Miscellaneous Rotor Structure Patents (Class 310/261.1)
  • Patent number: 11502564
    Abstract: A motor comprising a shaft, an array of stator assemblies rigidly attached to the shaft, each stator assembly includes a stator yoke having a toroid shape fixed around the shaft and having a number of slots at radial and axis directional faces with windings within the slots of the stator yoke, and a rotor assembly rotatively attached to the shaft to enclose the array of stator assemblies, the rotor assembly has a rotor drum with sections, each section embraces one stator assembly, each section has two axial-flux permanent magnet arrays attached on axial-directional inner surfaces of the section and has one radial-flux permanent magnet array attached on a radial-directional inner surface of the section furthest from the shaft, wherein the axial-flux and the radial-flux permanent magnet arrays with the number of pole pairs equals the number of the stator slots plus or minus the number of stator winding pole pair.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: November 15, 2022
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Lei Zhou, Bingnan Wang, Chungwei Lin, Dehong Liu, Yebin Wang, Koon Hoo Teo
  • Patent number: 11462981
    Abstract: An electric motor includes a cylindrical rotor with a plurality of wires parallel to the cylindrical axis nested between two cylinders of magnets in a stator. The cylinders of magnets may be a solid magnet, a plurality of bar magnets, a plurality of coils generating magnetic fields or other magnets or generated magnetic fields. A nested electric motor includes a first electric motor additionally including a first shaft, which first electric motor nests within the hollow center of a second larger electric motor additionally including a second shaft. The first shaft is coaxial with the second shaft.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: October 4, 2022
    Inventor: Hossam Abdou
  • Patent number: 11434911
    Abstract: A pump device is provided. In the pump device, in a first wall portion of an insulator configured to surround an inner partition wall portion arranged on an inner peripheral side of a stator core and to prevent a winding of a driving coil from collapsing, there is provided a first notch cut out from an end surface on a Z2 direction side of the first wall portion toward a Z1 direction side. And, in a second wall portion of an insulator configured to surround an inner partition wall portion and to prevent a winding of a driving coil from collapsing, there is provided a second notch cut out from an end surface on a Z1 direction side of the second wall portion toward a Z2 direction side.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: September 6, 2022
    Inventors: Noboru Otsuki, Hiroki Kuratani
  • Patent number: 11342808
    Abstract: A motor includes a housing, a stator assembly disposed in the housing, the stator assembly defining a rotor cavity extending through the housing, a rotor assembly including a rotor shaft extending along a longitudinal axis, two brackets connected to the housing, the two brackets disposed, one each, at either end of the rotor cavity, and two bearings disposed, one each, on each of the two brackets, wherein the two bearings rotatably support the rotor shaft within the housing. The rotor shaft is a stepped shaft that includes end portions disposed at either end of a core portion, the core portion includes channels extending in a direction parallel to the longitudinal axis, the channels extending radially at a depth into the core portion to define a core diameter such that the core diameter is less than the first diameter.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: May 24, 2022
    Assignee: ABB Schweiz AG
    Inventors: Papa M. Diouf, Wayne Paschall, Bryan K. Oakes, Gregory G. Zemaitis
  • Patent number: 11322999
    Abstract: The present invention relates to an electric motor (1) comprising a rotor main body (2), to which a plurality of permanent magnets (3) or a rotor winding can be attached, and a shaft (4) for receiving the rotor main body (2), characterized in that an isolation body (5) is arranged between the shaft (4) and the rotor main body (2) to electrically isolate the rotor main body (2) from the shaft (4), in that the isolation body (5) engages at least partially into the shaft (4) and into the rotor main body (2) in order to connect the shaft (4) and rotor main body (2) for conjoint rotation, and in that the isolation body (5) is made from a composite of ceramic and plastic.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: May 3, 2022
    Assignee: Robert Bosch GbmH
    Inventors: David Philipp Morisco, Jens Burghaus
  • Patent number: 11005315
    Abstract: A method of manufacturing a stator assembly for an electrified rotary system includes attaching a first tooth and a second tooth to an inner support to define a first construction. The first tooth and the second tooth extend radially away from the inner support in the first construction. The method also includes attaching a winding about the first tooth of the first construction to define a second construction. Furthermore, the method includes applying, with a fixture, a preload at a joint between the inner support and the first tooth of the second construction. Moreover, the method includes attaching an outer support to a first outer radial end of the first tooth and to a second outer radial end of the second tooth while applying the preload to define a third construction.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: May 11, 2021
    Inventors: Sunming Shiao, Kour Thay Chau, Leroy Allen Fizer
  • Patent number: 10837454
    Abstract: A turbomachine having a rotor that extends along a rotational axis and a radial bearing in which the rotor is radially mounted on a radial bearing point. In the axial region of the radial bearing point, the rotor has a hollow chamber annularly located in the circumferential direction in the region of the outer 20% of the diameter of the radial bearing point and which is thermally insulating between a radially inner core region of the rotor in the region of the radial bearing point and the radial outer region of the rotor in the region of the radial bearing point. A first shaft end of the rotor protrudes from the axial center of the radial bearing point by a projection over the radial bearing point, wherein a first quotient QLO of the projection OVH divided by the total length TLE of the rotor QLO=OVH/TLE>0.15.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: November 17, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rainer Gausmann, Chunsheng Wei
  • Patent number: 10690336
    Abstract: An illumination fan connectable with at least one illumination fan for a computer includes a body, provided with a fan in center of the body, an illumination area on at least two sides of the fan at top of the body, a power socket and a first connector on one side of the body, and a second connector on another side of the body. The power socket is electrically connected with the first connector, the second connector, the fan and the illumination area. When the power socket is supplied with power, the fan and the illumination area of the body is respectively driven into rotation and illumination, and when the first connector of the body is connected with a second connector of a body of another illumination fan, a fan and an illumination area of the body of another illumination fan is respectively driven into rotation and illumination.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: June 23, 2020
    Inventor: Chien-Hao Chen
  • Patent number: 10598216
    Abstract: A pivoting assembly includes a base, a bearing, and a rotating shaft. The bearing is disposed on the base and includes a first ring wall. The rotating shaft is sheathed in the first ring wall and rotatably disposed on the first ring wall. In this way, a larger superficial area is provided to generate an effective oil pressure acting force.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: March 24, 2020
    Inventors: Hsin-Chen Lin, Ing-Jer Chiou
  • Patent number: 10541573
    Abstract: A segment for supporting electromagnetic coupling elements of a stator or rotor of an electrical machine comprises a plurality of elongate laminations which are stacked in a first direction to form a lamination stack with elongate edges of the laminations defining opposite first and second major faces of the lamination stack. The segment comprises a plurality of elongate compression devices passing internally through the lamination stack in the first direction and arranged to compress together the laminations in the lamination stack.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: January 21, 2020
    Assignee: Lappeenranta University of Technology
    Inventors: Robert Semken, Juha Pyrhönen, Yulia Alexandrova, Maria Polikarpova
  • Patent number: 10389221
    Abstract: The present invention relates to a power transmission apparatus using a magnetic field, the power transmission apparatus comprising a rotor module, a front driver module and a rear driver module, or comprising a rotor module and any one of a front driver module and a rear driver module. The power transmission apparatus generates, using power received from a power applying driving body or power received from a power receiving driving body, rotational power from a combination of an induced magnetic field which the front driver module generates, a rotating magnetic field which the rotor module generates, and a rotating magnetic field which the rotor module generates together with the front driver module and the rear driver module, and acceleratedly rotates to increase the rotational power, thereby transmitting power to the power receiving driving body and to a target object.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: August 20, 2019
    Inventors: Seungjoo Han, Byungho Han, Jongtaek Han
  • Patent number: 10371130
    Abstract: A magnetic piston shoe pair for an axial piston pump and the motor includes: pistons, coil suites, piston shoes and a swash plate, wherein the interior of the coil suite is a closed coil; the bearing surface that the end surface of the swash plate abuts the piston shoe is provided with micro-molding holes; the micro-molding holes are hemispherical; the back surface of the swash plate is provided with a primary iron core and two secondary iron cores; the iron cores are wound with coil; the coil is connected to an external alternating current power supply. When the pump/motor is working, the coil is energized to generate a magnetic field, thereby adsorbing the piston shoe on the swash plate. Meanwhile, the coil suite generates an inductive magnetic field.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: August 6, 2019
    Inventors: Haishun Deng, Yongkang Yang, Haifeng Wang, Qingchun Wang, Feiyu Mao, Chunyan Wang, Shiju He, Tao Wang
  • Patent number: 10305336
    Abstract: The present invention relates to an aircraft with at least one synchronous reluctance machine which comprises a stator with a plurality of grooves and teeth and a rotor with a plurality of magnetic flux barriers, wherein at least one magnetic flux barrier is designed asymmetrical to the q-axis.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: May 28, 2019
    Assignee: Liebherr-Aerospace Lindenberg GmbH
    Inventors: Tobias Lange, Rik W. De Doncker
  • Patent number: 10253649
    Abstract: A rotor shaft for a high speed motor that has a coating that is secured to a shaft body. The coating and the shaft body are formed from dissimilar materials. More specifically, the coating may be an alloy material, such as, for example, a copper alloy, while the shaft body may be a steel material. According to certain embodiments, the alloy material of the coating may be secured to at least a portion of a rotor body blank in a solution treated condition via a low temperature welding procedure. Additionally, the coating may be hardened, such as for example, through the use of an age hardening process. The coating and the rotor body blank may be machined together to form the rotor shaft. According to certain embodiments, such machining may configure the rotor shaft for use with a turbo-compressor that is configured for air compression.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: April 9, 2019
    Assignee: Ingersoll-Rand Company
    Inventors: James Lawrence Robb, Juha Tuomas Saari, George C. Hansen
  • Patent number: 9897091
    Abstract: In a compressor of the present invention, an intermediate pressure port through which a first discharge chamber and a motor chamber communicate with each other is formed in a front housing. A refrigerant having an intermediate pressure is discharged to the first discharge chamber. Consequently, it is possible to guide the refrigerant having the intermediate pressure in the first discharge chamber to the motor chamber, and cool an electric motor, which generates heat during actuation, with the refrigerant having the intermediate pressure. In the compressor, a first impeller and a second impeller are disposed such that large diameter portions of the first impeller and the second impeller face each other. The second impeller is smaller in diameter than the first impeller.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: February 20, 2018
    Inventors: Nobuaki Hoshino, Toshiro Fujii, Ryo Umeyama, Satoru Egawa, Hironao Yokoi, Takahito Kunieda
  • Patent number: 9806584
    Abstract: A rotor for an outer rotor-type motor is provided. The rotor includes a metallic coupler and a polymeric frame molded over at least part of the metallic coupler.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: October 31, 2017
    Assignee: Nidec Motor Corporation
    Inventors: Daniel E. Bailey, Daniel E. Hilton, Philip S. Johnson, Gregory M. Levine
  • Patent number: 9805079
    Abstract: Techniques are described herein for performing database operations against location and access transparent metadata units called fat pointers organized into globally distributed data structures. The fat pointers are created by extracting values corresponding to a particular key and paring each value with a reference to the local location and server that has the native format record containing the value. The fat pointers may be transferred to any server in the cluster, even if the server is different from the server that has the native format record. In general, most operations are performed against fat pointers rather than the native format records. This allows the cluster to perform work against arbitrary types of data efficiently and in a constant amount of time despite the variable sizes and structures of records.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: October 31, 2017
    Assignee: Xcalar, Inc.
    Inventors: Vikram Joshi, Jerene Yang, Brent Lim Tze Hao, Michael Brown
  • Patent number: 9798220
    Abstract: A shutter for an optical system, such as a small infrared camera, for alternately blocking and exposing an optical sensor to light includes an electrically conductive coil, having a center long axis, a magnet element rotatably mounted within the coil with an axis of rotation perpendicular to the center long axis of the coil, a shutter flag element connected to the magnet element, and a shutter base element supporting the shutter flag, magnet, and coil. Energizing the coil in a first manner causes the rotatable magnet to rotate from a first position to a second position and energizing the coil in a second manner returns the magnet to the first position, causing the flag to alternately block and expose the optical sensor.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: October 24, 2017
    Assignee: Seek Thermal, Inc.
    Inventors: Blake Henry, Scott Dayton, William J. Parrish, David C. Lindberg
  • Patent number: 9647520
    Abstract: A double stator switched reluctance rotating machine includes an annular rotor, an outer stator that is disposed outside the rotor, and an inner stator that is disposed inside the rotor, and has a structure in which the outer and inner stators are connected to each other in parallel.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: May 9, 2017
    Inventors: Narifumi Tojima, Takehiro Jikumaru, Norihisa Handa, Toshiyuki Hirao
  • Patent number: 9643500
    Abstract: A vehicular control device includes a rotation angle sensor sensing a rotation angle of a rotor of a motor, and a control device controlling the motor. When the control device controls the motor and detects that the vehicle has a collision, the control device determines a switching pattern, based on the rotation angle obtained from the rotation angle sensor, to switch a switching device of an inverter that drives the motor to zero a q axis current and also pass a d axis current, and once the switching pattern has been determined, then, whatever rotation angle may be sensed by the rotation angle sensor, the determined switching pattern is applied to discharge the electric charge of a smoothing capacitor connected to the inverter of the motor. This allows the smoothing capacitor's electric charge to be discharged if the rotation angle sensor has failed.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: May 9, 2017
    Inventor: Yukimasa Nishimura
  • Patent number: 9442003
    Abstract: An assembly that enables precise mounting of a sensor with improved heat transfer and rotation compensation includes an integrated dewar cooler assembly incorporating the sensor. The dewar assembly is mated to a motorized mount that is controlled to stabilize the rotation of the scene. The sensor is radially aligned relative to the axis of rotation in two adjustment stages. A first stage of adjustment controls the radial position of the sensor inside a bearing. And a second stage of adjustment controls radial translation of the entire assembly outside the bearing. Passive heat transfer is accomplished through a pair of heat sinks that effectively sandwich a hot expander end cap of the dewar, providing multiple heat paths. The entire dewar assembly is rotated during operation to stabilize the scene. The rotating mass of a cooling compressor coupled to the dewar is counter-balanced to avoid torque due to inertia.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: September 13, 2016
    Assignee: Raytheon Company
    Inventor: Evan Haynes
  • Patent number: 9399996
    Abstract: A cam plate for use with a pump includes at least one camming surface configured to enable an impeller to rotate in a first direction and substantially prevent the impeller from rotating in a second direction opposite the first direction. A ring recess is defined in the cam plate. The ring recess is configured to receive at least a portion of a cam ring that is configured to rotate within the ring recess. A follower recess is at least partially defined by the at least one camming surface and extends from the ring recess. The follower recess is configured to receive at least one cam follower therein.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: July 26, 2016
    Assignee: General Electric Company
    Inventor: Derek Lee Watkins
  • Patent number: 9391487
    Abstract: A rotor for an outer rotor-type motor is provided. The rotor includes a metallic coupler and a polymeric frame molded over at least part of the metallic coupler.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: July 12, 2016
    Assignee: Nidec Motor Corporation
    Inventors: Daniel E. Bailey, Daniel E. Hilton, Philip S. Johnson, Gregory M. Levine
  • Patent number: 9281231
    Abstract: A non-contact magnetic drive assembly with mechanical stop elements for a vacuum deposition system employing a lift-off process having a HULA configuration featuring a plurality of magnets coupled in an annular orientation to a central ring and an orbital ring, each magnet of the orbital ring becomes superposed with a magnet of the central ring as the orbital ring rotates, and a central drive component driving either the central ring, the orbital ring around the central ring or both simultaneously, the central drive component provides a rotational speed allowing non-contact, magnetic drive rotation of the orbital ring around the central ring until a difference between a magnetic drive torque of the superposed magnets and the rotational speed of the central drive component causes the superposed magnets to decouple enabling mechanical drive rotation by interactive contact between a plurality of central ring teeth and a plurality of orbital ring.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: March 8, 2016
    Assignee: Ferrotec (USA) Corporation
    Inventors: Cris Kroneberger, Bharatkumar Patel
  • Patent number: 9239082
    Abstract: A rotor comprising: a rotating shaft with at least one keyway formed at an outer circumferential surface thereof and ranging along an axial direction; and a rotor core that includes a key that projects out on an inner circumferential side thereof, and is fitted in the keyway; wherein: a recessed portion that widens outward along a radial direction is formed at each of two sides of the key facing opposite each other along a circumferential direction at the rotor core; a planar portion is formed at a bottom area of the recessed portion so as to lessen stress occurring on each of the two sides of the key facing opposite each other along the circumferential direction; the planar portion is a straight contoured portion extending over a predetermined length along a direction perpendicular to a direction in which the key projects out, and a connecting side surface extending to an inner circumference of the rotor core is formed continuously to an end of the straight contoured portion located on a side opposite from a
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: January 19, 2016
    Inventors: Tomoaki Kaimori, Kenichi Nakayama, Yasuyuki Saito, Dai Ikeda
  • Patent number: 9214837
    Abstract: An electric motor apparatus comprising: a rotor; and a stator formed of at least two stator components, each of the at least two stator components having a substantially hollow cylindrical form. The rotor is mounted within the at least two stator components on a rotational mounting such that the rotor can rotate about a longitudinal central axis with respect to the stator. Each of the at least two stator components comprising at least two protrusions arranged at different circumferential points on an inner surface of the at least two stator components, each of the at least two protrusions having a winding mounted thereon; and control circuitry configured to generate control signals to control power supplied to the windings on each of the at least two stator components, such that power can be controlled to each of the at least two stator components independently of each other.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: December 15, 2015
    Assignee: ARM Limited
    Inventor: David Pietromonaco
  • Patent number: 9172279
    Abstract: An automotive embedded permanent magnet rotary electric machine can suppress increases in torque ripples and cogging torque, reduce core loss near a stator, and increase magnetic torque and reluctance torque. In the automotive embedded permanent magnet rotary electric machine, a first permanent magnet and a second permanent magnet that constitute a magnetic pole are embedded so as to line up in a main direction of rotation of magnetic poles of a rotor core and are embedded so as to be radially outwardly convex in a region that extends from a leading end portion to a trailing end portion in the main direction of rotation of the magnetic poles, and the first permanent magnet is formed into an integrated body that extends from the leading end portion in the main direction of rotation of the magnetic poles beyond a pole center toward a trailing side.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: October 27, 2015
    Inventors: Kosuke Sekiya, Moriyuki Hazeyama, Takeshi Mori, Hideaki Arita, Haruyuki Kometani, Masaya Inoue
  • Patent number: 9035530
    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: Grant
    Filed: March 12, 2013
    Date of Patent: May 19, 2015
    Assignee: National Yunlin University of Science and Technology
    Inventor: Shang-Teh Wu
  • Patent number: 9021683
    Abstract: The present invention relates to a method for assembling a motor set that includes: coupling a rotor housing having a plurality of operating holes to a stator having shaft bushings with holes formed therein through the operating holes, thereby making the holes to be seen through the operating holes; coupling the holes of the stator associated with the rotor housing to stator assembly holes of a motor set assembly, the holes of the stator being aligned with the stator assembly holes of the motor set assembly; and inserting rivets into the holes through the operating holes and coupling the rivets to the stator assembly holes.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: May 5, 2015
    Assignee: New Motech Co., Ltd.
    Inventors: Jeong Cheol Jang, Ji Min Lee
  • Publication number: 20150076959
    Abstract: The invention relates to a method of producing a rotor (10) of an electric machine, the rotor (10) comprising a rotor body (14) adapted to be rotated about a rotor axis (A) as well as at least one rotor component (16) to be mounted to the rotor body (14), said method comprising the steps of: arranging the rotor component (16) on the rotor body (14) and winding a wire-like structure (20) around an outer circumference (12) of the rotor body having the rotor component (16) arranged thereon so as to form a bandage (18), with the wire-like structure (20) during winding thereof being held under an adjustable bias.
    Type: Application
    Filed: December 6, 2011
    Publication date: March 19, 2015
    Applicant: L-3 Communications Magnet-Motor GmbH
    Inventors: Peter Ehrhart, Jens Steffen, Anton Mueller
  • Patent number: 8957560
    Abstract: A rotor includes a rotor core and permanent magnets each of which is received in a corresponding slot of the rotor core with its magnetization direction being oblique to a radial direction of the rotor core. Each of the permanent magnets has a first corner portion positioned radially outermost and a second corner portion positioned radially innermost. For each of the permanent magnets, there are formed first and second gaps respectively between the first corner portion and the inner surface of the corresponding slot and between the second corner portion and the inner surface of the corresponding slot in a reference direction of the permanent magnet. The rotor core also has, for each of the permanent magnets, supporting portions each of which abuts and thereby supports, in the reference direction, a predetermined portion of the permanent magnet which is positioned away from both the first and second corner portions.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: February 17, 2015
    Assignee: Denso Corporation
    Inventors: Kazunori Uchiyama, Naoki Hakamada, Masahiro Seguchi
  • Publication number: 20140375167
    Abstract: Embodiments of the present invention provide methods for manufacturing an even-wall rotor or stator that do not suffer from drawbacks of the prior art. Even-wall rotors or stators produced according to those methods are also provided. In one embodiment, a method for manufacturing a rotor or stator for use in a mud motor is provided. The method includes providing a vacuum chamber; providing a metal electrode at least partially disposed in the vacuum chamber; providing a mold disposed in the vacuum chamber; and melting a portion of the electrode with a direct current arc, the molten metal flowing into the mold ring.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 25, 2014
    Inventors: David W. TEALE, Robert P. BADRAK
  • Publication number: 20140361659
    Abstract: Disclosed is a rotor housing for a motor. The rotor housing has a shaft bushing in the center thereof and includes a plurality of operating holes disposed at a defined position between an outer circumference of the rotor housing and the shaft bushing. The defined position corresponds to the position of a plurality of holes formed in a stator to be coupled to the rotor housing.
    Type: Application
    Filed: August 18, 2014
    Publication date: December 11, 2014
    Inventors: Jeong Cheol JANG, Ji Min LEE
  • Patent number: 8890389
    Abstract: An electric motor includes an inner stator including inner magnetic poles arranged circumferentially, an outer stator including outer magnets arranged circumferentially, and a rotor rotatably disposed between the inner and outer stators. The rotor includes a shaft, a rotor core fixed to the shaft and a winding wound on the rotor core. The rotor core includes a ring shaped yoke having a plurality of inner teeth extending inwardly and a plurality of outer teeth extending outwardly. The winding includes a plurality coils each including an inner side received in a corresponding inner slot formed between adjacent inner teeth and an outer side received in a corresponding outer slot formed between adjacent outer teeth.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: November 18, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Mao Xiong Jiang, Jian Zhao, Zhi Jun Wang, Ya Ming Zhang, Hai Hui Xiang
  • Patent number: 8840379
    Abstract: A ceiling fan includes an outer rotor motor having a rotor connected to a rotating disc and a stator connected with an inner tube. An outer tube is fitted around the inner tube, having one end connected with the rotating disc, and a plurality of elastic buffer pieces are positioned between the outer tube and the rotating disc. By so designing, when the rotor is rotated to actuate the rotating disc together with the outer tube to rotate, the elastic buffer pieces can absorb the vibration produced by operation of the outer rotor motor and also correct bias swinging of the outer tube through their elastic deformation to enable the outer tube to be rotated stably.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: September 23, 2014
    Assignee: Air Cool Industrial Co., Ltd.
    Inventor: Cliff Wang
  • Patent number: 8841815
    Abstract: A method for installing a rotor of an electrical machine is disclosed. The method comprises using axially directed guide bars (107-109) for keeping the rotor (102) centered with respect to a bore of a stator (101) during the installation of the rotor. The rotor has sliding surfaces so that it can be slid in the axial direction to its final position along the guide bars. The mechanical support structure (104) that supports bearings (105, 106) of the rotor are provided with supporting surfaces for being able to give mechanical support to the guide bars. The mechanical support structure (104) may comprise for example threaded holes to which threaded ends of the guide bars can be tightened. After the rotor has been moved to its final position and it is supported by the bearings, the guide bars are removed.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: September 23, 2014
    Assignees: The Switch Drive Systems Oy, Moventas Gears Oy
    Inventors: Tuomas Vuolle-Apiala, Jorma Tirkkonen, Ville Pakarinen, Jari Toikkanen, Olli Liukkonen, Jorma Mustalahti, Ilkka Martikainen
  • Publication number: 20140265718
    Abstract: A method of manufacturing a rotor core includes a first process of punching out punched holes 22, 23 forming outlines of keys 13, 14 in a thin metal strip 18, the holes 22, 23 including inside areas 25 located inside a shaft hole 12 and outside areas 26 continuous from the areas 25 and located outside the hole 12; a second process of punching out the hole 12 including recesses 35, 36 to avoid the keys 13, 14 and communicating with the holes 22, 23; and a third process of punching out an outline of a core sheet 11 having the hole 12 and laminating the sheets 11. Thereby, a shaft hole having keys is formed precisely, a thickness deviation of core sheets is eliminated, and a rotor core having homogeneous magnetism is provided.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: MITSUI-HIGH-TEC, INC.
    Inventors: Daisuke Komiya, Toshio Goto
  • Patent number: 8829742
    Abstract: The present invention is a high efficiency permanent magnet machine capable of maintaining high power density. The machine is operable over a wide range of power output. The improved efficiency is due in part to copper wires with a current density lower than traditional designs and larger permanent magnets coupled with a large air gap. In a certain embodiment wide stator teeth are used to provide additional improved efficiency through significantly reducing magnetic saturation resulting in lower current. The machine also has a much smaller torque angle than that in traditional design at rated load and thus has a higher overload handling capability and improved efficiency. In addition, when the machine is used as a motor, an adaptive phase lag compensation scheme helps the sensorless field oriented control (FOC) scheme to perform more accurately.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: September 9, 2014
    Inventors: Xinzhang Wu, Hanzhou Liu, Yang Hu, Louis Chow, Jon Harms, Martin Epstein, Wei Wu
  • Patent number: 8760030
    Abstract: This motor/generator produces rotational torque and/or electrical energy employing a flexible magnetically permeable circular band as a rotor that in operation is in physical contact with the stator, arching and curving forward in response to advancing magnetic fields along the stator surface. The stator may be comprised of either a typical three-phase winding, or a series of magnetic actuators arranged in a toroid for which the rotor band acts as a continuous armature. The rotor rotates as follows: an actuator to the left or right of an active actuator is activated to pull a rotor arch down to the stator surface; as this occurs, the previously active actuator is turned off and that part of the rotor springs away; the rotor moves clockwise or counterclockwise as the arches of the rotor are advanced forward or backward, respectively. Differential rotor movement provides speed reduction and torque enhancement without gears.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: June 24, 2014
    Inventors: David A. Ross, Emik A. Avakian
  • Patent number: 8760024
    Abstract: In an arrangement in accordance with the invention for attaching a permanent magnet to an electrical machine's rotor, the rotor comprises at least two magnetic poles, and there is a pole gap between two magnetic poles. Permanent magnets are installable on the surface of the magnetic core. A pole piece is installable on the permanent magnet side facing the air gap. There is fixing means on the sides of the pole piece facing the pole gap for attaching the pole piece to the rotor using the locking parts, and the fixing means are connected to the pole piece through an articulated joint.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: June 24, 2014
    Assignee: ABB Technology AG
    Inventors: Petri Mäki-Ontto, Yrjö Tyllinen, Pekka Kanninen
  • Patent number: 8754567
    Abstract: An electric generator comprises a line; a cage having a plurality of magnets secured to the cage, wherein the cage is hanging from the line; and conductive coils surrounding the cage, wherein the cage receives a force causing the cage to rotate and wherein electricity is generated at the conductive coils when the cage rotates.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: June 17, 2014
    Inventor: Kachon Sitou
  • Patent number: 8749111
    Abstract: A motor include a rotor to rotate a drum of the washing machine, and the rotor includes a base, a ring-shaped rib formed at the edge of the base, and a back yoke ring connected to the ring-shaped rib. The back yoke ring is inserted into the ring-shaped rib while the base is formed by injection molding.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: June 10, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woon Yong Lee
  • Publication number: 20140145537
    Abstract: In one embodiment, a motor has a rotor with an approximated ellipsoid shape defined by a plurality of lattice lines and a plurality of lattice points. The motor has a matching stator that is configured to be utilized in conjunction with the approximated ellipsoid shaped rotor and to accommodate the approximated ellipsoid shaped rotor. The motor may also includes a housing unit configured to hold the matching stator that is utilized in conjunction with the approximated ellipsoid shaped rotor, and an enclosure lid configured to be used by the housing unit. The enclosure lid may be configured to hold the rotor having the approximated ellipsoid shape with a bearing.
    Type: Application
    Filed: January 30, 2014
    Publication date: May 29, 2014
    Applicant: FXQ Engineering Group, LLC
    Inventors: Filipe Goncalves, Chong Kyu Kim
  • Patent number: 8729769
    Abstract: An electromechanical device includes: a center shaft; a rotor having a rotor magnet disposed around an outer periphery of the center shaft; and a stator disposed on an outer periphery of the rotor, wherein the center shaft is formed of a carbon-fiber-reinforced plastic, and when projection is performed in a radial direction from the center shaft toward the rotor magnet, an angle between a direction of carbon fiber in the carbon-fiber-reinforced plastic and a direction of the center shaft is 45°.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: May 20, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Kesatoshi Takeuchi
  • Patent number: 8729768
    Abstract: The invention relates to a rotor including a magnetic material. At least one surface section of the magnetic material is provided with a wear-resistant coating.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: May 20, 2014
    Assignee: Grundfos Management a/s
    Inventors: Helge Grann, Uffe Staehr, Oluf Kjaer
  • Patent number: 8723402
    Abstract: A structure of an electromagnetic machine includes an outer support member configured to support a conductive winding or a magnet. The structure further includes an inner support member, a first elongate compression member, a second elongate compression member, and an elongate tension member. The first elongate compression member and the second elongate compression member each include a first end portion coupled to the outer support member and a second end portion coupled to the inner support member to resist radial and axial deflection of the outer support member relative inner support member. The elongate tension member includes a first end portion coupled to the first compression member and a second end portion coupled to one of the inner support or the second elongate compression member to resist rotational deflection of the outer support member relative to the inner support member.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: May 13, 2014
    Assignee: Boudler Wind Power, Inc.
    Inventor: Francisco Javier Oyague
  • Publication number: 20140097711
    Abstract: A one piece rotor hub/shaft includes a hub portion having an outer annular surface, an axial end integrally formed with the outer annular surface, and a shaft section extends from, and is integrally formed with, the axial end.
    Type: Application
    Filed: October 5, 2012
    Publication date: April 10, 2014
    Inventor: Larry Kubes
  • Patent number: 8692433
    Abstract: A rotor (or a stator) for a superconducting electrical machine includes a mounting that is maintained at substantially ambient temperature during operation of the electrical machine and a field coil support structure. A plurality of superconducting field coils are maintained at cryogenic temperatures during operation of the electrical machine and are supported by the field coil support structure. At least one coupling element is used to fix the field coil support structure to the mounting. The field coil support structure is preferably fixed to the mounting by a plurality of substantially circumferentially extending coupling elements at a first and second axial end of the field coil support structure and the mounting such that the mounting and field coil support structure are substantially separated over their axial lengths by a vacuum gap.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: April 8, 2014
    Assignee: GE Energy Power Conversion Technology Limited
    Inventors: Joseph Eugene, Graham Derek Le Flem
  • Patent number: 8671552
    Abstract: An electrical machine includes a stator and a rotor. The stator has a central opening that is configured to receive the rotor. The rotor includes a generally cylindrical first section comprising a first material mounted on an axially extending shaft within the central opening. The rotor further includes a second section having a second material of a predetermined thickness that is coated directly on at least a portion of the first section. The second material has a higher electrical conductivity relative to the first material.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: March 18, 2014
    Assignee: General Electric Company
    Inventors: James William Bray, Kiruba Sivasubramaniam, Manoj Ramprasad Shah
  • Publication number: 20140062243
    Abstract: An internal rotor motor, in particular an electronically commutated internal rotor motor, has a multi-pole stator (28) and a rotor lamination stack (37; 52, 54, 56) mounted rotatably relative to said stator; furthermore a central bore is provided in the rotor lamination stack, the rotor lamination stack comprising individual laminations (41) whose respective central openings (47) comprise radially inwardly projecting first portions or tabs (50) into which a rotor shaft (18) is press-fitted, and said central openings (47) comprise, in angular sectors between the first portions (50), second portions (51) that, in the assembled state, are spaced away from the outside of the shaft (18), at least some (axially central) ones of the individual laminations (41) of the rotor lamination stack (52) being arranged with an angular offset from one another.
    Type: Application
    Filed: July 12, 2012
    Publication date: March 6, 2014
    Applicant: EBM-PAPST ST. GEORGEN GmbH & Co. KG
    Inventors: Dominik Falk, Arnold Schulde, Mojtaba Moini