Magnetic Motors Patents (Class 310/46)
  • Patent number: 10897169
    Abstract: Provided herein is a fan motor including a rotating shaft, a stator including hole in which the rotating shaft is disposed, a rotor disposed outside the stator, a fan coupled to the rotating shaft, and a housing in which the stator and the rotor is disposed, wherein the rotor includes a yoke and a first magnet coupled to the yoke, and the fan motor further includes a magnetic fluid disposed between the first magnet and the stator. The magnetic fluid is filled in a gap between the stator and the magnet of the rotor and keeps the inside of the motor airtight, thereby having an advantageous effect of preventing introduction of salt water or foreign substances into the motor.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: January 19, 2021
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Dae Gil Byeon
  • Patent number: 10804779
    Abstract: The present invention provides a multi-rotor permanent magnet synchronous motor, wherein the motor (100) includes a motor shaft (3) and the main mechanism (1) and the auxiliary mechanism (4) sleeved on the motor shaft (3) in turn which work in parallel; the auxiliary mechanism (4) includes a one-way bearing body (41) sleeved on the motor shaft (3) and auxiliary rotor components (40) sleeved on the one-way bearing body (41). The multi-rotor permanent magnet synchronous motor in the present invention does not need a gear box to drive, and the energy consumption is low. Besides, through the coordinative work of the main structure and the auxiliary mechanism, different torques can be output, so as to output different speeds.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: October 13, 2020
    Assignee: GAM SHINE TECHNOLOGY CO., LIMITED
    Inventors: Kenny Chen, Huiming Zhang
  • Patent number: 10778050
    Abstract: A DC generator without reversing, belonging to the electromechanical field.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: September 15, 2020
    Inventor: Ziwei Chen
  • Patent number: 10680502
    Abstract: A magnetically geared apparatus (400), a pole piece component (420) and a plurality of pole pieces (422) for such apparatus are disclosed. The magnetically geared apparatus (400) comprises the pole piece component (420) and the pole piece component (420) comprises the plurality of pole pieces (422) mounted to a carrier (421), wherein at least one of the pole pieces (500) comprises at least two axially-spaced portions spaced apart by a portion of a higher magnetic reluctance (560) than that of each of the two axially-spaced portions.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: June 9, 2020
    Assignee: MAGNOMATICS LIMITED
    Inventors: David James Powell, Petr Chmelicek
  • Patent number: 10662036
    Abstract: Methods and systems are provided for a winch including a motor and a contactor assembly positioned within a same housing. In one example, the contactor assembly is coupled to the motor and includes two or more coils spaced apart from one another within a contactor housing of the contactor assembly and a brush assembly including a plurality of brushes surrounding a rotational axis of the motor and arranged axially to the motor armature.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: May 26, 2020
    Assignee: WARN INDUSTRIES, INC.
    Inventors: Darren G. Fretz, Bryan Averill, Clark Brumet, Thomas Paasch, Kevin Christensen
  • Patent number: 10658910
    Abstract: A high rotor pole switched reluctance machine (HRSRM) employs an axial and radial mirroring concept and is represented by a first Multiple Rotor Pole (MRP) formula and second Multiple Stator Pole (MSP) formula. A multiple rotor HRSRM comprises at least two rotors each having a plurality of rotor poles and at least two stators having a plurality of stator poles. The at least two rotors and the at least two stators are positioned about a central axis with the stator placed between the rotors. In other embodiments, the number of stators equals the number of rotors and effectively operate as a single stator and rotor. In yet another embodiment, the effective single stator and rotor type high rotor pole switched reluctance machine is realized as single stator and rotor positioned concentrically around a central axis.
    Type: Grant
    Filed: March 4, 2018
    Date of Patent: May 19, 2020
    Assignee: Software Motor Company
    Inventors: Mahesh Krishnamurthy, Mark Johnston, Trevor Creary, Piyush Desai
  • Patent number: 10594192
    Abstract: A brushless motor is provided, the brushless motor having: a rotor disk including a plurality of permanent magnets attached to the rotor disk around a circumference of the rotor disk; a plurality of C-coils arranged in connected pairs; at least one circuit in electronic communication with one or more of the C-coils; and at least one optical sensor in electronic communication with the one or more circuits, the optical sensor positioned adjacent to the rotor disk at a radius of a plurality of optical slots in the rotor disk; wherein the circuit outputs a voltage to one or more of the plurality of C-coils, and wherein a value of the output voltage from the circuit is based on the optical sensor being in alignment with one of the plurality of optical slots of the rotor disk.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: March 17, 2020
    Inventor: Anoup Kaul
  • Patent number: 10570494
    Abstract: A soft magnetic material comprises a plurality of iron-containing particles and an insulating layer on the iron-containing particles, the insulating layer comprising an oxide. The soft magnetic material is an aggregate of permeable micro-domains separated by insulation boundaries.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 25, 2020
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah, Jayaraman Krishnasamy
  • Patent number: 10559990
    Abstract: A motor comprises a stator comprising at least one core; a coil wound on the at least one core of the stator; a rotor having a rotor pole and being rotatably mounted relative to the stator; and at least one magnet disposed between the rotor and the stator. The at least one core comprises a composite material defined by iron-containing particles having an alumina layer disposed thereon.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 11, 2020
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah, Jayaraman Krishnasamy
  • Patent number: 10559991
    Abstract: A motor comprises a stator comprising at least one core; a coil wound on the at least one core of the stator; a rotor having a rotor pole and being rotatably mounted relative to the stator; and at least one magnet disposed between the rotor and the stator. The at least one core comprises a composite material defined by iron-containing particles having an alumina layer disposed thereon.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 11, 2020
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah, Jayaraman Krishnasamy
  • Patent number: 10554089
    Abstract: An electric motor, a gimbal and an unmanned aerial vehicle. The electric motor includes: a stator assembly; and a rotor assembly rotatably connected with the stator assembly. The stator assembly includes a stator housing for installation of a stator, the rotor assembly includes a rotor housing for installation of a rotor, and at least one of the stator housing and the rotor housing has a connecting arm. The gamble includes an electric motor group. At least one electric motor in the electric motor group is the above electric motor.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: February 4, 2020
    Assignee: ZEROTECH (SHENZHEN) INTELLIGENCE ROBOT CO., LTD.
    Inventors: Gengpeng Liu, Hongtao Sun
  • Patent number: 10461617
    Abstract: A high rotor pole switched reluctance machine (HRSRM) employs an axial and radial mirroring concept and is represented by a first Multiple Rotor Pole (MRP) formula and second Multiple Stator Pole (MSP) formula. A multiple rotor HRSRM comprises at least two rotors each having a plurality of rotor poles and at least two stators having a plurality of stator poles. The at least two rotors and the at least two stators are positioned about a central axis with the stator placed between the rotors. In other embodiments, the number of stators equals the number of rotors and effectively operate as a single stator and rotor. In yet another embodiment, the effective single stator and rotor type high rotor pole switched reluctance machine is realized as single stator and rotor positioned concentrically around a central axis.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: October 29, 2019
    Assignee: Software Motor Company
    Inventors: Mahesh Krishnamurthy, Mark Johnston, Trevor Creary, Piyush Desai
  • Patent number: 10393499
    Abstract: A method of determining an angle by an encoder includes generating a first angle data based on a rotation of a bipolar magnet and a second angle data based on a rotation of the multipolar magnet; determining a first waveform signal based on the first angle data and a second waveform signal based on the second angle data; converting the first waveform signal into a third waveform signal having a cycle similar to the second waveform signal; calculating an angle result value as a function of the second angle data and a determined value about a location of a rotation cycle of the multipolar magnet based on a difference between the second waveform signal and the third waveform signal; and determining an absolute angle corresponding to the calculated angle result value based on stored angle data.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: August 27, 2019
    Assignee: FASTECH CO., LTD.
    Inventors: Jae Wook Jeon, Nguyen Xuan Ha, Jae Wan Park, Jun Young Moon, Tae Won Kim, Do Eon Lee
  • Patent number: 10326346
    Abstract: A movement generating device (10) comprising an input energy source (30), a shaft (28) adapted for movement substantially along a first axis with energy provided from said input energy source (30), a traction magnetic device (14) connected to said shaft (28), a power magnetic device (16) that is fixed in position, wherein the traction magnetic device (14) moves across the power magnetic device (16) to produce a movement from which energy can be produced.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: June 18, 2019
    Inventor: Paul V. Hampton
  • Patent number: 10312776
    Abstract: A synchronous motor with permanent magnets includes a rotor (110) provided with permanent magnets, and a winding (120) formed by overlapping coils located inside a slotless stator (100). The winding coils (120) are regularly distributed all around the 360° of the inside surface of the stator (100) and the ends of the coils are designed such that the winding has the same thickness throughout and the ends of the winding are at least partially inside the slotless stator (100).
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: June 4, 2019
    Assignee: Infranor Holding SA
    Inventors: Giampiero Tassinario, Ivan Flotats, Francesc Cruellas
  • Patent number: 10284121
    Abstract: An IPM motor in which the absolute position of the rotor may be determined is disclosed. The IPM motor includes asymmetries in both the rotor and the stator. The rotor includes an asymmetrical pole configuration for one of the pole pairs in the rotor, and the stator includes a different number of turns for each winding of one phase of the motor. The different number of turns on each winding causes a different magnitude of flux to be generated with each winding. The flux interacts with the asymmetrical pole pair to identify to which winding the asymmetrical pole is proximate. A position sensing routine identifies an angular position with respect to each winding. The position sensing routine, in combination with the flux interaction between the windings and the asymmetrical pole provide an absolute position of the rotor within the IPM motor.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: May 7, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Xikai Sun, Gennadi Sizov, Robert H. Schmidt
  • Patent number: 9887598
    Abstract: A motor comprises a stator comprising at least one core; a coil wound on the at least one core of the stator; a rotor having a rotor pole and being rotatably mounted relative to the stator; and at least one magnet disposed between the rotor and the stator. The at least one core comprises a composite material defined by iron-containing particles having an alumina layer disposed thereon.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 6, 2018
    Assignee: Persimmon Technologies Corporation
    Inventors: Martin Hosek, Sripati Sah, Jayaraman Krishnasamy
  • Patent number: 9768654
    Abstract: A motor, including at least a stator, including at least a stator core and a coil winding, and a rotor, including at least a rotor core and multiple permanent magnets. Multiple wire receiving grooves are disposed on the stator core. The permanent magnets are disposed on the rotor core. The ratio between the number of teeth of the wire receiving grooves and that of the permanent magnets is 3:2. Every two or three of the permanent magnets form a group of permanent magnets. A gap is disposed between adjacent groups of permanent magnets. The groups of permanent magnets are circumferentially distributed. Magnetic polarities of the permanent magnet are alternatively distributed in a N phase and a S phase. Difference in an electric angle between centers of polarities of adjacent permanent magnets in one group is between 150 degrees and 170 degrees.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: September 19, 2017
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR MANUFACTURING CO., LTD.
    Inventor: Mingpan Pan
  • Patent number: 9509187
    Abstract: Exemplary embodiments relate to a hollow-cylindrical coreless winding for an electric motor. The winding includes a plurality of single coils which are distributed across the circumference of the winding, wherein each single coil includes a plurality of turns which are spirally wound around a winding axis which is perpendicular to an axis of the winding. Successive single coils overlap in a roof tile manner. The winding includes at least two phase windings, each of the phase windings consisting of several ones of the single coils. The phase windings are offset with respect to each other in the circumferential direction of the hollow-cylindrical winding, so that the single coils of a first phase winding are disposed in the circumferential direction of the hollow-cylindrical winding between the single coils of a second phase winding. Each of the phase windings is wound from a continuous wire.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: November 29, 2016
    Assignee: MAXON MOTOR AG
    Inventors: Franz-Xaver Fölmli, Jens Schulze, Raniero Pittini
  • Patent number: 9444291
    Abstract: An electromagnetic drive mechanism (10) comprises a rotor (50) configured to rotate within a stator (30). The rotor (50) and stator (30) have multiple poles (56, 36), wherein each pole comprises a radial inner portion (564, 362) and a radial outer portion (562, 364). The radial inner portions (564, 362) and radial outer portions (562, 364) of the rotor (50) and stator (30) have different heights, forming a step (566, 366) between the radial inner and outer portions of the rotor (50) and stator (30). This configuration allows for overlapping radial surfaces in addition to overlapping axial surfaces during operation of the drive mechanism (10), thereby increasing the total overlap area and thus the reluctance torque, and potentially improving response speed while allowing for a more compact device (10).
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: September 13, 2016
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Yue Li, Jinyun Gan, Chuiyou Zhou
  • Patent number: 9404532
    Abstract: A superconductor-magnet bearing system can include a first bearing portion and a second bearing portion. One of the first and second bearing portions can be at least partially composed of a high-temperature superconductor (HTS) and another can be at least partially composed of a magnet. The first bearing portion can be disposed at least partially within an opening of the second bearing portion with a gap between the first and second portions. A magnetic bearing portion can include a plurality of rings disposed next to one another. An HTS bearing portion can include a magnet. The bearing portions can be biased toward an alignment with one another. One bearing portion can rotate relative to another bearing portion.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: August 2, 2016
    Inventor: BenMaan I. Jawdat
  • Patent number: 9321466
    Abstract: Force control system. The system includes a first pair of permanent magnets for providing a normal force on the wheel of a robot adapted for n-pipe inspections. A second pair of magnets is provided with opposite polarity so that a rotor containing magnets may be rotated with a minimum of torque required and therefore with a minimum of energy expended.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: April 26, 2016
    Assignees: Massachusetts Institute of Technology, King Fahd University of Petroleum and Minerals
    Inventors: Changrak Choi, Dimitrios Chatzigeorgiou, Rached Ben-Mansour, Kamal Youcef-Toumi
  • Patent number: 9287740
    Abstract: A pole shoe arrangement for a rotor or a stator of an electrical machine having an air gap between the stator and the rotor is disclosed. The pole shoe arrangement has a pole shoe element having an inner end and an outer end opposing the inner end. The inner end lies opposite the air gap when the pole shoe element is in an assembled state. The pole shoe element has a receiving surface for receiving a permanent magnet between the inner end and the outer end. The pole shoe arrangement has a guiding facility to guide the permanent magnet in a radial direction from the outer end to the inner end and to limit a movement of the permanent magnet at right angles to the radial direction.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: March 15, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Silvio Semmer, Xavier Tourde, Adriana Cristina Urda
  • Patent number: 9234436
    Abstract: A generator system uses compressed air as a power source and utilizes an electromagnetic auxiliary power unit. The generator system includes an engine (1), a multiple-column power distributor (2), a generator system (4), a controller system (6), an intake speed control valve (23), a high pressure gas tank (13), a constant pressure tank (16), an electronic control unit ECO (29), an electromagnetic auxiliary power unit (1000), a power distributor (1100) and an end gas recycle loop. The end gas recycle loop includes an air compressor (7), a condenser (11), an end gas recycle tank (9), an electro-drive turbine unidirectional suction pump (19) and an end gas muffler (22).
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: January 12, 2016
    Assignee: BEIJING XIANGTIAN HUACHUANG AERODYNAMIC FORCE TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITED
    Inventors: Dengrong Zhou, Jian Zhou
  • Patent number: 9184649
    Abstract: An electrical machine comprising: a first stator member (16) having a field magnet (22); a second stator member (18) forming an armature, the second stator member (18) being spaced from the first stator member (16); and a pair of contra-rotatable rotors (12a, 12b) disposed between the first and second stator members (16, 18); wherein at least a portion (14) of each of the rotors (12a, 12b) is magnetisable so as to transmit magnetic flux between the field magnet (22) and the armature.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: November 10, 2015
    Assignee: ROLLS-ROYCE PLC
    Inventor: John R. Webster
  • Patent number: 9088190
    Abstract: Electrical machine rotors and electrical machines are disclosed. The electrical machine rotors may include a shaft, a pair of permanent magnets arranged to form a magnetic pole on the rotor, a pole iron, and a pair of opposed inter-pole irons. The pole iron may retain the pair of magnets against the inter-pole irons and relative to the shaft. The electrical machine rotors may be assembled into electrical machines that include the rotor and a stator that includes a stator iron and at least one coil. In some examples, the shaft may be hollow, nonmagnetic, fiber-reinforced, and/or fabricated at least partially from a composite material.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 21, 2015
    Assignee: ABB Research Ltd.
    Inventor: Darren D. Tremelling
  • Publication number: 20150122235
    Abstract: Teeth-shaped portions 11b of a magnet 11 are formed in such a way that a part of the plane of projection of each of the teeth-shaped portions protrudes in a circumferential direction with respect to that of one of teeth 8b and 9b which is viewed from an axial direction of a first stator core 8 and a second stator core 9.
    Type: Application
    Filed: August 24, 2012
    Publication date: May 7, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideaki Arita, Takashi Goto
  • Publication number: 20150115749
    Abstract: A magnetic component having intermixed first and second regions, and a method of preparing that magnetic component are disclosed. The first region includes a magnetic phase and the second region includes a non-magnetic phase. The method includes mechanically masking pre-selected sections of a surface portion of the component by using a nitrogen stop-off material and heat-treating the component in a nitrogen-rich atmosphere at a temperature greater than about 900° C. Both the first and second regions are substantially free of carbon, or contain only limited amounts of carbon; and the second region includes greater than about 0.1 weight % of nitrogen.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: General Electric Company
    Inventors: Laura Cerully Dial, Richard DiDomizio, Francis Johnson
  • Publication number: 20150108855
    Abstract: A rotary electric machine includes a stator having an open slot configuration and a plurality of stator poles with a coil positioned about each stator pole. Each coil has a plurality of electrically conductive wires defining a group of wires and the group of wires is wrapped generally around a stator pole to define a plurality of turns. At least a portion of the group of wires is twisted, and the portion of the group of wires has between approximately 1 and 5 twists per turn. A method of fabricating a stator assembly is also disclosed.
    Type: Application
    Filed: December 30, 2014
    Publication date: April 23, 2015
    Applicant: CATERPILLAR INC.
    Inventor: Rodwan T. Adra
  • Publication number: 20150091397
    Abstract: A spintronic generator that provides electrical power with the motive force of natural electron spin. The utilization of natural electron spin can be enhanced with carefully matched materials, weights, and magnetic waveforms which provide precise pulsed frequencies in resonance with the materials. This resonance of the magnetic pulses provides clean abundant power. A utilization of the Zero Point Energy results in a local environment temperature drop which can be one of the sources of motive force. The harvesting of electricity can be in standard induction pick up coils controlled by direct current motor controllers using an LRC tank circuit.
    Type: Application
    Filed: August 30, 2014
    Publication date: April 2, 2015
    Inventor: KIRK MILLER
  • Publication number: 20150084451
    Abstract: An improved hybrid drive apparatus with a switched reluctance hub motor. The switched reluctance motor eliminates any drag caused by the existing magnetic fields of the motors used in the prior art by turning off the magnetic fields when not being used. It also is cleaner and more efficient to operate, as any magnetic road dust or debris attracted during operation is dropped or repelled when the magnetic fields are turned off. An improved switched reluctance motor may be used, with a stator ring and rotor ring designed so that the low reluctance flux path does not pass through the full diameter of the rotor or rotor bars.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 26, 2015
    Inventor: CHARLES HAMPTON PERRY
  • Publication number: 20150084450
    Abstract: This rotating electric machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.
    Type: Application
    Filed: June 9, 2011
    Publication date: March 26, 2015
    Applicants: KANAZAWA INSTITUTE OF TECHNOLOGY, TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Toshihiro Tsuda, Mitsuhiro Kawamura, Kazuki Noda, Tadashi Fukami, Kazuo Shima
  • Patent number: 8981604
    Abstract: The invention provides an active element for an electromagnetic machine, the element comprising an alternating succession in a main direction of portions presenting a first magnetic property and of portions presenting a second magnetic property, wherein the element includes a non-magnetic covering 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: Grant
    Filed: June 28, 2007
    Date of Patent: March 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Nicolas Ziegler, Daniel Matt
  • Publication number: 20150069863
    Abstract: A motor rotor assembly that includes multiple motor rotor sections and a rotor bar that extends through the motor rotor sections, such that the rotor bar and the motor rotor sections are configured such that the rotor sections are step-skewed, or continuously skewed, from each other. The assembly may be used in an IPM or Synchronous Reluctance motor; and, the motor rotor sections may be of solid core or laminations. Various assembly components, IPM and Synchronous Reluctance motors, and methods of construction/assembly are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 12, 2015
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Francesco Papini, Alexander Felix Fiseni, Mohamed Osama
  • Patent number: 8968042
    Abstract: A propulsion device for a marine vessel, the propulsion device comprising an electrical machine with integral magnetic gearing, which comprises three members, namely a first or inner rotor comprising a first plurality of permanent magnets, a second rotor in the form of a plurality of ferromagnetic pole pieces, and a stator which is associated with a plurality of 3-phase windings and to the periphery of which a plurality of second permanent magnets are fixed. The magnetic pole piece rotor is connected to a drive shaft provided with a propulsion means for providing propulsion to the marine vessel. The first or inner rotor is free to rotate about the drive shaft. The pole pieces of the second rotor are arranged to magnetically couple the permanent magnets of the first or inner rotor to the second permanent magnets on the stator.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: March 3, 2015
    Assignee: Magnomatics Limited
    Inventors: Stuart Calverley, David Powell
  • Publication number: 20150048697
    Abstract: A reluctance rotor of a dynamoelectric rotary machine has an even number of poles constructed of a material having structural magnetic anisotropy. The magnetic anisotropy of the material is characterized by a first magnetic resistance, a magnetic permeability of ?r>20 and a saturation polarization of >1T in a first spatial direction, and by a second magnetic resistance which is greater than the first magnetic resistance with a magnetic permeability of ?r<1.6 in spatial directions perpendicular to the first spatial direction.
    Type: Application
    Filed: August 15, 2014
    Publication date: February 19, 2015
    Inventor: Rolf Vollmer
  • Publication number: 20150042182
    Abstract: An electrical machine comprising: a first component having a first surface; a second component having a second surface, the first and second components being mounted such that the first surface is constrained to be movable in a cyclical path relative to the second surface; and a coil arranged to induce a magnetic field in one of the surfaces so as to, in at least some configurations of the machine, form a magnetic circuit through that surface; the machine being configured so that: a) the first component and the second component can magnetically interact with each other by virtue of magnetic flux through the first and second surfaces; and b) during at least part of the cyclical path the reluctance of the magnetic circuit is changed by relative motion of the first and second surfaces, that change in reluctance being predominantly due to a component of relative motion of the first and second surfaces in a direction parallel to the shortest distance between the first and second surfaces.
    Type: Application
    Filed: May 31, 2012
    Publication date: February 12, 2015
    Applicant: MCLAREN AUTOMOTIVE LIMITED
    Inventor: Anthony Richard Glover
  • Publication number: 20150035389
    Abstract: A stator of a switched reluctance motor includes a stator core part, stator coiling parts, stator salient parts, and pairs of permanent magnets. The stator coiling parts protrude inwardly from the stator core part and have coils wound on an external side thereof. The stator salient parts protrude inwardly from the stator core part and are disposed between the stator coiling parts. Each pair of the permanent magnets is inserted into each of the stator coiling parts and magnetized in the same direction as a direction of a magnetic field generated by the excitation of the coils. This stator has an electromagnetic structure designed to prevent the reversal of a magnetic field generated by the excited coils. The output of the motor is enhanced by inserting the permanent magnets so as to be magnetized in the same direction as a direction of a magnetic field generated by the excited coils.
    Type: Application
    Filed: September 23, 2013
    Publication date: February 5, 2015
    Applicant: University of Ulsan Foundation For Industry Cooperation
    Inventors: Cheewoo LEE, Jin HUR, Jeongjong LEE, Sehyun RHYU, Jungmoo SEO, Youngkyoun KIM, Insoung JUNG
  • Publication number: 20150035390
    Abstract: A rotating electrical machine has a rotor composed of laminations which are mounted on a shaft in an embodiment. The portion of the laminations adjacent the shaft has one or more slots, so designed as to increase the contact force between the lamination and the shaft as the speed of the rotor rises. This allows the laminations to be assembled to the shaft with a smaller interference fit yet retain a contact force at high speeds. The laminations may be assembled to the shaft with a suitable adhesive.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 5, 2015
    Inventors: Steven Paul Randall, Phillip George Dickinson
  • Publication number: 20150022033
    Abstract: The present disclosure relates to rotating electric machines which may be used for industrial applications, to a method for manufacturing a rotor of a synchronous reluctance motor, a rotor of a synchronous reluctance motor, and a synchronous reluctance motor. A rotor of a synchronous reluctance motor according to the present disclosure has a cylindrical rotor body part casted from a superparamagnetic material, and ferromagnetic flux guides arranged inside the casted cylindrical rotor body part. The flux guides are arranged to go through from one side of the outer circumference of the cylindrical rotor part to the other side of the outer circumference of the cylindrical rotor part in the direction of the direct axis of the synchronous reluctance motor.
    Type: Application
    Filed: October 2, 2014
    Publication date: January 22, 2015
    Inventors: Jouni Ikäheimo, Jere Kolehmainen
  • Publication number: 20150015093
    Abstract: A rotor for an electrical machine, in particular synchronous reluctance machine, is provided. The rotor is formed as a cylindrical structure having a magnetically soft element formed with an even number of salient magnetic poles openings for forming magnetic flux barriers. The openings are at least partially filled with a diamagnetic and/or paramagnetic medium and the diamagnetic and/or paramagnetic medium may axially and tangentially fix the magnetically soft element relative to the rotor. A method for producing such a rotor and apparatus using the rotor, including a reluctance motor, in particular a synchronous reluctance motor, that uses the rotor are provided.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 15, 2015
    Inventors: Daniel Gontermann, Jochen Schaab, Joachim Schullerer
  • Patent number: 8901798
    Abstract: A two-phase switched reluctance machine is provided using discontinuous core structures as the stator for low-cost, high-performance drives. This discontinuous stator core structure contains short flux paths and maximum overlap between the rotor poles and stator poles in the stator discontinuous core structures, regardless of the rotor position. Example configurations of such core structure include E-core, L-core and I-core configurations. Using less steel and magnet wire than in conventional SRM designs results in cost savings of stator material and winding material. Efficiency of this novel SRM is improved because of shorter flux paths resulting in reduction of core losses and decreased phase resistance resulting in reduction of copper losses. Two-phase simultaneous excitation of the novel SRM can reduce torque ripple during commutation as compared with existing two-phase SRMs.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: December 2, 2014
    Assignee: Regal Beloit America, Inc.
    Inventors: Krishnan Ramu, Nimai Lobo, Cheewoo Lee
  • Publication number: 20140346904
    Abstract: Disclosed herein is a switched reluctance motor comprising: a rotor having a shaft disposed at a central portion thereof and having salient poles formed at an outer circumference thereof; a stator having the rotor rotatably installed therein while forming a gap and having salient poles facing the salient poles of the rotor; and an extraction pressure decreasing unit separating the rotor and the stator from a mold, wherein the rotor and the stator are made of a soft magnet composite (SMC).
    Type: Application
    Filed: May 16, 2014
    Publication date: November 27, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Hee Soo YOON, Han Kyung Bae, Sung Tai Jung, Sung Jun Leem, Sang Jong Lee, Joon Sik Shin
  • Patent number: 8896163
    Abstract: A miniature electric motor (1) with an outer diameter (DA) that is smaller than or equal to 6 mm, has a hollow cylindrical stator (2) with stator coils (8) and a magnetic rotor (4) rotatably arranged around a rotational axis (16) in the stator (2) by means of a rotor shaft (10). The stator coils (8) can be energized in order to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor (4). A sensor chip (20) having at least one magnetic field sensor (22) is arranged in such a manner in an area axially adjacent to a front face of the magnetic rotor (4) located within a plane that is vertical to the rotational axis (16) that the magnetic field sensor (22) is impinged in such a way by the magnetic field that the rotational position of the rotor can be evaluated.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 25, 2014
    Assignee: Dr. Fritz Faulhaber GmbH & Co. KG
    Inventor: Herbert Wallner
  • Patent number: 8878373
    Abstract: A variable electrical generator (20) is operable to convert mechanical motion to electrical power. The generator (20) includes at least a stator element (60) and a rotor element (50) including coils (320) and magnets (90). The generator (20) includes a configuration of modules (80) including the coils (320) for generating wavelets (30) in response to the coils (320) interacting magnetically with the magnets (90), and a control arrangement (70) for combining the wavelets (30) for generating a composite synthesized power output (10) from the generator (20). A method of maintaining a variable generator (20) includes steps of: (a) determining operating status of modules (80) of the generator (20); (b) unplugging and replacing one or more defective modules (80) as identified in step (a).
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: November 4, 2014
    Assignee: Adaptive Generators AS
    Inventor: Kent Thoresen
  • Patent number: 8866350
    Abstract: An electromagnetic engine including a plurality of pistons and a plurality of corresponding electromagnets. The pistons are each connected to a crankshaft and fabricated of a ferrous material. The electromagnets are spaced from the pistons in alignment therewith. An electrical power source is provided to power the electromagnets, and a control assembly is provided to control the sequence of energizing the electromagnets, so that by energizing the electromagnets, the pistons will be pulled toward the electromagnets in response to a timely applied electromagnetic field. The force imparted on the piston is transmitted by the rod to the crankshaft, which provides power via an output shaft for desired uses.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: October 21, 2014
    Assignee: Magtricity, LLC
    Inventor: Jeffery D. Baird
  • Publication number: 20140265652
    Abstract: The present invention relates to an improved electric machine which, when operating in motor mode, produces rotational torque without using alternating magnetic polarity, but rather magnetic axial flux that utilizes coils arranged in a dipolar manner around an axial plane. In a preferred embodiment of the invention, the use of energy is significantly enhanced therein by injecting the energy harvested from the collapsing fields of electromagnetic drive components, and then directing said energy from said primary-drive coils of the machine into an isolated circuit which is thereafter introduced as a transient secondary process to power secondary-drive coils of the machine in order to increase the overall efficiency of the machine.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Timm A. Vanderelli, Rodney A. Carter
  • Patent number: 8810099
    Abstract: A power magnetic planetary gear set uses stator of a motor to provide electrically generated magnetic sections. The electrically generated magnetic sections are variable under the excitation control of coils and driver so that either the outer stator or the sun stator of the magnetic planetary gear set may be stationary and still provide self-revolutionary magnetic forces toward the planet gears disposed therebetween. The planet gears are also mounted on planet arms so as to revolve on their own axes and have orbital revolution with respect to the sun stator.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: August 19, 2014
    Inventor: Cheng-Chi Huang
  • Patent number: 8810347
    Abstract: A method of activating an electric machine having a stator, and a rotor which rotates about an axis with respect to the stator; the stator having a plurality of stator segments arranged about the axis; the rotor having modules made of magnetizable material and arranged about the axis; and the method including the steps of connecting the rotor to the stator by means of a bearing; and magnetizing the modules of magnetizable material when the rotor is connected to the stator.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: August 19, 2014
    Assignee: Wilic S.AR.L
    Inventors: Thomas Kaessner, Alessandro Fasolo
  • Patent number: 8797023
    Abstract: Provided is a coercive-force specifying apparatus capable of creating a demagnetization curve for each divisional area of a coercive-force distributed magnet without breaking the coercive-force distributed magnet and of specifying an average coercive force for each divisional area precisely. A coercive force specifying apparatus of the present invention includes: a yoke including an insertion space into which a coercive-force distributed magnet is to be inserted; a magnetizing coil; a search coil that detects a magnetization change when the magnetic field is applied to the coercive-force distributed magnet; and a tracer that creates a demagnetization curve on a basis of a voltage value generated due to the magnetization change. The end face is provided with two or more loop-shaped thread grooves bored therein, the search coil being provided in each thread groove.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: August 5, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masafumi Suzuki, Tomonari Kogure, Mayumi Nakanishi