Inductor-type Generators (variable Reluctance) Patents (Class 310/168)
  • Patent number: 10717494
    Abstract: A bicycle magnetism generation device and a disc brake adapter are configured to allow a rotation state of a bicycle wheel to be detected in a suitable manner. The bicycle magnetism generation device includes a magnetism generator generating magnetism. In a state where the disc brake rotor is coupled to a hub of a bicycle, the bicycle magnetism generation device is at least partially arrangeable between the disc brake rotor and the hub.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: July 21, 2020
    Assignee: Shimano Inc.
    Inventors: Satoshi Shahana, Tadaharu Kurotobi, Kazuhiro Fujii, Kanako Kiyokawa
  • Patent number: 10663319
    Abstract: A sensor device for determining a position ?1 of a rotor of an electrical machine, for example an electric motor or electric generator. The sensor device comprises a number r of sensors, which detect the magnetic field generated by the rotor and/or a permanent magnet rotating with the rotor, and an electronic circuit which is configured to detect and digitalize the sensor signals a1 to ar and to form a signal vector {right arrow over (a)}=(a1, . . . , ar), to form a measurement vector {right arrow over (q)} according to a predetermined linear function g to {right arrow over (q)}=g({right arrow over (a)}), to calculate a vector {right arrow over (p)}=Mrot1·{right arrow over (q)}, wherein {right arrow over (p)} is a 2-component vector with the components p1 and p2 and Mrot1 is a 2×n matrix, and to determine the position ?1 of the rotor to ?1=a tan 2(p2, p1). The invention further concerns a control device for an electric motor with such a sensor device.
    Type: Grant
    Filed: September 3, 2017
    Date of Patent: May 26, 2020
    Assignees: NM Numerial Modelling GmbH, maglab AG
    Inventor: Markus Roos
  • Patent number: 10644551
    Abstract: A rotor is provided for use in an electric motor. The rotor includes a shaft assembly rotatable about an axis. The rotor also includes a plurality of magnets arranged arcuately about the shaft assembly, and a plurality of pole segments arranged arcuately about the shaft assembly. The pole segments alternate with the magnets, such that each of the magnets is at least in part interposed between adjacent pole segments. The pole segments interlock with the coupling element.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: May 5, 2020
    Assignee: Nidec Motor Corporation
    Inventors: Keith I. Hoemann, Michael W. Major, Philip S. Johnson, William R. Lewis, Kent A. Sheeran
  • Patent number: 10612622
    Abstract: A magnetic engine vibration isolator, including: at least one block magnet arranged to be connected to a block for an internal combustion engine; and a crank magnet arranged to be connected to a crankshaft for the internal combustion engine. A magnetic engine vibration isolator, including: a first block magnet arranged to be connected to a block for an internal combustion engine and extend about an axis of rotation for a crankshaft for the internal combustion engine; a second block magnet arranged to be connected to the block and extend about the axis of rotation; and a crank magnet arranged to be connected to the crankshaft and disposed between the first block magnet and the second block magnet.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: April 7, 2020
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Victor Norwich
  • Patent number: 10544835
    Abstract: A wheel bearing assembly for a motor vehicle. A roller bearing arranged in a wheel carrier, by which a wheel hub is rotatably mounted with respect to the wheel carrier. The wheel carrier is provided with a circumferential axial gap, and that at the rotary bearing ring of the roller bearing is formed an extension which is extending into the gap.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: January 28, 2020
    Assignee: AUDI AG
    Inventors: Johannes Albl, Michael Frisch
  • Patent number: 10541575
    Abstract: A rotor for an electric rotating machine, in particular a synchronous machine includes a shaft that can rotate about an axis of rotation, and at least one pole shoe. In order to improve vibration properties, the pole shoe includes a pole shoe body and a pole shoe sheet metal which rests on a radially outer surface of the pole shoe body.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 21, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Marco Festa, Matthias Centner, Ilja Sabelfeld
  • Patent number: 10541635
    Abstract: A motor control method comprises detecting operating parameters of a motor system comprising a plurality of windings, a rotor, a stator magnetically coupled to the rotor and a plurality of power converters connected to the plurality of windings, determining, by a controller, a suitable pole number and a preliminary set of operating variables based upon the operating parameters, reducing operating stresses of the motor system gradually and after reducing the operating stresses, configuring the plurality of power converters so as to adjust the number of poles of the motor system according to the suitable pole number.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: January 21, 2020
    Assignee: Quanten Technologies, Inc.
    Inventors: Hengchun Mao, Xuezhong Jia
  • Patent number: 10508931
    Abstract: The invention relates to a motor and a resolver thereof. The resolver includes a resolver stator (70), a resolver rotor (80). The resolver includes (70) a plurality of resolver stator teeth (73) and resolver stator windings (75) wound around the resolver stator teeth (73). The resolver rotor (75) includes a resolver rotor core (81) received in a space surrounded by the resolver stator teeth (73) and capable of rotating around a shaft axis. The resolver stator windings (75) includes first output windings wound around each of the resolver stator teeth (73) by a first number of turns, second output windings wound around each of the resolver stator teeth by a second number of turns, and exciting windings wound around each resolver stator teeth by a third number of turns.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: December 17, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Rui Feng Qin, Cheng Shun Du, Ning Sun, Xing Liu
  • Patent number: 10491075
    Abstract: A stator assembly is provided including (a) an inner frame structure having an annular shape with an inner circumferential edge and an outer circumferential edge, wherein the inner frame structure is formed around a center axis corresponding to an axial direction of the electric generator; and (b) an outer frame structure, which surrounds the inner frame structure and which, starting from the outer circumferential edge, includes two inclined annular walls which, along a radial direction, spread apart from each other such that in between a first inclined annular wall and the second inclined annular wall there is formed an accommodation space. Preferably, the inner frame structure and the outer frame structure are made from a single piece.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: November 26, 2019
    Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
    Inventors: Uffe Eriksen, Edom Lemma, Claus Thygesen
  • Patent number: 10488427
    Abstract: A wheel speed sensor includes an electromagnetic sensor having an electromagnetic sensor head disposed at a distal end thereof and a flange acting as a sensor support. The electromagnetic sensor head includes a magnet and an integrated circuit for sensing movement of a tone ring formed of magnetic attractive material. A sensor interface disposed at the distal end of the electromagnetic sensor is mechanically secured to a flange interface of the flange. The sensor interface can include outwardly projecting opposing tabs on opposing sides of the electromagnetic sensor head that are received by opposing apertures in parallel, spaced projecting arms that form the flange interface. In another arrangement, the sensor is inserted into an opening defined in the flange, and a retainer element is inserted into a slot formed on the electromagnetic sensor head such that the sensor cannot be extracted from the opening.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 26, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Ket Seng Koh, Walter Heinrich
  • Patent number: 10481180
    Abstract: A sensing device includes a housing positioned on an outer surface of a wire and a circuit board received in the housing. The circuit board has a sensing area for sensing the wire, such that the measurements obtained by the circuit board are relative values. Therefore, the circuit design of the circuit board can be simplified, and the size of the sensing device can be reduced.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: November 19, 2019
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Bo-Yin Chu, Hsu-Cheng Chiang, Ming-Shan Jeng
  • Patent number: 10410778
    Abstract: A magnetic circuit component includes a magnetic core and a coil formed by winding a conductor around the magnetic core. The magnetic circuit component includes a magnetic material section that is formed from a soft magnetic material, and that covers a part of a surface of the coil or the entire surface of the coil and is disposed away from the magnetic core.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: September 10, 2019
    Assignee: DENSO CORPORATION
    Inventors: Naoya Kondou, Akira Sakamoto, Kazuhiro Umetani
  • Patent number: 10389209
    Abstract: A hydroelectric turbine may include a stator comprising a first plurality of electricity-generating elements and a rotor comprising a second plurality of electricity-generating elements. The rotor may be disposed radially outward of an outer circumferential surface of the stator and configured to rotate around the stator about an axis of rotation. The rotor may be a flexible belt structure. The turbine may further include at least one bearing mechanism configured to support the rotor relative to the stator during rotation of the rotor around the stator.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: August 20, 2019
    Assignee: OCEANA ENERGY COMPANY
    Inventors: Daniel E. Power, Ned Hansen
  • Patent number: 10345973
    Abstract: A capacitive sensing system for determining mass displacement and direction is disclosed. In an embodiment, a capacitive sensing system for sensing mass displacement and direction comprises: a mass; a periodic drive electrode pattern formed on or attached to the mass; a sensing electrode array positioned relative to the periodic electrode pattern, the sensing electrode array operable to sense a capacitance in an overlapping area between the periodic drive electrode pattern and the sensing electrode array; and a capacitive sensing circuit coupled to at least the sensing electrode array, the capacitive sensing circuit operable to generate a periodic signal based on the sensed capacitance, to determine a phase shift in the periodic signal in response to the periodic drive electrode pattern moving relative to the sensing electrode array, and to determine, based on the phase shift, a displacement and direction of the mass on a movement axis.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: July 9, 2019
    Assignee: Apple Inc.
    Inventors: Mengshu Huang, Patrick J. Au, Xingxing Cai, Yuta Kuboyama
  • Patent number: 10236756
    Abstract: A rotating electric machine includes a multi-phase coil, an armature core, a rotor, a yoke core and a superimposer. The armature core has the multi-phase coil wound thereon. The rotor is rotatably disposed and has a plurality of magnetic poles facing the armature core. The yoke core is arranged so as to surround outer peripheries of the multi-phase coil and the armature core. The yoke core is magnetically connected with the magnetic poles of the rotor. The superimposer superimposes a DC component on a multi-phase alternating current supplied to the multi-phase coil, thereby supplying a DC field magnetic flux to a magnetic circuit that is formed by the armature core, the magnetic poles of the rotor and the yoke core.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: March 19, 2019
    Assignee: DENSO CORPORATION
    Inventor: Shin Kusase
  • Patent number: 10193430
    Abstract: An electromagnetic device includes discrete wires for its poles or teeth. In another aspect, an electromagnetic device includes a stator unit and an adjacent movable unit, at least one of which includes magnetic flux-carrying poles, with a majority of each pole including multiple discrete wires. In another aspect, the movable unit is an electric motor rotor, a linear electric motor armature, a solenoid armature, or an electric generator rotor.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: January 29, 2019
    Assignee: Board of Trustees of Michigan State University
    Inventor: Norbert Müller
  • Patent number: 10193418
    Abstract: A rotary power generating apparatus has the first, second piston magnet members, the crankshaft, the first, second guide members and the first, second fixed magnet members and the first, second demagnetizing belts. The first, second piston magnet members and the first, second fixed magnet members are arranged so that the top pole surfaces and fixed pole surfaces having equal polarity, oppose each other. The first, second demagnetizing belts have demagnetizing magnet parts, having magnetic forces weaker than that of the magnetic poles of the top pole surfaces and different from the polarity of the top pole surfaces, and non-magnetic force parts.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: January 29, 2019
    Inventor: Katsushito Yamano
  • Patent number: 10141796
    Abstract: The present invention goes away from conventional teaching and provides a stator having a construction that creates or allows induced currents thus providing a damping function. This effect is provided by forming the stator back iron of a solid piece of iron material or iron alloy as opposed to a stack of laminations or compressed powder.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: November 27, 2018
    Assignee: GOODRICH ACTUATION SYSTEMS SAS
    Inventor: Martin Cantagrel
  • Patent number: 10135317
    Abstract: A reciprocating piston engine is disclosed having a first inner magnetic field unit comprising a first inner magnetic field unit arranged on a first crank arm of a crankshaft including a magnetizable material, and a stationary first outer magnetic field unit. The first inner magnetic field unit and the first outer magnetic field unit together form a first electromechanical converter. The first crank arm has a first securing surface on a face which points radially outwards with respect to a crankshaft axis and which is opposite a first connecting rod bearing. A first counterweight is fixed to the first securing surface in a formfitting manner in the radial direction, said first counterweight including a non-magnetizable material. The first magnetic field unit is arranged on a counterweight face pointing radially outwards with respect to the crankshaft axis.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: November 20, 2018
    Assignee: HVD AG
    Inventors: Andreas Schuttenbach Von, Karl-Heinz Grabher
  • Patent number: 10090724
    Abstract: A stator for use in a dual-phased motor includes a magnetic yoke portion, a first magnetic pole, a second magnetic pole, a third magnetic pole and a fourth magnetic pole. The first, second, third and fourth magnetic poles are circumferentially arranged around and coupled with the magnetic yoke portion. Each of the first, second, third and fourth magnetic poles is wound with a coil having a first coil layer and a second coil layer. The first coil layer and the second coil layer of each of the first, second, third and fourth magnetic poles are in different phases. In other embodiments, several methods for winding a stator for use in a dual-phased motor are respectively proposed.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: October 2, 2018
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Chung-Ken Cheng, I-Fen Hsieh, Shit-Chin Wu, Sing-Ying Lee
  • Patent number: 10084472
    Abstract: The present invention relates to a phase modulation-type redundant two-phase-output resolver, an excitation signal (100) is applied to an excitation winding (50) of an annular stator (21) having a VR-type rotor (20) disposed therein, and a two-phase output signal (101) is outputted from first and second output windings (43, 44) that are provided in the annular stator (21), the excitation winding (50) is made up of first and second excitation windings (40, 41) of mutually different phases, and the excitation signal (100) has two phases, and even in a case where a break occurs in only any one winding from among the first and second excitation windings (40, 41) and the first and second output windings (43, 44), at least a one-phase output signal can be obtained.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: September 25, 2018
    Assignee: TAMAGAWA SEIKI CO., LTD.
    Inventors: Hiroshi Kushihara, Kazuyuki Ishibashi, Hirofumi Maruyama, Katsutoshi Toyotake, Shinichi Arai, Toshiki Muramatsu
  • Patent number: 10075032
    Abstract: The alternator is used in the motor vehicles and provides increased current output. It comprises ring (17) and (17a) connecting the second claw poles (16) and (16a), and its peripheral surface which is opposite to the second claw poles (16) and (16a) is profiled and protruded outwards, shaped by the adjacent surfaces of inner and outer truncated cones whose axes coincide with the axis of the shaft. On the peripheries of external side plates (23) and (23a) at diameters equal to the inner diameters of the carried pole configurations and axes coinciding with the axis of the shaft (1) stationary are fixed second magnetoconductive rings (26) and (26a) whose surfaces located on the side of the first magnetoconductive rings (17), (17a) are shaped like a groove whose shape corresponds to the shape of the profiled protruded outwards peripheral surface of the first magnetoconductive rings (17), (17a) comprising them with possibility for their free rotation in the corresponding groove.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: September 11, 2018
    Assignee: ALMOTT, Ltd.
    Inventor: Encho Nokolov Popov
  • Patent number: 10060763
    Abstract: A sensor assembly for indicating the relative location of a metallic object. The sensor assembly including a primary electromagnetic coil arranged to generate a time varying magnetic field, and a secondary electromagnetic coil arranged to detect the time varying magnetic field as affected, directly or indirectly, by the object and to output, on the basis of the detected time varying magnetic field, a signal indicative of the relative location of the object. At least one of the primary and secondary electromagnetic coils is wound about a core body formed of a material having the same conductivity and/or magnetic permeability as the object.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: August 28, 2018
    Assignee: ROLLS-ROYCE POWER ENGINEERING PLC
    Inventor: Angelo Sigona
  • Patent number: 10041818
    Abstract: A wireless sensor assembly for monitoring conditions in an ambient environment, such as for use in a climate control system for a data center is disclosed. The sensor assembly has a small form-factor housing extending along a longitudinal axis and defining an interior space. A sensor circuit is disposed within the housing and includes at least one sensor element for detecting temperature and/or humidity that is enclosed within a vented sub-chamber of the housing. A mounting member forming part of an exterior surface of the housing mounts the sensor assembly vertically along the at an installation location within an ambient environment being monitored.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: August 7, 2018
    Assignee: Thermo-O-Disc, Incorporated
    Inventors: Timothy Graff, Gary D. Dinges, David Connell
  • Patent number: 10033233
    Abstract: An exterior rotor switched reluctance machine includes a stator, a rotor adjacent the stator and adjacent a housing, the housing connected to the stator. The stator further includes a back iron, a set of stator poles connected to the back iron and a set of windings disposed between the set of stator poles. The rotor, connected to a shaft and rotatively coupled to the stator, further includes a set of rotor segments. The set of windings includes a set of phases, each phase experiencing a flux linkage that varies with an angular position of the rotor. The apparatus operates as a motor in response to selectively energizing the set of phases with a set of current pulses. The apparatus operates as a generator in response to rotating the shaft.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: July 24, 2018
    Assignee: The Board of Regents, The University of Texas System
    Inventors: Babak Fahimi, Wei Wang, Chenjie Lin
  • Patent number: 10014734
    Abstract: An electromagnetic device is provided. It includes a plurality of input magnetic field generating devices, which will induce magnetic fields in output current generating devices. In one construction, the electromagnetic device can be operably coupled to a work input device wherein the electromagnetic device can be used as a generator set in combination with the energy input device. The input and output magnetic devices are arranged in radial arrays about a work input shaft. The output magnetic devices each include a core and a respective coil with the cores each having a longitudinal axis generally parallel to the axis of rotation of the shaft. The input devices and the output devices are mounted in respective carriers with the output device carrier being movable relative to the input device carrier.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: July 3, 2018
    Inventor: Larry Carpenter
  • Patent number: 10012267
    Abstract: A resolver bearing with an angle sensor to detect the angular position of the bearing rings. The angle sensor includes an annular resolver stator connected to one of the bearing rings and includes a transmission coil and a receiving coil designed as printed circuits on a multilayer printed circuit board. The transmission coil is arranged at least partly within a U-shaped shell core, and the receiving coil is arranged at least partly within and at least partly outside of the shell core. The angle sensor also has a resolver rotor rotationally fixed to the other of the two bearing rings and includes magnetically conductive components. The resolver rotor is arranged at least partly within the U-shaped shell core. A signal can be transmitted between the transmission coil and the receiving coil via a magnetic circuit. An angular position-dependent variable reluctance in the magnetic circuit can be specified by the resolver rotor.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: July 3, 2018
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Joerg Kegeler
  • Patent number: 10008660
    Abstract: A generator unit to harvest energy from motion is disclosed which comprises a support (6) with a connection member (7) for attachment to a movable object (8), at least a first body (3) and a second body (9) supported by the support and configured to move relatively to each other and with a varying, preferably magnetic field (4) spatially in between, one of the first or second body comprising at least one electricity generating member (2) of piezoelectric, electromagnetic or electrostatic type to produce electricity when mechanically deformed or moved, and a field engagement part (5) configured to move in the varying field when the first and second bodies move relatively to each other and generate a varying mechanical deformation or movement of the electricity generating member.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: June 26, 2018
    Assignee: MEGGITT A/S
    Inventors: Tomasz Zawada, Xu Ruichao, Michele Guizzetti, Louise Moller Borregaard, Henryk Roguszczak
  • Patent number: 9976643
    Abstract: A differential device includes: a differential gear mechanism; and an integrated differential case housing the mechanism, the differential case including bearing bosses formed integrally on one and other side portions thereof and aligned on a same axis to be rotatably supported by a transmission case; a work window being provided in the differential case; sleeves rotatably supported by the bosses and connected to side gears of the mechanism liquid-tightly. The sleeves can be passed through an inside of the differential case from the window and fitted and inserted to inner peripheries of the bosses, falling-off prevention devices are provided between the sleeves and the bosses, and seal devices for preventing lubricating oil in the differential case from flowing out are provided between the side gears and the sleeves. Accordingly, when drive shafts are removed from the differential device, the oil in the transmission and differential cases does not flow out.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: May 22, 2018
    Assignee: Musashi Seimitsu Industry Co., Ltd.
    Inventors: Yoichi Yanase, Tetsuro Hamada, Shinichi Murata
  • Patent number: 9929629
    Abstract: A rotating electrical machine includes a supporting member, a stator core, a winding set, a shaft, a rotor, a magnetic generator, and a magnetic detector. The stator core has a ring-shaped yoke held inside the supporting member and tooth portions projecting from the yoke in a radial inward direction of the yoke. The winding set is wound on the tooth portions. The shaft extends through the stator core and is rotatably supported by the supporting member. The rotor is located in the stator core and rotates with the shaft. The magnetic generator is located at an end of the shaft. The magnetic detector outputs a signal indicative of a change in magnetic flux density created by the magnetic generator. The number of the tooth portions for every magnetic pole pair in the rotor is even.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: March 27, 2018
    Assignee: DENSO CORPORATION
    Inventor: Makoto Taniguchi
  • Patent number: 9914325
    Abstract: A sealing device for a hub bearing assembly, equipped with a rolling bearing unit, a circular metal shield, a radially extending end wall and a double cylindrical lateral wall fixed to and practically orthogonal to the end wall, formed by a first cylindrical lateral wall and a second cylindrical lateral wall. The metal shield is angularly coupled to a radially outer ring of the bearing. The second cylindrical lateral wall is connected in a fixed manner to a radially outer edge adapted to cover an axially inner surface of the terminal edge that is potentially subject to oxidation phenomena with the consequent formation of a layer of rust.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: March 13, 2018
    Assignee: AKTIEBOLAGET SKF
    Inventors: Daniele Duch, Fausto Morello
  • Patent number: 9909347
    Abstract: A power, split door system (12) for a vehicle (10), comprising a first vehicle door (14) arranged to articulate between a closed position and an open position; a second vehicle door (16) arranged to articulate between a closed position and an open position; first (40a, 40b) and second (42) drive means for moving the first and second doors, respectively, between the closed and open positions; and control means (18, 83, 85, 87) for controlling the first and second drive means so as to control movement of the first and second doors between the open and closed positions; wherein the control means is provided with positional information relating to each of the first and second vehicle doors; and wherein the control means is configured to ensure that each of the first and second vehicle doors do not attempt to simultaneously occupy the same space. The first and second doors may be configured such that in a closed position, the first and second doors partially overlap.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: March 6, 2018
    Assignee: JAGUAR LAND ROVER LIMITED
    Inventors: Andrew Warburton, Duncan Loveday, Steven Thomas
  • Patent number: 9837880
    Abstract: A magnetic voltage/current limiting system is mounted in conjunction with a main coil, in a coil assembly of a wind turbine generator, for limiting the outputted voltage (or current) to a predetermined upper value. The limiting system generally has at least one limiting coil and a control circuit connected to the main coil. The limiting system is configured to be activated when the voltage (or current) outputted by the main coil increases beyond the predetermined upper value. Once activated, the limiting system diverts a portion of the outputted current to the limiting coil such as to generate a magnetic field in the limiting coil. This additional magnetic field generally limits the amount magnetic field generated by passing magnets to flow through the main coil, thereby limiting the outputted voltage.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: December 5, 2017
    Inventor: André Beaulieu
  • Patent number: 9825510
    Abstract: An electrical machine system includes a stator having a conical stator surface defining a rotary axis. A rotor is operatively connected to the stator for rotation relative thereto, wherein the rotor includes a conical rotor surface. A conical gap is defined between the conical surfaces of the stator and rotor about the rotary axis. An actuator is operatively connected to at least one of the stator and rotor for relative linear motion along the rotary axis of the stator and rotor to change the conical gap, wherein the actuator provides relative linear motion between a first position for a first conical gap width and a second position for a second conical gap width different form the first conical gap width. In both the first and second positions the full axial length of one of the rotor or stator is axially within the axial length of the other.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: November 21, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Joseph K. Coldwate, Andreas C. Koenig
  • Patent number: 9804286
    Abstract: Method of optimizing output of sensor for indicating location of metallic object. Sensor having primary electromagnetic coil to generate time varying magnetic field; secondary electromagnetic coil to detect time varying magnetic field as affected, by object to output, on basis of detected time varying magnetic field, signal indicative of location of object.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 31, 2017
    Assignee: ROLLS-ROYCE POWER ENGINEERING PLC
    Inventor: Angelo Sigona
  • Patent number: 9797452
    Abstract: A bearing includes a first ring, a second ring, at least one row of rolling elements arranged in a rolling chamber disposed between the first ring and the second ring, and a cap attached to the first ring that is configured to close the rolling chamber. At least one vibration sensor is attached on the inside of the cap, and the vibration sensor is mounted in a metal block connected to the cap.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: October 24, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Nicolaas Simon Willem Den Haak, Koos Welling, Jascha van Pommeren
  • Patent number: 9780627
    Abstract: An electric motor includes a stator, and a rotor which has a rotor shaft. At least one rotor position magnet is disposed on the rotor shaft, and is configured to provide a magnetic signal that can be evaluated, upon a rotation of the rotor shaft, at least for the purpose of determining a respective rotor position of the rotor. At least one carrier is disposed in a rotationally fixed manner on the rotor shaft, and is connected to the at least one rotor position magnet. The carrier includes at least one opening configured to compensate imbalance of the rotor.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: October 3, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Friedbert Weller, Peter Nadig, Klaus Dengler, Daniel Rombach, Bastian Kloer
  • Patent number: 9742328
    Abstract: A method for controlling an operation of a multi-phase electric machine with a stator and a rotor is disclosed. The stator or the rotor includes permanent magnets, whereas the rotor or the stator includes a plurality of conductor bars interconnected by connecting elements of at least one circuit board and disposed within a magnetic field of the permanent magnets and having an internal inductance connected. The connecting elements are arranged outside the magnetic field and have an external inductance. Each phase includes at least one of the conductor bars. The multi-phase electric machine is controlled by regulating for each phase of the multi-phase electric machine at least one electrical quantity, which is dependent on the internal and external inductance of a respective phase, to a desired value.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: August 22, 2017
    Assignee: AUDI AG
    Inventor: Stefan Maiwald
  • Patent number: 9719569
    Abstract: A brake is provided. The brake may include a rotor having a plurality of magnets and a plurality of ferromagnetic poles radially disposed thereabout, and a stator having a plurality of shunts and a plurality of teeth radially disposed thereabout. At least one of the plurality of shunts and the plurality of teeth may be configured to selectively move between an engagement state and a free engagement state. The teeth may be configured to generate magnetic flux with the ferromagnetic poles so as to generate a braking torque during the engagement state. The shunts may be configured to redirect the magnetic flux therethrough and reduce the braking torque between the teeth and the ferromagnetic poles during the free engagement state.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 1, 2017
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Zbigniew Piech, Kyle W. Rogers, Daryl J. Marvin
  • Patent number: 9716421
    Abstract: A resolver device includes a stator core and a rotor core supported so as to be freely rotatable with respect to the stator core and configured such that a reluctance component in a gap between the rotor core and the stator core changes in accordance with a relative angle position to the stator core. The stator core includes stator main poles and stator interpoles.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: July 25, 2017
    Assignee: NSK LTD.
    Inventors: Kazuhiro Ohira, Masaki Kuwahara
  • Patent number: 9705365
    Abstract: A motor includes a stator, a rotor, a case, and back-surface magnet portions. The rotor has a first rotor core, a second rotor core and a field magnet. Each of the first and second rotor cores has a core base and claw-shaped magnetic poles. The field magnet is sandwiched between the first rotor core and the second rotor core and causes the claw-shaped magnetic poles of the first rotor core and the second rotor core to function as different magnetic poles. The back-surface magnet portions include a second and a first back-surface magnet portions respectively provided on the back surfaces of the claw-shaped magnetic poles of the second rotor core and the first rotor core. Size of the second back-surface magnet portion differs from size of the first back-surface magnet portion are different from each other.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: July 11, 2017
    Assignee: ASMO CO., LTD.
    Inventors: Yoji Yamada, Koji Mikami, Takahiro Tsuchiya
  • Patent number: 9692279
    Abstract: An electrical rotating machine, such as a generator or motor, communicates power from a stationary location to the rotating rotor of the rotating machine via opposed pairs of capacitor plates, one plate of each pair rotating with the rotor and one plate of each pair fixed not to rotate. In one embodiment, separation between the plates of the pair is provided by a cushion of entrapped air.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: June 27, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Daniel Colin Ludois, Justin Kyle Reed, Kyle Hanson
  • Patent number: 9676086
    Abstract: A torque tool includes an electrical machine drive system, an electronic controller and a gear system. The drive system includes a rotor and a stator. The rotor includes a pattern of regions of relatively high magnetic permeability interspersed with regions of relatively low magnetic permeability extending generally parallel to the motor shaft such that there is a plurality of magnetic poles distributed circumferentially around the motor shaft. The stator includes electrical windings dispersed in slots disposed around an inner surface of the stator, the slots extending generally parallel to the motor shaft such that, when current flows in the windings, a stator magnetic field generated by the current has the same number of magnetic poles as the rotor. The electronic controller is configured to control the current flow in the stator windings to cause the stator poles to rotate in synchronism with rotation of the motor.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: June 13, 2017
    Assignee: Norbar Torque Tools Ltd.
    Inventors: Charles Pollock, Helen Pollock
  • Patent number: 9673669
    Abstract: A brushless motor includes a rotor. The rotor includes a first rotor core, a second rotor core and a field magnet. The first rotor core includes a plurality of first magnetic pole portions arranged in a circumferential direction. The second rotor core includes a plurality of second magnetic pole portions arranged in the circumferential direction. The field magnet is arranged between the first rotor core and the second rotor core in an axial direction. When the field magnet is magnetized in the axial direction, the first magnetic pole portions function as first magnetic poles and the second magnetic pole portions function as second magnetic poles.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: June 6, 2017
    Assignee: ASMO CO., LTD.
    Inventors: Yoji Yamada, Koji Mikami, Chie Morita, Takahiro Tsuchiya, Seiya Yokoyama, Takayoshi Suzuki
  • Patent number: 9653963
    Abstract: A direct drive for a rotation machine, particularly for a container treatment machine, this drive including a fixed machine part (1) and a machine part (2) rotating around a vertical machine axis, wherein the rotating machine part (2) is rotationally connected to the fixed machine part (1) by a roller bearing (3) arranged between the two machine parts (1, 2) and having an outer bearing ring (4), an inner bearing ring (5) and a plurality of rolling elements rolling between said bearing rings (4, 5), and can be driven by a torque motor (7). On the rotating machine part (1), a plurality of magnets (8) is provided, surrounding the rotating machine part, while on the fixed machine part (1), a stator (12) formed of a plurality of electric coils (9, 10, 11) is arranged, such that the rotating machine part (2) can be set in a defined rotational motion through an electromagnetic field generated when the stator (12) is energized in cooperation with the magnets (8).
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: May 16, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Gunter Schmid, Thomas Dittenhofer, Ralf Schuler
  • Patent number: 9624938
    Abstract: An electric submersible well pump assembly includes a rotary pump and an electrical motor. The motor has a motor housing filled with a dielectric lubricant. A stator formed of a stack of stator disks with a stator bore is stationarily mounted within the motor housing. A motor shaft extends through the bore. A rotor is mounted to the shaft for rotating the shaft and has a stack of rotor disks. Axially spaced-apart radial stabilizing portions along the rotor have outer peripheries that are greater in outer diameter than remaining portions of the rotor. The outer peripheries of the stabilizing portions rotate with the rotor and are closely spaced to the inner diameter of the stator to radially stabilize the shaft.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: April 18, 2017
    Assignee: Baker Hughes Incorporated
    Inventor: Michael A. Forsberg
  • Patent number: 9620997
    Abstract: The present invention relates to a flux-switching machine, including a stator having phase windings and field coils, wherein, in the machine, at least one field coil is arranged in a pair of notches separated by at least three teeth.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: April 11, 2017
    Assignee: MOTEURS LEROY-SOMER
    Inventors: Philippe Manfe, Benjamin Gaussens
  • Patent number: 9614414
    Abstract: The present invention provides a driving device and an electric motorcycle driving system using the driving device. Said driving device comprises a shaft, a pulley disk assembly configured on the shaft, and a motor. The motor is an outer rotor or inner rotor motor. One pulley disk of the pulley disk assembly is connected to one end of the outer rotor sleeve or the inner rotor of the motor, so it can be driven by the outer rotor sleeve or the inner rotor and rotate or move around the shaft; furthermore, an electric motorcycle driving system can use the driving device to connect with a battery and a stepless speed change mechanism, so as to use the electric power of the battery to operate the stepless speed change mechanism, and to consequently enhance the performance of speed and torque output of the electric motorcycles.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: April 4, 2017
    Assignee: National United University
    Inventor: Yu-Chi Wu
  • Patent number: 9577479
    Abstract: Disclosed herein is a design for flux switching machines with one or more armature windings which can deliver controlled torque, in either selected direction on start up, without the use of a mechanical position sensor. Flux switching machines without sensors can operate equally well in either direction. The invention discloses design features for such machines which improves the torque profile of the motor with angle. In three phase machines this delivers higher torque and lower ripple torque. In single phase flux switching machines the invention allows the rotor to be placed in a position where maximum torque can be delivered in either direction by selection of either positive or negative armature current. Rotor slotting is introduced to create a path of low permeability across a rotor tooth with minimal impact on the normal torque producing flux paths. Asymmetry of stator slots is used to further create a stable rotor position when energized by predominantly field means or armature means.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: February 21, 2017
    Assignee: TECHNELEC LTD.
    Inventors: Charles Pollock, Helen Pollock
  • Patent number: 9500500
    Abstract: The number of turns and the winding direction of a cosine-phase coil wound around an i-th tooth and the number of turns and the winding direction of a sine-phase coil wound around the i-th tooth are set according to Tc,i=TSmax cos(ms?i+?2)+T2c cos(me?i+?1) and Ts,i=TSmax sin(ms?i+?2)+T2s cos(me?i+?1), respectively, where TSmax: a first reference number of turns of each of the detecting coils of each phase, T2c: a second reference number of turns of each of the cosine-phase coils, T2s: a second reference number of turns of each of the sine-phase coils, me: a pole pair number in a magnetic flux distribution formed by the exciting coils, ms: a pole pair number in each magnetic flux distribution formed by the detecting coils of each phase, ?1: the phase of the exciting coils, ?2: each phase of the cosine-phase coils and the sine-phase coils, and ?i: a mechanical angle of the i-th tooth.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: November 22, 2016
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Hiroki Ookawara, Toshifumi Yoshikawa, Hirokuni Wakui, Kenichi Nakazato, Manabu Yazaki