Adjustable Magnetic Structure Patents (Class 310/191)
  • Patent number: 10814960
    Abstract: A dynamic rotor-phasing unit can phase rotors in-flight for dynamic rotor tuning and in an idle state for aircraft storage. The input and output shafts can be clocked (e.g., rotated) from 0 degrees apart to in excess of 360 degrees apart or from 0 degrees apart to 140 degrees apart. Such rotation can minimize the footprint of an aircraft for stowing purposes, as the rotor blades can be folded to fit within a smaller area without disconnecting the drive system. Additionally, the unit can allow tiltrotor blades to be clocked during flight, which can allow the live-tuning of the aircraft's rotor dynamics. A fail-safe rotary actuator can rotate a stationary planet carrier to clock the input shaft and the output shaft. Alternatively, an actuator can position a slider housing to clock the input shaft and the output shaft.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: October 27, 2020
    Assignee: Bell Textron Inc.
    Inventors: Colton Gilliland, Tyson Henry
  • Patent number: 10763713
    Abstract: An electric motor including: a first and second subsystems, one of which is a magnetic rotor assembly and the other of which is a coil stator assembly; a hub assembly supporting the magnetic rotor assembly and the coil stator assembly and defining an axis of rotation; and a bearing assembly supporting at least one of the first and second subsystems on the hub assembly, wherein the first subsystem has an array of lift-generating elements for generating axially directed magnetic fields, the second subsystem has an electrically conductive region aligned with and opposite to the array of lift-generating elements of the first subsystem, and wherein the bearing assembly enables the magnetic rotor assembly to rotate about the rotational axis of the hub assembly and enables the separation distance of the magnetic rotor assembly from the coil stator assembly to change.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: September 1, 2020
    Assignee: Indigo Technologies, Inc.
    Inventors: Rachel A. Dias Carlson, Scott T. Purchase
  • Patent number: 10693357
    Abstract: A starter motor for starting up an engine mounted to a straddled vehicle. The starter motor includes a rotor, a brush in contact with the rotor to cause a current supplied thereto, and a movable permanent magnet arranged to oppose a core of the rotor with a gap therebetween and to be movable in a circumferential direction of the rotor within an angle range. The angle range includes a retarded angle position and an advanced angle position in which the movable permanent magnet is displaced respectively in a retarded and advanced angle direction relative to the brush. The movable permanent magnet is located in the advanced angle position when the rotor starts to rotate upon a supply of the current to the rotor, and to be moved in the retarded angle direction to the retarded angle position within a period in which the rotor is rotating with the current supplied to the rotor.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: June 23, 2020
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Haruyoshi Hino
  • Patent number: 10598161
    Abstract: A generator is provided. The generator includes a barrel rotated by being applied with a driving force from an external force, a converter applied with a torque of the barrel to rotate a rotating shaft at a constant rotation speed; and an electrostatic generator driven by being applied with the torque from the rotation shaft.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: March 24, 2020
    Assignee: University-Industry Cooperation Group of Kyung Hee University
    Inventors: Dukhyun Choi, Wook Kim
  • Patent number: 10476331
    Abstract: The present disclosure provides a rotor of the wound rotor driving motor including: a first core body having an outer surface and an inner surface, wherein the first core body forms a space inside of the first core body; a second core body being inserted into inside of the first core body, wherein the second core body contacts with the inner surface of the first core body; and a coil assembly combined to the second core body in a radial direction.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: November 12, 2019
    Assignee: Hyundai Motor Company
    Inventors: SangHwa Do, Jae Bum Park, Hee Ra Lee, Kyoungbum Kim
  • Patent number: 10014813
    Abstract: A method is provided for switching on and switching off an n-phase electric machine in a motor vehicle. The n-phase electric machine includes a rotor with a rotor winding, and a stator with an n-phase stator winding. An excitation current may be applied to the rotor, and an n-phase phase voltage may be applied to the stator. The excitation current is switched on or off, a parameter which influences a synchronous generated internal voltage is determined, and the phase voltage is switched on or off when the parameter which influences the synchronous generated internal voltage reaches a certain threshold value.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: July 3, 2018
    Assignees: ROBERT BOSCH GMBH, SEG AUTOMOTIVE GERMANY GMBH
    Inventors: Zoltan Ersek, Julian Roesner
  • Patent number: 9998062
    Abstract: An axial flux permanent magnet machine including a pair of axially spaced first components. A second component positioned axially between and equidistant from the first components. Either the pair of first components or the second component is arranged to rotate about a shaft. A translation mechanism coupled to each of the first components. The translation mechanism configured to translate the first components axially away from the second component. Also a method of controlling an axial flux permanent magnet machine.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: June 12, 2018
    Assignee: ROLLS-ROYCE plc
    Inventors: Sivakumar Nadarajan, Ellis F H Chong
  • Patent number: 9853528
    Abstract: Systems and methods are provided for an induction motor. An induction motor includes a spherical rotor and a plurality of curved inductors positioned around the spherical rotor. The plurality of curved inductors are configured to rotate the spherical rotor continuously through arbitrarily large angles among any combination of three independent axes.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: December 26, 2017
    Assignee: Carnegie Mellon University, CTTEC
    Inventors: Ralph L. Hollis, Jr., Masaaki Kumagai
  • Patent number: 9845234
    Abstract: Provided is a refrigerator including a main body providing a storage, a dispenser provided to the main body and configured to dispense water or ice, an operable operation part provided to the dispenser, and a dispenser motor driven according to operating the operation part, wherein the dispenser motor includes, a stator generating a magnetic field, a rotator rotatable by the magnetic field, and a compression member applying a frictional force to the rotator while rotation of the rotator is stopped. The dispensing of water or ice is quickly stopped by stopping the operating of the operation part.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: December 19, 2017
    Assignee: LG Electronics Inc.
    Inventor: Sung-Kyoung Kim
  • Patent number: 9843237
    Abstract: An electromechanical flywheel machine includes a flywheel mass enclosed in an evacuable housing.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: December 12, 2017
    Assignee: Rotonix Hong Kong Limited
    Inventors: Claude Michael Kalev, Robert A. Rosen
  • Patent number: 9751622
    Abstract: A wheel motorization system, useable for an aircraft to run along a ground surface, includes an electric motor, a driving member securable with a hub of a wheel of the aircraft, and a clutch device connecting an output shaft of the motor to the driving member via a reduction device. The clutch device includes a freewheel device, which allows transmission of a rotational torque only in a first torque transmission direction when the aircraft is travelling forwards.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: September 5, 2017
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Claude Blanc, Olivier Essinger
  • Patent number: 9735645
    Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: August 15, 2017
    Assignee: Saint Augustin Canada Electric Inc.
    Inventor: Cheruvari Karthik Hari Dharan
  • Patent number: 9543064
    Abstract: An electric machine includes a first magnetic pole with an arrangement of interposed magnetically active layers and magnetically inactive layers, and a second magnetic pole movable relative to the first magnetic pole and spaced from the first magnetic pole by a gap. An electrical conductor operates as a coupling element between an electrical circuit and a magnetic circuit. At an operating time, a common useful magnetic flux for electromechanical energy conversion flows through the magnetic circuit composed of the first magnetic pole, the gap and the second magnetic pole. The magnetically inactive layers have a lower average density than the magnetically active layers. A ratio (k) of the total volume of the magnetically active layers to the combined total volume of the magnetically active and inactive layers fulfills the condition 0.5?k?0.8 A method for producing an electric machine are also disclosed.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: January 10, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Zeljko Jajtic, Gerhard Matscheko
  • Patent number: 9413202
    Abstract: The invention relates to a stator for an electric motor having a base body composed of stator laminates which are axially in layers with respect to a motor axis and having a number of frame-like coil formers which are fitted with stator windings, with the coil cross-sectional surfaces of said frame-like coil formers essentially being directed at the motor axis. It is proposed that in order to fit them, the coil formers can first of all be placed obliquely with respect to a final position on coil former holders of the base body and can then be aligned in the final position, and in that the arrangement is designed such that the alignment involves axial bracing of the stator laminates.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: August 9, 2016
    Assignee: Brose Fahrzeugteile GmbH & Co. KG, Wuerzburg
    Inventors: Klaus Zaps, Peter Hauck
  • Patent number: 9356497
    Abstract: Methods and systems of downhole power generation are disclosed. The method includes the steps of rotating a magnet assembly about an axis relative to a coil assembly at a first rotational velocity, axially moving the magnet assembly to a first position on the axis with a configurable actuator so as to adjust a magnetic interaction between the magnet assembly and the coil assembly, and providing a power output from the coil assembly at a first power output level corresponding to the first position while the magnet assembly is rotating at the first rotational velocity.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: May 31, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Larry DeLynn Chambers
  • Patent number: 9267731
    Abstract: Provided is a refrigerator including a main body providing a storage, a dispenser provided to the main body and configured to dispense water or ice, an operable operation part provided to the dispenser, and a dispenser motor driven according to operating the operation part, wherein the dispenser motor includes, a stator generating a magnetic field, a rotator rotatable by the magnetic field, and a compression member applying a frictional force to the rotator while rotation of the rotator is stopped. The dispensing of water or ice is quickly stopped by stopping the operating of the operation part.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: February 23, 2016
    Assignee: LG Electronics Inc.
    Inventor: Sung-Kyoung Kim
  • Patent number: 9257879
    Abstract: Discloses is a motor for an environmentally friendly vehicle. In particular, the motor includes a stator core including a first coating portion and a second coating portion. The first portion and the second coating portion are adjacent to each other, wound with a coil on an outside thereof and fixedly installed in a motor case and the first coating portion is thinner than the second coating portion. The motor also includes a rotor core configured to move between the first coating portion and the second coating portion depending upon a speed of the motor. A controller is configured to control an operation of an actuator to move the rotor between the first coating portion and the second coating portion to maximize the efficiency of the motor depending upon the speed of the motor.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: February 9, 2016
    Assignee: Hyundai Motor Company
    Inventors: Young Jin Seo, Dong Yeon Han, Myeong Kyu Jung
  • Patent number: 9252634
    Abstract: The synchronous motor includes a rotor including a rotor core constituted of segment poles disposed in a ring and a stator including a stator core disposed radially outward or inward of the rotor with a gap therebetween and a multiple-phase stator winding wound on the stator core. Each of the segment poles has a magnetic salient pole characteristic. The rotor is rotated in synchronization with a rotating magnetic field generated when the multiple-phase stator winding is applied with a multiple-phase AC voltage. The lamination thickness as an axial length of the stator core is shorter than the lamination thickness as an axial length of the rotor core.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: February 2, 2016
    Assignee: DENSO CORPORATION
    Inventors: Keiji Kondou, Shin Kusase, Takeo Maekawa
  • Patent number: 9013079
    Abstract: The present invention relates to a permanent magnet generator for outputting a stabilized electromotive force. More specifically, the permanent magnet generator for stabilizing an electromotive force outputs an electromotive force stably according to the rotation speed of a motor and stabilizes the wave form of the electromotive force to be close to sine waves.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: April 21, 2015
    Inventor: Tae whan Do
  • Patent number: 8946966
    Abstract: An electric rotating machine is provided. A tooth portion of a stator is divided into a first tooth portion and a second tooth portion that are movable relative to each other between a first position, in which a magnetic resistance between the first and second tooth portions is small, and a second position, in which the magnetic resistance is relatively large. In a state in which the second tooth portion is in the second position, a region from a stator yoke portion side end of a current-carrying winding disposed around the tooth portion to a rotor side end of a winding arrangeable region is divided into a first region and a second region. A current-carrying winding space factor in the first region is set to be relatively smaller than in the second region.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: February 3, 2015
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Tsukasa Shimizu, Haruyoshi Hino
  • Patent number: 8922086
    Abstract: A synchronous electric machine having a fixed stator, a multi-phase stator winding and having a rotor which has poles, excited in a predefined sequence, over its circumference, the number of poles being changeable as a function of the intensity and the direction of a field current in at least one field coil of the rotor. For improving the efficiency of the machine and for reducing the number of field coils and the entire coil cross section it is provided that the rotor has a laminated core, laminated in the axial direction, which has grooves on the circumference for accommodating the at least one field coil and that the at least one field coil is situated on the circumference of the rotor with a step size which corresponds to the pole pitch of the lower number of poles.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: December 30, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Kurt Reutlinger
  • Patent number: 8912680
    Abstract: A rotary electric machine for a wind power turbine for generating electric power has a tubular stator having a plurality of stator segments; a tubular rotor which has a plurality of rotor segments, is located inside the tubular stator, and rotates about an axis of rotation with respect to the tubular stator; a sleeve located at least partly inside the tubular rotor and connectable to a supporting frame of the wind power turbine; and a bearing located inside and fixed to the sleeve, and which supports the tubular rotor rotating with respect to the sleeve.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: December 16, 2014
    Assignee: Wilic S.AR.L.
    Inventors: Emmanuele Gelmini, Matteo Casazza
  • Patent number: 8894382
    Abstract: A handheld blower apparatus includes a housing (2), an axial blower (6) which conveys air through a blower tube (7), and an electric drive motor (4). The drive motor (4) has a rotor (22) and a stator (21) and rotatably drives a drive shaft (16) and at least one fan wheel (23) of the axial blower (6). A simple construction results when the drive shaft (16) is rotatably mounted in the housing (2), when the rotor (22) of the drive motor (4) is connected to the drive shaft (16) in a rotatably fixed manner and the stator (21) of the drive motor (4) is rotatably mounted on the drive shaft (16). The stator (21) is supported relative to the housing (2) to prevent rotation and can tilt in a limited manner relative to the housing (2).
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: November 25, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Andreas Binder
  • Patent number: 8884486
    Abstract: A method for regulating the reactive power generated or absorbed by a synchronous electric generator includes regulating a quantity of coils disposed in line with a stator winding. Additionally, a generator operating point of the generator is regulated.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: November 11, 2014
    Assignee: Alstom Technology Ltd.
    Inventor: Johann Haldemann
  • Publication number: 20140312730
    Abstract: A rotary electric machine includes: a stator; a rotor; a control device that causes the stator to generate a rotating magnetic field; and a magnetic flux supply element supported by a rotary shaft so as to be rotatable relative to the rotary shaft, disposed radially inward of the rotor across a gap, and having auxiliary magnets. Each auxiliary magnet is formed such that opposite end portions thereof in the circumferential direction are radially opposed to holding magnets when the relative rotation angle of the magnetic flux supply element is a strengthening angle. The control device executes field weakening control or field strengthening control, thereby changing the relative rotation angle of the magnetic flux supply element.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 23, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Yoshiyuki SHIBATA, Yutaka MORI
  • Patent number: 8823331
    Abstract: A permanent magnet generator having the unique feature of a speed proportionally adjusted air gap for self-regulation of coil output voltage over a wide range of operating rotational speed of a steam turbine to which the invention is coupled. The Permanent Magnet Generator rotor is supported by the turbine end shaft and the stator is supported by a bracket bolted to the turbine pedestal base or other rigid structure. The speed proportional air gap is accomplished through the use of a plurality of centrifugal flyweights in mechanical coupling to a spool piece under spring load and to corresponding rare earth magnets via linkage such that increasing rotor speed extends the flyweights outward from the rotor center of rotation and draws the rare earth magnets closer to the rotor center of rotation and thus increases the air gap.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: September 2, 2014
    Assignee: Lovejoy Controls Corporation
    Inventor: Kim A. Lovejoy
  • 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: 8736128
    Abstract: Electromagnetic devices and near field plates for three-dimensional magnetic field manipulation are disclosed. In one embodiment, an electromagnetic device includes a rotor, a stator, and a magnetic field focusing device. The rotor may include a rotor body and a plurality of radially extending rotor poles. The stator may include a plurality of stator poles radially extending inwardly from a stator body toward the rotor body. Each stator pole may have a magnetic flux generating device and a stator pole tip, wherein an air gap may be located between each stator pole tip and each corresponding rotor pole. The magnetic field focusing device is coupled to at least one stator pole tip and produces a magnetic field profile having at least one concentrated magnetic flux region proximate the stator pole tip. The magnetic field focusing device twists the magnetic field profile by an angle ?.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: May 27, 2014
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Ercan Mehmet Dede, Jaewook Lee, Debasish Banerjee
  • Publication number: 20140069151
    Abstract: A motor may adjust interlinkage magnetic flux of a rotor and a stator so as to rotate at high speed by lowering torque during a dehydration operation of a washing machine. The motor includes a rotor in which a plurality of magnets and a plurality of rotor cores are alternately arranged in a circumferential direction of the rotor, the plural magnets being magnetized in the circumferential direction so that the same polarities thereof face each other, a stator around which a coil is wound, and a magnetic flux adjustment member to adjust interlinkage magnetic flux of the rotor and the stator by adjusting leakage magnetic flux. The magnetic flux adjustment member includes a ring-shaped variable magnetic substance, and a pressing member which presses the magnetic substance and varies the shape thereof.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 13, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Keun Young YOON, Young Kwan KIM
  • Patent number: 8541922
    Abstract: A magnetic transmission assembly is adapted to integration with a motor or generator. The magnetic transmission assembly includes a rotor, a stator, and a magnetically conductive element. The rotor and the stator are sleeved coaxially and respectively have R and ST1 pole pairs. The magnetically conductive element is located between the rotor and the stator, and has permeable regions. When the magnetically conductive element is actuated, the magnetically conductive element selectively enables PN1 or PN2 permeable regions to be corresponding to the rotor and the stator. The permeable regions corresponding to the rotor and the stator interact with magnetic fields of the R and ST1 pole pairs to generate a predetermined variable-speed ratio. The magnetic transmission assembly can be integrated into the motor, so as to improve the drive power density.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: September 24, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Ming-Tsan Peng, Li-Ju Cheng
  • Patent number: 8536751
    Abstract: An electromagnetic device has a stator and a rotor rotating between facing surfaces of the stator and bearing a plurality of magnets distributed at regular intervals along its periphery. The magnets are so arranged that they form a sequence of alternately opposite poles on the surfaces of the rotor directed towards the stator, and the stator comprises two sets of independently supported magnetic yokes located at both sides of the rotor in front of the magnets. The magnetic yokes have two axially oriented arms, the end surfaces of which, in static conditions of the rotor, at least partly face a pair of successive magnets on a same surface of the rotor.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: September 17, 2013
    Assignee: AVIO S.p.A.
    Inventor: Marco Cipriani
  • Patent number: 8536752
    Abstract: A permanent magnet generator comprises a stator core, a plurality of windings situated on the stator core, and a plurality of stress elements. The stress elements apply or relieve mechanical stress in response to control signals from a generator controller, thereby increasing or reducing voltage across the stator windings.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: September 17, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Shin Katsumata, Jacek F. Gieras
  • Patent number: 8536750
    Abstract: A mechanical structure (16) for enabling a rotor (28) in a permanent magnet electric motor A to be moved axially relative to a stator (14) under an actuating force, without experiencing frictional sliding during such a movement. As the rotor (28) is moved away from the stator (14), the motor magnetic field is weakened, enabling the motor A to operate efficiently at elevated speeds, extending speed coverage under constant power.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: September 17, 2013
    Assignee: The Timken Company
    Inventors: Xiaolan Ai, Richard Knepper, Don Remboski, Chris Van Dress, Brad Mularcik
  • Patent number: 8513839
    Abstract: A fan with damper includes a motor and a fan located in a duct ventilation passage. The motor is connected with the fan to drive the fan and move air or other gases through the duct. The motor has a drive shaft that slides along its length between on and off positions. A damper is also located in the passage, is operatively connected with the drive shaft such that the damper moves to an open position when the drive shaft slides to its on position and the damper moves to a closed position when the drive shaft slides to its off position.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: August 20, 2013
    Inventors: John L Larson, Steven J Larson
  • Patent number: 8459245
    Abstract: An electronically controlled, brushless DC, electromagnetic induction drive apparatus for use in a paintball marker active loader capable of directly driving the feeder element in the active loader while providing independently user selectable torque transfer capability and rotational speed whether used to continuously or intermittently rotate the loader feeder element. A plurality of selectively polarity reversible electromagnets are disposed in the loader housing and act to move a plurality of magnetic drive elements disposed on the rotating feed cone to rotate the feed cone a predetermined amount for each polarity cycle and cause paintballs to be fed into the paintball marker via a feed tube. A controller linked to the marker firing sequence manages the number and frequency of the sequential polarity changes of the electro-magnets to cause the feed cone to rotate in response to sensed movement of paintballs in the feed tube.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: June 11, 2013
    Inventors: Michael J. Fiorill, Donald Lee Kulp
  • Patent number: 8390162
    Abstract: A reconfigurable electric motor includes rotatable permanent magnets in a rotor, the magnets having a first position producing a weak magnetic field and a second position producing a strong magnetic field. The motor is reconfigurable from an asynchronous induction motor at startup into a synchronous motor for efficient operation. The motor includes a squirrel cage for induction motor operation at startup with the permanent magnets positioned to product the weak magnetic field to not interfere with the startup. When the motor reaches sufficient RPM, the permanent magnets rotate to produce a strong magnetic field for high efficiency synchronous operation. The permanent magnets are magnetically biased to come to rest in the weak magnetic field position and a centrifugal mechanism holds the magnets in the weak magnetic field position until sufficient RPM are reached for transition to synchronous operation.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: March 5, 2013
    Inventors: Louis J. Finkle, Andrea Furia
  • Patent number: 8312871
    Abstract: An electronically controlled, brushless DC, electromagnetic induction drive apparatus for use in a paintball marker active loader capable of directly driving the feeder element in the active loader while providing user selectable torque transfer capability and rotational speed whether used to continuously or intermittently rotate the loader feeder element. A plurality of selectively polarity reversible electromagnets are disposed in the loader housing and act to move a plurality of magnetic drive elements disposed on the rotating feed cone to rotate the feed cone and cause paintballs to be fed into the paintball marker via a feed tube. A controller linked to the marker firing sequence manages the sequential polarity changes of the electro-magnets to cause the feed cone to rotate in response to movement of paintballs in the feed tube.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: November 20, 2012
    Inventors: Donald Lee Kulp, Robert E. Long, Jr., Michael J. Fiorill
  • Publication number: 20120286615
    Abstract: A permanent-magnet electrical machine is disclosed in which the rotor or stator have at least one movable iron segment. A magnetic field of the electric machine is weakened when the movable iron segment is moved a position away from the rotor or stator, respectively. When the movable iron segment is in a first position, such as in contact with the rotor or stator, the field strength is high. When the movable iron segment is in a second position in which the movable iron segment is displaced away from the rotor or stator, the field strength is low. The ability to weaken the field strength causes the constant-power, speed ratio to be increased and thereby increases the utility of the electric machine for applications in which a wide speed range is desired. The electric machine may be used as both a permanent-magnet motor and generator.
    Type: Application
    Filed: July 20, 2012
    Publication date: November 15, 2012
    Applicant: CURRENT MOTOR COMPANY, INC.
    Inventor: Erik Kauppi
  • Publication number: 20120286616
    Abstract: A clutch mechanism moving together with an actuator allows coupling or decoupling an inner rotor to or from a power shaft, thereby controlling a rotation angle. This structure allows a polarity of a magnetic pole of the inner rotor to be the same as that of an opposing magnetic pole of an outer rotor when the motor is driven at a low rpm, so that magnetic fluxes inter-linking with windings can be increased, which results in greater torque. When the motor is driven at a high rpm, the structure allows the polarity of the magnetic pole of the inner rotor to be different from that of the opposing magnetic pole of the outer rotor, so that an amount of leakage flux is increased, and the magnetic fluxes inter-linking with the winding are decreased. As a result, an induction voltage is lowered and a high rpm range is widened.
    Type: Application
    Filed: March 7, 2011
    Publication date: November 15, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami, Hideaki Matsuo, Yuichiro Tashiro
  • Publication number: 20120264554
    Abstract: An electric motor assembly includes a rotor hub, and a rotor supported on the rotor hub. The rotor hub has first and second hub portions, and the rotor has first and second annular rotor segments supported for rotation on the respective first and second hub portions. Each of the rotor segments has a respective set of magnets spaced circumferentially therearound. The rotor hub and the rotor segments are configured so that at least one of the rotor segments moves about the axis of rotation relative to the other of the rotor segments as the rotor hub rotates. The movement of the at least one of the rotor segments is an amount that increases as the speed of the rotor hub increases to reduce back electromotive force. The movement may be due to centrifugal force, which increases as speed increases, without requiring a control system to effect the movement.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Peter J. Savagian, Alan G. Holmes, Mark A. Theobald
  • Patent number: 8288908
    Abstract: A reconfigurable electric motor includes a rotor containing rotatable permanent magnets or non-magnetically conducting shunting pieces. The magnets and/or shunting pieces have a first position producing a weak magnetic field for asynchronous induction motor operation at startup and a second position producing a strong magnetic field for efficient synchronous operation. The motor includes a squirrel cage for induction motor operation at startup with the permanent magnets and/or shunting pieces positioned to product the weak magnetic field to not interfere with the startup. When the motor approaches or reaches synchronous RPM, the permanent magnets and/or shunting pieces rotate to produce a strong magnetic field for high efficiency synchronous operation.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: October 16, 2012
    Inventors: Louis J. Finkle, Andrea Furia
  • Patent number: 8269389
    Abstract: An electrical energy generator for generating optimal electrical energy at very low wind speeds and at very high wind speeds. The electrical energy generator includes a support assembly having an elongate support member, and also includes a rotor assembly being rotatably disposed upon the support assembly and having a plurality of vanes being movable by air for rotating the rotor assembly, and further includes a stator assembly being mounted upon the support assembly and including a stator member being movably disposed upon the support assembly for generating energy in cooperation with the rotor assembly, and an assembly for moving the stator member relative to the rotor assembly upon the support assembly.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: September 18, 2012
    Inventor: Cris D. Somerville
  • Patent number: 8242653
    Abstract: A rotor surface has magnetic salient poles and island-shaped magnetic poles alternately in circumferential direction, and the island-shaped magnetic pole is constituted so that a magnetic flux coming from an external source does not flow through. A magnetic excitation part magnetizes the island-shaped magnetic poles and the magnetic salient poles collectively in the same direction, and then control a flux amount flowing through an armature. The armature has armature coils that face the magnetic salient pole and the island-shaped magnetic pole simultaneously so that driving torque fluctuation or power generation voltage waveform distortion is controlled. The magnetic excitation part changes magnetization state of a field magnet irreversibly, or changes an excitation current to an excitation coil to control a flux flowing through the armature.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: August 14, 2012
    Assignee: Kura Laboratory Corporation
    Inventor: Yoshikazu Ichiyama
  • Patent number: 8242736
    Abstract: A device and method for matching the rates of speed at which an electric motor that is drivingly connected to a worm gear raises and lowers a window in an automobile power window assembly. By axially displacing the motor's armature, and/or by varying the thread and tooth profiles of the worm and the gear, the amount of torque produced by the motor and transmitted through the worm gear can be altered. In order to compensate for the effect of gravity on the motor load and on the window's speed of ascent and descent, more torque is provided when the window is being raised and less torque is provided when the window is being lowered.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: August 14, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Joseph Whinnery, Dave Peterson, Ken Burns
  • Patent number: 8228020
    Abstract: An apparatus and method for controlling a hybrid motor, The hybrid motor, uses a permanent magnet instead of a field coil for a rotor, winds a coil round a stator in a multi-phase independent parallel manner, fixes a rectifying type encoder to the rotor and connects a sensor to a driving circuit. The apparatus comprises: an encoder attached to a rotor in cooperation with a pole sensor a speed input unit for generating a speed instruction signal a power switching circuit to generate motor driving signals; a drive module receiving the speed instruction signal and the sensor signal and outputting the speed instruction signal synchronized with the sensor signal as a driving motor signal; a power supply for applying a DC voltage to the power switching circuit; A logic power supply for converting the DC voltage into a logic voltage, and applying logic voltage to the drive module. The motor has n phases, n power switching circuits and n drive modules.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: July 24, 2012
    Assignee: Eni Co., Ltd.
    Inventors: Dong-Ryul Shin, Pyeong-Hun Cho
  • Patent number: 8222789
    Abstract: A brushless D.C. disk motor has one or more disk rotor assemblies and pairs of stator assemblies for each rotor assembly. Each disk rotor assembly has a disk and a plurality of permanent magnets distributed along two or more circular paths in the disk inboard of the peripheral edge of the rotor. Each stator assembly has a plurality of pole pieces and coils distributed along a mounting plate in corresponding circular paths. The disk is rotatably mounted to a support member; while the stator sub-assemblies are fixed to the support member. The coils are selectively activated by commutated power control signals generated in response to a vehicle condition parameter, such as vehicle speed or disk motor load, to optimize power drain from the source of electrical power in accordance with the value of the vehicle condition parameter. The stator assembly pole pieces are movably mounted on the stator mounting plate to improve motor efficiency.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: July 17, 2012
    Assignee: Silicon Valley Micro M Corporation
    Inventors: Shengbo Zhu, Su Shiong Huang
  • Patent number: 8207645
    Abstract: In a magnet-exciting rotating electric machine system, a rotor surface has magnetic salient poles and island-shaped magnetic poles alternately in circumferential direction, and the island-shaped magnetic poles are constituted so that magnetic flux coming from an external source does not flow through. A magnetic excitation part magnetizes the island-shaped magnetic poles and the magnetic salient poles collectively in the same direction, and then control a flux amount flowing through an armature. The armature has armature coils that face the magnetic salient pole and the island-shaped magnetic pole simultaneously so that driving torque fluctuation or power generation voltage waveform distortion is controlled. The magnetic excitation part changes magnetization state of a field magnet irreversibly, or changes an excitation current to an excitation coil to control a flux crossing the armature.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: June 26, 2012
    Assignee: Kura Laboratory Corporation
    Inventor: Yoshikazu Ichiyama
  • Patent number: 8198774
    Abstract: A motor includes: a stator (12) having coils; a rotor (11), which is disposed inside the stator and has a plurality of magnets; and a magnetic path switching part (18), which is provided in the rotor (11) and switches a magnetic path of the rotor (11) to select intense field control as a forward salient-pole structure or weak field control as an inverse salient-pole structure. The magnetic path switching part (18) is formed by use of a member having magnetic anisotropy, which is arranged on a magnetic path connecting magnets (13) of the same pole and a magnetic path connecting magnets (13) of different poles in the rotor (11). By changing the magnetic anisotropy of the member, the forward salient-pole structure and the inverse salient-pole structure are switched therebetween.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: June 12, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Takashima, Yuki Nakajima
  • Patent number: 8188629
    Abstract: A magnetic transmission assembly is adapted to integration with a motor or generator. The magnetic transmission assembly includes a rotor, a stator, and a magnetically conductive element. The rotor and the stator are sleeved coaxially and respectively have R and ST1 pole pairs. The magnetically conductive element is located between the rotor and the stator, and has steel pieces. When the magnetically conductive element is actuated, the magnetically conductive element selectively enables PN1 or PN2 steel pieces to be corresponding to the rotor and the stator. The steel pieces corresponding to the rotor and the stator interact with magnetic fields of the R and ST1 pole pairs to generate a predetermined variable-speed ratio. The magnetic transmission assembly can be integrated into the motor, so as to improve the drive power density.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: May 29, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Ming-Tsan Peng, Li-Ju Cheng
  • Publication number: 20120126740
    Abstract: A permanent-magnet electrical machine is disclosed in which the rotor has a fixed back iron and movable back iron segments. When the movable back iron segments are in a first position, such as in contact with the fixed back iron, the field strength is high. When the movable back iron segments are in a second position in which the movable back iron segments are displaced away from the fixed back iron, the field strength is low. The ability to weaken the field strength causes the constant-power, speed ratio to be increased and thereby increases the utility of the motor for applications in which a wide speed range is desired. The disclosure applies to both permanent-magnet motors and generators. In an alternative embodiment, the stator ring is provided with a fixed portion and at least one movable stator segment.
    Type: Application
    Filed: December 9, 2011
    Publication date: May 24, 2012
    Applicant: CURRENT MOTOR COMPANY, INC.
    Inventor: Erik Kauppi