Permanent Magnet Machines Patents (Class 310/152)
  • Patent number: 11242230
    Abstract: A mine explosion-isolating hoisting device with a built-in type permanent magnet motor includes a spindle fixed on the ground; a permanent magnet motor stator fixed on the spindle; a drum rotating relative to the spindle, the drum surrounding the spindle circumferentially; and a permanent magnet motor external rotor fixed by a spoke plate and rotating relative to the spindle; the drum is connected to the permanent magnet motor external rotor via an isolating disc; and a radial distance between an outer circumferential surface of the permanent magnet motor external rotor and an inner wall of the drum is greater than a preset value.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: February 8, 2022
    Assignees: TAIYUAN UNIVERSITY OF TECHNOLOGY, Guiyang Plateau Machinery Company Limited
    Inventors: Ziming Kou, Zhensheng Wang, Juan Wu, Deling Xie, Yandong Wang, Yinru Bai, Keliang Zhu, Waiwen Zhang, Li'nan Zhang, Lipeng Zhu
  • Patent number: 11205941
    Abstract: Methods for tuning properties of electric machines are disclosed. A method for reducing core loss in an electric machine includes punching a plurality of laminations from one or more electrical steel sheets that results in one or more cut edges. The method further includes assembling the laminations into a core such that an outer perimeter surface of the core is defined by the cut edges. The method further includes peening the outer perimeter surface to remove residual stresses.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: December 21, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Leyi Zhu, Feng Liang, Michael W. Degner
  • Patent number: 11165316
    Abstract: A method for manufacturing a rotor including a rotor core and a permanent magnet, the rotor core having a magnet hole, and the permanent magnet being inserted in the magnet hole and fixed to the rotor core with an adhesive, including the steps of: applying the adhesive, inserting the permanent magnet into the magnet hole of the rotor core, volatilizing the diluting solvent, expanding the expanding agent, and fixing the permanent magnet to the rotor core.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: November 2, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Tetsuya Matsubara, Motoki Kori, Akira Takasu, Takamasa Kondo
  • Patent number: 11081264
    Abstract: A high-performance permanent magnet is provided. A permanent magnet expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t-. The magnet comprises a metal structure including a cell phase having a Th2Zn17 crystal phase, and a Cu-rich phase provided to divide the cell phase and having a Cu concentration higher than that of the Th2Zn17 crystal phase. An Fe concentration of the Th2Zn17 crystal phase is not less than 30 atomic % nor more than 45 atomic %. An average length of the Cu-rich phase is not less than 30 nm nor more than 250 nm.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: August 3, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Naoyuki Sanada
  • Patent number: 11018606
    Abstract: Low cost linear Hall Effect sensors are used for determining motor shaft positions and generating voltages proportional to the motor shaft positions. The voltages from the linear Hall Effect sensors are compared to a triangle waveform and PWM signals are generated therefrom. A constant current source and constant current sink are used in the triangle waveform generator. The voltages from the linear Hall Effect sensors are adjusted to change the PWM duty cycles used to startup and vary the speed of the motor. Comparators compare the voltages from the Hall Effect sensors and product the PWM signals having duty cycles proportional to the voltage drive requirements of the motor.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: May 25, 2021
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Ward R. Brown, Howard Hendricks
  • Patent number: 11017928
    Abstract: In a magnet, an insulating layer is fixed to an upper surface of the magnet provided with the insulating layer, but is not fixed to a lower surface of the magnet above the insulating layer. Therefore, even when the magnet expands or contracts due to a temperature change, stress is less likely to occur at an interface between the insulating layer provided on the upper surface of the magnet and the magnet above the insulating layer.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 25, 2021
    Assignee: TDK CORPORATION
    Inventors: Nobuo Takagi, Motohisa Murata, Koji Mitake
  • Patent number: 11018536
    Abstract: An electromagnetic rotating motor system that comprise of a grooved wheel with one or more permanent magnets tangentially embedded in a horse-shoe pattern within the groove around the wheel rim with similar poles pointing in the same direction and wherein induction coils or electromagnets are positioned to fit tangentially between the permanent magnet(s) in the groove with the pole axis of the electromagnet parallel to that of the permanent magnets and with the coiling and powering made such that it generates magnetic poles that are similarly aligned to the poles of the permanent magnets such that when current is passed through the coil, the poles of the electromagnet and the permanent magnet repel each other forcing the wheel holding the magnets to rotate away from the coil.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: May 25, 2021
    Inventor: Jude Igwemezie
  • Patent number: 10998800
    Abstract: The invention relates to a method of manufacturing a rotor for an electric machine, wherein the rotor is composed of at least one electric sheet wherein at least one electric sheet is thermally treated regionally to directly modify its magnetic permeability in the treated region.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: May 4, 2021
    Assignee: RHEINISCH-WESTFÄLISCHE TECHNISCHE HOCHSCHULE (RWTH) AACHEN
    Inventors: Tobias Lange, Rik W. De Doncker, Mareike Schenk, Stefan Koschik
  • Patent number: 10978942
    Abstract: A magnetically geared apparatus that includes a first rotor and a stator. The stator can include windings and a first plurality of permanent magnets, where the first plurality of permanent magnets are located between the windings and the first rotor. The stator can also include un-magnetized magnetisable material between circumferentially juxtaposed permanent magnets of the first plurality of permanent magnets.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: April 13, 2021
    Assignee: Magnomatics Limited
    Inventors: David Powell, Gregg Wilson, Ferran Garcia Daras, Radu-Stefan Dragan
  • Patent number: 10943716
    Abstract: A high-performance permanent magnet is provided. A permanent magnet expressed by a composition formula: (R1-xAx)pFeqMrCutCo100-p-r-t. The magnet comprises a metal structure including a plurality of crystal grains which constitutes a main phase having a Th2Zn17 crystal phase, An Fe concentration of each of the crystal grains is 28 atomic % or more. A concentration difference of the element A among the crystal grains is not less than 0.2 atomic % nor more than 3.0 atomic %.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: March 9, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Naoyuki Sanada
  • Patent number: 10931174
    Abstract: Disclosed herein are a flux shield and a generator including the same and, more particularly, a flux shield including split structures and a generator including the same.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: February 23, 2021
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Daeil Song
  • Patent number: 10923254
    Abstract: A permanent magnet expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t. The magnet comprises a metallic structure including crystal grains which constitutes a main phase having a Th2Zn17 crystal phase. An average value of Fe concentrations in the crystal grains of 20 or more is 28 atomic percent or more and an average value of R element concentrations in the crystal grains of 20 or more is 10 atomic percent or more.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: February 16, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Masaya Hagiwara, Tsuyoshi Kobayashi, Tadahiko Kobayashi
  • Patent number: 10867732
    Abstract: This invention provides for a rotary electric machine that includes a rotor having a plurality of permanent magnets arranged in the circumferential direction, and in which the leakage of magnetic flux can be suppressed with a simple structure; and a rare-earth permanent magnet-forming sintered compact for forming rare-earth permanent magnets to be used in said rotary electric machine.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 15, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Makoto Fujihara, Kenichi Fujikawa, Shoichiro Saito
  • Patent number: 10778062
    Abstract: The present invention is an electrical machine comprising a stator and a rotor (10), with rotor being formed with a rotor body (20) from a stack of laminations (14) placed on a rotor shaft (12). According to the invention, the rotor comprises at least one cavity (38) for receiving at least one balance weight (48) for the dynamic balancing of the said rotor.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: September 15, 2020
    Assignees: IFP ENERGIES NOUVELLES, MAVEL S.R.L.
    Inventors: Julien Boisson, Wissam Dib, Rinato Biglino, Davide Bettoni
  • Patent number: 10770208
    Abstract: A high performance permanent magnet is provided. The permanent magnet includes a composition represented by a composition formula: RpFeqMrCutCo100-p-q-r-t, and a metallic structure including cell phases having a Th2Zn17 crystal phase and Cu-rich phases having higher Cu concentration than the cell phases. An average diameter of the cell phases is 220 nm or less, and in a numeric value range from a minimum diameter to a maximum diameter of the cell phases, a ratio of a number of cell phases having a diameter in a numeric value range of less than upper 20% from the maximum diameter is 20% or less of all the cell phases.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: September 8, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Keiko Okamoto, Masaya Hagiwara, Tsuyoshi Kobayashi, Masaki Endo, Tadahiko Kobayashi, Naoyuki Sanada
  • Patent number: 10749385
    Abstract: An AC electric machine that includes a dual magnetic phase material ring is disclosed. The AC electric machine includes a stator assembly and a rotor assembly positioned within the stator assembly and configured to rotate relative thereto, the rotor assembly comprising a rotor core including a stack of rotor laminations that collectively form the rotor core, the rotor core including a plurality of rotor poles separated by gaps therebetween. The AC electric machine also includes a dual magnetic phase material ring positioned about the stack of rotor laminations, the dual magnetic phase material ring comprising a first ring portion comprising a magnetic portion and a second ring portion comprising a non-magnetic portion.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: August 18, 2020
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Patel Bhageerath Reddy, Min Zou, Ayman Mohamed Fawzi El-Refaie, Francis Johnson
  • Patent number: 10693334
    Abstract: A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. The armature windings are configured by a first winding and at least one second winding. The field winding passes over the permanent magnet. The second windings each have a part embedded between a coil end of the field winding and teeth around which the field winding is around.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: June 23, 2020
    Assignees: DAIKIN INDUSTRIES, LTD., NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Yoshinari Asano, Toshinari Kondou, Yoshihito Sanga, Takashi Kosaka
  • Patent number: 10650947
    Abstract: The invention provides a high-performance permanent magnet. The permanent magnet has a composition that is expressed by a composition formula RpFeqMrCutCo100-p-q-r-t, where R is at least one element selected from a rare earth element, M is at least one element selected from the group consisting of Zr, Ti, and Hf, p is a number satisfying 10.8?p?12.5 atomic percent, q is a number satisfying 25?q?40 atomic percent, r is a number satisfying 0.88?r?4.5 atomic percent, and t is a number satisfying 3.5?t?13.5 atomic percent. The permanent magnet also has a metallic structure that includes a main phase having a Th2Zn17 crystal phase, and a Cu-M rich phase having a higher Cu concentration and a higher M concentration than the main phase.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: May 12, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Keiko Okamoto, Masaya Hagiwara, Tsuyoshi Kobayashi, Masaki Endo, Tadahiko Kobayashi, Naoyuki Sanada
  • Patent number: 10644564
    Abstract: A magnetic motor comprising a timing controller and at least one cylinder having a piston, an upper cylinder head, and a lower cylinder head is disclosed. The piston, upper cylinder head, and lower cylinder head each include a set of one or more magnets characterized by a common pattern. The one or more magnets in the piston, the upper cylinder head, and lower cylinder head comprise poles oriented parallel to the longitudinal axis of the cylinder. The piston oscillates linearly in the cylinder but does not rotate, while the upper and lower cylinder heads rotate in place but do not move linearly. The timing controller is configured to vary the phase between longitudinal oscillation of the piston and angular oscillation of the upper and lower cylinder heads to optimally drive the piston up and down in the cylinder.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: May 5, 2020
    Inventor: Mark Herman Harper
  • Patent number: 10593448
    Abstract: In one embodiment, a permanent magnet includes a sintered compact having a composition expressed by a composition formula: Rp1Feq1Mr1Cus1Co100-p1-q1-r1-s1 (R is a rare-earth element, M is at least one element selected from Zr, Ti, and Hf, 10?p1?13.3 at %, 25?q1?40.0 at %, 0.88?r1?5.4 at %, and 3.5?s1?13.5 at %). The sintered compact includes crystal grains and a Cu-rich phase. The crystal grains are composed of a main phase including a Th2Zn17 crystal phase. The Cu-rich phase has a composition with a high Cu concentration and an average thickness of 0.05 ?m or more and 2 ?m or less.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: March 17, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Keiko Okamoto, Masaya Hagiwara, Tsuyoshi Kobayashi, Masaki Endo, Tadahiko Kobayashi
  • Patent number: 10483831
    Abstract: The present invention relates to a permanent magnet applying motor which uses a repulsive force and an attractive force, which act between different permanent magnets, and a repulsive force or an attractive force, which acts between a permanent magnet and an electromagnet. The permanent magnet applying motor includes a first rotating plate and a second rotating plate, a rotating shaft, a plurality of rotors, each rotor having a permanent magnet and a penetrating shaft. A plurality of planetary gears paired with the plurality of rotors and a center gear engaged with all of the plurality of planetary gears. The permanent magnet applying motor includes a rotating plate support including a first support and a second support, a stator support including a third support and a fourth support, one or more deadlock point detecting sensors on the rotating plate support; and an electromagnet portions on the stator support.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: November 19, 2019
    Assignee: PHOENIX INVENT, INC.
    Inventors: Hack Churl You, Ro Bin You
  • Patent number: 10468924
    Abstract: A rotor for a flux-barrier-type reluctance motor having a plurality of poles formed in a circumferential direction includes a plurality of slits provided for each pole, a permanent magnet partially inserted into the slits in such a manner that magnetic poles of the permanent magnet are directed substantially orthogonal to the slit, a slit for a movable element disposed radially inside the permanent magnet disposed at an innermost position in a radial direction, and a movable element made of a magnetic material and inserted into the cavity, the movable element being capable of moving in the slit for the movable element in the circumferential direction. A radially inner side of the innermost slit into which the permanent magnet is inserted and radially outer and inner sides of both the slit for the movable element and the movable element are in a concentric circular-arc shape.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: November 5, 2019
    Assignee: OKUMA CORPORATION
    Inventor: Takanori Yokochi
  • Patent number: 10386034
    Abstract: A rotary electromagnetic actuator for car lamp low beam and high beam light switching device, comprises a shell (401), a rotor (402), a stator (403), a rotating shaft (405) and an end cover (407). The stator is fixedly installed in the shell to form a pair of arc-shaped stator magnetic poles (409) on which electric excitation can be applied; the rotor, as an arc-shaped permanent magnet, is fixed on the rotating shaft and is located in a magnetic field space of the arc-shaped magnetic poles of the stator; and the rotor is matched with the arc-shaped stator magnetic poles to form a closed magnetic circuit with an air gap (410); two swing bars (406) are connected to two ends of the rotating shaft respectively.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: August 20, 2019
    Assignee: HASCO VISION TECHNOLOGY CO., LTD.
    Inventors: Shijie Yu, Minghua Zhu, Tianzhong Guo, Yujie Chen
  • Patent number: 10312835
    Abstract: Various implementations of the invention correspond to an improved vortex flux generator.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: June 4, 2019
    Assignee: Silicon Turbine Systems, Inc.
    Inventor: Richard Adams
  • Patent number: 10253676
    Abstract: A cooling fan assembly operable for cooling a radiator of a vehicle includes a brushless motor and a fan element having a plurality of fan blades. The brushless motor includes a stator and a rotor. The fan element is attached at the rotor such that rotation of the rotor by the motor imparts rotation of the fan blades to enhance air flow at the radiator of the vehicle. The rotor is a molded polymeric rotor formed by injection molding a thermoplastic material. During injection molding of the rotor, a plurality of magnetic elements are at least partially overmolded by the thermoplastic material to establish the magnetic elements at the molded polymeric rotor. The rotor may have a bell-like shape, and the magnetic elements may be disposed at an inside facing surface of the rotor.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: April 9, 2019
    Assignee: MAGNA POWERTRAIN BAD HOMBURG GMBH
    Inventors: Axel Gossling, Michael Ciop
  • Patent number: 10224770
    Abstract: The present invention relates to a rotor assembly including a yoke member having a cylindrical shape with a hole through which a rotating shaft passes, a plurality of magnet groups attached to an outer circumferential surface of the yoke member, and a first molding unit formed along an inner circumferential surface of the yoke member and having an arrangement hole of the rotating shaft at a center part thereof.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 5, 2019
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Yong Chul Kim
  • Patent number: 10186914
    Abstract: A multi-degree-of-freedom electromagnetic machine includes a stator, an armature, and a control. The stator includes a first stator conductor, a second stator conductor, and a third stator conductor. The armature is disposed adjacent to, and is movable relative to, the stator. The armature includes an armature conductor and a plurality of magnets, where each magnet has at least one of its magnetic poles facing the surface. The control is coupled to the first, second, and third stator conductors, and is configured to supply direct current (DC) to the first, second, and third stator conductors, and to selectively amplitude modulate the DC supplied to one or more of the first, second, and third stator conductors, to thereby electromagnetically couple the armature conductor to the one or more first, second, and third stator conductors.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: January 22, 2019
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventor: Pablo Bandera
  • Patent number: 10164494
    Abstract: The invention relates to an electric machine comprising a stator (1) and a rotor (2) movable relative to said stator. Said stator comprises two multi-stranded, concentrated windings (A1, B1, C1, A2, B2, C2) which are placed in respective slots of the stator (1). While the first winding (A1, B1, C1) comprises six coils, the second winding (A2, B2, C2) is designed to have twelve coils. The number of turns (Nw1) of the coils of the first winding is different from the number of turns (Nw2) of the coils of the second winding.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: December 25, 2018
    Assignee: FEAAM GMBH
    Inventor: Gurakuq Dajaku
  • Patent number: 10164486
    Abstract: The present disclosure relates to a mono- or polyphase electric motor including a stator carrying at least three coils and consisting of 12×N straight teeth extending radially, N being an integer greater than or equal to 1, and of an equal peak divergence alpha, measured at their end from the center of the motor, and a rotor exhibiting P pairs of magnetized poles such that P=5+2×R, P being a non-multiple of three, R being an integer greater than or equal to 0, alpha lying between 360°(12×N)/3 and 360°(12×N)/2.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: December 25, 2018
    Assignee: Moving Magnet Technologies (MMT)
    Inventors: Arnaud Hyppias, Stéphane Tavernier, Stéphane Biwersi
  • Patent number: 10135369
    Abstract: Low cost linear Hall Effect sensors are used for determining motor shaft positions and generating voltages proportional to the motor shaft positions. The voltages from the linear Hall Effect sensors are compared to a triangle waveform and PWM signals are generated therefrom. A constant current source and constant current sink are used in the triangle waveform generator. The voltages from the linear Hall Effect sensors are adjusted to change the PWM duty cycles used to startup and vary the speed of the motor. Comparators compare the voltages from the Hall Effect sensors and product the PWM signals having duty cycles proportional to the voltage drive requirements of the motor.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: November 20, 2018
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Ward R. Brown, Howard Hendricks
  • Patent number: 10069448
    Abstract: A heating, ventilation, and air conditioning (HVAC) system actuator including a stator magnet and a rotor magnet. The rotor magnet turns an axle connected to an airflow door such that rotation of the axle moves the door and generates waveforms. The number of waveforms generated corresponds to how much the axle has rotated. The stator magnet is magnetized to a saturated state, thereby providing the waveforms with a consistent shape that is consistently detectable by a climate control pulse count module.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: September 4, 2018
    Assignee: DENSO International America, Inc.
    Inventors: Katsumi Nishikawa, Young Kwon Lee, Matt Porter
  • Patent number: 10069390
    Abstract: A synchronous reluctance rotating electric machine of an embodiment has a rotor iron core provided with a plurality of air gap layers, and a stator. The rotor iron core has a plurality of band-shaped magnetic path layers, and at least one or more bridges that bridge across each of the air gaps adjacent to each other among the plurality of air gap layers. The bridges of the air gaps adjacent to each other are disposed on different straight lines.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: September 4, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Daisuke Misu, Katsutoku Takeuchi, Makoto Matsushita, Yutaka Hashiba, Norio Takahashi, Kazuaki Yuuki, Toshio Hasebe
  • Patent number: 10050481
    Abstract: Provided is a method for manufacturing a permanent magnet type motor in which a permanent magnet is incorporated into a rotor cores stack, the method including a process of forming the rotor core stack, by combining a plurality of core sheets having a magnet insertion hole with a core sheet not having the magnet insertion hole, and disposing the core sheet not having the magnet insertion hole in one end of a stacking direction; a process of injecting a low-viscosity adhesive into the magnet insertion hole in which one end is blocked by the core sheets; and a process of bonding and fixing the permanent magnet by inserting the permanent magnet into the magnet insertion hole into which the low-viscosity adhesive is injected.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: August 14, 2018
    Assignee: SANYO DENKI CO., LTD.
    Inventors: Toshihito Miyashita, Manabu Horiuchi
  • Patent number: 10008893
    Abstract: In an interior permanent magnet motor, each of permanent magnets has a radially-inner magnet contour surface, a radially-outer magnet contour surface, and a pair of side-end magnet contour surfaces. Each of magnet insertion holes has a radially-inner insertion hole contour surface, a radially-outer insertion hole contour surface, and a pair of side-end insertion hole contour surfaces. The radially-outer magnet contour surface and the radially-outer insertion hole contour surface are each formed by a first arc surface. The radially-inner magnet contour surface and the radially-inner insertion hole contour surface are each formed by a second arc surface and at least one straight surface configured to suppress movement of the permanent magnet along the magnet insertion hole having an arc shape.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: June 26, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Kazuchika Tsuchida, Kazuhiko Baba
  • Patent number: 9948167
    Abstract: A rotor (10) of a motor includes a rotor core (11) and a plurality of magnets (14a, 14b) which are arranged at a circumferential surface of the rotor core or at the inside of the rotor core, the length of a magnet of the plurality of magnets in the axial direction of the rotor core determined in accordance with the residual magnetic flux density of the magnet. The axial direction length of the magnet is preferably determined by multiplying a reference axial direction length of the magnet with the residual magnetic flux density of the magnet and dividing this by a reference residual magnetic flux density of the magnet.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: April 17, 2018
    Assignee: FANUC CORPORATION
    Inventors: Hidetoshi Uematsu, Takeshi Tamaki
  • Patent number: 9866077
    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: Grant
    Filed: January 31, 2013
    Date of Patent: January 9, 2018
    Assignee: KSB Aktiengesellschaft
    Inventors: Daniel Gontermann, Jochen Schaab, Joachim Schullerer
  • Patent number: 9803998
    Abstract: An absolute position sensor having a detector with a plurality of Wiegand wire sensors that each have a pair of Hall sensors bracketing or straddling the Wiegand wire used by a processor in interpolating relative ratios of signals from the bracketing Hall sensors in not only providing increased fine position determination between magnets but also providing coarse position count increment or decrement verification. Such an absolute position sensor provides increased fine position determination accuracy while also enhancing increment and/or decrement error prevention and/or correction during position sensor operation.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: October 31, 2017
    Assignee: Joral LLC
    Inventor: Carl D. Schrubbe
  • Patent number: 9800105
    Abstract: A rotor core includes a plurality of first electromagnetic steel plates that are stacked in an axial direction and a plurality of second electromagnetic steel plates that are stacked in an axial direction at both ends of the electromagnetic steel plate group thereof. The first electromagnetic steel plates are provided therein with magnet insertion holes and first flux barriers. The second electromagnetic steel plates are provided therein with the magnet insertion holes, second flux barriers, and projections that regulate the positions of the magnets. The second electromagnetic steel plates are stacked at at least one of the axial direction ends of the electromagnetic steel plate group including the plurality of first electromagnetic steel plates and are provided at a position overhanging the axial direction end of a stator core.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: October 24, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Naohiro Oketani, Koji Yabe, Kazuhiko Baba
  • Patent number: 9773592
    Abstract: A permanent magnet of an embodiment includes: a composition represented by a composition formula: R(FepMqCurCo1-p-q-r)z, where R is at least one element selected from rare-earth elements, M is at least one element selected from Zr, Ti, and Hf, and relations of 0.3?p?0.4, 0.01?q?0.05, 0.01?r?0.1, and 7?z?8.5 (atomic ratio) are satisfied; and a structure including a cell phase having a Th2Zn17 crystal phase, and a cell wall phase existing to surround the cell phase. An average magnetization of the cell wall phase is 0.2 T or less.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: September 26, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinya Sakurada, Yosuke Horiuchi, Keiko Okamoto, Masaya Hagiwara, Tsuyoshi Kobayashi, Masaki Endo, Tadahiko Kobayashi
  • Patent number: 9748805
    Abstract: The purpose of the present invention is to provide a electric generator which has a simple structure while sufficiently suppressing cogging torque. A electric generator is constituted by a rotor section comprising a plurality of protrusions which is arranged linearly with constant pitch at mutually separated positions sandwiching permanent magnets, and a stator section which has a stator member comprising stator yokes, permanent magnets facing the permanent magnets, and protrusions which protrude closer to the rotor section than the permanent magnets and are arranged linearly with constant pitch at mutually separated positions sandwiching the permanent magnets, the stator member being configured such that the protrusions and the protrusions are shifted from each other by a half pitch between adjoining stator members. Further, the rotor section-side protrusions may be shifted by a half pitch instead of the stator section-side protrusions.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: August 29, 2017
    Assignees: T.K Leverage Co., Ltd.
    Inventors: Sanshiro Ogino, Takaitsu Kobayashi
  • Patent number: 9729041
    Abstract: Provided are a magnetic rotation accelerator and a power generation system. The magnetic rotation accelerator includes: a shaft; a fixed plate through which the shaft penetrates and on which a plurality of first magnetic units are disposed; and a rotary plate through which the shaft penetrates, which faces the fixed plate and on which a plurality of second magnetic units are disposed, wherein a repulsive force is generated between the first magnetic units and the second magnetic units, the first magnetic units form a first row and a second row around the shaft, and the second magnetic units form a third row and a fourth row around the shaft, wherein central axes of the first magnetic units of the first row are in phase with central axes of the first magnetic units of the second row, and central axes of the second magnetic units of the third row are out of phase with central axes of the second magnetic units of the fourth row.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: August 8, 2017
    Inventors: Se Myung Suk, Young Jun Suk
  • Patent number: 9705367
    Abstract: The purpose of the present invention is to provide a electric generator which has a simple structure while sufficiently suppressing cogging torque. A electric generator is constituted by a rotor section comprising a plurality of protrusions which is arranged linearly with constant pitch at mutually separated positions sandwiching permanent magnets, and a stator section which has a stator member comprising stator yokes, permanent magnets facing the permanent magnets, and protrusions which protrude closer to the rotor section than the permanent magnets and are arranged linearly with constant pitch at mutually separated positions sandwiching the permanent magnets, the stator member being configured such that the protrusions and the protrusions are shifted from each other by a half pitch between adjoining stator members. Further, the rotor section-side protrusions may be shifted by a half pitch instead of the stator section-side protrusions.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: July 11, 2017
    Assignees: T.K Leverage Co., Ltd.
    Inventors: Sanshiro Ogino, Takaitsu Kobayashi
  • Patent number: 9653198
    Abstract: In one embodiment, a permanent magnet includes a composition represented by RpFeqMrCusCo100-p-q-r-s (R: rare earth element, M: at least one element selected from Zr, Ti and Hf, 10?p?13.5 atomic %, 28?q?40 atomic %, 0.88?r?7.2 atomic %, 4?s?13.5 atomic %), and a metallic structure in which a composition region having an Fe concentration of 28 mol % or more is a main phase. A Cu concentration in the main phase is 5 mol % or more.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: May 16, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Tsuyoshi Kobayashi, Keiko Okamoto, Masaya Hagiwara
  • Patent number: 9583246
    Abstract: Fixtureless self-alignment and orientation of components during an assembly process, and self-aligning/self-orienting components for assembly. Self-alignment and self-orientation are provided by integrating complementary spatially-modulated magnetic arrays into components requiring alignment and/or orientation during an assembly process. In addition to providing self-alignment/self-orientation, the spatially-modulated magnetic arrays also provide selective component placement and/or assembly order. Final assembly can involve permanent mechanical or adhesive fasteners.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 28, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Roland J. Menassa, Nilesh D. Mankame
  • Patent number: 9584056
    Abstract: A polyphasic multi-coil generator includes a driveshaft, at least first and second rotors rigidly mounted on the driveshaft so as to simultaneously synchronously rotate with rotation of the driveshaft, and at least one stator sandwiched between the first and second rotors. The stator has an aperture through which the driveshaft is rotatably journalled. A stator array on the stator has an equally circumferentially spaced-apart array of electrically conductive coils mounted to the stator in a first angular orientation about the driveshaft. The rotors and the stator lie in substantially parallel planes. The first and second rotors have, respectively, first and second rotor arrays.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: February 28, 2017
    Assignee: EXRO TECHNOLOGIES INC.
    Inventor: Jonathan Ritchey
  • Patent number: 9577502
    Abstract: A transverse flux motor (10) includes a housing (20), a stator (50), and a rotor (30) external to the stator (50) and installed onto the housing. The stator (50) includes a stator sub-assembly including at least one pair of stator core elements (52), each having multiple stator pole teeth (56) circumferentially offset from pole teeth of the other stator core element in the pair. The rotor (30) includes a rotor body (32) made of a single piece part or multiple rotor body laminas (36). The rotor body (32) includes multiple magnetic flux retention features (40) for positioning first magnets (34). Two adjacent magnetic flux retention features (48) define a second magnet retention feature (47) for positioning a second magnet (45) that form a substantially U-shape together with two neighboring first magnets with the same magnetic poles facing each other.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: February 21, 2017
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Yue Li, Jinyun Gan, Chuiyou Zhou, Yanfei Liao, Xiaomei Yuan
  • Patent number: 9577500
    Abstract: A rotary magnetic motor having a rotor configured to magnetically interact with a stator to obtain rotation of the rotor about its axis. The stator has a magnetic structure of a generally involute shape around the axis of rotation. The stator magnetic structure has a plurality of permanent magnets defining a first magnetic face of a first polarity. The rotor has a magnetic structure of a generally circular shape around the axis and inside the stator magnetic structure. The rotor has a plurality of permanent magnets defining a second magnetic face of a second polarity. The magnetic attraction and repulsing of the aligned magnetic faces with a progressively narrowing radial gap, resulting from the involute shape, rotate the rotor inside the stator. A magnetic pulse mechanism discharges a magnetic pulse of the first polarity to provide an additional pull to continue the rotation of the rotor through its full cycle.
    Type: Grant
    Filed: March 4, 2012
    Date of Patent: February 21, 2017
    Inventor: Arnold Jones
  • Patent number: 9502165
    Abstract: A permanent magnet includes: a composition expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t (R is at least one element selected from rare-earth elements, M is at least one element selected from Zr, Ti, and Hf, 10.5?p?12.5 at %, 23?q?40 at %, 0.88?r?4.5 at %, 4.5?t?10.7 at %); and a metal structure containing a Th2Zn17 crystal phase and a Cu-rich phase having a Cu concentration higher than that of the Th2Zn17 crystal phase. In a cross section including a c-axis of the Th2Zn17 crystal phase, a number of intersections of the Cu-rich phases existing in an area of 1 ?m square is 10 or more.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: November 22, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Keiko Okamoto, Masaya Hagiwara, Tsuyoshi Kobayashi, Masaki Endo, Tadahiko Kobayashi
  • Patent number: 9502164
    Abstract: A permanent magnet includes: a composition expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t (R is at least one element selected from rare-earth elements, M is at least one element selected from Zr, Ti, and Hf, 10.5?p?12.5 at %, 23?q?40 at %, 0.88?r?4.5 at %, 4.5?t?10.7 at %); and a metal structure containing a cell phase having a Th2Zn17 crystal phase, a cell wall phase, an M-rich platelet phase formed vertically to a c-axis of the Th2Zn17 crystal phase, and a Cu-rich platelet phase formed along the M-rich platelet phase.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: November 22, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Keiko Okamoto, Masaya Hagiwara, Tsuyoshi Kobayashi, Masaki Endo, Tadahiko Kobayashi
  • Patent number: 9490666
    Abstract: A magnetic energy converter is an apparatus using the repelling energy fields of magnets to provide continuous motion. The apparatus includes a first axis, a second axis, an at least one motion generating mechanism, an idler gear train, and a platform. Each motion generating mechanism is used to harness the repelling energy fields of magnets and includes a first disk, a first magnet, a second disk, and a second magnet. Each magnet is peripherally mounted onto their respective disk, which is axially mounted to their corresponding axis. The first magnet and the second magnet have synchronized orbits so that their repelling energy fields interact with each other to produce continuous motion. The platform is used as a base for the other components. The idler gear train transfers rotational motion from the first axis to the second axis at a 1:1 ratio and reverses the direction of the rotational motion.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: November 8, 2016
    Inventor: Thomas Alexander Zummo