Induction Patents (Class 310/166)
  • Patent number: 11264925
    Abstract: An electric motor controller system for modulating requested motor torque via oscillating the instantaneous torque, including a bi-stable torque controller; a proportional-integral (PI) velocity controller a proportional-integral-differential (PID) position controller; and sinusoidal zero-velocity table mapping.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: March 1, 2022
    Inventors: Michael Leonardi, William Nicoloff
  • Patent number: 11223316
    Abstract: Methods and control apparatus for operating a three-phase electric motor are described, in which the motor windings are switched between Star and Delta connections depending on torque requirements, and in which the motor windings are switched to a braking mode when braking torque is required. The electromagnetic torque of the motor is monitored, and a command to switch from Star to Delta is given when the electromagnetic torque rises to reach or exceed a threshold.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 11, 2022
    Assignee: Power Drive Efficiency Ltd.
    Inventors: Igor Alexander Turevsky, Moshe Haim Naiman, Arthur Naiman
  • Patent number: 11221039
    Abstract: A bearing assembly is disclosed that includes a first component with a first bearing surface, and a second component with a second bearing surface. A fluid is disposed between the first bearing surface and the second bearing surface supporting the first bearing surface and the second bearing surface in a non-contact rotational relationship. The first bearing surface, or the second bearing surface, or both the first bearing surface and the second bearing surface include a surface layer with solid lubricant 2D nanoparticles in a matrix.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: January 11, 2022
    Inventors: Steven Poteet, David J. Grulke
  • Patent number: 11081931
    Abstract: An energy storage apparatus including a spherical rotating member having permanent magnets and uniquely-identifiable location-defining elements, a plurality of coils, a controller operably coupled to the plurality of coils, a power source, and a location sensing apparatus operable to detect the plurality of location-defining elements. The controller may compare time-sequential information from the location sensing apparatus to determine a rotational axis and a rotational speed of the rotating member, operate the coils to change the rotational axis speed of the rotating member, increase energy stored by the rotating member by increasing the rotational speed by operating the coils to generate magnetic fields that interact with the permanent magnets, and withdraw energy by operating the coils to generate magnetic fields that interact with the magnetic fields of the permanent magnets to produce induced current in the coils and directing the induced current to a power delivery location.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: August 3, 2021
    Assignee: Alluvionic, Inc.
    Inventor: Ricardo Romeu
  • Patent number: 11056949
    Abstract: Provided a rotating electrical machine including a rotor; a stator; and a fluid control mechanism has a first member and a second member, and is configured to create a flow of a fluid directed from one side toward the other side in an axial direction of the rotating shaft, on an outer periphery of the rotor. The first member has a portion at which the outside diameter increases gradually from the one side toward the other side, and is configured such that a shape of an outer circumferential surface is continuous with the shape of an outer circumferential surface of an end portion, in an axial direction, of the rotor. The second member is configured such that an inside diameter increases gradually from the one side toward the other side at a portion facing the portion of the first member at which the outside diameter increases gradually.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: July 6, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Takahiro Sadamitsu
  • Patent number: 10998778
    Abstract: Embodiments of a modular motor assembly are disclosed. In some embodiments, a motor comprises a plurality of modular magnetic units, where each of the modular magnetic units includes at least one rotor and at least one stator. The motor further comprises a plurality of structural segments each adapted to support a stator of a corresponding one of the modular magnetic units, where each of the structural segments interlocks with a next structural segment to form a stack. A method of manufacturing a motor includes arranging a selected number of modular magnetic units, coupling the selected number of modular magnetic units to a shaft, coupling the selected number of modular magnetic units to respective structural segments, and forming electrical connections to apply three-phase voltage to stator windings of the modular magnetic units.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: May 4, 2021
    Assignee: WISK AERO LLC
    Inventors: Geoffrey Alan Long, Justin Char, Robert Wayne Moore, Laura Weeks Shane, Diederik Marius
  • Patent number: 10992206
    Abstract: A field discharge resistor unit according to an embodiment of the present invention is a device coupled to a rotary shaft of a synchronous motor and connected to a coil wound on a rotor of the synchronous motor, to reduce a magnitude of an electric current flowing through the coil wound on the rotor, and comprises: a hub which has a receiving space therein and is coupled to the rotary shaft of the synchronous motor so that a rotary movement of the hub matches that of the shaft; and at least one conductor disk received in the receiving space of the hub and may function as a resistor when an electric current flows therethrough.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: April 27, 2021
    Assignee: Hyundai Electric & Energy Systems Co., Ltd.
    Inventors: Seung-Wook Jung, Moo-Jong Jeon, Je-Geun Oh, Chung-Man Jang
  • Patent number: 10951103
    Abstract: Embodiments involve rotors for axial flux induction rotating electric machines that use a soft magnetic composite for the rotor core. A first embodiment is directed to a rotor for a rotating electrical machine that transmits magnetic flux parallel to a shaft of the rotor. The rotor includes a rotor winding and a plurality of cores. The rotor winding consists of a solid piece of conductive material that comprises a plurality of cavities. Each core is placed in a respective cavity and comprises a highly resistive isotropic ferromagnetic powder.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: March 16, 2021
    Assignee: Maxxwell Motors, Inc.
    Inventors: Michael Cunnyngham, Maksym Pryimak
  • Patent number: 10819183
    Abstract: A spherical resolver system includes a spherical body, an outer body, a first sensor coil, a second sensor coil, a third sensor coil, a first primary coil, and a circuit. The spherical body has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry, and the first, second, and third axes of symmetry are disposed perpendicular to each other. The circuit is coupled to the first primary coil and is operable to supply a first alternating current (AC) reference signal (Vr1) to the first primary coil, whereby a first sensor signal (Vx) is selectively induced in the first sensor coil, second sensor signal (Vy) is selectively induced in the second sensor coil, and a third sensor signal (Vz) is selectively induced in the third sensor coil, and supplies one or more signals representative of the sensor position.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: October 27, 2020
    Inventors: Deena Dayalan Kothandaraman, Shouvik Das, Saurabh Agrawal, Renju Chandrasekhara Panicker
  • Patent number: 10644555
    Abstract: A winding support (1) for an electric machine (100), having multiple pole teeth (10), wherein each pole tooth (10) has a tooth shank (14) around which at least one winding can be arranged, and wherein a tooth shank (14) has an increasing width of the tooth shank (14) in an axial direction (3) of the winding support (1) proceeding from an axial face side of the winding support (1). At least one tooth shank (14) has an increasing or decreasing width in or counter to the radial direction (5) of the winding support (1).
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: May 5, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Tankred Mueller, Victor Ludwig
  • Patent number: 10476323
    Abstract: An electric machine comprising a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: November 12, 2019
    Inventor: James Brent Klassen
  • Patent number: 10447122
    Abstract: Rotating electric machine provided with an axis X. The machine comprises a front part and a rear part. The machine comprises a rotor of axis X comprising two axial end surfaces, each provided with fan blades. The axial surfaces located on the side of the front part and on the side of the rear part. A stator comprises a stator body having slots. The stator comprises a winding installed in the slots and forming a front winding head and a rear winding head. The rotor and the stator are placed in a casing. The front winding head completely masks the blades of the axial surface located on the front side of the machine, along a direction perpendicular to axis X.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: October 15, 2019
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Stéphane Desenclos, Eric Delcroix, Mostafa Kadiri, Ludovic Doffe, Benjamin Pouchelle, Patrice Azoulay
  • Patent number: 10371146
    Abstract: An electric pump includes an outer rotor rotatably disposed radially inward of a stator, the outer rotor including a plurality of permanent magnets in an outer circumferential surface thereof, a plurality of plate holding grooves being formed in an inner circumferential surface of the outer rotor; an inner rotor provided radially inward of the outer rotor, a plurality of slots being radially formed in an outer circumferential surface of the inner rotor; and a plurality of connecting plates each including a head portion and a radially-inner end portion, the head portion being formed in a substantially circular shape in cross section and fitted swingably into the plate holding groove, the radially-inner end portion being slidably fitted into the slot. Each of the plate holding grooves is located within a projection plane of the permanent magnet with respect to a circumferential direction of the outer rotor.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: August 6, 2019
    Inventors: Toshinobu Horimatsu, Haruo Iwano, Satoshi Masukura
  • Patent number: 10344888
    Abstract: A servovalve (15) comprising a motor (16), a motor bias mechanism (20), a first stage valve member (22) adapted to be moved from a first position to a first off-null position, a second stage member (29) adapted to be moved from a first position to a second position with movement of the first valve member (22), a transfer link (34) acting between the first (22) and second (29) valve members, an eccentric drive member (35) acting between the motor (16) and the transfer link (34), the transfer link (34) and drive member (35) configured such that selective movement of the motor (16) causes the transfer link (34) to move the first valve member (22), movement of the first valve member (22) causes the second valve member (29) to move, and movement of the second valve member (29) causes the transfer link (34) to move the first valve member (22) from the first off-null position back to the null position.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: July 9, 2019
    Assignee: Moog Inc.
    Inventors: John Kopp, Christopher Mazurkiewicz
  • Patent number: 10299559
    Abstract: A single phase motor and a hair dryer are provided. The motor includes a stator and a rotor. The stator includes a stator core and a stator winding. The stator core includes an outer ring portion, teeth extending inwardly from the outer ring portion, and two pole shoes extending from a distal end of each tooth. A winding slot is formed between each two adjacent teeth. A slot opening is disposed between the pole shoes of the adjacent teeth, and is offset from one of the two adjacent teeth. The air supplying unit includes the single phase motor and an impeller. The startup angle and cogging torque of the motor are adjustable by adjusting the position/width of the slot opening, without the need of additional positioning slots or positioning holes defined at the pole shoes, which makes the motor structure simple.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: May 28, 2019
    Inventors: Yue Li, Chui You Zhou, Jie Chai, Tao Zhang, Qiang Zhou
  • Patent number: 10236731
    Abstract: A wet electric motor for a pump includes a stator casing, a stator arranged in the stator casing, and a can, wherein first resilient pressure elements are arranged inside the stator casing in such a way as to exert a compressive force in the direction of the can on at least parts of the stator, as well as to a pumping set with such a wet electric motor.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: March 19, 2019
    Assignee: Grundfos Holding a/s
    Inventor: Georg Blaser
  • Patent number: 10097070
    Abstract: A motor is disclosed. The motor includes a stator with a stator coil to generate a periodic magnetic field and a rotor. An air gap is disposed between the stator and the rotor. The rotor has at least one rotor ring, a portion of the rotor ring is disposed in the air gap. Due to the magnetic field, a periodic current is induced in the rotor ring. The current flowing through the portion of the rotor ring disposed in the air gap flows in a first direction to rotate the rotor relative to the stator.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: October 9, 2018
    Assignee: Coleridge Design Associates LLC
    Inventor: Geoffrey A. Boyd
  • Patent number: 10044296
    Abstract: An electric motor device includes a rotor, a stator, and electrical means for driving rotation of the rotor relative to the stator, the device being characterized in that the stator includes a substantially spherical cavity receiving the rotor, which is itself substantially spherical, and in that the electrical means are arranged to drive the rotor in rotation about at least two axes.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: August 7, 2018
    Inventors: Yann Vandenbaviere, Francois Guillot
  • Patent number: 9997983
    Abstract: An electric motor, with a cage type rotor, of single or polyphase design having a multiple winding design in a single stator core. Where the primary winding and secondary winding having a magnetically and electric circuit configured alignment, that is a 0° difference in the respective magnetic alignments or the electric circuitry alignments. Yet completely separate and isolated from one another, electrically and physically. Wherein the prime operative function is configured in a series resonant and a parallel resonant circuit, using capacitors to produce a phase shift in the secondary winding. With the ability to be reconfigured to a secondary operative function, identical to the original winding and in all of its original operative designed functions.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: June 12, 2018
    Inventors: Erling S. Nordstrom, Daniel De Jesús
  • Patent number: 9937012
    Abstract: A surgical robot comprising an articulated arm, the arm having a terminal portion comprising: a distal segment having an attachment for a surgical instrument; an intermediate segment; and a basal segment whereby the terminal portion is attached to the remainder of the arm; a first articulation between the distal segment and the intermediate segment, the first articulation permitting relative rotation of the distal segment and the intermediate segment about a first axis; and a second articulation between the intermediate segment and the basal segment, the second articulation permitting relative rotation of the intermediate segment and the basal segment about a second axis; wherein: the intermediate segment comprises a third articulation permitting relative rotation of the distal segment and the basal segment about third and fourth axes; and the first, second and third articulations are arranged such that in at least one configuration of the third articulation the first and second axes are parallel and the thir
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: April 10, 2018
    Assignee: CMR Surgical Limited
    Inventors: Luke David Ronald Hares, Steven James Randle
  • Patent number: 9901980
    Abstract: An induction rotor assembly having an induction cage that is formed using a combination of liquid and solid materials. The first and second end plates of the induction cage may be fabricated before the casting of the conductors of the induction cage. According to certain embodiments, the first and second end plates may be assembled with first and second molds and a rotor core to form a casting assembly. A liquid casting material may be injected into the casting assembly, wherein the liquid casting material may solidify within one or more core passageways of the rotor core, thereby forming the conductors of the induction cage. The first and second end plates may also include flow channels that may be configured to facilitate the flow of the liquid casting material in the casting assembly, and increase the area of contact between the liquid casting material, when solidified, and the end plates.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: February 27, 2018
    Assignee: Ingersoll-Rand Company
    Inventors: Petri Juhani Maki-Ontto, Fredrik Andreas Boxberg
  • Patent number: 9885590
    Abstract: A method for ascertaining a position of a rotor relative to a stator of an electrical machine having a permanently excited rotor and a plurality of windings for the stator or vice versa; in response to an energization of at least one of the windings, a change in an inductance of the winding being ascertained; and, on the basis of the change in the inductance of the winding, the position of the rotor being ascertained relative to the stator.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: February 6, 2018
    Inventors: Henning Hermes, Florian Schmitt, Ulrich Foerch, Udo Schulz, Tobias Friedl, Ulf Mueller, Achim Jenne
  • Patent number: 9825515
    Abstract: The rotation of the synchronous reluctance motor is controlled through energization of the winding with current of a phase having a ratio k between the total sum of radial-direction widths of the slits on the q-axis and a magnetic gap length, and having a lead angle ? from the d-axis. Among the core layers, the radial-direction width, on the q-axis, of the core layer that lies at a position closest in the circumferential direction to a point P at which there intersect the outer periphery of the rotor and the straight line passing through the rotor center and drawn at an angle ?=arctan(tan ?/(1+0.2k)) from the d-axis, is larger than the radial-direction width of other core layers on the q-axis.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: November 21, 2017
    Inventors: Kazumasa Ito, Shinichi Yamaguchi
  • Patent number: 9820707
    Abstract: An X-ray device includes a C-bracket having a radiation detector rotatably mounted on the C-bracket. The radiation detector may be rotated by a motor drive. The axis of rotation is perpendicular to the detector surface. The motor drive is a torque motor that includes a stator and a rotor. The radiation detector is coupled to the rotor.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: November 21, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventor: Michael Atzinger
  • Patent number: 9757585
    Abstract: The application is directed to devices and methods where one or more magnetic or magnetizable implants provides therapeutic benefits to a patient. The implant may be useful for expanding the range of motion of joints or dynamically providing different responses to changing conditions in the body where the implant is placed. An electromagnet is placed on or in a bone on one side of a joint, and another electromagnet or magnetically active material is placed on or in a bone on the opposing side of the joint. The electromagnet may be continuously energized to relieve pressure in the joint space, or may be energized in response to forces applied to the joint.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: September 12, 2017
    Assignee: P Tech, LLC
    Inventors: Peter M. Bonutti, Justin E. Beyers
  • Patent number: 9751644
    Abstract: Provided is a three-dimensional rigid ball driving system including: a support frame having a polyhedral shape; a rigid ball positioned at the center of an inner portion of the support frame; a plurality of ball bearings installed at corners of inner sides of the support frame, respectively, and contacting a surface of the rigid ball; and a plurality of electromagnets disposed around the ball bearings and generating magnetic fields to rotate the rigid ball; and a controller controlling the electromagnets to control a rotation direction and a rotation speed of the rigid ball.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: September 5, 2017
    Assignee: Korea Aerospace Research Institute
    Inventors: Dae-Kwan Kim, Hyungjoo Yoon, Wooyong Kang, Yong Bok Kim, Hong-Taek Choi
  • Patent number: 9746831
    Abstract: Regulating body for a wristwatch, comprising: a generator provided with a rotor and a stator with M+N coils, M being a whole number higher than, or equal to, 1; and an electronic regulating circuit having a first load impedance with an adjustable value for adjusting the current in N of said M+N coils, and therefore the rotational speed of the rotor. Only a limited number of coils is therefore used for the braking, the other coils continuing to supply the electronic regulating circuit.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: August 29, 2017
    Assignee: Richemont International SA
    Inventors: Daho Taghezout, Willy Meier, Alexandre Michalet, Kurt Straumann
  • Patent number: 9705379
    Abstract: A driving device is provided with a gear unit and axial gap motors. The gear unit is provided with an input shaft and a driven member. The input shaft is supported by a supporting member. The input shaft is engaged with the driven member. Two axial gap motors are respectively attached to the input shaft so as to face each other.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: July 11, 2017
    Inventors: Takahito Azuma, Hiroki Mizuhashi
  • Patent number: 9641112
    Abstract: A power source includes a generator configured to receive mechanical energy and convert the mechanical energy to an electrical output. The generator includes a rotor and a stator. The stator has a first coil and a second coil. The first coil and the second coil are selectively arranged in a first configuration to provide the electrical output at a first voltage level and in a second configuration to provide the electrical output at a second voltage level. The power source also includes a detection circuit including a sensing relay. The detection circuit is configured to generate an output based on whether the first coil and the second coil are arranged in the first configuration or in the second configuration.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: May 2, 2017
    Inventors: Nicholas Harknett, Dale Herbstritt
  • Patent number: 9425669
    Abstract: Described herein is a ball joints universal rotary motor, a manufacturing method and a working mechanism thereof. The ball joints universal rotary motor comprises a housing, a spherical-cap shaped stator body, and a rotor body configured to be secured within the stator body. The stator body is made from a permanent magnet. The rotor body comprises multiple layers of armatures and multiple spacer layers. The multiple layers of armatures are symmetrically distributed along the axis of the rotor body. A spacer layer is provided between two adjacent layers of armatures. The multiple layers of armatures and multiple spacer layers are securely connected by a bolt. The bolt and the rotor body are axially connected. The rotor body is of a spherical shape. Each layer of the armatures is wound with two layers of coils: a first layer and a second layer. The motor as provided is configured to realize movement in multiple directions.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: August 23, 2016
    Inventor: Kuokwa Ho
  • Patent number: 9425660
    Abstract: Described herein is a technology for an electric motor system that reduces stress in motor shaft bearings. Furthermore, the electric motor system that provides an adequate heat ventilation is described herein.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: August 23, 2016
    Inventor: C. Michael Scroggins
  • Patent number: 9238405
    Abstract: A motor unit and a grill shutter driving device are disclosed. The grill shutter driving device according to an exemplary embodiment of the present inventive concept includes a body unit interposed between a plurality of grill shutters, a motor unit installed inside the body unit for generating driving power to drive the grill shutter, a control unit for controlling generation of driving power of the motor unit, and a connection unit for providing driving power of the motor unit to the grill shutter. The motor unit includes a plurality of coil units in which electric coil is rolled, a stator to be magnetized, a rotator having magnetism with a permanent magnet and rotating due to interference of the magnetization of the stator, wherein the plurality of coil units are separated with each other in a radial form with even number, and any one side of the mutually facing coil units includes electric coil rolled in, thereby forming an asymmetry coil structure.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: January 19, 2016
    Inventors: Siyurn Koh, Jungwoo Koh, Byungdae Choi, Wanyoung Park, Junghyuk Lim, Sungbok Chae, Sehyun Rhyu, Jeongjong Lee, Bongwan Gu, Junhyuk Choi
  • Patent number: 9190885
    Abstract: A drive device for a motor vehicle includes at least one electric machine having at least one rotor element which includes a single-piece, essentially sleeve-shaped rotor carrier to delimit an installation area in a radial direction. At least one transmission device is disposed, at least partly, in the installation area and configured to be driven by the electric machine via the rotor element.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: November 17, 2015
    Inventors: Frank Bäuerlein, Markus Klöpzig, Klaus Schleicher
  • Patent number: 9149291
    Abstract: A system, delivery device and method delivers ultrasonic energy to a target musculoskeletal tissue site. In some embodiments, the delivery device includes a stainless steel needle joined to a horn. In some embodiments, the stainless steel needle is joined to the horn using a heating process or a brazing process.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: October 6, 2015
    Assignee: TENEX HEALTH, INC.
    Inventors: Tate Ray Parham, Brad Buzea
  • Patent number: 9093943
    Abstract: A switched reluctance machine having salient stator and rotor poles. Alternating ones of the stator poles having windings and the others having permanent magnets attached on their pole faces. The alternate stator pole windings are provided with polarities that are suitable for unidirectional and bidirectional current operation of the switched reluctance machine. The alternate poles with permanent magnets in the switched reluctance machines can have also concentric windings placed on them and excited with currents to further augment the flux linkages in the stator poles. The windings on the poles with permanent magnets can be excited from the same source as the windings on the poles without permanent magnets to enhance power output or provide power factor correction.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: July 28, 2015
    Assignee: Regal Beloit America, Inc.
    Inventor: Krishnan Ramu
  • Publication number: 20150115761
    Abstract: The invention relates to an electro-hydraulic device for moving a jib for a derricking-jib tower crane, the motor of said device being designed for operation at the average required power. The operating time in an energy-wasting part load range is thus significantly reduced in relation to conventional electro-hydraulic devices for moving a jib.
    Type: Application
    Filed: April 16, 2013
    Publication date: April 30, 2015
    Inventors: Ulrich Dorzbach, Andreas Wagner
  • Patent number: 9006948
    Abstract: Disclosed is a hybrid pole bearingless switched reluctance motor (BLSRM). The BLSRM includes a stator provided with windings, a rotor rotating about an axis when current is conducted to the windings. The rotor includes a plurality of rotor poles extending radially outward, and the stator includes a plurality of stator poles extending radially inward. The windings include suspending windings to generate radial force for the rotor and torque windings to generate torque. The suspending windings are mutually separated from the torque windings. Through the use of the hybrid pole BLSRM, a stator pole generating the radial force can be controlled independently from the stator pole generating the torque by separately arranging the stator pole generating the radial force and the stator pole generating torque based on the analysis of radial force and torque characteristics according to the position of the stator poles.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: April 14, 2015
    Assignee: Kyungsung University Industry Cooperation Foundation
    Inventors: Jin Woo Ahn, Dong Hee Lee, Huijun Wang
  • Patent number: 9000648
    Abstract: A reluctance machine is disclosed. The reluctance machine includes a stationary member including a housing, a plurality of windings disposed in the housing, a plurality of electrical connections each electrical connection coupled to a corresponding winding of the plurality of windings, and a plurality of teeth coupled to the housing, a rotating member having a center including a mechanical coupling member formed about the center, and a plurality of outwardly protruding poles centrally located within the stationary member each outwardly protruding pole having a continuous outer surface adjacent to at least one tooth of the plurality of teeth, wherein each outer surface of each outwardly protruding pole having a first portion being a first distance away from the center and a second portion being a second distance away from the center.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: April 7, 2015
    Assignee: Purdue Research Foundation
    Inventors: Cahya Harianto, Scott Sudhoff
  • Patent number: 8922071
    Abstract: Disclosed herein is a switched reluctance motor including: a shaft forming the rotation center of the motor; a rotor part rotatably coupled onto the shaft; a first stopper coupled to an upper portion of the rotor part in the axial direction to support the rotor part; and a second stopper coupled to a lower portion of the rotor part in the axial direction to support the rotor part, wherein the first stopper or the second stopper has a separate internal space formed at an inner side thereof. A weight member is coupled to the internal space, thereby making it possible to secure stable and reliable rotation balancing even at the time of high speed rotation of the motor.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: December 30, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Yong Wan Cho
  • 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
  • Patent number: 8878412
    Abstract: Alternating current electric induction motor, in particular a motor (12-22) which is fed by a frequency variator, comprising a casing (4) which supports a rotor (9) by means of roller bearings (8) and which supports a stator (13) with a coaxial ring-shaped core (16) made of a magnetic material, characterized in that the stator (13) is provided with an auxiliary closed loop toroidal winding (20).
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: November 4, 2014
    Assignee: KS Research S.A.
    Inventors: Stefan Kupisiewicz, Jacuqes Jean Schoebrechts
  • Patent number: 8854170
    Abstract: An energy conversion system includes a first core section, a tank, a flexible structure, and an output coil. The tank contains a volume of fluid having a high magnetic permeability. The flexible structure is fluidly coupled to the tank and movable from a retracted to an extended position in response to the injection of the fluid from the tank. The output coil is in electrical communication with the first core section. A charging station includes a second core section and an input coil. The first and second core sections are in alignment to define an air gap therebetween. The air gap is reduced when the flexible structure is in the extended position within the air gap such that the flexible structure transmits magnetic flux between the second core section and the first core section. The magnetic flux in the first core section induces electrical current in the output coil.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 7, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Edward D. Tate, Jr., Alan G. Holmes
  • Patent number: 8847522
    Abstract: In a motor, a stationary member is provided with a number M (M is a positive integer) of first poles within 360 electrical degrees at spaces therebetween. A plurality of windings are at least partly wound in the spaces, respectively. A movable member is movably arranged relative to the stationary member and provided with a number K (K is a positive integer) of second poles. The number K of second poles is different from the number M of first poles. A unidirectional current supply unit supplies a unidirectional current to at least one of the windings so as to create an attractive force between at least one of the first poles and a corresponding at least one of the second poles to thereby move the movable member relative to the stationary member.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: September 30, 2014
    Assignee: Denso Corporation
    Inventors: Masayuki Nashiki, Tomokazu Ishikawa, Yuichiro Ito
  • Publication number: 20140265708
    Abstract: A dual magnetic phase rotor lamination for use in induction machines is disclosed. A rotor assembly is provided that includes a rotor core and a plurality of rotor conductors mechanically coupled to the rotor core and positioned thereabout, with the plurality of rotor conductors positioned within slots formed in the rotor core. The rotor core comprises a plurality of rotor laminations that collectively form the rotor core, with each of the rotor laminations being composed of a dual magnetic phase material and including a first rotor lamination portion comprising a magnetic portion and a second rotor lamination portion comprising a non-magnetic portion, wherein the second rotor lamination portion comprises a treated portion of the rotor lamination that is rendered non-magnetic so as to adjust a leakage inductance of the induction machine.
    Type: Application
    Filed: March 29, 2013
    Publication date: September 18, 2014
    Applicant: General Electric Company
    Inventors: Steven Joseph Galioto, Ayman Mohamed Fawzi EL-Refaie
  • Patent number: 8736136
    Abstract: A switched reluctance motor includes a stator and a rotor, the stator having stator poles supporting a magnetic field focusing device such as a near field plates on each stator pole tip. An example near field plate has a spatially modulated surface reactance configured so as to focus magnetic flux extending from each pole tip within at least one region of increased magnetic field proximate the pole tip.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: May 27, 2014
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Jaewook Lee, Ercan Mehmet Dede, Debasish Banerjee, Hideo Iizuka
  • Patent number: 8577527
    Abstract: A drive control device which estimates an engine torque during traveling in a fixed gear ratio mode is disclosed. The drive control device includes the engagement mechanism including the revolution component revolved by the torque of the engine and the fixed component that engages with the revolution component, the torque applying unit which applies torque to the revolution component and the first transmitting control unit which engages the engagement mechanism to make the engagement mechanism receive the reaction force of the torque. The torque estimating control unit executes control of torque applied to the revolution component by the torque applying unit during executing the control by the first transmitting control unit to detect the phase change between the revolution component and the fixed component and estimates the torque of the engine based on the phase change and torque applied by the torque applying unit.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: November 5, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Mitsumasa Fukumura, Shoichi Sasaki
  • Patent number: 8575813
    Abstract: A rotor core for an induction motor. The rotor core includes a body that at least (i) extends axially from an outer surface of the body inward toward a central axis, (ii) extends from a first axial end to a second axial end, and (iii) defines a plurality of internal grooves. Further, each groove at least (iv) includes an opening at the outer surface of the body, (v) is defined by two opposing walls, (vi) extends from the first axial end to the second axial end, (vii) extends axially between the opening at the exterior surface and an inward end, and (viii) includes a body section. And wherein (ix) at least one wall of the opposing walls of the groove includes, in the body section of the groove, an extended segment forming a portion of increased breadth for the groove.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: November 5, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Richard M. Kleber, Michael J. Walker
  • Publication number: 20130186130
    Abstract: The efficiency of an induction motor is improved while suppressing the generation of magnetic flux saturation of a rotor core. In an induction motor, “a magnetic path width of a rotor” which is the product of a circumferential width of a rotor tooth formed in the rotor and the number of rotor teeth is equal to or larger than “a magnetic path width of a stator” which is the product of a circumferential width of a stator tooth formed in the stator and the number of stator teeth.
    Type: Application
    Filed: March 12, 2013
    Publication date: July 25, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takahiro TSUTSUMI, Koji Yabe
  • Patent number: 8441223
    Abstract: Disclosed herein is a torque control method for a high-speed Switched Reluctance Motor (SRM), which controls a torque in the high-speed operation of a 2-phase SRM. In the torque control method for a high-speed SRM, a positive torque (T*mA) of an active phase (A phase) of the two phases of the SRM is compensated for based on a negative torque attributable to an inactive phase (B phase) of two phases during a compensation control enable interval (ENA) ranging from a time point at which the active phase (A phase) is turned on to a time point at which tail current of the inactive phase (B phase) remains. Accordingly, the present invention can remarkably reduce a torque ripple occurring in high-speed operation mode in consideration of the influence of a negative torque attributable to tail current.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: May 14, 2013
    Assignee: Kyungsung University Office of Industry-Academy Cooperation
    Inventors: Jin-Woo Ahn, Dong-Hee Lee
  • Patent number: 8400044
    Abstract: An electromotive machine (200, 900) comprises a rotor (230; 800; 920) and a stator (210, 220; 500; 600; 700; 910, 920). The stator (210, 220; 500; 600; 700; 910, 920) comprises a first group of primary windings (260a, 240b, 240d; 520; 640a, 640b, 650a, 650b, 660a, 660b; 930a, 930b, 933a, 933b, 937a, 937b), which are concentrated windings, arranged on a first side of the rotor (230; 800; 920) and a second group of primary windings (240a, 250a, 240c; 530; 740a, 740b, 750a, 750b, 760a, 760b; 941a, 941b, 943a, 943b, 947a, 947b) that are concentrated windings arranged on a second, opposite, side of the rotor (230; 800; 920). The primary windings of each group comprise a plurality of coils that, in use, are supplied with current and produce a magnetic field.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: March 19, 2013
    Assignee: Force Engineering Limited
    Inventor: John Frederick Eastham