With Single Rotor Magnet And Plural Stators Patents (Class 310/156.35)
  • Patent number: 10637305
    Abstract: This double stator-type rotary machine is provided with: an annular rotor; an outer stator that is disposed on the outer side of the rotor; and an inner stator that is disposed on the inner side of the rotor. The rotor is provided with permanent magnets that are arranged on the inner stator side.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: April 28, 2020
    Assignee: IHI CORPORATION
    Inventors: Narifumi Tojima, Takehiro Jikumaru
  • Patent number: 10608509
    Abstract: An apparatus includes a rotatable common shaft configured to be rotatable about a longitudinal shaft axis extending along the rotatable common shaft. Rotatable electric machines are arranged on the rotatable common shaft. This is done in such a way that disk assemblies of the rotatable electric machines and the rotatable common shaft are concurrently rotatable. The rotatable electric machines are arranged on the rotatable common shaft in such a way that the net cogging force, which is generated by the rotatable electric machines, and which is imparted to the rotatable common shaft, is reduced.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: March 31, 2020
    Inventor: Roul Delroy Martin
  • Patent number: 10505483
    Abstract: Disclosed are fault-tolerant permanent-magnet vernier cylindrical electric motors with an electromagnetic suspension and a fault-tolerant vector control method for a short circuit of two adjacent phases. The fault-tolerant permanent-magnet vernier cylindrical electric motor with an electromagnetic suspension and the fault-tolerant vector control method for a short circuit of two adjacent phases suppress motor thrust ripples caused by a fault of two adjacent phases of an electric motor. The dynamic performance and the steady-state performance thereof are consistent with those under a normal state, and the switching frequency of a voltage source inverter is constant.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: December 10, 2019
    Assignee: JIANGSU UNIVERSITY
    Inventors: Huawei Zhou, Zhen Lu, Guohai Liu, Wenxiang Zhao, Jinghua Ji, Long Chen
  • Patent number: 10340753
    Abstract: The described technology relates to a stator of a planar type motor and a planar type motor using the same, which are easy to manufacture and are capable of reducing core losses, thereby maximizing motor performance. First cores that are difficult to form by stacking electrical steel plates are formed of soft magnetic powders, and second cores that are formed by stacking electrical steel plates having the same size are arranged in a region where a vortex is concentrated, thereby allowing easy manufacture and being capable of maximizing the performance of the planar type motor.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: July 2, 2019
    Assignee: Korea Electronics Technology Institute
    Inventors: Sehyun Rhyu, Youngkyoun Kim, Jungmoo Seo, Jeongjong Lee, Insoung Jung
  • Patent number: 10199889
    Abstract: An electric machine including a rotor and an annularly-shaped first stator is provided. The rotor includes an annularly-shaped rotor body and permanent magnets positionally-fixed relative to the rotor body. The first stator includes circumferentially-spaced stator poles. The rotor and the first stator are concentric and axially-aligned relative to an axial centerline of the electric machine. Each of the permanent magnets creates a magnetic dipole. Each magnetic dipole extends along a dipole axis that passes through the respective permanent magnet. Each dipole axis extends in a first plane. The centerline of the electric machine extends in a second plane that is at least substantially perpendicular to the first plane. Each of the permanent magnets is positioned so that a magnet angle that is between 15° and 75° is defined between the respective dipole axis and a radial axis that extends between the respective permanent magnet and the centerline.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: February 5, 2019
    Assignee: Otis Elevator Company
    Inventors: Zbigniew Piech, Jagadeesh Tangudu, Richard A. Himmelmann
  • Patent number: 10141822
    Abstract: An axial flux brushless permanent magnet electrical machine having a stator and at least one rotor. The rotor includes a Halbach array of magnets with at least four magnets per magnetic cycle. The rotor magnets are contained within pockets in the rotor. The pockets are formed with magnet pocket walls being radial walls, active surface walls, and/or inactive surface walls where the walls retain the magnets within the pockets.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: November 27, 2018
    Assignee: LAUNCHPOINT TECHNOLOGIES, INC.
    Inventors: Michael Richard Ricci, Jonathan Gordon Sugar, Bradley Evan Paden, David Brian Paden
  • Patent number: 10008890
    Abstract: A rotor and an electric motor including the rotor are provided. The electric motor includes a rotor and a plurality of stators. The rotor includes a plurality of main magnets that are disposed spaced apart from each other along a circumferential direction with respect to a rotation axis of the rotor, and have a magnetizing direction that is a direction of the rotation axis, a plurality of auxiliary magnetic units that are disposed on both sides of each of the main magnets in the direction of the rotation axis, and have a magnetizing direction that is the circumferential direction, so as to concentrate magnetic flux in each of the main magnets, and a plurality of webs that are disposed between the auxiliary magnetic units so as to generate a reluctance torque.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: June 26, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Won-Ho Kim, Seong-Taek Lim, Jin-Woo Cho
  • Patent number: 9853509
    Abstract: Torque is improved in a composite torque rotating electric machine that uses permanent magnets having a low residual magnetic flux density such as ferrite magnets, and includes: a stator comprising armature windings arranged at a fixed interval at multiple positions on the inner periphery; a rotor which has a permanent magnet in a cylindrical core comprising laminated magnetic steel sheets and is arranged inside of the stator; and magnetic flux blocking units provided across the circumferential direction on the outer periphery of the rotor that block the closed loop magnetic flux generated around the stator windings. The magnetic flux blocking units can be multiple permanent magnets, with a non-magnetic body such as an air gap disposed between them. The distance between the permanent magnets and the non-magnetic part can be smaller than the interval at which the armature windings are arranged.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: December 26, 2017
    Assignee: AIDA ENGINEERING, LTD.
    Inventors: Yukinari Fujisawa, Masataka Yahara, Hiroshi Nagase, Fumio Tajima, Yoshihiro Yamaguchi
  • Patent number: 9755463
    Abstract: An electric machine comprise a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: September 5, 2017
    Assignee: Genesis Robotics LLP
    Inventors: James Brent Klassen, Stephen Smith Chamberlain
  • Patent number: 9735658
    Abstract: Provided are a motor and a sensing magnet of the motor. The sensing magnet includes a through hole that is positioned at a center portion thereof, and a plurality of poles which are formed along an outer periphery thereof. Here, the plurality of poles includes a first pole and a second pole extending from the first pole in a direction of the through hole.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: August 15, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Shung Hun Woo
  • Patent number: 9461510
    Abstract: A 2-pole machine arrangement (10) has a stator (100) with windings (101) in conventional form, wound either in a single phase or three phase configuration. The rotor is formed of stacked laminations. The laminations include rotor pole pieces (107) located between the two magnetic poles. Each pole is formed by a pair of (embedded) permanent magnets (103), angularly spaced-apart by inter-magnet segments (106). The rotor pole pieces (107) include a series of evenly-spaced slots (109) and a central void (108). The slots (109) are of various lengths to direct the flux from the magnets (103) into the air gap (121) at a desired angle normal to the rotor surface. The slots 109 may be varied in width and angle to achieve the desired lowest waveform distortion under load and the highest air gap flux. The slots (109) also contribute to changing the saliency of the rotor.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: October 4, 2016
    Assignee: RADIAL FLUX LABORATORIES PTY LTD
    Inventor: Paul Evan Lillington
  • Patent number: 9391499
    Abstract: Provided are an amorphous split core stator, which maximizes an opposing area between a plurality of split cores and magnets, increases a fill factor of coils, and which is molded by using amorphous metallic powder to thereby minimize an eddy current loss (or a core loss), and an axial gap type motor using the same. The axial gap type amorphous split core motor includes: a rotating shaft whose both ends are rotatably supported; first and second annular yokes the center of each of which is combined with the rotating shaft and that are placed at an interval therebetween; first and second rotors having a plurality of magnets that are mounted on the inner surfaces of the first and second yokes with polarities opposite to each other; and a stator having a plurality of split cores that are placed between the first and second rotors and on each of which a coil is wound, in which the split cores are molded by using amorphous metallic powder.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: July 12, 2016
    Assignee: AMOTECH CO., LTD.
    Inventor: Byoung Soo Kim
  • Patent number: 9126487
    Abstract: A hoverboard is described. The hoverboard includes four hover engines each including a motor. The motor rotates an arrangement of magnets to induce eddy currents and generate magnetic lift which causes the hoverboard to hover in the air. The hoverboard can be tilted to propel it in a particular direction. The hover engines can each be coupled to a tilt mechanism which is coupled to a flexible rider platform. When rider platform is flexed via rider induced forces, the hover engines can be tilted individually to provide translational forces.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: September 8, 2015
    Assignee: Arx Pax, LLC
    Inventors: D. Gregory Henderson, Shauna Moran, Mitchell Dougherty, Victor Espinoza, Robert William Melvin, James Janicki, David P Olynick
  • Patent number: 9018821
    Abstract: A stator arrangement for an electromechanical transducer is provided. The stator arrangement includes a base structure, a coil holder, a coil mounted at the coil holder; and a flexible element connecting the base structure to the coil holder flexibly relative to each other. Further, an electromechanical transducer is provided that includes the above-mentioned stator arrangement and a rotor arrangement rotatable relative to the base structure around an axial direction. Still, further, a wind turbine is provided that includes the above-mentioned electromechanical transducer as a generator.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: April 28, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Henrik Stiesdal
  • Patent number: 9006949
    Abstract: A double-stator synchronous motor has a rotor, an inner stator and an outer stator. The rotor has segment-magnetic poles arranged in a ring shape. Magnetic poles formed in the inner stator and the outer stator face to each other in a same circumferential position. Each stator has q (q?2) slots per pole and phase to disperse magnetomodive force. A radially minimum width Wr of each segment magnetic pole is within a range of 1.3q to 2.3q times of a minimum width Wt of outer teeth. A magnetic depth of a magnetic concave section formed in the segment magnetic pole is within a range of not less than an average width Ws of the inner slots. Because this suppresses demagnetization in the permanent magnets caused by stator magnetomotive force, ferrite magnets are used as buried magnets and magnetic-pole central magnets, and suppress the amount of neodymium magnet used in the rotor.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: April 14, 2015
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Keiji Kondou
  • Patent number: 8994319
    Abstract: An electric motor includes a magnet rotor which is placed with an air gap interposed between it and a stator and has a magnetic pole portion formed from a plastic magnet which swells by hydrogen bonds, an inverter circuit, a DC-voltage conversion portion, a driving logic control portion, a supply current value control portion, a current value designation portion, a reference current value designation portion, and a correlation designation portion, wherein the correlation designation portion determines an average current value by changing the average current value linearly or non-linearly with respect to a reference current value, and the magnetic pole portion absorbs moisture to swell, thereby making the air gap smaller, at higher humidity than a reference humidity.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: March 31, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Masayuki Takada
  • Publication number: 20150069875
    Abstract: A vernier machine includes a rotor, permanent magnets mounted as spokes in pole pairs within the rotor, a first stator, a second stator, a first stator winding wound about the first stator to form a number of poles between a first set of terminals, and a second stator winding wound about the second stator to form the number of poles between a second set of terminals. The first stator and the second stator each include slots and teeth. The first stator and the second stator are mounted on opposite sides of the rotor with each separated by an air gap. The teeth of the first stator are offset from the teeth of the second stator by a half slot pitch relative to the rotor. A number of the pole pairs of the rotor is greater than the number of poles of the first stator winding.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 12, 2015
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Thomas A. Lipo, Byungtaek Kim
  • Patent number: 8941279
    Abstract: There is provided an axial gap type generator. The axial gap type generator includes: a stator core fixed to a crank case of an engine; a rotor yoke fixed to a crankshaft of the engine and opposing the stator core across spacing in an axial direction of the crankshaft; a first planar section provided in the crankshaft and formed to have a planar shape that is perpendicular to a rotation center axis; a second planar section provided at a base, at which the rotor yoke is mounted on the crankshaft, and disposed opposing the first planar section; and a shim clamped between the first planar section and the second planar section.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kazuya Numaguchi, Hiroyuki Hisada
  • Patent number: 8912699
    Abstract: A field gradient motor with a stator housing and first and second stator disks fixed to the stator housing for turning B-field flux lines 90 degrees toward a motor air gap of the field gradient motor. A shaft is rotatably retained by the housing, and a rotor has a hole and keyway for producing a nonferrous hole through the shaft. A plurality of tangentially magnetized triangular magnets are fixed to the rotor. In operation, the stator housing, the stator disks, the rotor, the permanent magnets, and the shaft cooperate with the coil produce an electromagnetic action of the motor. The stator housing can be an iron ring, and the first and second stator disks and the rotor can be steel.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: December 16, 2014
    Inventor: Dennis R. Kuntz
  • Publication number: 20140361653
    Abstract: An electrical machine includes a rotor comprising a rotor core and a plurality of permanent magnets embedded radially within the rotor core to form a plurality of rotor poles. The electrical machine further includes a stator comprising a stator core disposed concentrically outside the rotor and including a plurality of stator teeth defining a plurality of stator slots there between. An arithmetic sum or difference of twice the number of stator teeth and the number of the stator poles equals the number of rotor poles.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Inventors: Patrick Lee Jansen, Ronghai Qu
  • Publication number: 20140339943
    Abstract: An energy harvester for harvesting energy from a rotating machine having a rotatable machine shaft includes a non-magnetic housing, a harvester shaft, a rotor, and a plurality of electrically isolated stators. The housing is adapted to couple to the rotating machine. The harvester shaft is disposed within the housing and is adapted to couple to and rotate with the machine shaft or in some cases becomes the rotating shaft of the machine. The rotor is disposed within the housing and is coupled to and surrounds at least a portion of the harvester shaft. The rotor comprises an N-pole permanent magnet. The plurality of stators are disposed within and coupled to the housing. Each stator surrounds the rotor and is spaced apart therefrom by an air gap. Each stator also has a set of windings wound thereon. Different numbers of stators could be operating together, whereas other stators are disconnected to extend the rotational speed range.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 20, 2014
    Applicant: Honeywell International Inc.
    Inventors: Andy Peczalski, Todd Hanson
  • Patent number: 8872395
    Abstract: A single phase, rotary electromagnetic actuator comprising first and second stator assemblies, located in oppositely facing spaced apart positions along a common central axis, permits a magnetized disc magnet rotor to rotate about the common axis free of any magnetic attractive forces normally tending to move the disc magnet longitudinally along the axis, or alternatively to be located in a position to create a desired longitudinal attractive force. The entire assembly is maintained in operative positions by a circular belt which provides an inward facing lip on each side of which the stator assemblies are seated and which determines the magnetic airgap spacing for the disc. The invention may be implemented as a servo-actuator by the inclusion of an angular position sensor that uses the actuator rotor as the magnetic field emitter, and a receiver for the magnetic field and its contacts, located in the belt lip.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: October 28, 2014
    Assignee: Fraen Mechatronics, LLC
    Inventor: Jamal Tbatou
  • Patent number: 8760250
    Abstract: A magnetic system and related method for generating energy is described. Multiple embodiments are described having different shapes, alternative designs to receive different driving forces, varied magnetic structures, and so forth. In an example implementation, a magnetic structure may include on a single side multiple magnetic sources having different magnetic polarities. Other description herein may be directed to magnetizer printing, adaptable/adjustable correlated magnet devices, entertainment devices having correlated magnet technology, and so forth. Furthermore, description of additional magnet-related technology and example implementations thereof is included herein.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: June 24, 2014
    Assignee: Correlated Magnetics Rsearch, LLC.
    Inventors: Larry W. Fullerton, Mark D. Roberts, James L. Richards
  • Patent number: 8729761
    Abstract: A motor with an axial air gap includes a base, a rotor and a coil unit. The base has a shaft-coupling portion. The rotor has a body coupled with a permanent magnet and a shaft. The permanent magnet has inner and outer circumferential faces, and the inner and outer circumferential faces are respectively projected onto the base as inner and outer circles. The shaft is coupled with the shaft-coupling portion. The coil unit is mounted on the base and has one or more coils. The permanent magnet and the coil unit face each other. At least one coil has a periphery intersecting with the inner and outer circles. The permanent magnet has a first radial length between the inner and outer circumferential faces. At least one coil has a second radial length. The first radial length is 10% to 90% of the second radial length.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: May 20, 2014
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Duo-Nian Shan, Yuan-Jie Zheng
  • Patent number: 8638016
    Abstract: An electromagnetic structure comprises a rotor assembly having at least one circular magnetic structure. The structure has opposing first and second surfaces that extend around a peripheral boundary region. A plurality of emission regions are disposed along said peripheral boundary region, with each emission region presenting poles having opposite polarities of a first polarity and a second polarity on the opposing first and second surfaces of the circular magnetic structure. Adjacent emission regions have alternating pole orientations such that each emission source having the first polarity is between two emission sources having the second polarity and each emission source having the second polarity is between two emission sources having the first polarity. A rotational element rotates the at least one circular magnetic structure about a rotation axis that is perpendicular to the opposing first and second surfaces.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: January 28, 2014
    Assignee: Correlated Magnetics Research, LLC
    Inventors: Larry W. Fullerton, Mark D. Roberts
  • Patent number: 8604739
    Abstract: A controller for an axial gap-type motor (3) comprises a rotor (11) having a permanent magnet and a first stator (12a) and a second stator (12b) opposed to each other with the rotor (11) interposed therebetween in the axial direction of revolution of the rotor (11). The controller further includes an electrification control portion which supplies a torque current (Iq) for generating a magnetic field to revolve the rotor (11) to an armature winding (13a) of the first stator (12a) and supplies a field current (+Id) for reinforcing the magnetic flux by the permanent magnet of the rotor (11) or a field current (?Id) for weakening the magnetic flux to an armature winding (13b) of the second stator (12b). Consequently, the controllable range of the motor is increased and the axial gap-type motor can be operated at higher velocity and higher torque.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: December 10, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventor: Hirofumi Atarashi
  • Publication number: 20130257213
    Abstract: A field gradient motor with a stator housing and first and second stator disks fixed to the stator housing for turning B-field flux lines 90 degrees toward a motor air gap of the field gradient motor. A shaft is rotatably retained by the housing, and a rotor has a hole and keyway for producing a nonferrous hole through the shaft. A plurality of tangentially magnetized triangular magnets are fixed to the rotor. In operation, the stator housing, the stator disks, the rotor, the permanent magnets, and the shaft cooperate with the coil produce an electromagnetic action of the motor. The stator housing can be an iron ring, and the first and second stator disks and the rotor can be steel.
    Type: Application
    Filed: September 26, 2012
    Publication date: October 3, 2013
    Inventor: Dennis R. Kuntz
  • Patent number: 8505674
    Abstract: A steering drive for a motor vehicle comprising a steering wheel, a steering column, on which the steering wheel is disposed, a connecting rod, which interacts with the steering column to deflect the wheels of the motor vehicle, an electric motor, which is provided for boosting the steering thrust, as well as a belt drive, the electric motor interacting with the connecting rod via the belt drive. Said electric motor comprises a stator having twelve stator teeth as well as a rotor having ten rotor poles, the rotor poles being spaced apart from each other by an air gap and embodied as sinus poles.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 13, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Achim Neubauer, Michael Pesch
  • Publication number: 20130127284
    Abstract: An aircraft includes a propeller and an electric motor which is constructed in the form of a drive for the propeller. The electric motor includes at least two air gaps that can be used for cooling. The air gaps define an axis of symmetry which corresponds to an axis of rotation of the propeller.
    Type: Application
    Filed: July 26, 2011
    Publication date: May 23, 2013
    Applicant: Siemens Aktiengeselschaft
    Inventors: Jens Hamann, Wolfgang Wolter
  • Patent number: 8436507
    Abstract: An adjustable axial-flux disc motor, that is used in a flat space formed at a side or at the center of a wheel center for driving the wheel to rotate. The motor is activated to perform a rotation movement by the interactions of an electromagnetic field formed from the passing of an electric current through the armatures of its stator and a magnetic field resulting from the permanent magnet of its rotator. Moreover, there is a circular air gap sandwiched between the stator base and the rotator base, and the permanent magnet is further surrounded by coils. By adjusting the excitation current of the coils, the magnetic flux intensity can be modulated accordingly, and as the air gap magnetic flux is varied with the relative positioning of the stator and the rotator, the output characteristic of the motor will be varied accordingly.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: May 7, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Shih-Hsiang Chien, Yee-Pien Yang, Shih-Hsin Hsu
  • Publication number: 20130093278
    Abstract: A rotational kinetic energy output device comprises a housing component, a rotational component and a magnetism generating component. The rotational component includes a rotational body pivotally connected to the housing component, and the rotational body has at least one magnetic element. The magnetism generating component includes a plurality of magnetizers and coils wound on the magnetizers, the magnetizers are disposed in the housing component and surround the rotational body. Each of the magnetizers has a first magnetic arm and a second magnetic arm extended respectively toward the rotational body, and the rotational body is disposed between the first magnetic arm and the second magnetic arm. Thereby, the rotational kinetic energy output device allows a force to be balancedly exerted on the rotational body and a thin shape is also achieved.
    Type: Application
    Filed: May 31, 2012
    Publication date: April 18, 2013
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Wen-Yang Peng, Jung-Kang Peng, Chau-Shin Jang
  • Publication number: 20130009508
    Abstract: Disclosed is a brushless motor (1A) which is an axial gap type brushless motor (1A) wherein stators (3A, 4A) comprising a coil (41) and a rotor (2) comprising a permanent magnet (23) are arranged with a gap therebetween in the axial direction. The coil (41) is a band-like wire which is spirally wound such that the width direction of the band-like wire generally coincides with the direction of the magnetic flux that is generated by the permanent magnet (23) of the rotor (2). Consequently, the axial gap type brushless motor (1A) having the above-described structure can be further reduced in eddy current loss in comparison to conventional brushless motors.
    Type: Application
    Filed: December 6, 2010
    Publication date: January 10, 2013
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Hiroyuki Takamatsu, Koji Inoue, Kenichi Inoue, Takashi Hase, Osamu Ozaki, Chikara Ichihara, Masakatsu Maruyama, Yasushi Maeda, Hiroyuki Mitani
  • Publication number: 20120326541
    Abstract: This invention presents 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. As a regenerative device, the motor may also act as a part-time or full-time electrical generator. There is provided a motor composed of a stator and a rotor. The stator has an array of coils arranged therein. The rotor has an array of magnets arranged therein. Each of the coils includes a first winding of wire wrapped around a core, and the wire has a non-circular cross-section. The wire can be a flattened wire.
    Type: Application
    Filed: August 31, 2012
    Publication date: December 27, 2012
    Applicant: MILLENNIAL RESEARCH CORPORATION
    Inventors: Denis L. Palmer, Robert A. Palmer, JR., Damian Riddoch, Edward Butler, Charles Palmer
  • 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
  • Publication number: 20120262022
    Abstract: The problem is to provide an axial gap motor using non-rare-earth magnets, as an axial gap motor capable of suppressing reduction in magnet torque and increasing reluctance torque.
    Type: Application
    Filed: October 12, 2010
    Publication date: October 18, 2012
    Applicant: National University Corporation Hokkaido University
    Inventors: Masatsugu Takemoto, Satoshi Ogasawara
  • Patent number: 8278794
    Abstract: The rotor 11 of an axial gap type motor 10 is provided with a plurality of main magnets 41 respectively magnetized in an axial direction of a rotational axis and disposed at predetermined intervals in a peripheral direction, a plurality of yokes 42 structured by a laminated member 71 produced by winding a tape-shaped electromagnetic steel plate 60 and respectively disposed on both sides of the main magnets 41 in the axial direction, and a rotor frame 30 made of a die-cast alloy and including a plurality of ribs 31 respectively interposed between the main magnets 41 adjoining each other in the peripheral direction and extending in the radial direction, and an inner cylindrical portion 32 and an outer cylindrical portion 33 respectively formed on the radially inner side of the ribs 31 and on the radially outer side of the ribs 31.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: October 2, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Satoshi Ishikawa, Keiichi Yamamoto, 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: 8222789
    Abstract: A brushless D.C. disk motor has one or more disk rotor assemblies and pairs of stator assemblies for each rotor assembly. Each disk rotor assembly has a disk and a plurality of permanent magnets distributed along two or more circular paths in the disk inboard of the peripheral edge of the rotor. Each stator assembly has a plurality of pole pieces and coils distributed along a mounting plate in corresponding circular paths. The disk is rotatably mounted to a support member; while the stator sub-assemblies are fixed to the support member. The coils are selectively activated by commutated power control signals generated in response to a vehicle condition parameter, such as vehicle speed or disk motor load, to optimize power drain from the source of electrical power in accordance with the value of the vehicle condition parameter. The stator assembly pole pieces are movably mounted on the stator mounting plate to improve motor efficiency.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: July 17, 2012
    Assignee: Silicon Valley Micro M Corporation
    Inventors: Shengbo Zhu, Su Shiong Huang
  • Patent number: 8222792
    Abstract: A generator or motor apparatus having a stator formed of a plurality of pairs of parallel stator segments is provided The pairs of parallel segments are connected together to form a channel in which an annular rotor moves The annular rotor also comprises a plurality of detachable segments connected together to form an annular tram operable to move through said channel Each stator segment comprises a stator winding set and each rotor segment comprises a magnet dimensioned to fit between the parallel spaced apart stator segments The apparatus may include a support structure, the rotor segments being slidably coupled to the support structure and the stator segments being attached to the support structure The apparatus may be a rim generator, wind turbine generator or other electrical machine The stator winding set includes a stator winding, and may include other electrical or electronic components, including possibly a power factor capacitor, direct current filtering capacitor, supercapacitor, and one or more di
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: July 17, 2012
    Assignee: Clean Current Limited Partnership
    Inventors: Mihai C. Platon, Virgil F. Young
  • Publication number: 20120104880
    Abstract: An axial motor includes a rotor arranged between a pair of stators with coils. In the rotor, a plurality of permanent magnets sandwiched between pairs of first magnetic materials and a plurality of second magnetic materials are alternately arranged in a rotation direction while gaps are provided therebetween. Since the permanent magnets are sandwiched by the first magnetic materials in the thus constructed axial motor, a field-weakening control can be performed. Since the second magnetic materials are provided, a reluctance torque can be generated. Further, since the gaps are provided, more magnetic fluxes generated from the permanent magnets can be caused to flow toward the coils. Therefore, the thus constructed axial motor can achieve a higher output, higher torque, higher efficiency, and miniaturization.
    Type: Application
    Filed: June 17, 2010
    Publication date: May 3, 2012
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO, NATIL. UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Masatsugu Takemoto, Hiroyuki Mitani, Hirofumi Hojo, Koji Inoue, Osamu Ozaki
  • Publication number: 20120091847
    Abstract: An electromagnetic structure comprises a rotor assembly having at least one circular magnetic structure. The structure has opposing first and second surfaces that extend around a peripheral boundary region. A plurality of emission regions are disposed along said peripheral boundary region, with each emission region presenting poles having opposite polarities of a first polarity and a second polarity on the opposing first and second surfaces of the circular magnetic structure. Adjacent emission regions have alternating pole orientations such that each emission source having the first polarity is between two emission sources having the second polarity and each emission source having the second polarity is between two emission sources having the first polarity. A rotational element rotates the at least one circular magnetic structure about a rotation axis that is perpendicular to the opposing first and second surfaces.
    Type: Application
    Filed: September 19, 2011
    Publication date: April 19, 2012
    Applicant: Correlated Magnetics Research, LLC
    Inventors: Larry W. Fullerton, Mark D. Roberts
  • 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: 8102090
    Abstract: A first member (40a) has a magnet assembly (20) that includes a plurality of permanent magnets (10) held with their homopoles contacting one another. A second member (50a) includes magnet coils (30), and is designed to be changeable in position relative to the first member. The magnet assembly (20) generates the strongest magnetic field in a magnetic field direction lying in the homopolar contact plane at which the homopoles contact one another, the magnetic field direction being oriented outward from the magnet assembly (20) along the magnetic field direction.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: January 24, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Kesatoshi Takeuchi
  • Publication number: 20110273034
    Abstract: A magnet pole portion 31 is made up of an integral magnet 44 into which are integrated a main permanent magnet piece 41 which is magnetized in the direction of a rotational axis, a pair of auxiliary permanent magnet pieces 42, 42 which are disposed at circumferential sides on one side of the main permanent magnet piece 41 with respect to the direction of the rotational axis, which are each magnetized in the direction of the rotational axis and a direction which is at right angles to a radial direction and on which magnetic poles face each other which are the same as a magnetic pole on the one side of the main permanent magnet piece 41 with respect to the direction of the rotational axis, and a pair of auxiliary magnet pieces 43, 43 which are disposed at circumferential sides on the other side of the main permanent magnet piece 41 with respect to the direction of the rotational axis, which are each magnetized in the direction of the rotational axis and a direction which is at right angles to a radial direction
    Type: Application
    Filed: November 20, 2009
    Publication date: November 10, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Keiichi Yamamoto
  • Publication number: 20110260567
    Abstract: The motor contains a rotary disc, a number of magnets, a first stationary disc, a second stationary disc, a number of electromagnets, a casing member, and an electromagnetic circuit connected to the electromagnets. The magnets are uniformly distributed and embedded inside the rotary disc. The electromagnets are fixedly positioned on inner sides of the stationary discs facing the magnets. An axle runs through the rotary disc and is supported by the casing member by bearings. When electricity is applied, electrical current flows to an electromagnet, and a magnetic pole is thereby produced and interaction with the magnetic field of the magnet is activated. The rotary disc is turned by the magnetic expel or attraction between the electromagnets and the magnets of the rotary disc. As the rotary disc is turned, the axle is spun as well to deliver power.
    Type: Application
    Filed: June 24, 2010
    Publication date: October 27, 2011
    Inventor: CHUAN-SHENG CHEN
  • Patent number: 8040008
    Abstract: The axial gap motor includes the rotor having: a rotor frame including a plurality of ribs extending in a radial direction, an inner circumferential side annular shaft, and an outer circumferential side annular rim, which are integrally coupled to each other through the ribs; the shaft has shaft side rib mounting holes through which the ribs are mounted, the rim has rim side rib mounting holes through which the ribs are mounted, the ribs have radial inner ends mounted and fixed into the shaft side rib mounting holes and radial outer ends mounted and fixed into the rim side rib mounting holes, and in the rotor frame, the main magnets and the sub magnets are alternately disposed in the circumferential direction, between the shaft and the rim.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: October 18, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tamotsu Kawamura, Keiichi Yamamoto, Hirofumi Atarashi, Shoei Abe, Shigeru Tajima
  • Patent number: 8030816
    Abstract: A rotor (11) is provided with: a main permanent magnet mounting layer (21) having a plurality of main permanent magnets (21a) mounted thereon; a first sub permanent magnet mounting layer (22) having a plurality of first sub permanent magnets (22a) mounted thereon; a second sub permanent magnet mounting layer (23) having a plurality of second sub permanent magnets (23a) mounted thereon; and a phase change mechanism capable, by turning at least either one of the first sub permanent magnet mounting layer (22) and the second permanent magnet mounting layer (23), and the main permanent magnet mounting layer (21) about the rotational axis, of changing the relative phase between the first sub permanent magnet mounting layer (22) and the second permanent magnet mounting layer (23), and the main permanent magnet mounting layer (21).
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: October 4, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hirofumi Atarashi, Keiichi Yamamoto, Shoei Abe, Shigeru Tajima
  • Patent number: 7999501
    Abstract: A motor controller (2) for an axial-gap motor (1), which has a rotor (3), two stators (4, 5) disposed on both sides of the rotor (3) in the axial direction, and armature windings (6, 7) wrapped around the stators (4, 5), includes a field current controller (43, 44) which adjusts the field current in the current supplied to the armature windings (6, 7) of at least one of the stators (4, 5) so as to restrain a thrust force acting on the rotor (3) in the axial direction of the rotor (3). This restrains the thrust force acting on the rotor (3) of the axial-gap motor (1).
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: August 16, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventor: Hirofumi Atarashi
  • Patent number: 7986069
    Abstract: A first member (40a) has a magnet assembly (20) that includes a plurality of permanent magnets (10) held with their homopoles contacting one another. A second member (50a) includes magnet coils (30), and is designed to be changeable in position relative to the first member. The magnet assembly (20) generates the strongest magnetic field in a magnetic field direction lying in the homopolar contact plane at which the homopoles contact one another, the magnetic field direction being oriented outward from the magnet assembly (20) along the magnetic field direction.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: July 26, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Kesatoshi Takeuchi