially outer surface of each of projections of a rotor core and a radially outer surface of each of permanent magnets. A circumferential center portion of the radially outer surface of each projection contacts a radially inner surface of the cover. Circumferential end portions of the radially outer surface of each projection are radially inwardly spaced from the radially inner surface of the cover.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: September 22, 2015
    Assignees: DENSO CORPORATION, ASMO CO., LTD.
    Inventors: Makoto Taniguchi, Jirou Hayashi, Masahiro Goto
  • Publication number: 20150145367
    Abstract: A rotor for a brushless motor includes a shaft, a rotor core and a number of permanent magnets. The rotor core includes inner and outer annular portions. The inner annular portion has a central hole for receiving the shaft. The outer annular portion includes a number of sector segments arranged in a ring, with adjacent sector segments defining a slot there between for receiving a corresponding permanent magnet. Radially outer ends of adjacent sector segments are interconnected by a connector. The sector segments include first sector segments and second sector segments arranged alternately. The first sector segments are separated from the inner annular portion. The second sector segments are each connected to the inner annular portion by connecting arms.
    Type: Application
    Filed: November 28, 2014
    Publication date: May 28, 2015
    Inventors: Yue LI, Chui You ZHOU, Jie CHAI, Kwong Yip POON, San Yuan XIAO, Han HE
  • Publication number: 20150145366
    Abstract: A rotor which can raise the axial direction strength near the end edges outside of the rotor core in the radial direction. The rotor comprises a shaft, a rotor core which has a plurality of magnetic steel sheets and is fastened to the shaft, and a plurality of magnets which are arranged inside of the rotor core. The rotor core has a center hole which holds the shaft, a plurality of magnet holes which are arranged at the outside of the center hole in the radial direction and hold magnets, resin holes which are arranged at the outsides of the magnet holes in the radial direction and which run through the rotor core in the axial direction, and rotor core fastening members which include first resin parts which are filled inside the resin holes.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 28, 2015
    Inventors: Koudai Akashi, Hidetoshi Uematsu, Makoto Funakubo
  • Patent number: 9024495
    Abstract: A rotor for an electric motor that includes a main body on which a support surface is formed, to which a permanent magnet element is attached. The main body is partially surrounded by a joining sleeve having chamber walls. The chamber walls together with the support surfaces form a chamber in which the permanent magnet element is arranged. The joining sleeve fixes the position of the permanent magnet element in a radial direction on the main body and a locking element is molded onto the main body. The locking element closes the chamber fixing the position of the permanent magnet element in the axial direction on the main body.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: May 5, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Rüdiger Brandau, Kurt Siebald
  • Patent number: 9024496
    Abstract: At least part of each bridge portion is heated and molten to form a keyhole, and a nonmagnetic element is disposed around the keyhole. Thus, even when the width of the bridge portion in the radial direction is increased, the bridge portion is demagnetized. Therefore, leakage flux in the bridge portion is reduced, and the output power of a motor is increased. Moreover, by increasing the width of the bridge portion in the radial direction, the strength of the bridge portion is increased, and breakage of the bridge portion due to a centrifugal force at high-speed rotation of a rotor is prevented.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: May 5, 2015
    Assignee: JTEKT Corporation
    Inventors: Takaya Nagahama, Masami Naka, Kouji Kitahata, Yoshiyuki Shibata, Shigeki Nagase, Takashi Kageyama
  • Publication number: 20150115759
    Abstract: A rotor arm for an electrical machine includes a support pot for mounting a magnetic element. The support pot has a hub bearing a drive shaft. An inner peripheral surface of the rotor arm has, in an axial direction from the hub, an end stop for a supporting element of the rotor arm for the further bearing of the drive shaft.
    Type: Application
    Filed: January 29, 2013
    Publication date: April 30, 2015
    Applicant: Daimler AG
    Inventors: Martin Doeringer, Manfred Kempf, Hans-Guenther Merheim
  • Publication number: 20150108866
    Abstract: A rotor assembly for an electric machine includes a plurality of lamination sheets. Each of the lamination sheets defines an aperture. The lamination sheets are disposed adjacent each other to define a laminated stack. The apertures are aligned with each other to define a slot extending parallel with a central axis of the laminated stack. A magnet is disposed within the slot. The lamination sheets include a group of recess lamination sheets and a tab lamination sheet. The tab lamination sheet includes a tab that extends into the slot, and into abutting engagement with the magnet to bias the magnet against a wall of the slot. The apertures of the group of recess lamination sheets include a groove portion that defines a groove. The tab of the tab lamination sheet is at least partially disposed within the groove defined by the recess lamination sheets.
    Type: Application
    Filed: October 23, 2013
    Publication date: April 23, 2015
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Edward L. Kaiser, Paul Buchholz
  • Publication number: 20150102694
    Abstract: A rotor for preventing breakaway includes a shaft, a rotor core configured to be coupled to the shaft, and multiple permanent magnets configured to be inserted into the rotor core, wherein a cylindrical metallic ring is inserted and fixed on an outer surface of the rotor core.
    Type: Application
    Filed: September 4, 2014
    Publication date: April 16, 2015
    Inventor: Jaehong Song
  • Publication number: 20150069863
    Abstract: A motor rotor assembly that includes multiple motor rotor sections and a rotor bar that extends through the motor rotor sections, such that the rotor bar and the motor rotor sections are configured such that the rotor sections are step-skewed, or continuously skewed, from each other. The assembly may be used in an IPM or Synchronous Reluctance motor; and, the motor rotor sections may be of solid core or laminations. Various assembly components, IPM and Synchronous Reluctance motors, and methods of construction/assembly are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 12, 2015
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Francesco Papini, Alexander Felix Fiseni, Mohamed Osama
  • Publication number: 20150061443
    Abstract: A rotor has a projection part projected from an inner wall of a central hole part toward a central axis and a rib part defined between opening parts adjacent with each other in a circumferential direction. A first imaginary straight line is defined to extend from the central axis outward in a radial direction through a center of the projection part. The projection part is formed so that the first imaginary straight line passes the opening part. A second imaginary straight line is defined to extend from the central axis outward in the radial direction through a center of the rib part. The rib part is formed so that the second imaginary straight line passes a center of a pole part or an intermediate position between pole parts adjacent with each other in the circumferential direction.
    Type: Application
    Filed: August 4, 2014
    Publication date: March 5, 2015
    Inventors: Asuka TANAKA, Tatsuya INAGAKI
  • Publication number: 20150061441
    Abstract: An electric machine includes a machine housing and a stator disposed at least partially within the housing. The electric machine also includes a radially embedded permanent magnet rotor disposed at least partially within the housing and an endcap. The rotor has at least one radially embedded permanent magnet that is configured to provide increased flux to reduce motor efficiency loss. The endcap is operably connected to a distal portion of the rotor.
    Type: Application
    Filed: August 21, 2014
    Publication date: March 5, 2015
    Inventors: Daniel Shawn Figgins, Harold Clifton Kingrey, Michael Allen Marks, Jeffrey Alan Hall, Subhash Marutirao Brahmavar, Alan Jacob Manz, David Allen Clendenen, Rafal Pawel Rohoza
  • Publication number: 20150048706
    Abstract: A synchronous electric motor having a structure for reducing cogging torque generated by the positioning error of a permanent magnet. Protrusions are alternately arranged in regions A and B in the circumferential direction of an iron core. Therefore, with respect to neighboring magnets positioned on both sides of the first protrusion, in region B, where the protrusion does not exit, ends of the neighboring magnets are attracted to each other by magnetic force. On the other hand, with respect to the neighboring magnets positioned on both sides of the second protrusion, in region A, where the protrusion does not exit, ends of the neighboring magnets are attracted to each other by magnetic force resulting in being inclined in opposing directions, and thus the generated cogging torque is significantly reduced.
    Type: Application
    Filed: August 14, 2014
    Publication date: February 19, 2015
    Inventor: Youichi Akasako
  • Patent number: 8937417
    Abstract: This rotating electric machine includes a rotor including a rotating shaft portion, a rotor yoke surrounding the rotating shaft portion and a rotor core, arranged on the outer peripheral surface of the rotor yoke, having a plurality of permanent magnets circumferentially arranged thereon at intervals, and a stator arranged to be opposed to the outer peripheral surface of the rotor, while the rotor yoke and the inner peripheral portion of the rotor core are fixed to each other with a fixing member.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: January 20, 2015
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yasuhiro Miyamoto, Hiroshi Tsumagari, Daisuke Morishita
  • Patent number: 8933604
    Abstract: A rotor core assembly that includes a magnet, a first end cap located at an end of the magnet, a second end cap located at an opposite end of the magnet, and a sleeve that surrounds the magnet and the end caps. The sleeve forms an interference fit with each of the end caps, and an adhesive is located between the magnet and the sleeve. Additionally, a method of manufacturing the rotor core assembly.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: January 13, 2015
    Assignee: Dyson Technology Limited
    Inventors: David Ions, Paul Theo Heyting, Matthew John Childe, David Michael Jones
  • Patent number: 8922083
    Abstract: A laminated core of a rotor includes an inner core portion and a plurality of outer core portions. The inner core portion axially extends in a cylindrical shape in a region located more radially inward than magnets. The outer core portions are arranged in a circumferential direction in a region located more radially outward than the inner core portion. The plurality of outer core portions and a plurality of the magnets are alternately arranged in the circumferential direction. Accordingly, magnetic flux generated from a pair of magnetic pole surfaces of the plurality of magnets can be effectively used. In addition, the laminated core includes caulking portions in each of the inner core portion and the plurality of outer core portions. Accordingly, a plurality of thin plate cores are firmly fixed.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: December 30, 2014
    Assignee: Nidec Corporation
    Inventors: Kyohei Asahi, Kenichiro Hamagishi, Kuniaki Tanaka, Susumu Terada
  • Patent number: 8901794
    Abstract: A rotor for an electric machine includes a base body and a plurality of support bodies that are fixed on the base body and support permanent magnets. The rotor is characterized in that two first support bodies that are located at a distance from one another form a receiving region for a second support body, allowing the first support body to be positively connected to the second support body.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: December 2, 2014
    Assignee: Aerodyn Engineering, GmbH
    Inventor: Sonke Siegfriedsen
  • Patent number: 8896175
    Abstract: A rotor for an electric machine excited by magnetic poles formed by one or more embedded permanent magnets includes a magnetic body and the one or more embedded permanent magnets associated with the magnetic body defining first magnetic poles and second magnetic poles of alternating magnetic polarity along a rotor direction. For at least one of the one or more embedded permanent magnets a rotor segment is arranged between the one or more embedded permanent magnets and a first surface of the magnetic body. At least one retainer element connects the rotor segment to a portion of the magnetic body.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: November 25, 2014
    Assignee: Volvo Technology Corporation
    Inventors: Maddalena Cirani, Sture Eriksson
  • Patent number: 8860271
    Abstract: A rotating electric machine includes a stator and a rotor. The rotor includes an iron core and permanent magnets. The iron core includes a cylindrical connection portion and ten magnetic pole portions. The cylindrical connection portion surrounds a rotation shaft. The ten magnetic pole portions, the number of which corresponding to the number of poles, are disposed radially outside the connection portion. The connection portion and the magnetic pole portions are integrated with each other. The permanent magnets are disposed between the magnetic pole portions. The magnetic pole portions include flange portions that cover parts of radially outer surfaces of the permanent magnets while allowing at least parts of the radially outer surfaces to be exposed. Each of the permanent magnets includes a tapered portion in at least a part thereof, and the tapered portion has a length in a direction perpendicular to the radial direction that decreases radially inward.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: October 14, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Mitsuru Iwakiri, Masanobu Kakihara, Kenji Watanabe, Kenichi Aoki
  • Publication number: 20140252902
    Abstract: An electrical machine includes at least one magnet that provides a dipole magnetic field having a primary direction. A plurality of elongate conductive members is spaced from one another in a plane perpendicular to this primary direction. The members extend radially away from a central axis parallel to this primary direction. The magnet(s) or the plurality of members is coupled to a shaft that rotates about the central axis whereby the members interact with the magnetic field during such rotation. At least one electrical circuit provides for electric current flow through the members during such rotation. In a generator mode, the shaft is driven by an external source, and the electrical circuit produces current flow during shaft rotation. In a motor mode, an external source supplies current flow through the circuit, which causes interaction between the members and the magnetic field produced by the magnet to rotate the shaft.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 11, 2014
    Inventor: Kazimierz M. Binkowski
  • Patent number: 8829753
    Abstract: A motor includes: a rotor comprising: a rotary shaft; a magnetic body rotatable together with the rotary shaft; and first and second permanent magnets fixed on an outer circumference or an inner circumference of the magnetic body, and a stator comprising: an iron core arranged around the rotor; and a coil for exciting the iron core.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: September 9, 2014
    Assignee: Shinano Kenshi Co., Ltd.
    Inventor: Nobuchika Maruyama
  • Patent number: 8800132
    Abstract: A magnet loading apparatus for loading magnet pole pieces onto a field of an electric machine is described. The apparatus includes positioning means realized to hold a magnet pole piece of a plurality P of magnet pole pieces in place relative to its designated position on the field; and a transfer means realized to simultaneously transfer a plurality P of magnet pole pieces from the positioning means onto the field of the electric machine. Also described is a method of loading magnet pole pieces onto a field of an electric machine.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: August 12, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Torben Peter Andersen, Alan Hansen, Stefan Maroti, Klaus Thaarup
  • Publication number: 20140191607
    Abstract: Disclosed is a motor rotor, comprising an iron core (10) and permanent magnets (20) provided inside the iron core (10). The iron core (10) is provided with sets of mounting grooves (30) on the iron core (10) in the peripheral direction of the iron core, each set of mounting grooves (30) comprising two or more mounting grooves (30) provided intermittently in the radial direction of the iron core (10). There are sets of permanent magnets (20), the individual permanent magnets (20) of each set of permanent magnets (20) correspondingly being embedded into the individual mounting grooves (30) of each set of mounting grooves; there is an island region (12) between the outermost layer of mounting grooves (30) and the periphery of the iron core (10), and an enhancing hole (13) is provided in the island region (12), an enhancing rod (60) being provided in the enhancing hole (13).
    Type: Application
    Filed: August 29, 2011
    Publication date: July 10, 2014
    Applicants: Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai, Gree Electric Appliances, Inc. of Zhuhai
    Inventors: Hui Huang, Yusheng Hu, Dongsuo Chen, Huajie Chen, Yong Xiao, Xueying Zeng, Wenming Zhang
  • Publication number: 20140175929
    Abstract: A rotor structure for a motor includes a shaft, a single magnet and two fixing seats. The single magnet has two opposite end faces. An axial hole has a maximum extent equal to a maximum extent between the two opposite end faces. At least one of the two opposite end faces has a first engaging member. The magnet and each opposite end face have a maximum radial extent. Each fixing seat includes an abutting face having a maximum radial extent the same as the maximum radial extent of the single magnet and of the opposite end faces. One of the abutting faces has a second engaging member. The first engaging member is located at the maximum radial extent at the outer edge of the at least one of the two opposite end faces, or located at the inner edge of the at least one of the two opposite end faces.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD
    Inventors: Alex Horng, Tso-Kuo Yin
  • Publication number: 20140152136
    Abstract: In some embodiments, an electromagnetic machine includes a rotor element configured for movement relative to a stator. The rotor element includes a magnetic support, a magnetic pole assembly, and a retainer. The magnetic support is formed, at least in part, from a ferromagnetic material and is configured to be coupled to the magnetic support. The retainer is coupled to both the magnetic support and the magnetic pole assembly. The retainer is further configured to be in a first state during a first time period and a second state during a second time period, after the first time period, such that during the second time period, the coupling of the magnetic pole assembly to the magnetic support is maintained.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 5, 2014
    Applicant: BOULDER WIND POWER, INC.
    Inventors: James David Duford, Marc Eichinger, Stephane Eisen, Michael A. Kvam, Derek Petch, David Samsel, James S. Smith, Brian J. Sullivan
  • Patent number: 8729760
    Abstract: In accordance with the present invention, a rotor of an electric motor including a rotor core, a plurality of magnets spaced apart from each other on an outer circumferential surface of the rotor core, and a cylindrical protective pipe surrounding the magnets is provided. The protective pipe has an inner diameter smaller than a diameter of a circumscribed circle passing through tops of outer surfaces of the magnets. A space defined by an inner surface of the protective pipe, the outer surfaces of the magnets and the outer surface of the rotor core is filled with resin, and the protective pipe is held so as to have a diameter larger than that of the circumscribed circle, due to injection pressure of the resin.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: May 20, 2014
    Assignee: FANUC Corporation
    Inventors: Kouji Kobayashi, Takeshi Tamaki
  • Publication number: 20140132103
    Abstract: A motor may include a rotor having a rotation shaft made of metal and a cylindrical permanent magnet fixed to the rotation shaft, and a stator facing a peripheral face of the permanent magnet and is electrically insulated from the rotation shaft. The peripheral face of the permanent magnet facing the stator and the rotation shaft are electrically connected with each other.
    Type: Application
    Filed: November 12, 2013
    Publication date: May 15, 2014
    Applicant: NIDEC SANKYO CORPORATION
    Inventors: Masato GOMYO, Yoshimi TAKASU
  • Publication number: 20140125063
    Abstract: Disclosed is a generator including an inner stator including an inner stator winding, an outer stator including an outer stator winding and a rotor disposed between the inner stator and the outer stator. The rotor includes a first set of permanent magnets disposed axially, the first set of permanent magnets having a first polarity and a second set of permanent magnets disposed axially, the second set of permanent magnets having a second polarity that is opposite of the first polarity, wherein the first and second sets of permanent magnets are arranged circumferentially in alternating fashion.
    Type: Application
    Filed: November 5, 2012
    Publication date: May 8, 2014
    Inventors: Mohammad Shahamat, John F. Bangura
  • Publication number: 20140111050
    Abstract: A rotor includes a stack of metal laminations each having a plurality of magnet slots, corresponding magnet slots of the laminations being substantially aligned with one another and thereby forming longitudinal channels in the rotor, selected ones of the magnet slots having at least one feature protruding from at least one long side thereof. The rotor also includes a plurality of magnets each having a pair of long sides in cross-section, each magnet being disposed in a respective one of the longitudinal channels, and includes a thermal conductor connecting at least one of the long sides of one of the magnets with an adjacent long side of a magnet slot having the at least one feature. The feature abuts a long side of a respective one of the magnets at a distance away from the long side of the respective magnet slot.
    Type: Application
    Filed: October 24, 2012
    Publication date: April 24, 2014
    Applicant: REMY TECHNOLOGIES, LLC
    Inventor: Bradley D. Chamberlin
  • Publication number: 20140103768
    Abstract: In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture.
    Type: Application
    Filed: October 15, 2012
    Publication date: April 17, 2014
    Applicant: Regal Beloit America, Inc.
    Inventors: Subhash Marutirao Brahmavar, Lester Benjamin Manz, Ludovic Andre Chretien, Changiz Rashidzadeh, Dan Mircea Ionel
  • Patent number: 8698367
    Abstract: An electric machine is provided including a rotor having a plurality of magnets retained on the rotor. The plurality of magnets are retained via a sleeve. The sleeve is retained via a band. The band includes a stacked plurality of washer laminations. Each of the plurality of washer laminations is electrically insulated from an adjacent washer lamination.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: April 15, 2014
    Assignee: Synchrony, Inc.
    Inventors: Christopher Sortore, Victor Iannello, Robert Jett Field