Synchronous Patents (Class 310/162)
  • Patent number: 10848029
    Abstract: The purpose of the present invention is to control the lamination thickness of the laminated core of an axial gap rotating electric machine. The axial gap rotating electric machine is provided with: a stator comprising a plurality of core members arranged circularly about the rotational axis center, said core members each comprising a columnar-laminated core having a flux surface in a rotation axis direction, a coil disposed on the outer perimeter of the core in the radial direction, and a substantially cylindrical bobbin disposed between the core and the coil; and at least one rotor facing the flux surface with a predetermined gap interposed therebetween in the rotation axis direction. The bobbin has an inner cylinder facing the outer perimeter of the core in the radial direction, and at least part of the inner diameter of the inner cylinder becomes gradually smaller along the rotation axis direction and makes contact with the outer perimeter surface of the laminated core in the radial direction.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: November 24, 2020
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Jun Sakurai, Daisaku Takahashi, Toru Sakai, Katsuyuki Yamazaki, Shuuichi Takahashi
  • Patent number: 10778052
    Abstract: A synchronous reluctance type rotary electric machine of an embodiment includes a shaft and a rotor core. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. Then, when a center in a circumferential direction of one pole is a pole center, a hollow part closest to the shaft among the plurality of hollow parts is a first hollow part, a hollow part positioned next to the first hollow part is a second hollow part, and a hollow part positioned on a side opposite to the first hollow part with respect to the second hollow part is a third hollow part, a width W1 between the first hollow part and the second hollow part on the pole center and a width W2 between the second hollow part and the third hollow part on the pole center are set to satisfy W1?W2.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: September 15, 2020
    Assignees: Toshiba Industrial Products and Systems Corporation, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Masaaki Matsumoto, Takashi Araki, Makoto Matsushita, Katsutoku Takeuchi, Toshio Hasebe
  • Patent number: 10765482
    Abstract: An in vivo apparatus includes a flexible shaft having a proximal end, a distal end, and a length sufficient to access a patient's renal artery relative to a percutaneous access location. An energy guide apparatus is provided at the distal end of the shaft and dimensioned for deployment within the renal artery. An ex vivo apparatus includes an arrangement configured to localize the energy guide apparatus within the renal artery, and an energy source configured to direct ablative energy to target tissue located a predetermined distance from the localized energy guide apparatus. The target tissue includes perivascular renal nerve tissue adjacent the renal artery.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: September 8, 2020
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Roger Hastings
  • Patent number: 10720801
    Abstract: The invention relates to an electric machine comprising a stator and a rotor moveable relative to the stator. The stator has slots for accommodating electrical windings, wherein teeth of the stator are formed between adjacent slots. During operation of the machine, an operating wave of the magnetomotive force is different from a fundamental wave of the magnetic flux. The stator comprises at least one recess which is arranged in the tooth region and extends substantially in the radial direction.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: July 21, 2020
    Assignee: FEAAM GmbH
    Inventor: Gurakuq Dajaku
  • Patent number: 10686343
    Abstract: A stack of a rotor comprises a plurality of stack elements which include material of first magnetic conductance. The rotor includes sectorial sections distributed round a rotational axis of the rotor. Each of the stack elements has an aperture of second magnetic conductance in each of the sectorial sections. Outer ends of the apertures are located at a rim of the stack elements or at a bridge of the rim. The apertures form channels through the stack in a direction of a rotational axis of the rotor. At least two of the apertures of a common channel of the channels have the outer ends at different radial distances from the rotational axis of the rotor.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: June 16, 2020
    Assignee: ABB Schweiz AG
    Inventors: Jouni Ikäheimo, Tero Känsäkangas, Jere Kolehmainen
  • Patent number: 10651695
    Abstract: A disc rotor motor is demonstrated, having at least one stator that has at least one electrical stator winding and stator teeth, which have a tooth neck composed of a soft magnetic powder composite, and having at least one disc-shaped rotor, which has permanent magnetic poles composed exclusively of ferrite magnets at least for producing torque, with the rotor and stator oriented parallel to each other and spaced apart from each other by an axial gap. In order to find an optimum between costs, weight, and overall size as well as power and torque density, the invention proposes that the stator teeth each end in a tooth end that adjoins their tooth neck and is composed of a soft magnetic powdered composite, which tooth end widens out in its cross-sectional area in comparison to the tooth neck.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: May 12, 2020
    Assignee: Miba Sinter Austria GmbH
    Inventors: Ralf Kobler, Dietmar Andessner, Christian Sandner
  • Patent number: 10615676
    Abstract: Various embodiments are described herein for switched reluctance machine configurations. In at least one embodiment, a switched reluctance machine configured according to the teachings herein comprises a stator including a predetermined number of salient stator poles (Ns), a rotor rotatably mounted with respect to the stator, with the rotor comprising a plurality of salient rotor poles, and a plurality of coils provided around the predetermined number of stator poles to form at least one phase of the switched reluctance machine, where the rotor poles and the stator poles are symmetrically disposed, and a number of rotor poles is related to 0? and a number of phases according to: i) (Ns/m)k ceil (mod(k,m)/m) number of phases, and ii) (Ns/m)k ceil (mod(k,m/2)/m/2) for an even number of phases, where m is the number of phases, and k is a configuration index based on Ns and m.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: April 7, 2020
    Assignee: Enedym Inc.
    Inventors: Berker Bilgin, Ali Emadi
  • Patent number: 10608481
    Abstract: A core of a transverse flux machine a stator pole. The stator pole includes a plurality of laminations, where laminations of the plurality of laminations are in a stacked configuration. Further, each of the plurality of laminations includes at least one of a magnetic region and a non-magnetic region, where individual shapes of magnetic regions of the plurality of laminations are such that the magnetic regions of the plurality of laminations at least a portion of a three-dimensional magnetic circuit.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: March 31, 2020
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Francesco Papini
  • Patent number: 10574103
    Abstract: This interior magnet rotary electric machine (1) is provided with a rotor (2) that has a rotor core (11) having two sets of permanent magnets (12, 13) embedded therein, and with a stator (3) that is disposed facing the rotor (2). The two sets of permanent magnets (12, 13) each comprise a pair of magnets (12a, 12b, 13a, 13b) of like polarity disposed adjacently along the circumferential direction of the rotor 2. In the rotor core (11), magnet embedding holes (11b), which accommodate the magnets (12a, 12b, 13a, 13b) of like polarity, are formed for each of the magnets of like polarity. The thickness (a), in the rotor (2) circumferential direction, of the portions (18) of the rotor core (11) between like poles is less than the thickness (b) of the portions (19) of the rotor core (11) between unlike poles.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: February 25, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Toshiaki Shimoda, Shingo Kasai
  • Patent number: 10574109
    Abstract: A wobble plate motor includes a wobble plate and a stator. The wobble plate is made of magnetically susceptible material and has a wobble axis. The stator includes a permanent magnet and a set of electromagnetic coils and has a stator axis. The wobble plate is configured to nutate around the stator with the wobble axis precessing around the stator axis. The wobble plate has a mobile point of closest approach with respect to the stator. The mobile point of closest approach moves around the stator axis as the wobble plate nutates. The permanent magnet and the set of electromagnetic coils are configured to create a magnetic field having a flux density between the stator and the wobble plate with a highest flux density at a mobile location ahead of the mobile point of closest approach in an angular direction around the stator axis as the wobble plate nutates.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: February 25, 2020
    Assignee: The Boeing Company
    Inventor: Robert J. Atmur
  • Patent number: 10541580
    Abstract: A rotor for an electrical machine includes a rotor core having a plurality of circumferentially spaced apart rotor poles. Windings are seated in gaps between circumferentially adjacent pairs of the rotor poles. A wedge secures the windings in each gap. The wedge includes a first member made of a first material and at least one second member made of a second material. The second material has a higher electrical conductivity than the first material. The wedge is configured to supply Q-axis damping. A pair of end plates is connected electrically to the at least one second member at opposing longitudinal ends thereof thereby completing a Q-axis winding circuit for each wedge.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: January 21, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Dhaval Patel, Andreas C. Koenig
  • Patent number: 10541574
    Abstract: A rotor for an electric machine, wherein the rotor comprises a plurality of stack elements and each of the stack elements includes material of first magnetic conductance. Each of the stack elements includes a plurality of sectorial sections distributed round a rotational axis of the rotor. Each of the sectorial sections includes one or more flux barriers. At least one of the one or more flux barriers has a difference associated with filing of an electrically conductive material of third magnetic conductance in different sectorial halves of a common sectorial section, the first magnetic conductance being larger than the third magnetic conductance.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: January 21, 2020
    Assignee: ABB Schweiz AG
    Inventors: Jere Kolehmainen, Tero Känsäkangas
  • Patent number: 10530199
    Abstract: A single phase permanent magnet motor includes a stator core, windings, and a permanent magnet rotor. The stator core includes an end portion and two spaced arm portions each including a connecting arm and a pole claw. Each pole claw has a long pole tip and a short pole tip, and forms a pole surface. The long pole tip of each pole claw corresponds to the short pole tip of the other pole claw with a slot opening formed there between. The slot opening causes the arc pole surface to be discontinued along a circumferential direction, and the arc pole surface is recessed inwardly to form a startup groove.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: January 7, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yue Li, Chui You Zhou, Yong Wang, Yong Li
  • Patent number: 10530232
    Abstract: A motor includes a magnet and a coil. ?2=[{(Br2?Br1)/Br1}/(T2?T1)]×100?0.11 and ?3=[{(Br3?Br1)/Br1}/(T3?T1)]×100?0.13 are satisfied. In the magnet, Br1 (mT) is a residual magnetic flux density at T1 (° C.), Br2 (mT) is a residual magnetic flux density at T2 (° C.), and Br3 (mT) is a residual magnetic flux density at T3 (° C.), and ?2 (%/° C.) is a temperature coefficient at a target temperature of T2 (° C.) with respect to a reference temperature of T1 (° C.), and ?3 (%/° C.) is a temperature coefficient at a target temperature of T3 (° C.) with respect to a reference temperature of T1 (° C.) in conditions of T1=20, T2=100, and T3=220.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: January 7, 2020
    Assignee: TDK CORPORATION
    Inventors: Eiji Kato, Makoto Iwasaki
  • Patent number: 10523101
    Abstract: A motor includes a magnet and a coil. ?2=[{(Br2?Br1)/Br1}/(T2?T1)]×100??0.10 and ?3=[{(Br3?Br1)/Br1}/(T3?T1)]×100??0.12 are satisfied. In the magnet, Br1 (mT) is a residual magnetic flux density at T1 (° C.), Br2 (mT) is a residual magnetic flux density at T2 (° C.), and Br3 (mT) is a residual magnetic flux density at T3 (° C.), and ?2 (%/° C.) is a temperature coefficient at a target temperature of T2 (° C.) with respect to a reference temperature of T1 (° C.), and ?3 (%/° C.) is a temperature coefficient at a target temperature of T3 (° C.) with respect to a reference temperature of T1 (° C.) in conditions of T1=23, T2=60, and T3=180.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: December 31, 2019
    Assignee: TDK CORPORATION
    Inventors: Makoto Iwasaki, Fumitaka Baba, Chikara Ishizaka
  • Patent number: 10434858
    Abstract: An electric power supply system configured to supply electric power to an electrical load device in accordance with a current requirement. The electric power supply system includes an engine configured to output rotational power, a generator configured to receive the rotational power and to supply a current to the electrical load device. The generator includes a rotor, and a stator including a winding and a stator core with the winding wound thereon, a magnetic circuit for the winding passing through the stator core, and a supply current adjustment device configured to adjust magnetic resistance of the magnetic circuit for the winding, to thereby change an inductance of the winding to adjust the supplied current. The electric power supply system further includes a control device configured to control the engine to adjust the output rotational power and to control the supply current adjustment device to adjust the inductance of the winding.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: October 8, 2019
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Haruyoshi Hino
  • Patent number: 10361598
    Abstract: According to one embodiment, a rotating electrical machine includes an annular winding, L (L is an arbitrary integer) stator magnetic poles, and L rotor magnetic poles having the same polarity. The L stator magnetic poles are disposed apart from each other in a rotational direction and facing the winding. The L rotor magnetic poles have the same polarity as each other. The L rotor magnetic poles are disposed apart from each other in the rotational direction and configured to face the L stator magnetic poles If an order of the fundamental wave component of a torque pulsation is N, M (M?L) distances between centers of the adjacent poles between pole centers in one set of either the L stator magnetic poles or the L rotor magnetic poles are combinations of (?, ?+?1/M, ?+?1×2/M, . . . , and ?+1×(M?1)/M), and ?1 satisfies the relationship (180°/N)<?1<(540°/N) in the notation of electrical angle.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: July 23, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuhito Ueda, Hiroshi Takahashi
  • Patent number: 10320316
    Abstract: A regulating device for a brushless excitation system for supplying at least one excitation coil of a rotor of a synchronous machine with excitation current, having a detection device to detect a strength of a magnetic flux; a regulating unit to generate an auxiliary excitation DC current supplied to the main excitation machine by rectifying an auxiliary excitation three-phase current, and to regulate the current strength of the auxiliary excitation DC current such that a magnetic flux generated between the rotor and the stator of the main excitation machine is kept constant independently of the current strength of the excitation current; and an adjusting unit rotationally fixed to a rotor shaft of the synchronous machine to generate the excitation current by rectifying an excitation three-phase voltage generated by the main excitation machine and to regulate the current strength of the excitation current supplied to the rotor of the synchronous machine.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: June 11, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Olaf Michelsson, Marcus Banda, Martin Hiller
  • Patent number: 10312784
    Abstract: Aspects of the invention relate to a switched reluctance motor and the reduction of motor torque output ripple by inclusion of flux barriers. The inclusion of flux barriers running parallel to the motor shaft axis located in the appropriate places in either or the rotor and stator can modify the torque profile output of the motor markedly reducing potential vibration problems in a vehicle driveline.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: June 4, 2019
    Assignee: Jaguar Land Rover Limited
    Inventors: Xavier Vinamata, Alexandros Michaelides, Philip Topping
  • Patent number: 10284063
    Abstract: A plurality of flux barriers in each of flux barrier groups include arcuate portions formed in a polygonal region. The arcuate center of the arcuate portions in each of the flux barrier groups is set to the circumferential center point of the flux barrier group on the outer peripheral edge of a rotor. When regions of the rotor interposed between two flux barriers that are adjacent to each other in the flux barrier groups are defined as ribs, and portions of the rotor that are close to the outer periphery of the rotor in the regions of the rotor interposed between flux barrier groups that are adjacent to each other are defined as connecting portions, the ratio of the width of the connecting portions to the width of the ribs is 0.53 or more and 0.8 or less.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: May 7, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Mingyu Tong
  • Patent number: 10270301
    Abstract: A treble quantum dot strip array comprising a red, a green and a blue photon transparent stationary colloidal epoxy suspension volume strip segment each including a plurality of red photon emitting quantum dots responsive to an electrical signal applied thereon to provide a photon emission in the red wavelength and a uV attenuating filter, wherein each of said red, blue and green segments are disposed to form a parallel treble array of segments are disposed to provide a photon path from a photon source through said uV attenuating filter. Alternate embodiments provide a quantum dot colour electrically conductive strip to emit a selected colour in response to a corresponding electric said signal applied thereacross, and including a COB (chip on board) LED (Light Emitting Diode) array apparatus.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: April 23, 2019
    Inventor: David Deak, Sr.
  • Patent number: 10199886
    Abstract: A single phase brushless motor and a power tool are provided. The single phase brushless motor includes a stator and a rotor. The stator includes a stator core and windings wound around the stator core. The stator core includes a yoke and at least two teeth. The tooth includes a tooth body and a tooth tip. The tooth tip includes first and second pole shoes. The two pole shoes of each tooth are symmetrical about a center line of the tooth body. Each tooth defines a positioning groove facing the rotor between the two pole shoes. Pole shoes of adjacent two of the at least two teeth are spaced apart by a slot opening. A width of the positioning groove is greater than a width of the slot opening. The peak value of the cogging torque of the motor is increased, and the motor has a large startup torque.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: February 5, 2019
    Assignee: JOHNSON ELECTRICS S.A.
    Inventors: Yue Li, Tao Zhang, Chui You Zhou, Jie Chai, Jun Jie Chu, Xiao Bing Zuo, Yong Wang, Yong Li
  • Patent number: 10193425
    Abstract: A stepping motor includes a one-piece stator integrally molded by using a Fe—Ni alloy plate through machining, a rotor accommodating through-hole, and in which a magnetic path is disposed around the rotor accommodating through-hole. A rotor is rotatably arranged inside the rotor accommodating through-hole. A magnetic core is connected to the stator, and a coil is wound on the magnetic core. A Cr-diffusion region having a molten-solidified portion of Cr is diffused in the Fe—Ni alloy stator in a portion of the magnetic path.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: January 29, 2019
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Kosuke Yamamoto, Shinji Kinoshita
  • Patent number: 10170970
    Abstract: A stepper motor includes: a rotor including a rotor core and a permanent magnet, the rotor core including a plurality of teeth; and a stator arranged around the rotor while being spaced apart from the rotor and including a plurality of magnetic pole teeth, the magnetic pole teeth including a plurality of teeth and projecting toward the rotor. A winding is wound around every other magnetic pole tooth. A phase of the teeth of the magnetic pole teeth with no winding therearound is shifted from a phase of the teeth of the other magnetic pole teeth.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: January 1, 2019
    Assignee: SANYO DENKI CO., LTD.
    Inventors: Yasushi Yoda, Kouji Nakatake, Masaaki Ohashi
  • Patent number: 10164554
    Abstract: Disclosed is a motor. The motor is electrically connected to a control module. The motor includes a stator and a rotor. The stator includes a first stator module and a second stator module. The first stator module is configured beside the second stator module. A mechanical phase converting line is defined as a center position between the first stator module and the second stator module. The rotor is configured around the stator. The first phase detector is configured at one side of the mechanical phase converting line, and the first phase detector and the first stator module are configured at the same side of the mechanical phase converting line.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: December 25, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chien-Lun Chu, Ching-Feng Lai
  • Patent number: 10148140
    Abstract: A motor includes a stator having a stator core, a first frame and a second frame, which are arranged on two axial sides of the stator core, a coupling member, which couples the first and second frames at a radially outer side of the stator while applying a holding load to the first and second frames in the axial direction, and a rotor, which is arranged at a radially inner side of the stator. The stator core includes a held portion that projects toward a radially outer side from a main circumferential portion of the stator core. The first and second frames hold, in between, at least the held portion of the stator core in the axial direction.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: December 4, 2018
    Assignee: DENSO CORPORATION
    Inventors: Takumi Suzuki, Yuuji Yamashita
  • Patent number: 10141799
    Abstract: The present invention relates to an outer-rotator-type switched reluctance motor that may provide a shortest magnetic path by configuring a magnetic circuit in stator salient poles and rotor salient poles with circumferential-directional slots formed in the stator salient poles and coils passing through the slots and wound along the circumferential direction of the stator core, may thus minimize magnetic loss in the cores to maximize use efficiency of magnetic energy, and may provide a sturdy structure while simplifying coil winding work.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: November 27, 2018
    Inventor: Young Chun Jeung
  • Patent number: 10110102
    Abstract: A single phase brushless motor includes a stator and a rotor. The stator includes a stator core and stator windings wound on the stator core. The stator core includes a yoke portion, and first and second pole portions extending inwardly from the yoke portion. An end surface of the first pole portion includes a first arc surface having a first groove. An end surface of the second pole portion includes a second arc surface having a second groove. The first and second arc surfaces are opposed to each other and define a receiving space therebetween. The rotor includes a rotary shaft and permanent magnetic poles fixed to the rotary shaft. The permanent magnetic poles are received in the receiving space. A substantially uniform gap is formed between the first arc surface and the second arc surface and the permanent magnetic poles.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 23, 2018
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Yue Li, Chui You Zhou, Gang Li, Yong Wang, Yong Li, Wei Zhang, Ming Chen, Jie Chai
  • Patent number: 10075050
    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: Grant
    Filed: September 16, 2014
    Date of Patent: September 11, 2018
    Inventor: Charles Hampton Perry
  • Patent number: 10033234
    Abstract: A motor includes a stator that generates a rotating magnetic field; a rotor supported rotatably by a shaft within the stator; an outermost peripheral permanent magnet that is a permanent magnet embedded inside the rotor in an arced shape forming a convexity at the inner surface of the rotor; and an inner permanent magnet that is a permanent magnet embedded at the inside of the rotor in parallel to the outermost peripheral permanent magnet. The arc angle of the permanent magnets is greater than 90°, the thickness at the center of both inner permanent magnets is thinner than the thickness at the center of the outermost peripheral permanent magnet, and the thickness at the ends of both inner permanent magnets is thicker than the thickness at the ends of the outermost peripheral permanent magnet.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: July 24, 2018
    Assignees: U-MHI PLATECH CO., LTD., MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Mikito Sasaki, Shinichi Isobe
  • Patent number: 10020714
    Abstract: The invention relates to a method of manufacturing a rotor for performing a magnetizing process of magnetizing a plurality of magnet materials that are assembled in a rotor core. A magnetization device is used which has a coil group configured of a plurality of coils that are disposed side by side in a manner that winding directions of adjacent coils are opposite to each other, the coil group is configured of sub coils at both ends and two or more main coils between the sub coils, and all of the coils are connected in series. Further, in the magnetizing process, a partial magnetization of magnetizing the magnet material among the plurality of magnet materials to which magnetic flux interlinking with two adjacent main coils is applied is performed a plurality of times, so as to magnetize all the plurality of magnet materials.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: July 10, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ichiro Okada, Hiroaki Urano, Katsuhiko Tatebe, Fumiki Tanahashi, Michitaka Hori
  • Patent number: 9945701
    Abstract: Actuator bracket having a sensor is disclosed. An example apparatus includes a bracket having a first side and a second side opposite the first side. The first side is to couple to a first surface of an actuator. The second side is to couple to a controller. The apparatus also includes a first sensor coupled to the first side of the bracket. When the bracket is coupled to the first surface of the actuator, the first sensor is adjacent the first surface to measure a characteristic of the first surface of the actuator.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: April 17, 2018
    Assignee: FISHER CONTROLS INTERNATIONAL LLC
    Inventors: Shannon Eugene Jelken, Mark Allen Rachuy, Benjamin Uriah Good
  • Patent number: 9941756
    Abstract: A rotor for an electric machine includes a rotor core having a plurality of rotor sheets (RS1), each of the plurality of rotor sheets including a plurality of flux guide sections, each of the plurality of flux guide sections having a plurality of flux paths and a plurality of flux barriers. The plurality of flux guide sections having a first flux guide section in which a first number of the plurality of flux barriers has a bridge interrupting the flux barrier, and a second flux guide section in which a second number of the plurality of flux barriers has a bridge interrupting the flux barrier. Each bridge is made of a material of high permeance, and the first number of the first flux guide section is different than the second number of the second flux guide section.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: April 10, 2018
    Assignee: ABB Schweiz AG
    Inventor: Jere Kolehmainen
  • Patent number: 9917481
    Abstract: There is described a synchronous reluctance machine having a plurality of poles and comprising a stator with a plurality of spaced slots and a rotor. The rotor has one direct axis and one quadrature axis for each pole and comprises a plurality of flux barriers, each extending to a circumference thereof at least one barrier point. Successive angular separations between barrier points around the circumference of the rotor increase or decrease when moving around half a pole pitch from an initial axis to an adjacent finishing axis, the initial axis being one of a direct axis or a quadrature axis and the finishing axis being the other of a direct axis and a quadrature axis. The increase or decrease in size may be governed by a systematic progressive series.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: March 13, 2018
    Assignee: TECHNELEC LTD
    Inventors: Charles Pollock, Helen Pollock
  • Patent number: 9869821
    Abstract: A 3D-scanning optical imaging probe which inhibits rotation unevenness of rotational sections, shaft run-out, friction, and rotation transmission delay by reducing the occurrence of torque loss and rotation transmission delay, and which is capable of obtaining 3D scans and observation images within a fixed frontal range. A substantially tubular catheter has, provided along substantially the same line therein: a fixed-side optical fiber; a first optical path conversion means which is rotationally driven by a first motor, and which rotates and emits a beam of light forwards and tilted at an angle with respect to a rotational axis; and a second optical path conversion means which, at a tip side of a rotation-side optical fiber rotationally driven by a second motor, tilts an optical path by a micro-angle with respect to the rotational axis, and rotates and emits the beam of light to irradiate the first optical path conversion means therewith.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: January 16, 2018
    Assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
    Inventors: Hiroshi Yamazaki, Eri Fukushima, Tomoyuki Kugo, Norikazu Sato, Takayuki Koshikawa, Chihiro Okamoto, Takafumi Asada
  • Patent number: 9853508
    Abstract: A synchronous reluctance motor includes: a rotor shaft; a rotor core fixed to the rotor shaft and on which a plurality of flux barriers are formed; a stator core on which a plurality of protruding stator teeth are formed; and multiphase armature windings of a plurality of poles wound around the plurality of stator teeth. The flux barriers include a plurality of first flux barriers formed to be spaced out in the circumferential direction from each other and extend in a radial direction, and a plurality of second flux barriers formed in each of circumferential angular regions sandwiched between the first flux barriers to form a curved surface convex toward the center of the rotation-axis and to spread and be spaced out in the circumferential direction from each other.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: December 26, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Syou Fukumoto, Koji Ooishi, Makoto Matsushita, Daisuke Misu, Katsutoku Takeuchi, Yutaka Hashiba, Norio Takahashi, Kazuaki Yuuki, Toshio Hasebe
  • Patent number: 9847698
    Abstract: Provided is an electric motor having improved overall cooling efficiency by enabling a coolant to flow around a stator and around and through a rotor in parallel for the stator and the rotor to allow the stator and the rotor to be cooled in parallel. In the electric motor, after an automatic transmission fluid flowing into a first coolant inflow port (10) passes through a shaft internal flow path and rotor internal flow paths (27), the automatic transmission fluid passes through a coolant exhaust port (20) to flow out of a housing (18). After the automatic transmission fluid flowing into a second coolant inflow port (11) passes through a clearance (31) between the housing (18) and a stator (17) and around coil ends (29) of stator coils (16), the automatic transmission fluid passes through the coolant exhaust port (20) to flow out of the housing (18).
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: December 19, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Manabu Yoshinori, Masaki Horii
  • Patent number: 9814444
    Abstract: Among other things, there is disclosed structure and methods for registering images obtained through internal (e.g. intravascular) ultrasound devices. Embodiments of a device with a rotating ultrasound beam is provided, with a wall of the device being anisotropic in ultrasound passage. As examples, a cable opaque to ultrasound is attached along the wall of the device, so that the ultrasound beam at the location of the cable is blocked, reflected or scattered. As another example, a thin film of metallic material is placed on or in the wall to allow a portion of the beam to be blocked or attenuated. The imaging system recognizes the changes to the signals made by the anisotropic wall, and registers successive images according to those changes.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: November 14, 2017
    Assignee: Muffin Incorporated
    Inventors: Neal E. Fearnot, Peter S. McKinnis, Sarah Robbins, Yun Zhou
  • Patent number: 9813006
    Abstract: A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; storing the self-inductance value and the first current value for each of the stator phases; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; storing the mutual inductance value and the second current value for each of the stator phases; estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: November 7, 2017
    Assignee: Software Motor Corporation
    Inventors: Mahesh Krishnamurthy, Trevor Creary
  • Patent number: 9793772
    Abstract: A stator for a rotating electric machine includes an annular stator core and a plurality of winding groups mounted on teeth of the stator core. Each of the winding groups is either a short-pitch winding group which consists of windings wound at a pitch shorter than 180° in electrical angle or a full-pitch winding group which consists of windings wound at a pitch equal to 180° in electrical angle. The winding groups include at least one short-pitch winding group pair which consists of two short-pitch winding groups that respectively belong to two different phases and are circumferentially adjacent to each other. The two short-pitch winding groups are arranged so as not to overlap each other in a radial direction of the stator core. There are no other winding groups interposed between the two short-pitch winding groups in the circumferential direction of the stator core.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: October 17, 2017
    Assignees: DENSO CORPORATION, ASMO CO., LTD.
    Inventors: Shinji Makita, Yasuhide Ito, Tomohiro Aoyama
  • Patent number: 9722517
    Abstract: Various embodiments are described herein for a system and method to eliminate mutual flux effect on rotor position estimation of switched reluctance motor (SRM) drives at rotating shaft conditions without a prior knowledge of mutual flux. Neglecting the magnetic saturation, the operation of conventional self-inductance estimation using phase current slope difference method can be classified into three modes: Mode I, II and III. At positive-current-slope and negative-current-slope sampling point of one phase, the sign of current slope of the other phase changes in Mode I and II, but does not change in Mode III. In one example embodiment, in order to operate the self-inductance estimation in Mode III, a variable-hysteresis-band current control method is proposed for the incoming phase and variable-sampling method is proposed for the outgoing phase.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: August 1, 2017
    Assignee: McMaster University
    Inventors: Jin Ye, Ali Emadi
  • Patent number: 9574870
    Abstract: A probe for a three-dimensional (3D) scanning optical imaging which prevents rotational irregularity, axial runout, friction, rotation transmission delays of a rotational part by reducing occurrences of rotation transmission delays, torque loss, and the like, and can perform scanning of a certain length in an axial direction and obtain a three-dimensional observation image, in a probe for OCT image diagnosis. A fixed side optical fiber that transmits light between a tip side and a rear side of a probe and is non-rotatably disposed, a first optical path conversion means that rotates to emit a light ray in a substantially radial direction, a rotation side optical fiber which is rotated by a motor, and a second optical path conversion means that rotates and emits light toward the first optical path conversion means are collinearly disposed. In this way, it is possible to obtain a high quality 3D observation image.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: February 21, 2017
    Assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
    Inventors: Hiroshi Yamazaki, Eri Fukushima, Norikazu Sato, Tomoyuki Kugou, Takafumi Asada
  • Patent number: 9553538
    Abstract: A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; storing the self-inductance value and the first current value for each of the stator phases; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; storing the mutual inductance value and the second current value for each of the stator phases; estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: January 24, 2017
    Assignee: Software Motor Corporation
    Inventors: Mahesh Krishnamurthy, Trevor Creary
  • Patent number: 9490673
    Abstract: A rotor includes S-pole and N-pole magnets which are arc-shaped in cross-section. Each pole has three magnets. Each magnet is embedded in the rotor in such a way that a convex side portion thereof faces center Or of the rotor. Distance Rs between center Os of circular arcs of S-pole magnets and center Or of the rotor is different from distance Rn between center On of circular arcs of N-pole magnets and center Or of the rotor (Rs?Rn). The ratio of the two distances is 0.92 (Rs/Rn=0.92). An outer peripheral section of an innermost-layer S-pole magnet is disposed in such a way as to protrude into an adjacent pole zone N1 or N2 from a pole zone S1 or S2.
    Type: Grant
    Filed: August 10, 2013
    Date of Patent: November 8, 2016
    Assignee: MITSUBA CORPORATION
    Inventors: Masayuki Okubo, Keisuke Mitsuoka, Masaru Watanabe
  • Patent number: 9484794
    Abstract: A hybrid induction motor includes an inductive rotor and an independently rotating permanent magnet rotor. The inductive rotor is a squirrel cage type rotor for induction motor operation at startup. The permanent magnet rotor is axially displaced and variably coupled to the inductive rotor (or to a motor load) through a clutch and is allowed to rotate independently of the inductive rotor at startup. The independently rotating permanent magnet rotor quickly reaches synchronous RPM at startup. As the inductive rotor approaches or reaches synchronous RPM, the coupling between the inductive rotor and the permanent magnet rotor increases until the two rotors are coupled the synchronous RPM and the motor transitions to efficient synchronous operation.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: November 1, 2016
    Inventor: Louis J. Finkle
  • Patent number: 9438151
    Abstract: A transverse flux machine includes a stator having a circular coil wound in a rotational direction and a rotor arranged to face the first ferromagnet across a gap. The stator has a plurality of first ferromagnets surrounding a part of the circular coil in the rotational direction separately. The rotor is rotatable about a center axis of the circular coil relative to the stator. The rotor has a plurality of second ferromagnets arranged in the rotational direction separately. A first member and a second member are inserted between adjacent ones of the second ferromagnets. The first member and the second member generate two magnetic fields opposite to each other in the circumference direction.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: September 6, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yasuhito Ueda
  • Patent number: 9425657
    Abstract: A reluctance motor system includes a reluctance motor having a stator and a rotor, and a driving circuit. The stator includes phase winding sets each of which includes two windings that are connected in series at a corresponding node. The driving circuit includes switching members each of which is coupled electrically to a respective phase winding set, and each of which includes a first switch, a second switch, a first flyback diode, and a second flyback diode. The driving circuit further includes damping capacitor sets each of which includes a first capacitor coupled between the node and a positive terminal of a DC power source, and a second capacitor coupled between the node and a negative terminal of the DC power source.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: August 23, 2016
    Inventors: Fu-Tzu Hsu, Mao-Ming Lin, Chin-Tseng Wu
  • Patent number: 9388808
    Abstract: A scroll compression device that is adaptable to a larger elimination capacity by using a balancer of magnetic material is provided. A scroll compression mechanism 11 for compressing refrigerant and a driving motor 13 that is connected to the scroll compression mechanism 11 through a driving shaft 15 and drives the scroll compression mechanism 11 are accommodated in a casing 3, the scroll compression mechanism 11 is supported in the casing by a main frame 21, a rotor 39 of the driving motor 13 is connected to the driving shaft 15, the driving shaft 15 is supported in the casing by a bearing plate 8, an upper balancer 63 of magnetic material is secured onto the shaft above the stator 37 of the driving shaft 15, a lower balancer 77 of non-magnetic material is secured to the lower end of the rotor 39, and an auxiliary balancer 64 of non-magnetic material is secured in the gap between the upper end of the rotor 39 and the upper balancer 63.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 12, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Satoshi Iitsuka, Tsutomu Kon, Kazuyoshi Sugimoto, Yoshihiko Nagase
  • Patent number: 9293955
    Abstract: In an excitation device for stators of generators for high-induction measurement, the greatest possible compensation of the reactive power requirement is achieved. Depending on the size and energy requirement of the generator, a number of individual excitation modules with a corresponding number of individual excitation windings are provided, wherein a minimum necessary total excitation current can be supplied by superimposing the individual currents of the excitation windings.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: March 22, 2016
    Assignee: ALSTOM TECHNOLOGY LTD
    Inventor: Max Hobelsberger
  • Patent number: RE46867
    Abstract: A rotor for a synchronous reluctance machine wherein a torque ripple behaviour of the machine is optimized by altering the geometry of insulating barriers of the rotor. A q-axis pitch angle is used as a design variable instead of setting its value equal to the rest of the rotor slot pitches or binding its value to the stator slot pitch. The resulting rotor has a non-regular slot pitch across the q-axis and substantially regular slot pitch otherwise. Synchronous reluctance machines that employ rotor discs and rotor assemblies in accordance with the present invention may exhibit low torque ripple without sacrificing high torque values.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: May 22, 2018
    Assignee: ABB Research Ltd.
    Inventor: Reza Rajabi Moghaddam