Permanent Magnet Stator Patents (Class 310/154.01)
  • Patent number: 10468925
    Abstract: Rotor for motor or generator, which rotor (11) includes a rotor ring (12), which rotor includes a yoke formed by yoke segments (13) which by arrangement to the rotor ring (12) forms a complete yoke. The yoke segments (13) are provided with one or more magnet blanks (19), which magnet blanks (19) are formed by one or more permanent magnets (18).
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: November 5, 2019
    Assignee: Rolls-Royce Marine AS
    Inventors: Gunnar Johnsen, Charles Skar
  • Patent number: 10171014
    Abstract: An electric machine assembly includes a rotor assembly that includes a plurality of rotor parts including a reference rotor part and a first control rotor part. Each rotor part is rotatable about a longitudinal axis and mechanically separated from another rotor part along the longitudinal axis. The first control rotor part is controllable to rotate while aligned with the reference rotor part with a zero or near zero skew angle relative to the reference rotor part. The first control rotor part is also controllable to rotate while unaligned with the reference rotor part with a non-zero skew angle relative to the reference rotor part. The electric machine assembly further includes a rotor controller that is configured to control the degree of skew angle between the control rotor part and the reference rotor part.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: January 1, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: James D. Hendrickson, Khwaja M. Rahman, William F. Miller, III
  • Patent number: 10008897
    Abstract: A motor is provided for use in a machine. The motor includes a segmented stator comprising magnetically isolated core segments.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: June 26, 2018
    Assignee: Nidec Motor Corporation
    Inventor: Gary E. Horst
  • Patent number: 9825496
    Abstract: A new and improved method for producing electric energy or mechanical power, and in particular to an improved system and method for producing rotary motion from an electro-magnetic motor or generating electrical power from a rotary motion input by concentrating magnetic forces due to electromagnetism or geometric configurations.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: November 21, 2017
    Assignee: Linear Labs, Inc.
    Inventor: Fred E. Hunstable
  • Patent number: 9803770
    Abstract: A control valve includes a shaft, a stopper mechanism, and a can. A stator coil is coaxially mounted around the can. Positions in a rotating direction of the rotor and the stator when the shaft is stopped by an operation of the stopper mechanism are set to be reference positions at which magnetic poles of the stator and those of the rotor are opposite to each other. The rotor is configured to be stopped at the reference position by an arrangement of the stopper mechanism. The stator coil is positioned relative to the body according to a positional relation between a fitting part formed on surfaces of the stator and the body attached to each other and an insertion part where the can is inserted into the stator, and magnetic poles of the stator and those of the rotor are made opposite to each other at the reference positions.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: October 31, 2017
    Assignee: TGK CO., LTD.
    Inventors: Kazushi Takahashi, Tomohiro Yuasa, Yuto Ooe
  • Patent number: 9539906
    Abstract: The earth's magnetic field has not been mined as a source of energy. With average field strength of 0.5×10?4 Tesla around the world it is easy to understand why. A disruptive technology is needed to mine the earth's magnetic field. Such a technology, graphene, is now at an early stage of development with excellent properties in the form of high conductivity, low resistivity, durable, light weight, low cost sheets. Multiple sheets of graphene provide a significant multiplier to earth's magnetic field yielding a feasible source of ecologically clean power. Graphene based EcoCharge units can be driven by electric motors putting graphene in motion to mine the earth's magnetic field. Estimates show that for a Solar Impulse 2 like electric plane, eight EcoCharge units weighing 64 lbs generate 60 kW RMS continuously replacing 3,000 lbs of photovoltaic cells generating 50 kW RMS during the day only.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: January 10, 2017
    Inventor: Dennis Drake McCrady
  • Patent number: 9035527
    Abstract: A motor has a plurality of permanent magnet pieces aligned is such a manner as to surround an armature core and a magnetic-flux guide ring disposed between the permanent magnet pieces and the armature core for introducing a magnetic flux from the permanent magnet pieces to the armature core. The magnetic-flux guide ring has a confronting portion confronting each of the magnet pieces, an aperture formed in the confronting portion, and a connecting portion connecting adjacent two confronting portions. The aperture is formed in such a manner as to confront a boundary of adjacent magnet pieces.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: May 19, 2015
    Assignee: ASMO CO., LTD.
    Inventors: Masashi Matsuda, Tomohiro Aoyama
  • Publication number: 20150130329
    Abstract: An electric motor includes a yoke having a cylindrical section, two pairs of permanent magnets disposed at an inner circumferential surface of the cylindrical section to oppose each other, and an armature rotatably supported further inside in a radial direction than the permanent magnets, wherein at least a pair of first flat sections opposing each other in the radial direction are formed at the cylindrical section, and the permanent magnets are disposed at positions distant from the first flat sections.
    Type: Application
    Filed: May 25, 2012
    Publication date: May 14, 2015
    Inventors: Yoshichika Kawashima, Teppei Tokizaki, Naoki Kojima
  • Patent number: 9000645
    Abstract: The rotating electrical machine of the present invention includes: a magnet holder made of a non-magnetic material, which is formed by coupling a columnar portion for retaining the permanent magnet in a circumferential direction, and an annular portion for covering each axial side surface of the permanent magnet. The magnet holder includes, on an outer diameter side of both circumferential side surfaces of the columnar portion, engaging portions which engage with respective locking portions of the magnet cover, and includes, on an inner diameter side of each of both the circumferential side surfaces of the columnar portion, an extending portion extending along an inner peripheral surface of the magnet cover with a clearance (D) with respect to the inner peripheral surface of the magnet cover.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: April 7, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Onishi, Masafumi Okazaki, Katsumi Ohata, Akio Fujiwara, Wataru Hirosue
  • Publication number: 20150061440
    Abstract: Halbach Array electric motor with substantially contiguous electromagnetic cores, comprised of a plurality of electromagnets arranged in Halbach Array sequence, whose horizontal cores are equipped with fork-like prongs to provide substantial contiguity with vertical cores, assembled to serve as a circular or linear stator, rotor or both, and a plurality of permanent magnets likewise arranged in a Halbach Array sequence, assembled to serve as a circular or linear stator or rotor where required.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Inventor: Roberto Sanchez Catalan
  • Publication number: 20150001976
    Abstract: This disclosure relates in general to a new and improved method for producing electric energy or mechanical power, and in particular to an improved system and method for producing rotary motion from a electro-magnetic motor or generating electrical power from a rotary motion input by concentrating magnetic forces due to electromagnetism or geometric configurations.
    Type: Application
    Filed: September 18, 2014
    Publication date: January 1, 2015
    Inventor: Fred E. Hunstable
  • Publication number: 20140354099
    Abstract: A magnetic motor includes a rotor and a stator, in which there are magnets and materials of high magnetic permeability. The stator magnets are arranged with surfaces facing the rotor magnets in a staggered arrangement. The motor may be used to boost torque, for example in bicycles.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Inventor: Ramon FREIXAS VILA
  • Publication number: 20140285042
    Abstract: A DC electric motor (10) comprises a rotor (30) rotably attached to a stator (20). The rotor (30) comprises an output shaft (31) and a rotor core (33), and a plurality of winding coils (35) wound on the rotor core (33) and electrically connected to a commutator (34) on the output shaft (31). An insulating sleeve (32) is disposed between the output shaft (31) and rotor core (33), forming a capacitor between the output shaft (31) and rotor core (33), thereby reducing the EMI caused by the fluctuating current in the winding coils (35).
    Type: Application
    Filed: March 25, 2014
    Publication date: September 25, 2014
    Applicant: JOHNSON ELECTRIC S.A.
    Inventors: James Ching Sik LAU, Tongjie LI, Guowei SUN, Qingbin LUO, Hongwei ZHANG, Huiting ZHONG
  • Publication number: 20140285047
    Abstract: The earth's magnetic field has not been mined as a source of energy for electric vehicles. With average field strength of 0.5 Tesla around the world it is easy to understand why it has been overlooked. A disruptive technology is needed to mine the earth's magnetic field for powering electric vehicles. Such a technology, graphene, is now at an early stage of development with excellent properties in the form of high conductivity, low resistivity sheets that are durable, light weight, and low cost. Electrical properties of multiple sheets of graphene provide a significant multiplier to earth's weak magnetic field yielding a feasible source of ecologically clean power for electric vehicles. Graphene based EcoCharge systems can be mounted on a vehicles drive shaft and axles putting graphene in motion to mine the earth's magnetic field. Estimates show that EcoCharge can generate 15.1 kW at 60 mph while weighing only 10 oz.
    Type: Application
    Filed: March 19, 2013
    Publication date: September 25, 2014
    Inventor: Dennis Drake McCrady
  • Publication number: 20140267458
    Abstract: A power generation system is provided configured for installation within a wheel of a vehicle. The system includes a stator having a plurality of face-mounted permanent magnets; and a rotor having a plurality of windings configured to rotate, with rotation of the wheel, in proximity to the permanent magnets thereby generating a current. The stator is mounted to a brake caliper of the vehicle. Also provided is a wheel-based vehicle display system including a light emitting diode (LED) array arranged on or within a wheel of a vehicle; a power source connected thereto; and a controller connected to the LED array. The display system is configured to display at least one of: textual information, visual images or full-motion video.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: Foundation Productions, LLC
    Inventors: Ronald Fisher, Bryan Davis, John Peery, Michael Prados, Roni Robinzon
  • Patent number: 8823234
    Abstract: An electric motor has a rotor and a stator. The rotor or the stator has arced permanent magnets that have essentially the same inner radius (IR) and outer radius (OR). In an aspect, the stator has a stator housing having a plurality of poles. Each pole includes a plurality of flat magnets affixed to an inner surface of the stator housing. In an aspect, flats on the outside of the stator housing key the stator assembly in a power tool housing. In an aspect, flat magnets are pre-magnetized, pre-assembled with alternating magnetic polarities, inserted into a stator housing, and remagnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets and unmagnetized magnets are pre-assembled with unmagnetized magnets between magnetized magnets, the pre-assembled magnets inserted into a stator housing, and the unmagnetized magnets magnetized to a final, desired magnetic polarity configuration.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: September 2, 2014
    Assignee: Black & Decker Inc.
    Inventors: Earl M. Ortt, Hung T. Du, Sankarshan Murthy
  • Patent number: 8796900
    Abstract: An electric motor has a stator, a rotor and brush gear. The rotor includes a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft, and rotor windings wound on the rotor core and electrically connected to the commutator. The brush gear includes at least two arcuate brushes for making sliding contact with the commutator. The commutator and brush gear are disposed within a space formed in the rotor core to minimize the axial length of the motor.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 5, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Ji Dong Chai, Yan Nian Liu, Liang Guan, Bao Ting Liu
  • Patent number: 8786145
    Abstract: Described herein is a ball joints universal rotary motor, a manufacturing method and a working mechanism thereof. The ball joints universal rotary motor comprises a housing, a spherical-cap shaped stator body, and a rotor body configured to be secured within the stator body. The stator body is made from a permanent magnet. The rotor body comprises multiple layers of armatures and multiple spacer layers. The multiple layers of armatures are symmetrically distributed along the axis of the rotor body. A spacer layer is provided between two adjacent layers of armatures. The multiple layers of armatures and multiple spacer layers are securely connected by a bolt. The bolt and the rotor body are axially connected. The rotor body is of a spherical shape. Each layer of the armatures is wound with two layers of coils: a first layer and a second layer. The motor as provided is configured to realize movement in multiple directions.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: July 22, 2014
    Inventor: Kuokwa Ho
  • Publication number: 20140145537
    Abstract: In one embodiment, a motor has a rotor with an approximated ellipsoid shape defined by a plurality of lattice lines and a plurality of lattice points. The motor has a matching stator that is configured to be utilized in conjunction with the approximated ellipsoid shaped rotor and to accommodate the approximated ellipsoid shaped rotor. The motor may also includes a housing unit configured to hold the matching stator that is utilized in conjunction with the approximated ellipsoid shaped rotor, and an enclosure lid configured to be used by the housing unit. The enclosure lid may be configured to hold the rotor having the approximated ellipsoid shape with a bearing.
    Type: Application
    Filed: January 30, 2014
    Publication date: May 29, 2014
    Applicant: FXQ Engineering Group, LLC
    Inventors: Filipe Goncalves, Chong Kyu Kim
  • Publication number: 20140062267
    Abstract: Disclosed herein is a design for flux switching machines with one or more armature windings which can deliver controlled torque, in either selected direction on start up, without the use of a mechanical position sensor. Flux switching machines without sensors can operate equally well in either direction. The invention discloses design features for such machines which improves the torque profile of the motor with angle. In three phase machines this delivers higher torque and lower ripple torque. In single phase flux switching machines the invention allows the rotor to be placed in a position where maximum torque can be delivered in either direction by selection of either positive or negative armature current. Rotor slotting is introduced to create a path of low permeability across a rotor tooth with minimal impact on the normal torque producing flux paths. Asymmetry of stator slots is used to further create a stable rotor position when energised by predominantly field means or armature means.
    Type: Application
    Filed: March 26, 2012
    Publication date: March 6, 2014
    Applicant: TECHNELEC LTD
    Inventors: Charles Pollock, Helen Pollock
  • Publication number: 20140042852
    Abstract: Disclosed herein is an axial flux permanent magnet (AFPM) motor including: a stator including a stator core, a magnet wire wound around the stator core, a shaft, and a stator core supporting member fixedly supporting the stator core to the shaft; and a rotor including a rotor case having a space part formed therein so as to receive the stator core therein, a magnet fixedly coupled to an inner side portion of the rotor case so as to face the stator core, and a bearing rotatably supporting the rotor case to the shaft, wherein a ratio between the number of stator slots by the stator core and the number of poles of the rotor by the magnet is (6×n+9):((6×n+9)+1) or (6×n+9):((6×n+9)?1) where n indicates a positive integer number including 0.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 13, 2014
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sang Jong Lee, Hee Soo Yoon, Han Kyung Bae
  • Patent number: 8648514
    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: Grant
    Filed: April 28, 2009
    Date of Patent: February 11, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideaki Arita, Masaya Inoue, Masahiro Iezawa, Hayato Yoshino, Kazuhiko Baba, Hitoshi Kawaguchi, Toshihiko Miyake
  • Patent number: 8610325
    Abstract: The generator contains an outer casing, a non-magnetic rotor, an inner casing, outer stators, and inner stators. The non-magnetic rotor has an internal storage space, and is axially mounted on an axle and housed inside the outer casing with the axle rotatably supported by two ends of the outer casing. The outer stators are configured on an inner circumferential surface of the outer casing. Correspondingly, a number of coils are configured on an outer circumferential surface of the non-magnetic rotor. The inner casing is housed inside the storage space with the inner stators configured on an outer circumferential surface of the inner casing. The inner casing is rotatably configured on the axle by a number of bearings. The outer and inner stators are of reversed magnetic polarities so that, when the axle spins, the inner stators remain still due to the magnetic attraction from the outer stators.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: December 17, 2013
    Inventor: Tai-Liang Chen
  • Publication number: 20130278103
    Abstract: A stator for an electrical motor or generator and method for manufacturing such stator includes providing a plurality of teeth and joining the teeth with a yoke. An electrically conductive winding is applied around each of the teeth. The teeth and/or yoke may be made from a stack of low-loss magnetic material sheets. The teeth and/or yoke may be made by folding a stack of magnetic material sheets.
    Type: Application
    Filed: December 13, 2011
    Publication date: October 24, 2013
    Inventors: Mark W. McPherson, Andrew D. Hirzel
  • Publication number: 20130249339
    Abstract: A winding structure which is disposed over an armature and a commutator includes an equalizer. The equalizer includes a going portion and a return portion which are wound across one group of teeth through a slot and connected between two identical segments. In a case where an integer number is an expansion value among values which are integer multiples of a value which is acquired by dividing the total number of the slots by the total number of pole pairs, when one group of the teeth having the same total number as the expansion value is given as an element teeth group, the going portion and the return portion are wound across the element teeth group through the slots positioned at both sides of the element teeth group.
    Type: Application
    Filed: January 24, 2012
    Publication date: September 26, 2013
    Applicant: NIDEC CORPORATION
    Inventors: Yusuke Makino, Takahiro Hiwa, Shohei Osuga
  • Publication number: 20130241334
    Abstract: Permanent magnet (10), containing at least one metal component (13) from the group of the rare earth metals, comprising a first coating film (20), which forms a cathodic protection against corrosion for the permanent magnet (10), the first coating film (20) containing a metal (23) which is more electronegative in the electrochemical series than the metal component (13) of the permanent magnet (10), wherein a second coating film (30), which is embodied in an electrically insulating fashion, is applied on the first coating film (20).
    Type: Application
    Filed: March 13, 2013
    Publication date: September 19, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventors: Maik Zernikow, Klaus Eppel
  • Patent number: 8525627
    Abstract: A high-performance variable-magnetic-field dipole-ring magnetic circuit is provided. Specifically, provided is a permanent-magnet magnetic field generator having inner and outer dipole rings which share a central axis, and a yoke which surrounds the dipole rings, wherein a unidirectional variable magnetic field is generated in a space within the inner dipole ring. The generator has a fastener for fixing the inner dipole ring, and a rotator for allowing the outer dipole ring to rotate around the central axis. In the generator, each of the inner and outer dipole rings has a plurality of permanent magnets arranged in such a ring shape that a magnetization direction of the permanent magnets can make a full rotation per half circle of the ring.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: September 3, 2013
    Assignee: Shin—Etsu Chemical Co., Ltd.
    Inventor: Dai Higuchi
  • 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: 20130187503
    Abstract: There is provided a single phase induction vibration motor including: a bottom member having a shaft and a permanent magnet; a rotating member rotatably coupled to the shaft; a coil member disposed on the rotating member; and a magnetic member disposed on the rotating member to determine a stationary position of the rotating member, wherein the magnetic member is disposed to partially overlap with a region in which the permanent magnet is positioned, based on a horizontal surface of the rotating member.
    Type: Application
    Filed: April 5, 2012
    Publication date: July 25, 2013
    Inventors: Yong Tae Kim, Kyung Su Park, Dong Su Moon
  • Publication number: 20130162087
    Abstract: A wiper motor 10 includes: an armature 20; an armature shaft 21; a core 20a composed of eighteen teeth portions; a commutator 23 having eighteen commutator bars 23a1 to 23a18; and a winding 20b composed of eighteen coil portions 20b1 to 20b18; an equalizer 27 composed of nine connecting conductors 27a1 to 27a9; a first brush 36, a second brush 35 shifted from a first brush 26 by 90 degrees, and a third brush 37 shifted from the first and second brushes by 90 or more degrees, each brush being arranged so as to come in sliding contact with the commutator bars, the first brush being connected to a common electric potential, a current for rotating the armature at low speed is selectively supplied to the second brush, and a current for rotating the armature at high speed is selectively supplied to the third brush.
    Type: Application
    Filed: February 20, 2013
    Publication date: June 27, 2013
    Applicant: MITSUBA CORPORATION
    Inventor: MITSUBA CORPORATION
  • Publication number: 20130049510
    Abstract: The present invention relates to automobile seat motor including: a motor housing having a first flux ring coupling portion formed at the inside of the front side thereof; a first flux ring coupled to the first flux ring coupling portion and having a ring magnet coupled to the inside thereof; a motor shaft located at the center of the first flux ring coupling portion in such a manner as to be coupled rotatably to the motor housing; and a rotor located at the center of the inside of the ring magnet in such a manner as to be rotated together with the motor shaft.
    Type: Application
    Filed: April 15, 2011
    Publication date: February 28, 2013
    Applicant: B.M.C Co., Ltd.
    Inventors: Kwang Ho Choi, Bumre Roh
  • Patent number: 8347884
    Abstract: A brushless fan motor includes a case, a tubular part disposed in the case and fixed at a bottom of the case, at least a bearing disposed in the tubular part, a toric coil surrounding the tubular part, and a rotating assembly. The rotating assembly includes a turntable, a rotating shaft, a loading ring, a permeability metal element and a toric radial magnet. The turntable has a top surface and fan blades disposed on the top surface. The rotating shaft is disposed through the bearing and connected to the turntable. The loading ring connected to the turntable surrounds the toric coil. The permeability metal element includes an annular part fixed at an inner wall of the loading ring. The toric radial magnet is fixed at an inner wall of the annular part. A positive airway pressure breathing apparatus using the brushless fan motor is also provided.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: January 8, 2013
    Assignee: Lead Data Inc.
    Inventors: Feng-Kun Cheng, Chih-Yang Hsiao
  • Publication number: 20120299405
    Abstract: An electric motor includes an inner stator including inner magnetic poles arranged circumferentially, an outer stator including outer magnets arranged circumferentially, and a rotor rotatably disposed between the inner and outer stators. The rotor includes a shaft, a rotor core fixed to the shaft and a winding wound on the rotor core. The rotor core includes a ring shaped yoke having a plurality of inner teeth extending inwardly and a plurality of outer teeth extending outwardly. The winding includes a plurality coils each including an inner side received in a corresponding inner slot formed between adjacent inner teeth and an outer side received in a corresponding outer slot formed between adjacent outer teeth.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 29, 2012
    Inventors: Yue Li, Mao Xiong Jiang, Jian Zhao, Zhi Jun Wang, Ya Ming Zhang, Hai Hui Xiang
  • Patent number: 8278774
    Abstract: A gas turbine engine including an electrical assembly operable as at least one of an electric motor and a generator, with an electromagnetic rotor formed in part by a portion of one of a main shaft concentrically and drivingly connected to at least one turbine rotor and a tower shaft directly driven by the main shaft and extending generally radially therefrom.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: October 2, 2012
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Enzo Macchia
  • Publication number: 20120194022
    Abstract: An electric motor has a stator and a rotor rotatably installed in the stator. The stator includes a housing, a plurality of magnets installed at an inner surface of the housing, a brush card installed inside of the housing, brushes mounted on the brush card, lead wires for connecting to a power source and feeding power to the brushes, and an end cap attached to an end of the housing and covering the brushes. The rotor includes a shaft, a commutator fixed on the shaft, a rotor core fixed on the shaft and a winding wound on the rotor core and connected to the commutator. An EMI suppression component is mounted on the brush card and covered by the end cap, and the lead wires extends through the EMI suppression component.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Inventors: James Ching Sik LAU, Chun Kit Cheung, Duncan Yiu Lung Wong
  • Publication number: 20120194023
    Abstract: An electric motor includes a stator and a rotor rotatably installed in the stator. The stator has a housing and a plurality of permanent magnets. The outer diameter of the housing is less than 40 mm and the ratio of the maximum thickness of the magnets in the radial direction of the rotor to the diameter of the rotor is in the range of 1:7 to 1:50.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Inventors: James Ching Sik LAU, Chun Kit Cheung, Duncan Yiu Lung Wong
  • Patent number: 8222785
    Abstract: A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: July 17, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Matahiro Komuro, Yuichi Satsu, Takao Imagawa
  • Publication number: 20120153760
    Abstract: A yoke for a permanent magnet machine shows a surface with an accommodation area for accommodating a permanent magnet, wherein two recesses are provided adjacent to the accommodation area to increase reluctance.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 21, 2012
    Inventor: Mohammad Kimiabeigi
  • Publication number: 20120133228
    Abstract: The generator contains an outer casing, a non-magnetic rotor, an inner casing, outer stators, and inner stators. The non-magnetic rotor has an internal storage space, and is axially mounted on an axle and housed inside the outer casing with the axle rotatably supported by two ends of the outer casing. The outer stators are configured on an inner circumferential surface of the outer casing. Correspondingly, a number of coils are configured on an outer circumferential surface of the non-magnetic rotor. The inner casing is housed inside the storage space with the inner stators configured on an outer circumferential surface of the inner casing. The inner casing is rotatably configured on the axle by a number of bearings. The outer and inner stators are of reversed magnetic polarities so that, when the axle spins, the inner stators remain still due to the magnetic attraction from the outer stators.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 31, 2012
    Inventor: TAI-LIANG CHEN
  • Patent number: 8138648
    Abstract: A motor comprises a stator and a rotor (20) disposed within the stator. The stator comprises: a housing (31) having a polygon cross section that comprises a plurality of side portions (32a-32d) and a plurality of curved corner portions (33a-33d), each of the corner portions connect two adjacent side portions and curve around a center (O?) which is offset from the rotational center (O) of the rotor; and a ring magnet (34) fixed to the inner surface of the housing. An air gap (37) is formed between a peripheral surface of the rotor (35) and an inner surface of the ring magnet (34). The thickness of the ring magnet at portions corresponding to the corner portions (33a-33d) of the housing being larger than the thickness of the ring magnet at portions corresponding to the side portions (32a-32d) of the housing.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: March 20, 2012
    Assignee: Johnson Electric S.A.
    Inventors: Ben To Fan Wong, Biao Yu, Tian Jun Liao
  • Patent number: 8080914
    Abstract: Disclosed herein is a rotation power generating device. The rotation power generating device includes a stator consisting of a plurality of stationary units vertically connected to one another, and a rotator consisting of a plurality of rotating units vertically connected to one another with an angular orientation difference therebetween. Each of the stationary units has a pair of stationary magnets symmetrically embedded inside an inner surface thereof. Each of the rotating units has a pair of rotating magnets and is adapted to be rotated along the inner surface of the corresponding stationary unit about a rotating shaft that is installed in the center of the stator. The rotation power generating device compensates for energy loss of initially acting torque using repulsive force between magnets of the same polarity, resulting in reduced power loss and more effective transmission of energy.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: December 20, 2011
    Inventor: Dong goo Han
  • Patent number: 8063529
    Abstract: A motor comprises a stator and a rotor (20) disposed within the stator. The stator comprises a shell comprising a plurality of sidewalls (10a-10d) and arcuate connection parts (11a-11d) connecting neighboring sidewalls. The cross section of the shell is a polygon with fillets. The stator also comprises a plurality of magnets (12a-12d) installed inside the arcuate connection parts. The magnets (12a-12d) are mutual arranged at intervals. The outer surface of each magnet (12a-12d) is attached to inner surfaces of the two neighboring sidewalls (10a-10b) and a gap is formed between the magnet and the inner surface of the corresponding arcuate connection part. Air gaps are formed between the inner surface of the magnets (12a-12d) and the outer surface of the rotor. Disposing the magnets inside the arcuate connection parts improves the space utilization ratio.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: November 22, 2011
    Assignee: Johnson Electric S.A.
    Inventors: Ben To Fan Wong, Biao Yu, Tain Jun Liao
  • Publication number: 20110277659
    Abstract: A dynamic magnetic suspension propeller includes an separate body electromotor and an external force to reversely rotate the separate body electromotor. The separate body electromotor includes a stator and a rotor mounted separately, wherein the stator includes a single layer plane magnetic path having magnetism, the rotor includes a cantilever electromagnet having a first pole provided at an end portion of the cantilever and a second pole provided at a rotating shaft close to the cantilever, wherein the electromagnet is reversely rotated by the external force around the rotating shaft with respect to the stator, so as to produce a countertorque with respect to an magnetic force of the stator, wherein the countertorque includes a magnetic suspension force and a magnetic propelling force.
    Type: Application
    Filed: December 7, 2009
    Publication date: November 17, 2011
    Inventor: Kwang Hwee Lee
  • Patent number: 8049387
    Abstract: An electric motor has a rotor (20), a housing (10) and a ring magnet (12) fixed onto an inner surface of the housing. The housing (10) has a cross section in a polygon, preferably tetragonal, shape that comprises a plurality of side portions (10a˜10d) and a plurality of curved corner portions (11a˜11d), each of which connects two adjacent side portions. The thickness of the ring magnet at portions corresponding to the corner portions of the housing is larger than the thickness of the ring magnet at portions corresponding to the side portions of the housing. An air gap (123) is formed between a peripheral surface of the rotor and an inner surface of the ring magnet, the thickness of the air gap at portions corresponding to the corner portions of the housing being smaller than that of the air gap at portions corresponding to the side portions of the housing. The motor has a polygon housing which is convenient to install and has good space utilization.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: November 1, 2011
    Assignee: Johnson Electric S.A.
    Inventors: Ben To Fan Wong, Biao Yu, Tian Jun Liao
  • Patent number: 8030868
    Abstract: A electric motor is disclosed in which torque ripple is reduced. The electric motor includes a single motor shaft. Rotors are disposed so as to be mutually offset in phase, and the rotors are secured to the motor shaft. Stators are arranged so as to individually correspond to the rotors, and the stators are disposed so as to be matched in phase. The phases of torque ripple generated in each motor unit, which is comprised of a combination of a single rotor and a single stator, are offset.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: October 4, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshihiko Yamagishi, Yoshihisa Hirose, Tsutomu Mizoroke
  • Publication number: 20110121577
    Abstract: A method and device for using radial relative displacement between a magnet and coil to generate electricity from fluid motion. The device includes a support structural component, a moveable magnetic structure, a rotating structural component, and bearings. The moveable magnetic structure is coupled to the support structural component. The rotating structural component rotates relative to the support structural component. The bearings are coupled to or disposed with the rotating structural component. The rotation of the rotating structural component results in forces applied by the bearings on the moveable magnetic structure and movement of the moveable magnetic structure.
    Type: Application
    Filed: October 18, 2010
    Publication date: May 26, 2011
    Applicant: OSCILLA POWER INC.
    Inventor: Balakrishnan Nair
  • Publication number: 20110116955
    Abstract: A fuel pump may include a motor section comprising a rotor and a stator. One of the rotor and the stator may have at least a pair of permanent magnet parts disposed along a first circumferential surface at an interval in a circumferential direction, and at least two magnetic material parts disposed between ends of adjacent permanent magnet parts. The other one of the rotor and the stator may have a first yoke disposed so as to face the permanent magnet parts, wherein a plurality of slots are formed on the first yoke at an interval in the circumferential direction. A surface facing the slots of the magnetic material parts may be shifted, in at least a partial range in the circumferential direction including a permanent magnet part side end where a polarity of a first circumferential surface side is a north pole, from the first circumferential surface in a direction along which a distance to the slots increases.
    Type: Application
    Filed: November 15, 2010
    Publication date: May 19, 2011
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hiroaki Naito, Kazumichi Hanai
  • Patent number: 7816802
    Abstract: A electricity generating assembly includes a plurality of rotatable fan blades. A generator is connected to the plurality of fan blades to convert rotation of the fan blades into electricity. A plurality of shutters surround the plurality of fan blades. The plurality of shutters are movable between a first position in which said plurality of shutters are open to allow access to the plurality of fan blades and a second position in which the plurality of shutters are closed to prevent access to the plurality of fan blades. A motor is connected to the plurality of shutters to move the plurality of shutters between the first and second positions.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: October 19, 2010
    Inventor: William M Green
  • Publication number: 20100244604
    Abstract: A power generating apparatus and a motor are disclosed. The disclosed power generating apparatus comprises a stator being comprised of nonferrous metal; and a rotator. The disclosed motor comprises a field iron core; a motor case being comprised of nonferrous metal; and a stator magnet having the same width as the width of a magnet facing portion of the field iron core. By he disclosed power generating apparatus and the disclosed motor, the efficiency is enhanced.
    Type: Application
    Filed: October 29, 2008
    Publication date: September 30, 2010
    Inventor: Jin Dong Kim
  • Patent number: 7800470
    Abstract: A linear actuating device contains a top magnet and a bottom magnet. The bottom magnet is axially aligned with the top magnet. The top magnet and the bottom magnet have opposing magnetization. A washer is sandwiched between the top magnet and the bottom magnet. A top coil is positioned within the top magnet. A bottom coil is positioned within the bottom magnet. A slug is slidably positioned within the top coil and bottom coil. An actuating member is integral with the slug.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: September 21, 2010
    Assignee: Engineering Matters, Inc.
    Inventors: Andrew M. Wright, Christopher Corcoran, David Cope