Magnetic Motors Patents (Class 310/46)
  • Publication number: 20120139465
    Abstract: A reluctance machine is disclosed. The reluctance machine includes a stationary member including a housing, a plurality of windings disposed in the housing, a plurality of electrical connections each electrical connection coupled to a corresponding winding of the plurality of windings, and a plurality of teeth coupled to the housing, a rotating member having a center including a mechanical coupling member formed about the center, and a plurality of outwardly protruding poles centrally located within the stationary member each outwardly protruding pole having a continuous outer surface adjacent to at least one tooth of the plurality of teeth, wherein each outer surface of each outwardly protruding pole having a first portion being a first distance away from the center and a second portion being a second distance away from the center.
    Type: Application
    Filed: November 22, 2011
    Publication date: June 7, 2012
    Applicant: PURDUE RESEARCH FOUNDATION
    Inventors: Cahya Harianto, Scott Sudhoff
  • Publication number: 20120139464
    Abstract: A synchronous reluctance motor comprises a stator (2) having at least one pair of poles and a plurality (ns) of grooves (3) for each pair of poles, a transverse-laminated rotor (5) with a plurality of disk-line sheet metal members (7, 7?, 7?, . . . ) of predetermined outside diameter (D), each having a plurality of adjacent slots (8, 8?, . . . ; 9, 9?, . . . ; 10, 10?, . . . ; 11, 11?, . . . ) and a central through hole (12) of predetermined inside diameter (d), each slot (8, 8?, . . . ; 9, 9?, . . . ; 10, 10?, . . . ; 11, 11?, . . . ) having a substantially curved elongate shape, symmetrical with respect to a radius, with end portions closed at the edge (13) of a corresponding sheet element (7, 7?, 7?, . . . ) to define corresponding ribs (14, 14?, 14?), which are adapted to be magnetically saturated to be equivalent to rotor slots. At least one first portion of the sheet elements (7, 7?, 7?, . . . ) has a ratio of the inside diameter (d) to the outside diameter (D) equal to or greater than 0.
    Type: Application
    Filed: May 17, 2010
    Publication date: June 7, 2012
    Applicant: REEL S.R.L.
    Inventors: Davor Filipeti, Boris Karuzic, Ezio Bertotto
  • Patent number: 8183722
    Abstract: An accessory drive system which is capable of preventing the driving efficiency thereof from being lowered and achieving simplified construction, and reduction of the size and manufacturing costs. The system has a rotating machine including a first rotor, a second rotor, and a stator. The first rotor is formed by magnetic poles circumferentially arranged, with each two adjacent ones having different polarities. The stator has an armature row for generating a rotating magnetic pole that circumferentially rotates, between the armature and magnetic pole rows. The second rotor is formed by soft magnetic material elements circumferentially arranged with space, and disposed between the magnetic pole and armature rows. A ratio between the number of the armature magnetic poles, that of the magnetic poles, and that of the soft magnetic material elements is set to 1:m:(1+m)/2(m?1.0).
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: May 22, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Shigemitsu Akutsu, Satoyoshi Oya, Kota Kasaoka, Noriyuki Abe
  • Publication number: 20120104982
    Abstract: An electrical machine rotor includes a flux-conducting portion and a flux-inhibiting portion. The flux-conducting portion is conducive to conveying an electromagnetic flux and has a plurality of salient rotor poles and a portion of back material. The flux-inhibiting portion is less conducive to conveying an electromagnetic flux than the flux-conducting portion and is disposed entirely outside the boundaries of the rotor poles.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 3, 2012
    Inventor: Krishnan RAMU
  • Patent number: 8169109
    Abstract: A switched reluctance machine has an array of poles attached to a stationary holding member to form a stator. The stator has no back-iron. The machine has two arrays of rotor poles, positioned on either side of the stator poles, and circumferentially aligned with each other. When a pair of rotor poles is aligned with a stator pole, a small airgap is formed at each end of the stator pole, across which flux can be driven to produce torque in a rotary arrangement or force in a linear arrangement. When the poles are in the unaligned position, the phase inductance is very low.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: May 1, 2012
    Assignee: Nidec SR Drives Ltd.
    Inventors: Paul Andrew Sykes, Phillip George Dickinson
  • Publication number: 20120091940
    Abstract: An AC motor is provided. In the AC motor, there are M pieces (M is an integer of 3 or more) of stator pole groups SPG are arranged in a rotor axis direction, where each of the stator poles groups is composed of a plurality of stator poles which are for the same phase and arranged in a circumferential direction of the motor. Between the stator pole groups SPG, “M?1” pieces of annular windings WR are arranged which allow one-way current to flow therethrough. The windings WR are arranged such that the directions of current passing therethrough are reversed in turn in the rotor axis direction. The stator pole groups SPG are excited to generate magnetic fluxes ?G directed in a one way. The excited directions of the magnetic fluxes ?G are reversed in turn in the rotor axis direction.
    Type: Application
    Filed: May 11, 2011
    Publication date: April 19, 2012
    Applicant: DENSO CORPORATION
    Inventors: Masayuki NASHIKI, Tomokazu Ishikawa
  • Publication number: 20120086289
    Abstract: A rotor is disclosed for a synchronous reluctance machine which includes an axis, which is supported by bearings to rotate inside a stator, and to which axis a rotor frame has been attached. The frame can be made of magnetically non-conductive material, having arranged magnetically conductive bar-shaped objects which extend through the rotor frame from the outer surface of the magnetic pole of the rotor to the outer surface of the pole. The whole length of each bar-shaped object inside the rotor frame can be surrounded by non-magnetic material.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 12, 2012
    Applicant: ABB Oy
    Inventor: Jere KOLEHMAINEN
  • Publication number: 20120086288
    Abstract: An electric rotating machine includes a stator, a rotor, and a plurality of magnetic shields. The stator includes a stator core and a stator coil wound on the stator core. The stator core has a plurality of stator teeth arranged in the circumferential direction of the stator core. The rotor includes a rotor core that has a plurality of magnetic salient poles formed therein. The magnetic salient poles face the stator teeth through an air gap formed therebetween. Each of the magnetic shields is provided, either on the forward side of a corresponding one of the stator teeth or on the backward side of a corresponding one of the magnetic salient poles with respect to the rotational direction of the rotor, to create a magnetic flux which suppresses generation of a negative electromagnetic force that hinders rotation of the rotor.
    Type: Application
    Filed: October 7, 2011
    Publication date: April 12, 2012
    Applicant: DENSO CORPORATION
    Inventors: Asuka TANAKA, Shin Kusase, Makoto Taniguchi
  • Patent number: 8151745
    Abstract: A converter converts mechanical energy of a piston to and from electrical energy during each piston cycle.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: April 10, 2012
    Assignee: The Invention Science Fund I, LLC
    Inventors: Roderick A. Hyde, William H. Gates, III, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Clarence T. Tegreene, Thomas A. Weaver, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
  • Publication number: 20120068558
    Abstract: Disclosed is a hybrid pole bearingless switched reluctance motor (BLSRM). The BLSRM includes a stator provided with windings, a rotor rotating about an axis when current is conducted to the windings. The rotor includes a plurality of rotor poles extending radially outward, and the stator includes a plurality of stator poles extending radially inward. The windings include suspending windings to generate radial force for the rotor and torque windings to generate torque. The suspending windings are mutually separated from the torque windings. Through the use of the hybrid pole BLSRM, a stator pole generating the radial force can be controlled independently from the stator pole generating the torque by separately arranging the stator pole generating the radial force and the stator pole generating torque based on the analysis of radial force and torque characteristics according to the position of the stator poles.
    Type: Application
    Filed: July 14, 2009
    Publication date: March 22, 2012
    Applicant: Kyungsung University Industry Cooperation Foundation
    Inventors: Jin Woo Ahn, Dong Hee Lee, Huijun Wang
  • Publication number: 20120062053
    Abstract: A rotor for a synchronous reluctance machine wherein a torque ripple behaviour of the machine is optimized by altering the geometry of insulating barriers of the rotor. A q-axis pitch angle is used as a design variable instead of setting its value equal to the rest of the rotor slot pitches or binding its value to the stator slot pitch. The resulting rotor has a non-regular slot pitch across the q-axis and substantially regular slot pitch otherwise. Synchronous reluctance machines that employ rotor discs and rotor assemblies in accordance with the present invention may exhibit low torque ripple without sacrificing high torque values.
    Type: Application
    Filed: September 12, 2011
    Publication date: March 15, 2012
    Inventor: Reza Rajabi Moghaddam
  • Publication number: 20120025636
    Abstract: A high temperature motor has a stator with poles formed by wire windings, and a rotor with magnetic poles on a rotor shaft positioned coaxially within the stator. The stator and rotor are built up from stacks of magnetic-alloy laminations. The stator windings are made of high temperature magnet wire insulated with a vitreous enamel film, and the wire windings are bonded together with ceramic binder. A thin-walled cylinder is positioned coaxially between the rotor and the stator to prevent debris from the stator windings from reaching the rotor. The stator windings are wound on wire spools made of ceramic, thereby avoiding need for mica insulation and epoxy/adhesive. The stator and rotor are encased in a stator housing with rear and front end caps, and rear and front bearings for the rotor shaft are mounted on external sides of the end caps to keep debris from the motor migrating into the bearings' races.
    Type: Application
    Filed: July 26, 2011
    Publication date: February 2, 2012
    Inventor: ROOPNARINE
  • Publication number: 20120025637
    Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of extended magnets, overhung rotors, and/or stator tooth overlap. Extended magnets may reduce flux leakage between adjacent flux concentrators. Overhung rotors may reduce flux leakage, and may also facilitate voltage balancing in polyphase devices. Stator tooth overlap may reduce hysteresis losses, for example losses in flux concentrating portions of an electrical machine.
    Type: Application
    Filed: October 12, 2011
    Publication date: February 2, 2012
    Applicant: MOTOR EXCELLENCE LLC
    Inventors: David G. Calley, Daniel S. Cole, John M. Dyer, Thomas F. Janecek
  • Publication number: 20120001501
    Abstract: Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain rotors for use in transverse and commutated flux machines may be formed to facilitate a “many to many” flux switch configuration between flux concentrating stator portions having opposite polarities. Other rotors may be formed from a first material, and contain flux switches formed from a second material. Yet other rotors may be machined, pressed, stamped, folded, and/or otherwise mechanically formed. Via use of such rotors, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.
    Type: Application
    Filed: September 12, 2011
    Publication date: January 5, 2012
    Applicant: MOTOR EXCELLENCE, LLC
    Inventors: David G. Calley, Thomas F. Janecek
  • Publication number: 20110316366
    Abstract: A switched reluctance apparatus and method of operating the same. The apparatus has an inner stator having a plurality of poles, a rotor disposed radially outward of the inner stator and having a plurality of segments serving as poles, and an outer stator disposed radially outward of the rotor and having a plurality of poles. A respective winding is disposed between every pair of adjacent poles of either stator. The apparatus operates with a plurality of separately excitable phases, a given phase being excited by energizing the windings corresponding to the given phase. Excitation of a given phase causes induction of magnetic fluxes traversing a region substantially confined to the region of the stators and rotor segments corresponding to the given phase, and causes a substantial amount of flux to enter rotor segments not in the radial direction but perpendicular to the radial direction.
    Type: Application
    Filed: June 27, 2011
    Publication date: December 29, 2011
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Mohammadali Abbasian, Mehdi Moallem, Babak Fahimi
  • Publication number: 20110309695
    Abstract: A cooling system for an electric motor is equipped with cooling tubes for transporting a cooling fluid, the tubes are installed within the slots along with the motor winding. The cooling tubes make direct contact with the windings of the motor through a thermal conductive coating that is also electrically insulating. In one embodiment of the invention the cooling tubes are made from a hollow copper tube that is coated with Kapton® (polyimide).
    Type: Application
    Filed: June 20, 2011
    Publication date: December 22, 2011
    Inventor: STEVEN R. HUARD
  • Publication number: 20110304224
    Abstract: A power system for a vehicle may comprise an electric machine attached to an engine of the vehicle. The electric machine may comprise only one stator core; a stator main winding wound on the one stator core; a stator exciter winding wound on the one stator core. The stator main winding and the stator exciter winding may be magnetically independent from one another even though magnetic-field-isolation material is not interposed between the stator main winding and the stator exciter winding.
    Type: Application
    Filed: July 9, 2010
    Publication date: December 15, 2011
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: CRISTIAN ANGHEL, PARSA MIRMOBIN, MING XU
  • Publication number: 20110298312
    Abstract: Electric motors are disclosed with coils which induce a magnetic flux field which by its relationship with ferromagnetic poles provide the motoring force without use of an auxiliary magnetic field. The motors may be employed with fixed or pivotably mounted brushes. Pivotable brushes for electric motor brushes are disclosed.
    Type: Application
    Filed: June 8, 2011
    Publication date: December 8, 2011
    Inventor: Anthony Freakes
  • Publication number: 20110284300
    Abstract: A switched reluctance motor includes an inner stator having a plurality of stator poles with coil windings, the inner stator having a plurality of stator phases, an outer rotor configured to rotate around the inner stator, the outer rotor having a plurality of rotor poles, at least one position sensor configured to detect a position of the outer rotor, and a DC supply configured to sequentially supply current to excite the stator phases.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 24, 2011
    Applicant: THE HONG KONG POLYTECHNIC UNIVERSITY
    Inventors: Ka Wai Eric Cheng, Xiangdang Xue, Chow Norbert Cheung
  • Publication number: 20110273035
    Abstract: Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain exemplary stators for use in transverse and commutated flux machines may be configured with gaps therebetween, for example in order to counteract tolerance stackup. Other exemplary stators may be configured as partial stators having a limited number of magnets and/or flux concentrators thereon. Partial stators may facilitate ease of assembly and/or use with various rotors. Additionally, exemplary floating stators can allow a transverse and/or commutated flux machine to utilize an air gap independent of the diameter of a rotor. Via use of such exemplary stators, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.
    Type: Application
    Filed: July 21, 2011
    Publication date: November 10, 2011
    Applicant: MOTOR EXCELLENCE, LLC
    Inventors: David G. Calley, Thomas F. Janecek
  • Publication number: 20110266893
    Abstract: A switched reluctance machine is provided. The switched reluctance machine has a rotor including a rotor core, where the rotor core includes multiple laminated sheets, each of the laminated sheets including multiple ferromagnetic regions and multiple non-ferromagnetic regions formed of a single material. The ferromagnetic and the non-ferromagnetic regions are alternately arranged such that the ferromagnetic regions form multiple rotor teeth and the non-ferromagnetic regions define multiple non-ferromagnetic gaps between the rotor teeth.
    Type: Application
    Filed: June 14, 2010
    Publication date: November 3, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Ayman Mohamed Fawzi El-Refaie
  • Patent number: 8049376
    Abstract: A rotor for a brushless motor is resistant to degradation in alternative fuels and has desirable magnetic properties. A stator for a brushless DC motor includes coils wound both clockwise and counterclockwise around teeth of a back iron. Pairs of the coils are electrically connected in parallel.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: November 1, 2011
    Assignees: Ford Global Technologies, LLC, Visteon Global Technologies, Inc.
    Inventors: David M. Dokas, Brian J. Cardwell, Harold L. Castle
  • Publication number: 20110259659
    Abstract: Disclosed are single- and poly-phase transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Exemplary devices, including polyphase devices, may variously be configured with an interior rotor and/or an interior stator. Other exemplary devices, including polyphase devices, may be configured in a slim, stacked, and/or nested configuration. Via use of such polyphase configurations, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 27, 2011
    Applicant: MOTOR EXCELLENCE, LLC
    Inventors: David G. Calley, Thomas F. Janecek
  • Publication number: 20110260672
    Abstract: A switched reluctance machine having salient stator and rotor poles. Alternating ones of the stator poles having windings and the others having permanent magnets attached on their pole faces. The alternate stator pole windings are provided with polarities that are suitable for unidirectional and bidirectional current operation of the switched reluctance machine. The alternate poles with permanent magnets in the switched reluctance machines can have also concentric windings placed on them and excited with currents to further augment the flux linkages in the stator poles. The windings on the poles with permanent magnets can be excited from the same source as the windings on the poles without permanent magnets to enhance power output or provide power factor correction.
    Type: Application
    Filed: April 25, 2011
    Publication date: October 27, 2011
    Inventor: Krishnan RAMU
  • Publication number: 20110254389
    Abstract: An actuator includes an upper stator with four upper poles and a lower stator with four lower poles aligned with the four upper poles. A permanent magnet is attached to the upper stator and the lower stator. Four moving armatures are positioned at terminal ends of the four upper poles and the four lower poles. Coils are wrapped around the upper stator and the lower stator. A controller selectively applies current to the coils to migrate flux created by the permanent magnet through selective poles of the upper stator and the lower stator and thereby alter the size of air gaps associated with the four moving armatures.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 20, 2011
    Applicant: QM POWER, INC.
    Inventor: Charles J. Flynn
  • Publication number: 20110248581
    Abstract: The present invention relates to a magnetic actuation method according to which a magnetised mobile (4) is directed by means of at least one magnetic element (2, 2a, 2b) placed opposite said magnetised mobile, characterised in that the preferred direction (or easy axis) of magnetisation is made to turn at every point of said element by applying at least one mechanical constraint to said magnetic element(s) (2, 2, 2b), causing anisotropy within said element and thus moving the magnetised mobile in a preferred linear direction or causing the same to rotate.
    Type: Application
    Filed: October 23, 2009
    Publication date: October 13, 2011
    Applicants: Centre National De La Recherche Scientifique, Institit Polytechnique De Grenoble
    Inventors: Daniel O'brien, Jérôme Delamare, Orphée Cugat, Olivier Geoffroy
  • Publication number: 20110234027
    Abstract: A switched reluctance motor includes at least four stator poles and an electrically conductive material around each of the stator poles. The geometric outline, on one side of the stator pole, of at least one of the conductive materials is not rectangular, as viewed from a cross-section of the switched reluctance motor showing each of the stator poles.
    Type: Application
    Filed: March 29, 2011
    Publication date: September 29, 2011
    Inventor: Krishnan RAMU
  • Publication number: 20110210626
    Abstract: The invention relates to a transverse flux motor comprising at least one stator and at least one rotor. Magnetically active elements of the stator are formed in an annular manner and with a U-shaped inner contour on the stator and the rotor is in the form of a disk or a ring. The rotor comprises magnetically active sections consisting of a soft-magnetic or permanent-magnetic material, that are radially oriented in an annular manner towards at least one front surface of the rotor.
    Type: Application
    Filed: October 22, 2009
    Publication date: September 1, 2011
    Applicant: LEANTEC MOTOR GMBH & CO. KG
    Inventor: Michael Schmidt
  • Publication number: 20110169350
    Abstract: The invention provides an active element (20) for an electromagnetic machine, the element comprising an alternating succession in a main direction (X) of portions (21) presenting a first magnetic property and of portions (22) presenting a second magnetic property, wherein the element includes a non-magnetic covering (25) that is thin relative to a thickness of the portions and that extends to cover a substantial fraction of an outside surface of the active element, the covering being secured to at least some of the portions and presenting sufficient strength to form a member for mechanically transmitting the magnetic forces to which the portions are subjected.
    Type: Application
    Filed: June 28, 2007
    Publication date: July 14, 2011
    Applicant: MESSIER-DOWTY SA.
    Inventors: Nicolas Ziegler, Daniel Matt
  • Publication number: 20110163618
    Abstract: This rotating electrical machine includes a stator, a rotor having a plurality of convex portions on its surface that opposes the stator and extending along its direction of rotation, a magnet, and a frame made from magnetic material. The number of poles of the stator is the same as the number of magnetic convex poles of the rotor. The rotor is made from a plurality of plates of magnetic material, superimposed and skewed along the axial direction. A magnetic circuit is set up in the frame so that the magnetic flux of the magnet flows therein from the central portion of the rotor. And the magnet is a permanent magnet shaped as a cylinder, is single-pole magnetized along the radial direction, and is provided between the outer circumferential surface of the stator in the circumferential direction and the inner circumferential surface of the frame in the circumferential direction.
    Type: Application
    Filed: December 29, 2010
    Publication date: July 7, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Hiroshi Kanazawa, Shoichi Kawamata, Shinji Sugimoto
  • Publication number: 20110156505
    Abstract: First to fourth magnetic detection units (22-25) are arranged in opposition to a multipole magnetized surface (21a) of a multipole magnet (21) of a magnetic encoder (17). The first and second magnetic detection units (22, 23) are placed on positions separated from each other by 180 degrees on the periphery of the center of the multipole magnet and output an A-phase signal and a B-phase signal. The third and fourth magnetic detection units (24, 25) are placed on positions separated from each other by nearly 180 degrees on the periphery of the center of the multipole magnet and output an A-phase reverse signal and a B-phase reverse signal. Detection signals of the same phase are synthesized and averaged, and consequently a detection error generated by an outer magnetic flux extending in the diameter direction of the multipole magnet can be removed.
    Type: Application
    Filed: June 20, 2008
    Publication date: June 30, 2011
    Inventors: Kunio Miyashita, Toshiki Maruyama, Tsukasa Koto
  • Patent number: 7969055
    Abstract: The present invention relates to rotary motors in which the rotational motion of the motor is provided by the attractive (or repulsive) forces between a pair of cooperating magnets in response to tilting of the motor axle.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: June 28, 2011
    Assignee: Larry Titus Clean Energy Technologies, LLC
    Inventor: Larry D. Titus
  • Publication number: 20110148225
    Abstract: Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain rotors for use in transverse and commutated flux machines may be formed to facilitate a “many to many” flux switch configuration between flux concentrating stator portions having opposite polarities. Other rotors may be formed from a first material, and contain flux switches formed from a second material. Yet other rotors may be machined, pressed, stamped, folded, and/or otherwise mechanically formed. Via use of such rotors, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.
    Type: Application
    Filed: March 3, 2011
    Publication date: June 23, 2011
    Applicant: MOTOR EXCELLENCE LLC
    Inventors: David G. Calley, Thomas F. Janecek
  • Publication number: 20110089775
    Abstract: A parallel magnetic circuit motor includes a rotor without magnets and a stator with magnets. The rotor, stator and windings are configured to produce unidirectional current and torque with electrically independent phases.
    Type: Application
    Filed: October 19, 2010
    Publication date: April 21, 2011
    Applicant: QM POWER, INC.
    Inventor: Charles J. Flynn
  • Publication number: 20110089774
    Abstract: A transverse flux, switched reluctance motor includes a stator, a rotor mounted for rotation relative to the stator about an axis, and a plurality of phased coils. The stator and rotor are spaced apart from each other by a gap and a first phased coil is positioned to extend at least partially across the gap.
    Type: Application
    Filed: December 23, 2010
    Publication date: April 21, 2011
    Inventor: Dennis A. Kramer
  • Publication number: 20110074232
    Abstract: An electric motor with two or more stator sections, each possessing at least two salient pole projections having power windings, and two or more armature sections on a common shaft. The armature sections are at an angle to each other: e.g. 90 degrees for two armatures, 120 degrees for three armatures. Each armature has a lamination stack or ferrite core. The armature sections form a constant air gap with the field poles, and have an elliptical profile with respect to the output shaft. The armature sections have no electrical windings, or conductors and require no slip rings, rotor coils or permanent magnets. The power windings are energized by pulses of electric current. Said pulses are automatically supplied to the salient pole nearest the longest rotor flux path available, as determined by a shaft position sensor.
    Type: Application
    Filed: June 4, 2009
    Publication date: March 31, 2011
    Applicant: CONVERGENT POWER, INC.
    Inventor: James F. Murray
  • Publication number: 20110070108
    Abstract: In a rotary electric motor a first stator core and a second stator core are disposed coaxially so as to be separated by a predetermined distance axially and such that circumferential positions of teeth are aligned, and a first rotor core and a second rotor core on which salient poles are disposed at a uniform angular pitch circumferentially are fixed coaxially to a rotating shaft so as to be positioned on inner peripheral sides of the first stator core and the second stator core, respectively, and so as to be offset circumferentially by a pitch of half a salient pole from each other. A first permanent magnet that is magnetically oriented such that a direction of magnetization is radially inward is disposed on an outer peripheral surface of a core back of the first stator core, and an outer peripheral surface of the first permanent magnet and the outer peripheral surface of the core back of the second stator core are linked by a frame that is made of a magnetic material.
    Type: Application
    Filed: April 28, 2009
    Publication date: March 24, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideaki Arita, Masaya Inoue, Masahiro Iezawa, Hayato Yoshino, Kazuhiko Baba, Hitoshi Kawaguchi, Toshihiko Miyake
  • Publication number: 20110048821
    Abstract: A reluctance machine includes a stator and a rotor. The stator and rotor have a same number of poles. The rotor is configured to rotate about an axis of rotation. Each stator pole is formed of a primary stator pole and an auxiliary stator pole. The auxiliary stator pole is axially aligned with the primary stator pole in the direction of the axis of rotation. Each rotor pole has a length extending in the direction of the axis of rotation sufficient to at least partially cover the primary stator pole and axially aligned auxiliary stator pole. The primary stator poles are actuated with an alternating magnetic field orientation, and the auxiliary stator poles are also actuated with an alternating magnetic field orientation. The field orientations for the primary and auxiliary stator poles are, however, opposite each other such that a primary stator pole its axially aligned auxiliary stator pole have opposite magnetic field orientations.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 3, 2011
    Applicant: Everette Energy, LLC
    Inventor: Daniel Christopher Dial
  • Publication number: 20110050149
    Abstract: A reluctance machine includes a stator and a rotor. The stator and rotor have a same number of poles. The rotor is configured to rotate about an axis of rotation. Each stator pole is formed of a primary stator pole and an auxiliary stator pole. The auxiliary stator pole is axially aligned with the primary stator pole in the direction of the axis of rotation. Each rotor pole has a length extending in the direction of the axis of rotation sufficient to at least partially cover the primary stator pole and axially aligned auxiliary stator pole. The primary stator poles are actuated with an alternating magnetic field orientation, and the auxiliary stator poles are also actuated with an alternating magnetic field orientation. The field orientations for the primary and auxiliary stator poles are, however, opposite each other such that a primary stator pole its axially aligned auxiliary stator pole have opposite magnetic field orientations.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 3, 2011
    Applicant: Everette Energy, LLC
    Inventor: Daniel Christopher Dial
  • Publication number: 20110006620
    Abstract: A stator 3 is provided with a plurality of magnetic poles 3a on the outer circumference thereof, and is configured from a plurality of layers of plate-shaped members. A rotor 4 is rotatably disposed around the stator. The inner circumferential face of the rotor is provided with a magnet 5. The outer circumferential ends of the magnetic poles of the stator are provided with an extended portion that is bent such that at least one plate-shaped member, including an outermost layer, of the plurality of plate-shaped members is substantially parallel to the magnet. When the inner diameter of a bent portion of a plate-shaped member that is the closest to the magnet of the at least one plate-shaped member constituting the extended portion is taken as R1i, and the thickness of the closest plate-shaped member is taken as T1, R1i<T1 is satisfied. Accordingly, it is possible to improve the driving efficiency of an outer rotor-type motor.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 13, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Hiroaki KAWASAKI, Yuichi YOSHIKAWA, Atsuyoshi KOSHIBA, Koji KADOWAKI, Yasuo KUNISHIGE, Yasuhiro INOUE
  • Publication number: 20100295389
    Abstract: An axial flux switched reluctance motor utilizes one or more rotor discs spaced along a rotor shaft, each rotor disc having a plurality of rotor poles spaced along the periphery thereof. Stator elements are distributed circumferentially about the rotor discs and form pairs of radially extending stator poles for axially straddling the rotor discs. Stator coils as switched on to energize pairs of stator poles for forming an axial and radially inward flux path for rotating the rotor poles for minimizing the flux path before switching off the stator coil. Two or more rotor discs can be rotationally indexed for providing two or more motor phases. In manufacture, rotor discs and circumferentially extending stator coils about the periphery of each rotor disc are fit to a stator housing. Each stator element is then fit radially through the stator housing and secured thereto for straddling the rotor discs.
    Type: Application
    Filed: June 12, 2007
    Publication date: November 25, 2010
    Inventors: Lynn P. Tessier, John P. Doyle, James L. Weber
  • Patent number: 7834495
    Abstract: An electromagnetic engine is disclosed which utilizes a plurality of rotors mounted on a common drive shaft. There are permanent magnets mounted on and near the periphery of the rotors. Electromagnets are mounted external to the rotors but adjacent to the periphery of the rotors. A timing means is provided with each rotor to sense the position of the rotor and energize the electromagnets to a first magnetic polarity when the permanent magnets are a predetermined angular distance from an electromagnet. The energized electromagnets attract the permanent magnets and create rotation of the rotors and drive shaft. When a permanent magnet comes into alignment with an electromagnet the electromagnet is de-energized from its first magnetic polarity and is re-energized to the opposite magnetic polarity. This neutralizes the effects of residual magnetism and repels the permanent magnets to also create rotation of the rotors and drive shaft.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: November 16, 2010
    Inventor: Jack H Mitchell
  • Patent number: 7816820
    Abstract: A compacted magnetic core with a high resistance, which comprises compacted magnetic powder of an iron powder or an alloy powder containing iron as a main ingredient and a layer of a rare earth metal fluoride or an alkaline earth metal fluoride on the surface of the powder, wherein the rare earth metal fluoride or the alkaline earth metal fluoride contains fluorine-depleted crystal lattice at a rate of 10% or less.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: October 19, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Takao Imagawa, Yuichi Satsu, Matahiro Komuro
  • Publication number: 20100231062
    Abstract: A switched reluctance machine has an array of poles attached to a stationary holding member to form a stator. The stator has no back-iron. The machine has two arrays of rotor poles, positioned on either side of the stator poles, and circumferentially aligned with each other. When a pair of rotor poles is aligned with a stator pole, a small airgap is formed at each end of the stator pole, across which flux can be driven to produce torque in a rotary arrangement or force in a linear arrangement. When the poles are in the unaligned position, the phase inductance is very low.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 16, 2010
    Applicant: Switched Reluctance Drives Limited
    Inventors: Paul Andrew Sykes, Phillip George Dickinson
  • Patent number: 7791233
    Abstract: A high-torque electric motor having a rotor supported by an elongated torque arm comprising a pair of frustoconical-shaped support members. The rotor has a spherical-shaped outer surface and a complementarily shaped stator cavity. The spherical magnetic elements and the conical support members cooperate to brace the rotor against deflection along its rotational axis.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: September 7, 2010
    Inventor: Michael T. Attard
  • Publication number: 20100213774
    Abstract: The present invention makes it practical and easy to build machines of imbalanced and gravitating magnetic bases by using sets of magnetic bases with On/Off switches, which are adapted to revolve with horizontal spindle on a vertical plane as they achieve the intended imbalance through the lifting of weights when the magnetism of the magnetic bases are switched to “ON” and “OFF” at the vertical line zone and cause the magnetic bases to rotate.
    Type: Application
    Filed: February 20, 2009
    Publication date: August 26, 2010
    Inventor: Ezra Shimshi
  • Publication number: 20100170741
    Abstract: In a ring body of a stator, permanent magnets are arranged in alternate inter-pole magnetic path portions located between an even number of stator poles so that magnetic fields pointing in the circumferential direction of the ring body are generated. Coils are wound around alternate inter-pole magnetic path portions where permanent magnets are not provided so that magnetic fields that oppose the magnetic fields generated by the permanent magnets are generated. When electric power is not supplied to the coils, a ring-shaped magnetic circuit is formed by the permanent magnets, and therefore, magnetic flux does not leak to a rotor. When electric power is supplied to the coils, the magnetic flux of the magnetic fields of the permanent magnets and that of the coils combine with each other and flow from the stator poles to rotor poles of the rotor, whereby strong attraction force is obtained.
    Type: Application
    Filed: April 3, 2007
    Publication date: July 8, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masaharu Yamashita
  • Publication number: 20100162969
    Abstract: A heat-pipe electric power generating device including a fan disposed between an evaporating end and a condensing end of a heat-pipe is provided. A magnetic substance is disposed on the fan to form a magnetic field. A stator coil of a generator is disposed at the outer of the heat-pipe, which is corresponding to the position of the fan. An induced current is generated by the stator coil of the generator when the magnetic substance spins. Since the heat-pipe is made of copper, and the magnetic field is not shielded by copper, a current is induced when a relative motion between the magnetic substance on the fan and the stator coil of the generator at the outer of the heat-pipe is generated. Further, the heat-pipe electric power generating device can be applied on a hydrogen/oxygen gas generating apparatus and an internal combustion engine system of a motor vehicle.
    Type: Application
    Filed: February 23, 2009
    Publication date: July 1, 2010
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ra-Min Tain, Wen-Yang Peng, Yao-Shun Chen
  • Publication number: 20100156205
    Abstract: A compact, rugged, variable reluctance, variable speed, electric motor capable of producing high torque at high electrical energy conversion efficiencies is provided. The present invention provides for a multi-stage motor design having a number of discreet rotor and stator elements on a common shaft. This configuration provides for the simplest of magnetic structures and produces a powerful magnetic flux modelling design technique that is used to further optimize the motor design and subsequent control logic. Thermal mapping of the magnetic mass provides for advanced cooling techniques that are used to ensure long in-service life in the most extreme of industrial applications. The electric motor inherently provides low vibration thereby greatly reducing noise; low turn to turn voltage potentials thereby eliminating costly phase to phase shorting potential; efficient motor operation through the reduction in switching and copper losses in both the machine and its control system.
    Type: Application
    Filed: August 22, 2008
    Publication date: June 24, 2010
    Applicant: SUNCO INVESTMENTS LTD.
    Inventors: John A. Davis, Iain C Davis, Feisal A Hurzook
  • Publication number: 20100148712
    Abstract: Brushless Multiphase Self-Commutation Control (or BMSCC), also known as Real Time Emulation Control (or RTLC), is a contact-less means for powering any electric apparatus with “conditioned” or “re-fabricated” multiphase electrical excitation that is synchronized to the movement of the electric apparatus. BMSCC inherently phase-locks the frequency of excitation to any speed or position of the electric apparatus being controlled by a natural electromagnetic processing means and as a result, the BMSCC is an Electromagnetic Self-Commutator. BMSCC should never be confused with any derivative of Field Oriented Control, which is the other means of conditioning speed-synchronized electrical excitation by iteratively performing “speed-variant-to-speed-invariant” transformations and frequency synthesis by the unnatural processing means of an electronic computer. The control flexibility of BMSCC realizes additional synergistic or complementary electric apparatus inventions as shown in the illustration.
    Type: Application
    Filed: December 8, 2009
    Publication date: June 17, 2010
    Inventor: Frederick William Klatt