With Plural Sets Of Rotating Magnets Patents (Class 310/156.36)
  • Patent number: 10879754
    Abstract: An axial flux motor having a stator and a rotor disposed about a rotational axis adjacent the stator defining an air gap therebetween. The rotor includes a disk having an interior face oriented toward the stator and an opposite exterior face; a plurality of magnets affixed in a predetermined arrangement on the interior face of the disk; a back plate abutting the exterior face of the disk, and a segmented cage fitted onto the interior face. The back plate includes a circumferential edge surface defining a plurality of notches. The segmented cage includes a plurality of retainer ribs configured to retain the magnets in the predetermined arrangement on the interior face of the disk. The segmented cage cooperates with the back plate to structurally support the disk therebetween, thereby inhibiting the disk from flexing in an axial direction.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: December 29, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Jian Yao, Chengwu Duan
  • Patent number: 10804789
    Abstract: A coaxial electromagnetic apparatus formed of at least one magnetic disk and at least one coil disk synchronously and relatively movable and staggered at intervals. The magnetic disk and the coil disk are respectively provided with at least one power-driven module and at least one power generation module. The power-driven modules are provided at the outermost diameters of the magnetic disk and the coil disk. The power generation modules are provided at the innermost diameters of the magnetic disk and the coil disk. A rotation speed of the magnetic disk is increased due to torque amplification and good magnetic current management of the power-driven modules, thereby achieving low power consumption and large thrust of the power-driven modules. The power generation modules generate high cutting frequency to increase power generated and meet the requirement for supplying power to the power-driven modules, thereby achieving autonomous power generation and a self-propelled motor.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: October 13, 2020
    Assignees: YUZEN SUSTAINABLE ENERGY CO., LTD., YUZEN (HK) SUSTAINABLE ENERGY CO., LTD., YUZEN SUSTAINABLE ENERGY PTE LTD.
    Inventors: Yung-Shun Hsu, Ming-Chun Hsu, Wen-Yu Hsu
  • Patent number: 10749420
    Abstract: According to one embodiment a synchronous reluctance rotating electrical machine of an embodiment has a shaft and a rotor core. The rotor core is fixed to the shaft, in which cavity portions being formed in a projected shape toward a radially inward direction are formed into multilayers for each pole and bridges are respectively formed between the cavity portions and an outer circumferential surface. The thickness of an outermost bridge positioned outermost on the pole end side among the plurality of bridges is formed to be gradually thicker from the pole center side toward the pole end side. Among the plurality of bridges, the thickness of an intermediate bridge positioned on the pole center side of the outermost bridge with one bridge interposed therebetween is formed to be gradually thicker from the pole end side toward the pole center side.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: August 18, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Norio Takahashi, Katsutoku Takeuchi, Makoto Matsushita, Daisuke Misu, Toshio Hasebe
  • Patent number: 10734873
    Abstract: A motor includes a rotation shaft, a magnet unit fixed to the rotation shaft to rotates with the rotation shaft, and a coil unit arranged to face the magnet unit in an axial direction. The magnet unit includes a magnet ring in which magnets are arranged in a circumferential direction of the rotation shaft, and a holding ring provided at an outer peripheral side of the magnet ring to hold the magnet ring. The holding ring includes a composite material in which a carbon fiber is impregnated with resin. The carbon fiber includes a pitch-based carbon fiber and a PAN-based carbon fiber. A volume ratio of the pitch-based carbon fiber is larger than that of the PAN-based carbon fiber in a portion at an outer peripheral side; a volume ratio of the PAN-based carbon fiber is larger than that of the pitch-based carbon fiber in a portion at an inner peripheral side.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: August 4, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Inomoto, Kodai Shimono, Ryoji Okabe
  • Patent number: 10476324
    Abstract: A hybrid field electric motor includes a rotor with a rotor core rotating about an axial axis and having a rotor surface with at least one sloping edge face and a radial edge face. The stator includes a stator core and radial pole faces spaced by a gap from the radial edge face of the rotor for radially directing flux into the rotor core. The stator has sloping pole faces spaced from the sloping edge face of the rotor core for flux directed into the rotor core at an angle between radial and axial. The rotor core and/or stator core are made of a soft magnetic composite material for flux in inure than one plane in the core(s).
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 12, 2019
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah
  • Patent number: 10014736
    Abstract: In a rotor of a permanent magnet-embedded motor, a plurality of permanent magnets is arranged in one magnet housing of a rotor core. A rib portion which connects an outer peripheral portion of the rotor core with an inner peripheral portion of the rotor core is arranged per plurality of magnetic poles.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: July 3, 2018
    Assignee: SANYO DENKI CO., LTD.
    Inventor: Toshihito Miyashita
  • Patent number: 10008891
    Abstract: A rotor with permanent magnets comprising: a stack of laminations forming the core of the rotor having an axis, housings spaced evenly apart on the circumference of the rotor and located in the core of the rotor, some of which receive at least one element in the form of a permanent magnet held radially and axially inside the housing between an inner axial part of the housing and an outer axial part, the inner axial part of the housing comprising two concave portions and a protruding portion extending axially according to the axis, the protruding portion being radially closer to the inner axial face of the magnet than the two concave portions. Moreover, recesses are provided in the core and positioned between the housings on a trajectory successively linking the protruding portions of consecutive housings.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: June 26, 2018
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Khadija El Baraka, Svetislav Jugovic, Frederic Palleschi, Jerome Legranger
  • Patent number: 9705431
    Abstract: A useful technique for the temporary modification of Fermion mass at room temperature in certain metalloids is disclosed. This technique has demonstrated an easily observable weight modification effect, using novel but comparatively inexpensive materials, in an industrial or every-day environment, at room temperature. Various simple and easily engineered methods for converting this modification into a useful source of propulsive directed force are disclosed.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: July 11, 2017
    Inventor: Debora A. Reiter
  • Patent number: 9614417
    Abstract: According to an aspect of the present invention, an axial flux permanent magnet motor includes: a stator assembly configured to produce magnetic flux in a rotating axis direction; and a housing assembly including a motor housing in which the stator assembly is accommodated, in which a first cooling groove is formed in an inner circumferential surface of the motor housing to be predeterminedly and circumferentially extended, a second cooling groove, which corresponds to the first cooling groove, is formed in an outer circumferential surface of the stator assembly so as to be predeterminedly and circumferentially extended, and the first and second cooling grooves meet together to form a cooling flow path for a flow of a coolant.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: April 4, 2017
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Sang Han Lee
  • Patent number: 9000647
    Abstract: An electric motor that generates mechanical energy whilst increasing both the motor efficiency and the mechanical power density. The electric motor includes: a plurality of disk surfaces having a main longitudinal axis; a plurality of stationary support structures; and a rotating shaft affixed to the disk surfaces. Each disk surface is coupled to an array of offset magnets. The magnets are arranged as matching magnetic pairs on two adjacent disk surfaces to create a plurality of magnetic fields between the matching magnetic pairs. The magnetic fields are titled at an angle A with respect to the main longitudinal axis. Each stationary support structure has an electromagnetic coil array located in-between each of the matching magnetic pairs, which provides an axial magnetic field when voltage is applied on the electromagnetic coil. Each of the electromagnetic coil array is titled at said angle A with respect to the main longitudinal axis.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: April 7, 2015
    Inventor: Uri Rapoport
  • Patent number: 8994239
    Abstract: An axial flux Halbach rotor comprise: a first magnet set and a second magnet set. Further comprises: a plurality of first magnets that are respective featured by their respective first magnetizing directions and are arranged interconnecting to each other by the use of a first connecting element while allowing any two neighboring first magnets to be spaced from each other by a first distance; and the second magnet set further comprises: a plurality of second magnets that are respectively featured by their respective second magnetizing directions and are arranged interconnecting to each other by the use of a second connecting element while allowing any two neighboring second magnets to be spaced from each other by a second distance. In addition, the first magnet set and the second magnet set are arranged inlaid into each other while allowing the plural first magnets and the plural second magnets to be dispose alternatively.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: March 31, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Wen-Yang Peng, Han-Ping Yang, Cheng-Hsuan Lin, Chau-Shin Jang
  • Patent number: 8987963
    Abstract: In a double drive shaft motor, a stator and a field rotor are arranged at a radially outer side of a magnetic modulation rotor. The stator and the field rotor are arranged in series in an axial direction of the motor. This structure increases an amount of a winding coil of the stator and magnets in the field rotor, and an output torque of the motor. When a field magnetic flux passes through soft magnetic material members in the magnetic modulation rotor, because the generation and the reception of the magnetic flux can occur at a radially same side of the magnetic modulation rotor, this structure cancels an eddy current generated in the soft magnetic members and supporting members made of non-magnetic metal which tightly support the soft magnetic member. This structure provides a reduced axial size of the motor with high performance.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 24, 2015
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Akira Fukushima
  • Patent number: 8952587
    Abstract: Apparatus and method for tuning the magnetic field of windmill generators to obtain efficient operation over a broad RPM range. The windmill generator includes fixed windings (or stator) inside a rotating rotor carrying permanent magnets. The permanent magnets are generally cylindrical and have North and South poles formed longitudinally in the magnets. Magnetically conducting circuits are formed by the magnets residing in magnetic conducting pole pieces (for example, low carbon or soft steel, and/or laminated insulated layers, of non-magnetizable material). Rotating the permanent magnets, or rotating non-magnetically conducting shunting pieces, inside the pole pieces, either strengthens or weakens the resulting magnetic field to adjust the windmill generators for low RPM torque or for efficient high RPM efficiency. Varying the rotor magnetic field adjusts the voltage output of the windmill generators allowing the windmill generator to maintain a fixed voltage output.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: February 10, 2015
    Inventor: Louis J. Finkle
  • Patent number: 8937418
    Abstract: A rotor core according to an embodiment includes a pair of magnet openings disposed such that a space therebetween widens toward an outer peripheral side and in which a pair of permanent magnets having a magnetic pole direction relative to a radial direction identical to each other are inserted. The magnet openings each have a shape that connects together a first opening portion formed along the profile of the corresponding permanent magnet and a second opening portion that, when the permanent magnet is inserted in the first opening portion, covers, out of corner portions of the permanent magnet, a corner portion closest to the other permanent magnet with an air gap defined therebetween. The second opening portion forms a bridge portion between the second opening portion and the second opening portion of the other magnet opening.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: January 20, 2015
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Daisuke Morishita, Yuki Ochiai
  • 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
  • Publication number: 20140319950
    Abstract: The Disc Alternator or Motor utilizes a magnetic field orientation that is parallel to the armature. With this orientation, multiple disc's are utilized to increase square area of induction and to provide a stronger field induction into the coils of a disc alternator or inversely a greater magnetic rotational force on magnetic or ferris armature disc's of a disc motor.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 30, 2014
    Inventor: Byron Earl Hough
  • Patent number: 8847451
    Abstract: A first bias magnetic flux may be communicated between a first axial pole and a first axial facing surface of the body. A second bias magnetic flux may be communicated between a second axial pole and a second axial facing surface of the body. A time-varying axial control magnetic flux may be communicated through the first and second axial facing surfaces of the body, and may be generated in a magnetic circuit including the body, the first and second axial poles, and an axial magnetic backiron. The first and second axial poles may include axial pole laminated inserts composed of electrically isolated steel laminations stacked along the body axis. The axial magnetic backiron may include laminated inserts composed of electrically isolated steel laminations stacked in the direction tangential to the body axis. The axial pole laminated inserts may be magnetically coupled to the axial magnetic backiron laminated inserts.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: September 30, 2014
    Assignee: Calnetix Technologies, L.L.C.
    Inventors: Alexei V. Filatov, Lawrence A. Hawkins
  • Patent number: 8841809
    Abstract: A synchronous multipolar brushless machine includes an immobile stator armature and field windings, which are placed concentrically around a shaft and radially inwardly positioned relative to the stator armature, on a power unit carrying disc, so that the field windings and armature windings form a mechanically connected unit which generates an excitation magnetic field, and in which an alternate voltage is generated. The excitation magnetic field is transferred to a rotor via labyrinth shaped first and second air gaps. A multipolar rotating magnetic field is generated around the stator armature while the synchronous machine is operated, thereby magnetizing the rotor. In order to reduce magnetic flux resistance, a ferromagnetic tolerance ring is inserted in each first and second air gap. Alternatively, a ferrofluid is provided in each first and second air gap, which significantly increases the magnetic conductivity.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: September 23, 2014
    Inventor: Daniel Zrno
  • Patent number: 8710786
    Abstract: An actuator motor described herein has fast dynamic response capability, high torque density, high efficiency, and improved thermal and mechanical stability at high speed while minimizing weight. According to one aspect of the disclosure provided herein, an actuator motor has a rotor shaft with an array of permanent magnets attached according to a Halbach array configuration. A stator includes windings that induce a torque on the rotor shaft when rotating magnetic fields interact with the optimized magnetic flux distributions of the magnets of the Halbach array. According to various embodiments, the rotor shaft is hollow, reducing weight and rotational inertia, while improving ambient cooling characteristics of the motor.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: April 29, 2014
    Assignee: The Boeing Company
    Inventors: Leila Parsa, Jeffrey M. Roach, Kamiar J. Karimi, Shengyi Liu, Suman Dwari
  • Publication number: 20140062238
    Abstract: A modular electrical machine includes multiple integrated rotor modules releasably mounted upon a power transmission member to form a torus-like structure, wherein each integrated rotor module includes a series of parallel rotor plates spaced apart to provide an air gap between successive rotor plates in the series. The rotor plates hold permanent magnets securely within the air gap. Corresponding stator modules, each made of multiple air-cored coils potted in a resin material to form a blade. Each blade is externally supported with respect to the rotor module and is positioned between the permanent magnets within one of the air gaps between successive rotor plates.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 6, 2014
    Inventors: Markus Anton Mueller, Alasdair Stewart McDonald
  • Patent number: 8664962
    Abstract: The N1(s) turns of a first output winding is divided by a split ratio ? into N1a(s) turns of a lower-layer first output winding and N1b(s) of an upper-layer first output winding. The lower-layer first output winding is continuously wound around all slots as the undermost layer. A second output winding is continuously wound around all slots over the lower-layer first output winding. An upper-layer first output winding is continuously wound around all slots over the second output winding. The split ratio ? is adjusted only in the slots where the detection accuracy decreases. This equalize the contribution of the first output windings and the second output winding to the flux linkage, thereby achieving high angle detection accuracy.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: March 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Takashi Ogawa, Yuichi Yoshikawa, Yasuji Echizen, Masahiko Kobayashi, Masaaki Nishiyama
  • Patent number: 8648512
    Abstract: An improved generator for using waterpower, wave-power or wind-power, comprising; a set of magnet plates and coil plates for mounting on a rotating shaft in parallel, the magnets installed on the magnet plates and the generating coils installed on the coil plates with constant-intervals in radial direction, a plurality of blades obliquely installed on circumference of the magnet plates and coil plates with mutually opposite direction, an inner annular cylinder and outer annular cylinder mounted on the coil plates to form annular container for inserting the magnets. A plurality of induction coils installed on the inner annular cylinder, a plurality of electromotive coils installed on the outer annular cylinder for proximately contact with ends of the magnets. The magnet plates and coil plates rotate in mutually opposite direction to enhance the quality of generation and repulsive force.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: February 11, 2014
    Inventor: Suk Ho Jang
  • Publication number: 20130342054
    Abstract: Aspects and embodiments disclosed herein include a highly efficient electric motor which can be embodied in several configurations, including a standard motor, a hub motor, a linear motor, or other motor configuration. In one example, there is provided a motor comprising a rotor including a plurality of magnets and a stator including at least one coil module, the at least one coil module including a plurality of coils of conductive material, the plurality of coils arranged horizontally displaced to from one another and retained in a matrix material of the at least one coil module.
    Type: Application
    Filed: April 26, 2013
    Publication date: December 26, 2013
    Inventors: J. Darin Long, Michael J. McDaniels, Kevin H. Mosley, Denis Palmer, Ed Butler
  • Patent number: 8604804
    Abstract: The N1(s) turns of an output winding is divided by a split ratio ? into N1a(s) turns of an output winding (1a) and N1b(s) turns of an output winding (1b). The output winding (1a) is continuously wound around all slots as the undermost layer. Output winding 2, which is different in phase by 90 degrees from the output winding (1a), is continuously wound around all the slots over the output winding (1a). An output winding (1b) is continuously wound around all the slots over output winding 2. This equalizes the contribution of the output winding and output winding 2 to the flux linkage, thereby achieving high angle detection accuracy.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 10, 2013
    Assignee: Panasonic Corporation
    Inventors: Takashi Ogawa, Yuichi Yoshikawa, Yasuji Echizen, Masahiko Kobayashi, Masaaki Nishiyama
  • Patent number: 8587175
    Abstract: A rotor of a rotary electric machine includes a rotor core and a plurality of magnetic parts. The rotor core has a plurality of slots provided along a circumferential direction. Each of the slots is separated by a center rib. The plurality of magnetic parts are disposed inside the rotor core along the circumferential direction at a predetermined interval. Each of the magnetic parts has a magnetization direction alternating with each other. Each of the magnetic parts includes a pair of permanent magnets placed inside each of the slots. The rotor core comprises a plurality of through-holes and a reinforcement rib. The plurality of through-holes each extend in an axial direction on an inner circumferential side of each of the magnetic parts. The reinforcement rib is disposed in each of the through-holes and in alignment with a circumferential center line of the center rib.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tadashi Yamaguchi, Masashi Inoue
  • Patent number: 8581465
    Abstract: A generator comprises: a stator plate having a first fixed permanent magnet including a plurality of magnets on one side and a second fixed permanent magnet including a plurality of magnets on the other side; a first armature having a first switching winding, a first output winding, and a first back-electromotive force prevention winding on a fixed first ring core; a second armature having a second switching winding, a second output winding, and a second back-electromotive force prevention winding on a fixed second ring core; a first rotor plate having a first rotary permanent magnet; and a second rotor plate having a second rotary permanent magnet. The first and second rotor plates are coupled to each other by a driving shaft.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: November 12, 2013
    Assignee: Koueidenshi Corporation
    Inventor: Tetsuo Okamoto
  • Patent number: 8575806
    Abstract: A power generating structure comprises a front magnetic disc, a rear magnetic disc, and a coil disc disposed between the front and the rear magnetic discs. The coil disc is provided with a plurality of coil units radially arranged. Each coil unit includes a plurality of coils each with different turns of insulated wire. The front and the rear magnetic discs are respectively provided with a plurality of magnetic elements radially arranged. The coil disc is fixed to a shaft at a center thereof. The shaft extends outwardly from the rear magnetic disc. A plurality of blades can be attached to a periphery of the front or the rear magnetic disc. Therefore, the blades can be driven to rotate the front and the rear magnetic discs to have the coils of coil units continuously induced different voltages by the magnetic elements to supply various equipment.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: November 5, 2013
    Inventors: Chung-Yi Kuo, Shyh-Shiaw Lee
  • Patent number: 8471425
    Abstract: Various embodiments relate generally to electrodynamic machines and the like, and more particularly, to rotor assemblies and rotor-stator structures for electrodynamic machines, including, but not limited to, outer rotor assemblies and/or inner rotor assemblies with a corresponding stator assembly. In some embodiments a rotor assembly can include magnetically permeable structures having confronting surfaces oriented at an angle to the axis of rotation. A group of magnetic structures can be interleaved with the magnetically permeable structures. The magnetically permeable structures can also include non-confronting surfaces adjacent to which boost magnets are disposed to enhance flux in a flux path passing through magnetic structures that are interleaved with magnetically permeable structures. Further, the rotor assemblies can include a flux conductor shield disposed adjacent to the boost magnets, the flux conductor shield configured to provide return flux paths.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: June 25, 2013
    Assignee: NovaTorque, Inc.
    Inventors: John P. Petro, Ken G. Wasson, Donald Burch, Jeremy Mayer, Michael Regalbuto
  • Publication number: 20130154449
    Abstract: A disk-shaped multi combined three-dimensional permanent magnet motor is provided. Two independent disk-shaped stators are respectively provided on a left side and a right side in a shell. A disk-shaped rotor with permanent magnets adhered on both a left face and a right face thereof is provided between the two independent disk-shaped stators. Spindle hole in the center of the rotor is coupled with a spindle of the main dynamical axis. Nine motor winding coils provided in side face slots of the disk-shaped stators are a unit for one motor. The left and right stators serve as one group to determine pole-pairs number of the motor which further determines numbers of the permanent magnets adhered. The motor is capable of driving load at low speed and meeting the function requirements of low-speed and high torque, which greatly improve efficiency of the whole machine.
    Type: Application
    Filed: November 29, 2012
    Publication date: June 20, 2013
    Inventor: Kunyuan Shen
  • Patent number: 8446121
    Abstract: An actuator motor described herein has fast dynamic response capability, high torque density, high efficiency, and improved thermal and mechanical stability at high speed while minimizing weight. According to one aspect of the disclosure provided herein, an actuator motor has a rotor shaft with an array of permanent magnets attached according to a Halbach array configuration. A stator includes windings that induce a torque on the rotor shaft when rotating magnetic fields interact with the optimized magnetic flux distributions of the magnets of the Halbach array. According to various embodiments, the rotor shaft is hollow, reducing weight and rotational inertia, while improving ambient cooling characteristics of the motor.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: May 21, 2013
    Assignee: The Boeing Company
    Inventors: Leila Parsa, Jeffery M. Roach, Kamiar J. Karimi, Shengyi Liu, Suman Dwari
  • Patent number: 8426991
    Abstract: A power generator has a magnet rotor rotating upon receiving rotating force from a driving source and a stator coil arranged to face magnetic poles of the magnet rotor. The magnet rotor includes a rotary shaft supported by a housing and a permanent magnet. The stator coil includes coreless winding wires arranged to face the magnetic poles and a three-phase output terminal. The coreless winding wires are formed of effective output winding wires and connected with the three-phase output terminal through a switching device. The switching device is connected to a controlling device. The magnet rotor has a discoid shape including the rotary shaft at the center. The coreless winding wires form a pair of coil bodies arranged to sandwich the magnetic poles. The switching device changes the inductance value to a small value or a large value by connecting the winding wires to the three-phase output terminal.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: April 23, 2013
    Assignee: Nisca Corporation
    Inventor: Yukihiko Hayakawa
  • Publication number: 20130049512
    Abstract: An axial flux synchronous generator for wind turbine generators is provided including a shaft coupled to receive power with a power generating apparatus for the wind turbine; a rotor coupled rotatably to the shaft and having upper and lower disk-like faces affixed with a plurality of skewed permanent magnets having north-south (N-S) pole pairs and distantly arranged; an upper stator and a lower stator both having a plurality of slots formed similar to the skewed permanent magnets for taking windings of a coil, the upper stator being displaced relative to the lower stator by an electric angle in the range of 25˜30°; an upper housing and a lower housing for housing the rotor, the upper stator and the lower stator together; and a hub housing for fastening the upper housing and the lower housing to maintain constant gaps between the rotor and the upper stator and the lower stator.
    Type: Application
    Filed: June 18, 2012
    Publication date: February 28, 2013
    Applicant: UNDUSTRY-ACADEMIC COOPERATION FOUNDATION OF KYUNGNAM UNIVERSITY
    Inventor: Taeuk Jung
  • Patent number: 8378545
    Abstract: An electrical rotary machine is provided comprising a first stator core section being substantially circular and including a plurality of teeth, a second stator core section being substantially circular and including a plurality of teeth, a coil arranged between the first and second circular stator core sections, and a rotor including a plurality of permanent magnets. The first stator core section, the second stator core section, the coil and the rotor are encircling a common geometric axis, and the plurality of teeth of the first stator core section and the second stator core section are arranged to protrude towards the rotor. Additionally, the teeth of the second stator core section are circumferentially displaced in relation to the teeth of the first stator core section, and the permanent magnets in the rotor are separated in the circumferential direction from each other by axially extending pole sections made from soft magnetic material.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: February 19, 2013
    Assignee: Hoganas AB (Publ)
    Inventors: Alan Jack, Edwin Pinguey, Göran Nord
  • Patent number: 8350433
    Abstract: It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: January 8, 2013
    Assignee: Panasonic Corporation
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami
  • Patent number: 8344567
    Abstract: A rotating electrical machine includes a flange provided at one end of a hollow frame in an axial direction; a rotor including a shaft, the shaft being rotatably supported by the flange; and a stator fixed to an inner section of the frame, the stator surrounding the rotor. The rotor includes a first rotor core and a second rotor core arranged in the axial direction and having recesses formed in the axial direction, and a rotor-core space defined by the recesses that are formed in the first rotor core and the second rotor core and that face each other.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: January 1, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Yasuaki Kamiki
  • Publication number: 20120319518
    Abstract: An electric motor that generates mechanical energy whilst increasing both the motor efficiency and the mechanical power density. The electric motor includes: a plurality of disk surfaces having a main longitudinal axis; a plurality of stationary support structures; and a rotating shaft affixed to the disk surfaces. Each disk surface is coupled to an array of offset magnets. The magnets are arranged as matching magnetic pairs on two adjacent disk surfaces to create a plurality of magnetic fields between the matching magnetic pairs. The magnetic fields are titled at an angle A with respect to the main longitudinal axis. Each stationary support structure has an electromagnetic coil array located in-between each of the matching magnetic pairs, which provides an axial magnetic field when voltage is applied on the electromagnetic coil. Each of the electromagnetic coil array is titled at said angle A with respect to the main longitudinal axis.
    Type: Application
    Filed: June 13, 2012
    Publication date: December 20, 2012
    Inventor: Uri RAPOPORT
  • Publication number: 20120319519
    Abstract: An electrical power generator that increases both power generation efficiency and electrical power density. The generator includes: a plurality of disk surfaces; a plurality of stationary supports; and a rotating shaft affixed to each of the disk surfaces. Each disk surface is coupled to an array of magnets arranged as matching magnetic pairs on two adjacent disk surfaces so as to create a plurality of magnetic fields between the matching magnetic pairs. Each stationary support sustains an array of electromagnetic coils. Each coil is disposed in-between each of the matching magnetic pairs. Each rotating shaft rotates each of the matching magnetic pairs around the generator coils such that a time varying magnetic flux is provided and electrical power is generated in each of the generator coils.
    Type: Application
    Filed: June 13, 2012
    Publication date: December 20, 2012
    Inventor: Uri RAPOPORT
  • Patent number: 8314577
    Abstract: An energy converter includes magnetic coils of N phases (N is an integer of 3 or more), and a PWM drive circuit for driving the magnetic coils of N phases, wherein the magnetic coil of each phase can be independently controlled by the PWM drive circuit.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: November 20, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Kesatoshi Takeuchi, Kazuyoshi Nakamura
  • Patent number: 8288908
    Abstract: A reconfigurable electric motor includes a rotor containing rotatable permanent magnets or non-magnetically conducting shunting pieces. The magnets and/or shunting pieces have a first position producing a weak magnetic field for asynchronous induction motor operation at startup and a second position producing a strong magnetic field for efficient synchronous operation. The motor includes a squirrel cage for induction motor operation at startup with the permanent magnets and/or shunting pieces positioned to product the weak magnetic field to not interfere with the startup. When the motor approaches or reaches synchronous RPM, the permanent magnets and/or shunting pieces rotate to produce a strong magnetic field for high efficiency synchronous operation.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: October 16, 2012
    Inventors: Louis J. Finkle, Andrea Furia
  • Patent number: 8283829
    Abstract: There is provided an axial gap motor including a rotor rotatable around a rotation axis; and a first stator and a second stator arranged to face each other with the rotor therebetween from both sides of the rotor in the rotation axis direction of the rotor, wherein the rotor includes a plurality of main permanent magnets having magnetizing directions in the rotation axis direction of the rotor and arranged in a peripheral direction of the rotor; a partition member arranged between the main permanent magnets which are adjacent to each other in the peripheral direction of the rotor, the partition member including a nonmagnetic material; and auxiliary permanent magnets having a magnetizing direction that is orthogonal both to the rotation axis direction of the rotor and a radial direction of the rotor, and arranged on both sides of the partition member in the rotation axis direction of the rotor.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: October 9, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Keiichi Yamamoto, Hirofumi Atarashi, Shoei Abe
  • Patent number: 8258734
    Abstract: An energy converter includes magnetic coils of N phases (N is an integer of 3 or more), and a PWM drive circuit for driving the magnetic coils of N phases, wherein the magnetic coil of each phase can be independently controlled by the PWM drive circuit.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: September 4, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Kesatoshi Takeuchi, Kazuyoshi Nakamura
  • Patent number: 8237321
    Abstract: The invention relates to an electrical machine (1, 2, 210) or its use as a wind power generator and a wind power installation having this electrical machine. The electrical machine has a primary part (3, 4, 222, 212, 213) and a secondary part (5, 6, 224), wherein a disc-like primary part (3, 4, 222, 212, 213) and a disc-like secondary part (5, 6, 224) are provided for forming a disc-shaped air gap, or wherein the electrical machine (1, 2, 210) has a cylindrical primary part (3, 4, 212, 213) and a cylindrical secondary part (5, 6, 224) for forming a cylindrical air gap, wherein a primary part, which can be used for a linear motor, is also used for forming the cylindrical primary part (3, 4, 222, 212, 213).
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: August 7, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Hoppe, Johannes Wollenberg
  • Patent number: 8232701
    Abstract: To provide a magnetic machine capable of reducing the ripple and cogging of torque or thrust. An electric motor 1 includes three stators 6 to 8 each having an armature row, a rotor 3 having a permanent magnet row, and a rotor 10 having a soft magnetic material row. The respective phases in electrical angle between magnetic poles generated at respective armatures 6a to 8a of the armature row and the magnetic poles of the permanent magnet row are set to be each displaced in a predetermined direction by an electrical angle of 2?/3, and the respective phases in electrical angle between the magnetic poles generated at the respective armatures 6a to 8a of the armature row and soft magnetic material cores 11b to 13b of the soft magnetic material row are set to be each displaced in the predetermined direction by an electrical angle of ?/3.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: July 31, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kota Kasaoka, Noriyuki Abe, Shigemitsu Akutsu, Satoyoshi Oya
  • Publication number: 20120169161
    Abstract: The present invention relates to a disk-type motor using a permanent magnet, wherein the permanent magnet is arranged on a disk-type rotor (300), and a stator core (202) and a power-generating coil (204) are arranged on a stator (200) to obtain a high-efficiency motor which self-generates power upon being driven. (2) A special device is needed to reduce the consumption of electrical energy for driving a motor, and a special circuit for bypassing the magnetic force of a magnet is also needed. (3) To bypass the magnetic force, a bypass core (101.205) and a magnetic core (301) are employed to constitute a circuit for bypassing the magnetic force, and a magnetic flux path for bypassing the magnetic force is formed. Thus, a special circuit which can significantly reduce the consumption of electrical energy is obtained.
    Type: Application
    Filed: August 17, 2010
    Publication date: July 5, 2012
    Inventor: Kyoung-Sik Woo
  • Publication number: 20120139379
    Abstract: A rotating machine is provided, including a rotor and a stator set. The rotor rotates around an axis, wherein the rotor includes a first permanent magnet set and a second permanent magnet set, the first permanent magnet set is magnetized in a circumference direction of the axis, and the second permanent magnet set is magnetized in an axial direction of the axis. The stator set corresponds to the rotor, wherein the stator set includes a radial stator member and an axial stator member, the axial stator member corresponds to the rotor in the axial direction of the axis, and the radial stator member corresponds to the rotor in a radial direction of the axis.
    Type: Application
    Filed: September 20, 2011
    Publication date: June 7, 2012
    Inventors: Xiao GE, Jian-Ping Ying, Hong-Cheng Sheu, Hongliu Zhu
  • Patent number: 8148865
    Abstract: Movement of magnets due to centrifugal force is restricted. In a permanent magnet rotating electrical machine 100 having a stator 1 and a rotor core 5 provided with a plurality of permanent magnets 3 inserted in an outer circumferential portion of the rotor 5, each permanent magnet 3 has inclined surfaces on the outer circumferential side of the rotor 2 and the thinnest portions of the inclined surfaces are adjacent to permanent magnets of the opposite polarity. Further, each magnet 3 has a convex-shaped cross section and is divided into two magnet segments 3, 3. A magnetic pole bridge 15 is formed at the boundary of the permanent magnet segments 3, 3. Thus, movement of the permanent magnet segments 3, 3 due to centrifugal force is firmly restricted, and the peeling off of the rotor core 5 and the permanent magnet segments 3, 3 from each other is prevented.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 3, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Mamoru Kimura, Daisuke Kori, Hiroyuki Mikami, Seikichi Masuda, Masayasu Fujieda
  • Patent number: 8134266
    Abstract: It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: March 13, 2012
    Assignee: Panasonic Corporation
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami
  • Patent number: 8134267
    Abstract: The present invention relates to a motor. A motor including a stator and a rotor that is rotatably provided at an outer side in a radial direction of the stator, the rotor comprising: a base part; a side wall part that is integrally formed with the base part and vertically extended with respect to the base part; and a permanent magnet that is provided at an inner side of the side wall part, wherein a spacing distance from an inner side surface of the base part to a lower end of the permanent magnet is formed to be larger than a radial thickness of the permanent magnet.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: March 13, 2012
    Assignee: LG Electronics Inc.
    Inventor: Sung Jung Kim
  • Patent number: 8131413
    Abstract: An electric motor and conversion system includes a direct current power source, a rotor with two sides and two series of permanent magnets alternating in polarity, two stators on opposing sides of the rotor where each stator has a series of winding coils, magnet position identifiers, and a control system comprising a sensor that cooperates with the magnet position identifiers and a microcontroller to individually controls winding drivers. Preferably, the number of magnets on the rotor does not equal the number of winding coils on the stators. Also preferably, the magnet position identifiers are a series of apertures on the rotor through which signals pass. The conversion system can also include connectors for connecting to an axle, a removable throttle, and electric cables for electrically connecting the components.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: March 6, 2012
    Assignee: Max Power Motors, LLC
    Inventor: Max Yuan
  • Patent number: 8120222
    Abstract: A rotating electrical machine includes a stator and a rotor arranged to rotate inside the stator. The rotor includes a plurality of permanent magnets arranged to produce a radial magnetic flux in an airgap between the rotor and the stator. The machine also includes a stationary excitation coil. The rotor also includes a plurality of low reluctance elements. A current through the stationary excitation coil causes a magnetic flux to be established in a magnetic flux path which passes into the rotor through a first low reluctance element and out of the rotor through a second low reluctance element, which magnetic flux combines with the radial magnetic flux produced by the permanent magnets in the airgap. This arrangement can allow control of the field within a permanent magnet radial flux machine.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: February 21, 2012
    Assignee: Cummins Generator Technologies Limited
    Inventor: Neil Brown