Including An Axial Air Gap Patents (Class 310/156.32)
  • Patent number: 10702694
    Abstract: Apparatus and methods are described herein that provide a vibratory device that can apply a vibratory signal to a portion of a head of a user such that the vibratory signal can be conducted via bone to a vestibular system of the user and cause a portion of the vestibular system to move in a manner equivalent to that of a therapeutically effective vibratory signal applied to an area overlaying a mastoid bone of the user. The vibratory device can be associated with frequencies less than 200 Hz. The vibratory device can be effective at treating a physiological condition associated with the vestibular system.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: July 7, 2020
    Assignee: Otolith Sound Inc.
    Inventors: Samuel Owen, Robert True
  • Patent number: 10574110
    Abstract: A lightweight and efficient electrical machine element including a method of manufacture providing a stator winding for an electric machine which has a large portion of its volume containing electrically conductive strands and a small portion of its volume containing of an encapsulant material. The stator winding includes winding of a first phase by shaping a portion of a bundle of conductive strands into an overlapping, multi-layer arrangement. Winding of successive phases occurs with further bundles of conductor strands around the preceding phases constructed into similar overlapping, multi-layer arrangements. The multiple phases are impregnated with the encapsulant material using dies to press the bundles into a desired form while expelling excess encapsulant prior to the curing of the encapsulant material. The encapsulated winding is removed from the dies after the encapsulant has cured. The encapsulant coating on the strands may be activated using either heat or solvent.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: February 25, 2020
    Assignee: LAUNCHPOINT TECHNOLOGIES, INC.
    Inventors: Geoffrey Alan Long, Bradley E. Paden, Michael Richard Ricci, David Brian Paden, Jonathan Gordon Sugar
  • Patent number: 10530218
    Abstract: A vibration motor includes a base portion arranged to extend perpendicularly to a central axis extending in a vertical direction; a shaft having a lower end fixed to the base portion, and arranged to project upward along the central axis; a circuit board arranged above the base portion; a single annular coil attached to the circuit board, and arranged to have the shaft arranged inside thereof; a bearing portion attached to the shaft to be rotatable with respect to the shaft above the coil; a rotor holder attached to the bearing portion; a magnet portion including a plurality of magnetic poles, and attached to the rotor holder; an eccentric weight attached to the rotor holder; a spacer attached to the shaft between the bearing portion and the coil, and including an upper surface arranged to be in contact with a lower surface of the bearing portion; and a cover portion arranged to cover, at least in part, upper and lateral sides of the rotor holder and the eccentric weight, and fixed to an upper end of the shaf
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 7, 2020
    Assignee: NIDEC SEIMITSU CORPORATION
    Inventor: Daisuke Takagi
  • Patent number: 10523085
    Abstract: A vibration motor includes a base portion arranged to extend perpendicularly to a central axis extending in a vertical direction; a shaft; a coil portion; a bearing portion; a rotor holder; a magnet portion; and an eccentric weight. The base portion includes a base magnetic portion made of a magnetic metal; and a base nonmagnetic portion made of a nonmagnetic metal, fixed to an edge portion of the base magnetic portion, and arranged to extend from the edge portion of the base magnetic portion perpendicularly to the vertical direction. The base magnetic portion includes a plurality of magnetic element portions arranged in a circumferential direction, and arranged at positions opposed to the magnet portion in the vertical direction. The base nonmagnetic portion includes a plurality of nonmagnetic element portions arranged to alternate with the magnetic element portions in the circumferential direction, and arranged at positions opposed to the magnet portion in the vertical direction.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: December 31, 2019
    Assignee: NIDEC SEIMITSU CORPORATION
    Inventor: Naoki Kanai
  • Patent number: 10260873
    Abstract: Some embodiments of the invention include a surveying apparatus that includes an optoelectronic distance measuring device having a measuring beam path, a base for placing the surveying apparatus, a support which is mounted on the base such that it is rotatable about a vertical axis, a beam directing unit which is mounted in the support such that it is rotatable about a tilting axis, an angle measurement system for measuring the axial positions, and an actuatable positioning device driving the beam directing unit or the support. In some embodiments the positioning device may include a plurality of coils which are arranged in a positionally fixed manner in the form of a ring about the tilting axis and/or vertical axis, with winding axes which are axially parallel to the tilting axis or vertical axis.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: April 16, 2019
    Assignee: LEICA GEOSYSTEMS AG
    Inventors: Oliver Faix, Christoph Herbst, Daniel Auer, Josef Müller
  • Patent number: 10243428
    Abstract: The present disclosure illustrates a fan structure which includes an outer shell member, a rotating module and a circuit module. The outer shell member has a receiving groove, and an axis part and a fastening part. The fastening part includes winding columns. The rotating module includes the fan, an axis coupling part pivotally connected with the axis part, and a magnetic part disposed on a periphery of the axis coupling part. The circuit module includes a circuit board which has positioning holes formed on and annularly arranged the surface thereof. Position-limiting caps are respectively mounted and fixed on the winding column after the winding columns are inserted through the positioning holes. A conductive wire is wound on the winding columns to form coils, and has two ends welded on the circuit board. Therefore, defect rate and assembly cost of production of fan structure of the present disclosure can be decreased.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: March 26, 2019
    Assignee: Global Win Technology Co., Ltd.
    Inventor: Shih-Jen Lin
  • Patent number: 10224786
    Abstract: The present invention provides an axial flux motor (10) having: a rotor (20) having a radially extending portion (20r) and an axially extending portion (20c) having a first side (20a) and a second side (20b); a stator (22) having an inner aperture (30), a front wall (34) having a first side (34s) and a second side (34i) and being axially spaced from the first side (20a) of the rotor (20) by a gap (38), a bearing member (32) within the inner aperture (30) of the stator (22) and supporting the axially extending portion (20c) of the rotor (20); a casing (40) having an axially and circumferentially extending outer portion (48) surrounding said rotor (20) and having an inner surface (43); a cover plate (42) having an inner face (42i) confronting and being spaced from said second side (20b) of said rotor (20); a containment chamber (26) including said second side (34i), and said inner face (42i) of said cover plate (42) and having a top portion (45); a sump (50) within the containment chamber (26); and one or more
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: March 5, 2019
    Assignee: YASA LIMITED
    Inventors: Tim Woolmer, Chris McCaw
  • Patent number: 10048104
    Abstract: Sensor and/or power-harvesting apparatus are provided for sensing and/or harvesting energy across a relatively wide dynamic range of a driving rotational input. The apparatus may include a rotor magnet (10, 62) responsive to a driving rotational input (14, 64). Utilization of a togging effect or a magnetic spring effect results in certain rapid-rotation events where the rotor magnet can rapidly rotate regardless of a low rate of rotation of the driving rotational input. A coil assembly (28, 75) is magnetically coupled to the rotor magnet to generate a signal in response to rotation of the rotor magnet during the rapid-rotation events. This signal may be used to harvest electrical energy and/or may be processed to determine characteristics of the driving rotational input.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: August 14, 2018
    Assignee: Dynapar Corporation
    Inventors: Edward G. Colby, Andrew N. Dames, Edward J. Taylor, Cathleen M. Clausen
  • Patent number: 9882517
    Abstract: A method and a system for controlling a motor are provided to allow for a limp home function when an error occurs in a Hall effect sensor that detects the position of a rotor while operating a motor used for an automotive electric water pump. The method includes determining an output error of a Hall effect sensor and stopping adjustment a speed of the motor based on output of the Hall effect sensor, in response to detecting an output error of the Hall effect sensor. Additionally, the method includes adjusting the speed of the motor based on a counter electromotive force generated by a plurality of stator coils having different phases in the motor.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: January 30, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Soo Shim, Jae Shin Yi, Byoung Hoon Choi, Yeon Ho Kim
  • Patent number: 9800104
    Abstract: An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of a motor is configured by a nonmagnetic steel having a relative permeability of less than 1.005 and a 0.2% yield strength at room temperature of 550 MPa or more.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 24, 2017
    Assignees: THE JAPAN STEEL WORKS, LTD., SANWAKOGYO Ltd.
    Inventors: Shinji Tanaka, Hirokazu Madarame, Toshifumi Nakajima, Kazuhiro Miyagi
  • Patent number: 9667108
    Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: May 30, 2017
    Assignee: NIDEC CORPORATION
    Inventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
  • Patent number: 9667117
    Abstract: A stabilization system for a rotating load, such as a flywheel, includes a mechanical bearing to continuously support a shaft of the rotating load so as to hold the shaft at a substantially fixed axis of rotation. A magnetic stabilization assembly includes a plurality of electromagnets arranged around the shaft. Control circuitry for controls a resultant magnetic field generated by the electromagnets such that the magnetic field acts on a ferromagnetic element of the shaft to reduce imbalance forces acting on the shaft.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: May 30, 2017
    Assignee: CHAKRATEC LTD.
    Inventors: Ilan Ben David, Nir Zohar, David Pincu
  • Patent number: 9559576
    Abstract: A motor vehicle having an electric motor driving a permanent magnet power transmission connected to the gear box of the vehicle. The magnet power transmission has first and second disk assemblies. A copper member on the first disk assembly faces a plurality of permanent magnets located in bores in the second disk assembly. A control assembly operatively connected to the second disk assembly selectively moves the second disk assembly and magnets toward and away from the first disk assembly to vary the flux between the first disk assembly and second disk assembly.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: January 31, 2017
    Assignee: MAG-TRANS CORPORATION
    Inventor: Robert V. Albertson
  • Patent number: 9548153
    Abstract: Apparatus and methods to magnetize and demagnetize the magnetic poles of a rotor assembly for an electrical machine, such as a generator. The apparatus and methods provide for individually magnetize magnetic domains in the permanent magnetic material of the magnetic poles of a rotor assembly of the electrical machine after the electrical machine is installed in a larger assembly. The magnetization system may be used to magnetize and demagnetize the magnetic poles while the rotor assembly is connected with a prime mover, such a rotor of a wind turbine.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: January 17, 2017
    Assignee: Vestas Wind Systems A/S
    Inventor: Peter Mongeau
  • Patent number: 9209656
    Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: December 8, 2015
    Assignee: NIDEC CORPORATION
    Inventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
  • Patent number: 9024497
    Abstract: A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes a circuit board disposed between the base and the magnet unit, induction coils disposed on the circuit board and operatively associated with the magnet unit, a sensor unit disposed on the circuit board and spaced apart from the induction coils, and a rotor positioning component disposed on the second surface of the base and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: May 5, 2015
    Assignee: Yen Sun Technology Corp.
    Inventors: Chien-Jung Chen, Hsien-Wen Liu, Chih-Tsung Hsu, Tzu-Wen Tsai
  • Patent number: 9024506
    Abstract: A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes induction coils disposed on a circuit board, a sensor unit that is disposed on the circuit board and spaced apart from the induction coils and that defines a first reference line with the rotation axis, and a rotor positioning component disposed on the second surface of the base, extending along a second reference line, and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: May 5, 2015
    Assignee: Yen Sun Technology Corp.
    Inventors: Chien-Jung Chen, Hsien-Wen Liu, Chih-Tsung Hsu, Tzu-Wen Tsai
  • Publication number: 20150116866
    Abstract: A rotary actuator for positioning a recording head in a data storage mechanism and that includes first and second cylindrical subassemblies separated by an air gap. One of the subassemblies includes a magnetically conductive core with an electrically conductive coil wrapped thereover to enable first and second current flow directions in the circuit. The other of the subassemblies includes a magnetically conductive core and at least one magnet secured thereto. Transmission of an electric current through the electrically conductive coil induces rotation of one of the subassemblies relative to the other of the subassemblies to rotate the recording head about an axis that is perpendicular to recording media on the recording head. The disclosed rotary actuator facilitates quick and accurate recording head position changes due to low inertia of the rotating subassembly as well as reduced inductance and symmetrical mass distribution of the actuator.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: Oracle International Corporation
    Inventors: Darryl Wayne Yeakley, Frank A. Goodknight, Steven G. Suttle
  • Patent number: 8994319
    Abstract: An electric motor includes a magnet rotor which is placed with an air gap interposed between it and a stator and has a magnetic pole portion formed from a plastic magnet which swells by hydrogen bonds, an inverter circuit, a DC-voltage conversion portion, a driving logic control portion, a supply current value control portion, a current value designation portion, a reference current value designation portion, and a correlation designation portion, wherein the correlation designation portion determines an average current value by changing the average current value linearly or non-linearly with respect to a reference current value, and the magnetic pole portion absorbs moisture to swell, thereby making the air gap smaller, at higher humidity than a reference humidity.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: March 31, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Masayuki Takada
  • Patent number: 8946961
    Abstract: A motor with power-generating coil set including a base, a rotor, a driving circuit and a power-storing unit is disclosed. The base has a shaft coupling portion and a supporting surface, wherein the supporting surface surrounds the shaft coupling portion, and a driving coil set and a power-generating coil set are disposed above the supporting surface. The rotor has a carrier, a shaft and a magnetic member, wherein the carrier has a coupling surface, the shaft rotatably couples with the shaft coupling portion of the base, and the magnetic member is mounted on the coupling surface and has a magnetic face facing the driving coil set and the power-generating coil set. The driving circuit electrically connects with and sends a driving signal to the driving coil set. The power-storing unit electrically connects with and stores electric power generated by the power-generating coil set.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: February 3, 2015
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 8941279
    Abstract: There is provided an axial gap type generator. The axial gap type generator includes: a stator core fixed to a crank case of an engine; a rotor yoke fixed to a crankshaft of the engine and opposing the stator core across spacing in an axial direction of the crankshaft; a first planar section provided in the crankshaft and formed to have a planar shape that is perpendicular to a rotation center axis; a second planar section provided at a base, at which the rotor yoke is mounted on the crankshaft, and disposed opposing the first planar section; and a shim clamped between the first planar section and the second planar section.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kazuya Numaguchi, Hiroyuki Hisada
  • Patent number: 8937422
    Abstract: The magnetic iron core includes an amorphous foil strip wound to form the magnetic iron core. Preferably, the magnetic iron core is filled with resin, the resin being disposed by using a spacer between pluralities of windings of the amorphous foil strip. Preferably, the magnetic iron core is covered with resin integrated with and continuous to the resin disposed between pluralities of windings of the amorphous foil strip.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: January 20, 2015
    Assignees: Hitachi Industrial Equipment Systems Co., Ltd., Hitachi Appliances, Inc.
    Inventors: Yuji Enomoto, Zhuonan Wang, Ryoso Masaki, Hiromitsu Itabashi
  • Publication number: 20150015174
    Abstract: A fault tolerant virtual elliptical electric motor has at least four coil elements constrained in a stator case. A drive plate is supported by a fulcrum for nutating motion and has at least four core segments each associated with a respective one of the at least four coil elements for attraction upon activation. A control processor provides independent current control to each of the at least four coil elements for activation responsive to a received position command and a received wobble angle input, inducing the at least four coil elements to operate in a pure torque sum configuration upon the drive plate.
    Type: Application
    Filed: July 12, 2013
    Publication date: January 15, 2015
    Inventor: Robert Atmur
  • Patent number: 8860282
    Abstract: The invention concerns a polyphase motor comprising M phases, M being equal to 2 or 3, the motor consisting of a stator part (1) excited by electric coils and by a magnetized rotor (2). The invention is characterized in that the rotor (2) has a disc-shaped magnetized part with R pairs of alternately poles magnetized in alternating directions in the thickness, R being equal to n*(M+1) or 5*n, and said stator part (1) has S poles, some of which excited at least by an electric coil, S being equal to 8*n, for even M, and 9*n for odd M, n being an integer not less than 1.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: October 14, 2014
    Assignee: Moving Magnet Technologies
    Inventors: Pierre Gandel, Daniel Prudham
  • Patent number: 8847451
    Abstract: A first bias magnetic flux may be communicated between a first axial pole and a first axial facing surface of the body. A second bias magnetic flux may be communicated between a second axial pole and a second axial facing surface of the body. A time-varying axial control magnetic flux may be communicated through the first and second axial facing surfaces of the body, and may be generated in a magnetic circuit including the body, the first and second axial poles, and an axial magnetic backiron. The first and second axial poles may include axial pole laminated inserts composed of electrically isolated steel laminations stacked along the body axis. The axial magnetic backiron may include laminated inserts composed of electrically isolated steel laminations stacked in the direction tangential to the body axis. The axial pole laminated inserts may be magnetically coupled to the axial magnetic backiron laminated inserts.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: September 30, 2014
    Assignee: Calnetix Technologies, L.L.C.
    Inventors: Alexei V. Filatov, Lawrence A. Hawkins
  • Publication number: 20140265700
    Abstract: An electric machine comprising a permanent magnet rotor assembly is provided. The electric machine comprises a permanent magnet rotor assembly comprising a plurality of permanent magnets coupled to a rotor disk and a plurality of magnet shims coupled to the plurality of permanent magnets opposite the rotor disk. Each magnet shim of the plurality of magnet shims has a substantially complementary shape as a respective permanent magnet of the plurality of permanent magnets. The electric machine further comprises a stator core comprising a plurality of stator teeth that define a plurality of slots therebetween. At least one of the plurality of magnet shims is configured to direct magnetic flux from at least one of the plurality of permanent magnets to at least one stator tooth of the plurality of stator teeth.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Regal Beloit Australia PTY LTD
    Inventors: Dean James Patterson, Rafal Pawel Rohoza, Steven Peter Camilleri, Matthew Turner, Charles Richard Langford
  • Publication number: 20140265678
    Abstract: An energy converting device having an eccentric rotor includes a fixed portion and an eccentric rotor. This fixed portion has a central axis, an outer frame, and several fixed coil portions. The eccentric rotor has a bearing, a rotatory shaft, an eccentric arm, an eccentric shaft portion, a supporting plate, an inner annular magnetic portion, and an outer annular magnetic portion. The inner magnetic portion and the outer magnetic portion are concentric and aligned with the eccentric shaft portion. The eccentric shaft portion is offset from the rotary shaft. When the rotary shaft of the eccentric rotor rotates, these fixed coil portions cut through the inner magnetic portion and the outer magnetic portion repeatedly, so magnetic flux passing through the coils alternates accordingly to generate electromotive force. Conversely, it can be used as an electric motor. In addition, it can be integrated with a cycloidal speed reducer to form a motor with speed reduction and torque augmentation capability.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: NATIONAL YUNLIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventor: SHANG-TEH WU
  • Patent number: 8836192
    Abstract: In the axial gap rotating electrical machine, the rotor includes a rotor yoke that is formed by wrapping amorphous ribbon wound toroidal core, which is obtained by winding an amorphous magnetic metal ribbon into a toroidal core. Magnets having plural poles are circumferentially disposed on a stator-facing surface of the amorphous ribbon wound toroidal core.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: September 16, 2014
    Assignees: Hitachi Industrial Equipment Systems Co., Ltd., Hitachi Metals, Ltd., Hitachi Appliances, Inc.
    Inventors: Zhuonan Wang, Yuji Enomoto, Ryoso Masaki, Hiromitsu Itabashi, Tomio Yoshikawa
  • Patent number: 8823235
    Abstract: An axial gap-type permanent magnetic rotating machine comprises a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the rotor yoke such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of circumferentially arranged coils and disposed to define an axial gap with the rotor. In the rotor, each permanent magnet segment is an assembly of two or more divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: September 2, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Naoki Watanabe, Yuhito Doi, Takehisa Minowa, Hajime Nakamura, Koichi Hirota
  • Publication number: 20140210295
    Abstract: A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes a circuit board disposed between the base and the magnet unit, induction coils disposed on the circuit board and operatively associated with the magnet unit, a sensor unit disposed on the circuit board and spaced apart from the induction coils, and a rotor positioning component disposed on the second surface of the base and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating.
    Type: Application
    Filed: January 25, 2013
    Publication date: July 31, 2014
    Applicant: Yen Sun Technology Corp.
    Inventors: Chien-Jung Chen, Hsien-Wen Liu, Chih-Tsung HSU, Tzu-Wen Tsai
  • Patent number: 8791616
    Abstract: The invention relates to an axial flux electric machine having permanent magnets and comprising a rotor surrounding a stator. It is characterized in that the stator comprises: a “support” first portion; a set of active modules constituting the secondary portion of the magnetic circuit; and fastener means for fastening the modules to the support portion.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: July 29, 2014
    Assignee: DDIS, S.A.S.
    Inventors: Jean Marc Canini, Bernard Claude Lhenry
  • Patent number: 8786155
    Abstract: When an axial gap rotating electrical machine is assembled, stator cores are accurately positioned and a manufacturing process therefor is simplified. The axial gap rotating electrical machine comprises: a housing frame body having a first space in the cylindrical central part thereof and multiple second spaces located in the circumferential direction which have the same distances from the center; a shaft rotatably provided in the first space in the housing frame body; a core placed in each of the second spaces in the housing frame body and a coil arranged around the core; a rotor yoke fixed on the shaft, extended in the direction of the circumference thereof, and having multiple magnets arranged in circumferential positions confronting the cores; and a case having a hole for the shaft and housing the housing frame body and the rotor yoke.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: July 22, 2014
    Assignees: Hitachi Appliances, Inc., Hitachi Metals, Ltd., Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhuonan Wang, Yuji Enomoto, Motoya Ito, Ryoso Masaki, Hiromitsu Itabashi, Baiying Huang
  • Publication number: 20140175931
    Abstract: An axial flux permanent magnet motor includes a shaft, a rotor extending from the shaft in a radial direction, the rotor being rotatably mounted on the shaft, a magnet part disposed on the rotor to face downwardly in an axial direction, the magnet part having N poles and S poles, alternately disposed in a circumferential direction, a support member extending from the shaft in a radial direction, the support member being disposed below the rotor in the axial direction, and an electromagnet part disposed on the support member to face the magnet part in the axial direction. An axial distance between facing surfaces of the magnet part and the electromagnet part repeatedly changes in the circumferential direction.
    Type: Application
    Filed: February 28, 2013
    Publication date: June 26, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Jong LEE, Han Kyung BAE, Hee Soo YOON, Sung Jun LEEM
  • Patent number: 8760250
    Abstract: A magnetic system and related method for generating energy is described. Multiple embodiments are described having different shapes, alternative designs to receive different driving forces, varied magnetic structures, and so forth. In an example implementation, a magnetic structure may include on a single side multiple magnetic sources having different magnetic polarities. Other description herein may be directed to magnetizer printing, adaptable/adjustable correlated magnet devices, entertainment devices having correlated magnet technology, and so forth. Furthermore, description of additional magnet-related technology and example implementations thereof is included herein.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: June 24, 2014
    Assignee: Correlated Magnetics Rsearch, LLC.
    Inventors: Larry W. Fullerton, Mark D. Roberts, James L. Richards
  • Patent number: 8729761
    Abstract: A motor with an axial air gap includes a base, a rotor and a coil unit. The base has a shaft-coupling portion. The rotor has a body coupled with a permanent magnet and a shaft. The permanent magnet has inner and outer circumferential faces, and the inner and outer circumferential faces are respectively projected onto the base as inner and outer circles. The shaft is coupled with the shaft-coupling portion. The coil unit is mounted on the base and has one or more coils. The permanent magnet and the coil unit face each other. At least one coil has a periphery intersecting with the inner and outer circles. The permanent magnet has a first radial length between the inner and outer circumferential faces. At least one coil has a second radial length. The first radial length is 10% to 90% of the second radial length.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: May 20, 2014
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Duo-Nian Shan, Yuan-Jie Zheng
  • Publication number: 20140086766
    Abstract: In an electrically driven motor and an electrically driven pump using the electrically driven motor which can reduce a cogging torque in a simple structure not using a magnetized skew, the electrically driven motor includes a motor rotor in which a plurality of permanent magnets are attached onto an outer circumferential portion of rotor core and a stator having a plurality of slots and a plurality of projections are disposed on positions including a magnetic pole center of at least one of the permanent magnets at predetermined intervals of distance in a peripheral direction of an outer circumferential portion of the rotor core.
    Type: Application
    Filed: August 20, 2013
    Publication date: March 27, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventor: Takayuki CHIKAOKA
  • Publication number: 20140076668
    Abstract: An electric motor, a hoisting machine and also an elevator system are disclosed. The electric motor includes a stator, which stator includes slots, into which slots a concentrated winding is fitted. The electric motor also includes a rotating rotor, which rotor includes permanent magnets placed consecutively in a ring in the direction of the rotational movement. The ratio (LM/LP) of the width of a permanent Lp magnet at the point (LM) of the center line of the magnet and the width (Lp)? of a magnetic pole of the rotor is at least ? and at most ?.
    Type: Application
    Filed: November 25, 2013
    Publication date: March 20, 2014
    Applicant: KONE CORPORATION
    Inventors: Jussi HUPPUNEN, Asmo TENHUNEN
  • Publication number: 20140077666
    Abstract: An axial gap type electric rotating machine is disclosed. The rotating machine includes a rotor arranged to rotate about an axis of rotation, and a stator arranged so as to face the rotor with a predetermined gap in an axial direction of the axis of rotation. The rotor includes a back yoke and an annular rare earth bonded magnet made of a circumferentially continuous member fixed to the back yoke. The magnet is magnetized so that an N-pole and an S-pole of magnetic poles are arranged alternately in a circumferential direction, and includes cutout portions formed between adjacent magnetic poles. The stator includes a plurality of tooth portions arranged along a circumferential direction so as to face the magnet and a winding wound on the tooth portions.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 20, 2014
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takahiro NISHIKAWA, Haruyoshi HINO
  • Publication number: 20140062246
    Abstract: A device for positioning a planar array of magnets within a permanent magnet electrical machine of the type having a rotor and stator with an air gap there between. The device includes a body made of non-ferrous material and having a first side which is attachable to the rotor and a second side which, in an assembled machine, faces the air gap. The first side of the body has a plurality of recesses therein for receiving a corresponding plurality of magnets. The recesses are shaped and arranged to separate the magnets from each other and maintain a consistent spacing between them. When the device is attached to the rotor the magnets are held in a fixed position against the rotor. The electrical machine may be a motor or a generator.
    Type: Application
    Filed: November 1, 2013
    Publication date: March 6, 2014
    Applicant: IN MOTION TECHNOLOGIES PTY., LTD.
    Inventors: Charles Richard Langford, Steven Peter Camilleri, Dean James Patterson
  • Publication number: 20140042859
    Abstract: An axial-gap rotating electrical machine in which the distance of the air gap between a rotor and a stator can be accurately controlled is provided. A large diameter portion and a small diameter portion are formed on a rotating shaft and a stepped portion is formed therebetween. A rotor yoke is secured thereon and the position of the rotor is determined. The position of a bearing secured in a housing for rotatably supporting the rotating shaft is determined by a boss portion of the rotor yoke. The position of the housing is determined by the position of the bearing and the securing position of the stator is determined by a stepped portion formed on the inner circumference of the housing. Thus the position of the housing relative to the rotating shaft can be determined from the position of the rotor and the securing position of the stator can be determined.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhuonan WANG, Yuji ENOMOTO, Kenichi SOMA
  • Patent number: 8648512
    Abstract: An improved generator for using waterpower, wave-power or wind-power, comprising; a set of magnet plates and coil plates for mounting on a rotating shaft in parallel, the magnets installed on the magnet plates and the generating coils installed on the coil plates with constant-intervals in radial direction, a plurality of blades obliquely installed on circumference of the magnet plates and coil plates with mutually opposite direction, an inner annular cylinder and outer annular cylinder mounted on the coil plates to form annular container for inserting the magnets. A plurality of induction coils installed on the inner annular cylinder, a plurality of electromotive coils installed on the outer annular cylinder for proximately contact with ends of the magnets. The magnet plates and coil plates rotate in mutually opposite direction to enhance the quality of generation and repulsive force.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: February 11, 2014
    Inventor: Suk Ho Jang
  • Patent number: 8624458
    Abstract: An electrical, rotary machine may include a first stator core section being substantially circular and including a plurality of teeth, a second stator core section being substantially circular and including a plurality of teeth, a coil arranged between the first and second circular stator core sections, and a rotor including a plurality of permanent magnets. The first stator core section, the second stator core section, the coil and the rotor are encircling a common geometric axis, and the plurality of teeth of the first stator core section and the second stator core section are arranged to protrude towards the rotor. Additionally the teeth of the second stator core section are circumferentially displaced in relation to the teeth of the first stator core section, and the permanent magnets in the rotor are separated in the circumferential direction from each other by axially extending pole sections made from soft magnetic material.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: January 7, 2014
    Assignee: Hoganas AB (Publ)
    Inventors: Alan Jack, Edwin Pinguey, Goran Nord
  • Publication number: 20130313935
    Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.
    Type: Application
    Filed: April 22, 2013
    Publication date: November 28, 2013
    Applicant: NIDEC CORPORATION
    Inventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
  • Publication number: 20130285483
    Abstract: Disclosed herein is an axial flux permanent magnet (AFPM) motor including: a stator including a stator core, a magnet wire wound around the stator core, a shaft, and a stator core supporting member fixedly supporting the stator core to the shaft; and a rotor including a rotor case having a space part formed therein so as to receive the stator core therein, a magnet fixedly coupled to an inner side portion of the rotor case so as to face the stator core, and a bearing rotatably supporting the rotor case to the shaft.
    Type: Application
    Filed: July 5, 2012
    Publication date: October 31, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Jong LEE, Han Kyung BAE, Hee Soo YOON, Su Bong JANG
  • Patent number: 8556601
    Abstract: A heat-dissipating fan assembly is provided. The heat-dissipating fan includes a base, a axial tube, at least one coil mounted on the base, and an impeller module having an impeller, a plurality of vanes disposed on the circumferential surface of the impeller, a shaft, and a permanent magnet. The axial tube is mounted on the base, and made of a permeability material. The shaft and the permanent magnet are disposed on the same surface of the impeller. The shaft is inserted in conjunction with the axial tube. The at least one coil is used to electrically connect with a power to interact with the permanent magnet, which in turns rotates the impeller module.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: October 15, 2013
    Assignee: PC-Fan Technology Inc.
    Inventor: Clement Chang
  • Publication number: 20130201812
    Abstract: A spindle motor includes a flat stator, a rotor magnet arranged above the stator, and a magnetic portion made of a ferromagnetic material. The magnetic portion is positioned lower than the stator and the magnetic portion are axially overlapped with coils. A magnetic attraction force is generated between the magnetic portion and the rotor magnet. Since the magnetic portion is positioned lower than the stator, it is possible to cause magnetic fluxes to efficiently flow between the rotor magnet and the stator. Further, the stator includes a protrusion protruded radially outward beyond an outer circumferential portion of a rotor hub. Accordingly, in a plan view, the stator is positioned radially outward of the rotor hub.
    Type: Application
    Filed: January 31, 2013
    Publication date: August 8, 2013
    Applicant: NIDEC CORPORATION
    Inventor: NIDEC CORPORATION
  • Publication number: 20130154449
    Abstract: A disk-shaped multi combined three-dimensional permanent magnet motor is provided. Two independent disk-shaped stators are respectively provided on a left side and a right side in a shell. A disk-shaped rotor with permanent magnets adhered on both a left face and a right face thereof is provided between the two independent disk-shaped stators. Spindle hole in the center of the rotor is coupled with a spindle of the main dynamical axis. Nine motor winding coils provided in side face slots of the disk-shaped stators are a unit for one motor. The left and right stators serve as one group to determine pole-pairs number of the motor which further determines numbers of the permanent magnets adhered. The motor is capable of driving load at low speed and meeting the function requirements of low-speed and high torque, which greatly improve efficiency of the whole machine.
    Type: Application
    Filed: November 29, 2012
    Publication date: June 20, 2013
    Inventor: Kunyuan Shen
  • Publication number: 20130147302
    Abstract: A rotor core for an Internal Permanent Magnet (IPM) machine includes a cavity having a magnet disposed therein. The cavity defines an air slot adjacent a radially outermost edge of the magnet disposed therein. A leakage flux path extends across the air slot and connects opposing sides of the cavity. The leakage flux path is oriented in an approximate tangential relationship relative to an axis of rotation of the rotor core, and is angled relative to the radially outermost edge of the magnet disposed within the cavity to direct flux away from the magnet. The cavity further includes an air pocket disposed along a radial inner surface of the magnet relative to the axis of rotation, adjacent the air slot of the cavity.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 13, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Khwaja M. Rahman, Sinisa Jurkovic
  • Patent number: 8453313
    Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation with the assembled state being maintained.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: June 4, 2013
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yuhito Doi, Hideki Kobayashi, Takehisa Minowa, Minori Miyata, Atsushi Miyata
  • Publication number: 20130134818
    Abstract: A three-phase axial flux motor is disclosed. The axial flux motor includes a stator, a rotor and a driving unit. The stator includes three coils. The rotor is pivotally disposed on the stator and includes a magnet which has a magnetizing state. The driving unit outputs a sinusoidal phase voltage to the coils. The magnetizing state of the magnet is corresponding to the inductance waveform and the IEF (induced electromotive force) waveform of the stator to let the waveform of the driving phase current to be an approximative sine wave.
    Type: Application
    Filed: November 20, 2012
    Publication date: May 30, 2013
    Applicant: DELTA ELECTRONICS, INC.
    Inventor: DELTA ELECTRONICS, INC.