Rotor Passage Patents (Class 310/61)
  • Patent number: 10707727
    Abstract: A stator sleeve for use in an integrated drive generator has a body extending between a first end and a second end and has a generally cylindrical inner peripheral surface. An outer peripheral surface has a plurality of circumferentially extending ribs define intermediate oil cooling channels. An integrated drive generator and a method are also disclosed.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: July 7, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Derek R. Hochstetler, Ted A. Martin, Duane C. Johnson, Glenn C. Lemmers, Jr.
  • Patent number: 10666114
    Abstract: A motor includes a shaft, a bearing mechanism rotatably supporting the shaft, a cylindrical rotor main body fixed to the shaft, a rotor fan fixed to the shaft, an armature, and a housing. The bearing mechanism includes a first bearing above the rotor fan in the housing and facing the rotor fan in an up and down direction. The housing includes a first opening, a second opening, and a bearing holding portion. A cylindrical wind tunnel portion is outward of the rotor fan in a radial direction. An inner surface of the wind tunnel portion and the rotor fan face each other in the radial direction. An upper end portion of the inner surface of the wind tunnel portion and an outer surface of the bearing holding portion face each other in the radial direction.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: May 26, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yusuke Makino, Satoshi Kajikawa
  • Patent number: 10655532
    Abstract: A charging device for an internal combustion engine with rotor cooling has a shaft, a compressor wheel mounted on the shaft, a stator housing and a stator. The stator is arranged in the stator housing. The charging device additionally has a rotor arranged rotatably fixed on the shaft The rotor is surrounded by the stator. A first fan device is arranged for common rotation with the shaft in order to generate a circulating air flow in the stator housing for cooling the rotor.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: May 19, 2020
    Assignee: BorgWarner Inc.
    Inventors: Stefan Jacob, Volkmar Gauckler
  • Patent number: 10658895
    Abstract: Coolant flow channels include a main flow channel that is spaced apart from a magnet accommodating aperture on an inner circumferential side, and that passes axially through a rotor core; a magnet cooling flow channel that is formed on an inner circumferential side of a permanent magnet, an inner circumferential surface of the permanent magnet being a portion of the magnet cooling flow channel; and a relay flow channel that passes axially through the rotor core in a state in which the main flow channel and the magnet cooling flow channel are linked, a first end plate opens a first axial end of the main flow channel, and closes a first axial end of the magnet cooling flow channel and the relay flow channel, and a second end plate opens second axial ends of the main flow channel, the magnet cooling flow channel, and the relay flow channel.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: May 19, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Higashino, Yoshiaki Kitta
  • Patent number: 10634155
    Abstract: A pump drive unit for conveying a process fluid includes a housing which surrounds a pump having an impeller, a drive for the pump, a shaft for driving the impeller which connects the drive to the pump, and a restrictor extending around the shaft and arranged between the impeller and the drive. The housing has a pump inlet and outlet for the process fluid, with an inlet for introduction of a barrier fluid into the drive and an outlet for draining the barrier fluid from the housing. A plurality of storage chambers for the barrier fluid are disposed at the shaft in the region between the restrictor and the drive. The storage chambers are arranged behind one another with respect to the axial direction, with a respective two adjacent storage chambers being in flow communication with one another.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: April 28, 2020
    Assignee: SULZER MANAGEMENT AG
    Inventor: Paul Meuter
  • Patent number: 10637329
    Abstract: A hybrid motor assembly, including: an axis of rotation; a torque converter; an electric motor including a stator and a rotor; and a rotor carrier. The torque converter includes: a cover arranged to receive torque; an impeller non-rotatably connected to the cover; and a turbine in fluid communication with the impeller. The rotor carrier is connected to the rotor and includes a cooling chamber. The cooling chamber is bounded at least in part by the rotor, is sealed from the stator, and is arranged to receive cooling fluid.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: April 28, 2020
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Gregory Heeke
  • Patent number: 10608491
    Abstract: Coolant flow channels include a main flow channel that is spaced apart from a magnet accommodating aperture on an inner circumferential side, and that passes axially through a rotor core; a magnet cooling flow channel that is formed on an inner circumferential side of a permanent magnet, an inner circumferential surface of the permanent magnet being a portion of the magnet cooling flow channel; and a relay flow channel that passes axially through the rotor core in a state in which the main flow channel and the magnet cooling flow channel are linked, a first end plate opens a first axial end of the main flow channel, and closes a first axial end of the magnet cooling flow channel and the relay flow channel, and a second end plate opens second axial ends of the main flow channel, the magnet cooling flow channel, and the relay flow channel.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: March 31, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Higashino, Yoshiaki Kitta
  • Patent number: 10502222
    Abstract: A number of variations may include a product comprising: a turbomachinery device comprising: an electric motor surrounding a portion of a shaft constructed and arranged to selectively drive the shaft in rotation about a rotational axis, wherein the electric motor further comprises a stator comprising a lamination stack; a housing surrounding the electric motor, wherein the housing includes a plurality of channels constructed and arranged to lubricate a first bearing; and wherein the lamination stack includes at least one retention component wherein the retention component is constructed and arranged to locking the stator in an axial direction while locking rotation of the stator about the rotational axis and wherein the retention component further comprises at least one conduit constructed and arranged to pass fluid through the electric motor to a second bearing.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: December 10, 2019
    Inventors: Brock S. Fraser, Allen D. Stoner, II
  • Patent number: 10494758
    Abstract: Dryer appliances, including methods of operation, are provided herein. The dryer appliance may include a cabinet, a drum, a ventilation assembly, an air handler, and a controller. The drum may be rotatably mounted within the cabinet. The drum may define a drying chamber. A ventilation assembly may be attached to the drying chamber. The ventilation assembly may include a conduit defining an exhaust passage in fluid communication with the drying chamber. The conduit may extend from an inlet at the drying chamber to an outlet defined through the cabinet. The air handler may be attached to the conduit in fluid communication with the drying chamber to draw air through the exhaust passage. The controller may be in operable communication with the air handler and the drum, and may be configured to initiate a dry cycle.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: December 3, 2019
    Assignee: Haier US Appliance Solutions, Inc.
    Inventor: Ionelia Silvia Prajescu
  • Patent number: 10396628
    Abstract: A drive device that includes a cylindrical rotor core of a rotary electric machine, a rotor shaft that supports the rotor core from a radially inner side, and a power transfer shaft coupled such that the power transfer shaft rotates together with the rotor shaft, wherein: the rotor shaft is formed in a tubular shape that has an outer peripheral surface that contacts an inner peripheral surface of the rotor core; and the power transfer shaft is disposed radially inward of the rotor shaft.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: August 27, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Meio Gi, Katsutoshi Shimizu, Yasunori Oguri, Kenji Sasaki, Katsunori Miyoshi
  • Patent number: 10355566
    Abstract: A production line (100,200,300,400) for manufacturing wound core components (10,10?) of a dynamo electric machine, comprising a central processing zone (101) provided with at least a winder (104,104?) for winding coils (15) to produce wound core components, a downstream processing zone (111) for finishing the wound core components. The production line further comprises a first load and unload device (105) for transferring the core components to be wound to at least a winder (104,104?) from a waiting position (103a), or from an upstream transport carrier (108a), located at a first position (G), for transferring core components to be wound from an upstream processing zone (201). The first load and unload device (105) transferring wound core components from the at least a winder (104,104?) to a downstream transport carrier (108b), located at a second position (A), for transferring wound core components to the downstream processing zone (111).
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: July 16, 2019
    Assignee: ATOP S.p.A.
    Inventor: Marco Santandrea
  • Patent number: 10326335
    Abstract: The present application provides a radial counter flow jet gas cooling system for a rotor of a dynamoelectric machine. The radial counter flow jet gas cooling system may include a centering pin, a number of axial inlet ducts, a number of radial outlet ducts in communication with the axial inlet ducts, an axial subslot positioned about the axial inlet ducts, and a radial counter flow duct in communication with the axial subslot and extending along the centering pin.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: June 18, 2019
    Assignee: General Electric Technology GmbH
    Inventors: Moonjanattu Mathew Binu, Satish Srinivasan
  • Patent number: 10284033
    Abstract: A rotor for a reluctance machine is provided. The rotor includes a soft magnetic element which is cylindrical in shape. The soft magnetic element has recesses forming flux barriers. At least part of the recesses are filled with an electrically conducting and magnetically non-conducting filler material such that a starting cage is formed in a peripheral region of the rotor. The ratio of the surface of the filled region of the flux barriers to the surface of the region of the unfilled flux barriers is at least 0.2 for at least one rotor cycle.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: May 7, 2019
    Assignee: KSB Aktiengesellschaft
    Inventors: Boris Janjic, Jochen Schaab
  • Patent number: 10227985
    Abstract: A motor-driven centrifugal pump for circulating a coolant in a primary circuit of a nuclear reactor comprises a sealed motor unit, a hydraulic part and a shaft which is immersed in the coolant, turned by the sealed motor unit and pumping the coolant by means of an impeller of the hydraulic part secured to the shaft; the motor unit comprising a dry stator and an immersed rotor mounted securely on the shaft. The motor-driven pump also comprises an immersed flywheel mounted securely on the shaft between the rotor of the motor unit and the impeller of the hydraulic part, allowing a minimum slowing-down time after the electrical power supply is cut; the flywheel comprising a vaned wheel generating a circulation of the coolant to cool the motor unit.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: March 12, 2019
    Assignee: CLYDE UNION S.A.S.
    Inventors: Stéphane Mauvais, Bruno Soudy, Cécile Bras, Sylvain Stihle, Olivier Caregnato
  • Patent number: 10205366
    Abstract: Disclosed herein is an electric compressor. The electric compressor includes an inverter cover which is mounted to an outer surface of a compressor housing in which compression of refrigerant is implemented, and a printed circuit board which is disposed inside the inverter cover and mounted with a plurality of heat generating elements that come into surface contact with one surface of the compressor housing and perform heat transfer with low-temperature refrigerant supplied into the compressor housing.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: February 12, 2019
    Assignee: HANON SYSTEMS
    Inventors: Il Young Park, Chan Ho Baek, Young Hun Lee
  • Patent number: 10199893
    Abstract: A rotor of a rotary electric machine, which is supported by a rotating shaft, includes a rotor core, and a permanent magnet embedded in the rotor core. At least one in-core cooling medium passage that leads a cooling medium supplied from an in-shaft cooling medium passage formed inside the rotating shaft to an outer peripheral end of the rotor core, and discharges the supplied cooling medium into a gap between the rotor core and a stator, is formed in the rotor core. The at least one in-core cooling medium passage includes a center cooling medium passage, a pair of inner peripheral side cooling medium passages, and an outer peripheral side cooling medium passage that is communicated with the gap. A radially outside end portion of the center cooling medium passage has a slope that extends toward a radially outer side closer to a center in the axial direction.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: February 5, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Toshinori Okochi
  • Patent number: 10128701
    Abstract: An electric motor cooling system is provided utilizing axial cooling channels that are integral to the stator teeth, thus allowing direct contact between the circulating coolant and the lamination stack and providing an efficient means of removing motor assembly heat. Additionally, as the coolant flows out of the cooling channels it impinges on the end windings, thereby providing a secondary means of cooling the motor assembly.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: November 13, 2018
    Assignee: ATIEVA, INC.
    Inventors: Emad Dlala, Richard J. Biskup, David Moseley, Aberto Bassanese, Balaji Maniam, Jeremy Mayer
  • Patent number: 10128704
    Abstract: A rotor core includes at least one core refrigerant passage configured to release a refrigerant to a gap between the rotor core and a stator. The core refrigerant passage includes: a central refrigerant passage provided radially inside a permanent magnet so as to extend in an axial direction, the central refrigerant passage being opened on axial end surfaces of the rotor core; an inner refrigerant passage communicating the shaft refrigerant passage with the central refrigerant passage; an outer refrigerant passage communicating the central refrigerant passage with the gap; and dams provided on both axial-end sides of the central refrigerant passage relative to the outer refrigerant passage so as to project toward a radially inner side from a radially outer side in the central refrigerant passage.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: November 13, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Toshinori Okochi
  • Patent number: 10084355
    Abstract: An electrical machine is disclosed comprising a stator cavity. The stator cavity is axially divided by a distribution plate into a winding chamber containing stator windings of the electrical machine and a handling chamber. The handling chamber has one of a fluid inlet and a fluid outlet and the winding chamber has the other of the fluid inlet and fluid outlet. In use fluid is passed from the fluid inlet to the fluid outlet via the handling chamber, the winding chamber and an array of fluid passages in the distribution plate providing fluid communication between the handling chamber and winding chamber. The array of fluid passages comprises passages of at least two different cross-sectional areas.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: September 25, 2018
    Assignee: ROLLS-ROYCE plc
    Inventors: Geraint W Jewell, Ellis F H Chong, Maurice Shortte
  • Patent number: 10081518
    Abstract: Embodiments are directed an elevator machine comprising: a stator assembly, and a plurality of support plates coupled to the stator assembly, wherein a respective at least one of the support plates is coupled on each end of the stator assembly and configured to enable the stator assembly to expand radially and axially in a substantially uniform manner over a range of temperatures.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: September 25, 2018
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: James L. Hubbard, Zlatko Strbuncelj
  • Patent number: 10003236
    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: October 30, 2017
    Date of Patent: June 19, 2018
    Assignee: Nidec Motor Corporation
    Inventors: Daniel E. Bailey, Daniel E. Hilton, Philip S. Johnson, Gregory M. Levine
  • Patent number: 9997973
    Abstract: The invention relates to a motor housing for an electric motor with a stator as well as to an electric motor with a housing, whereby at least one multifunctional opening is arranged in the lower housing section and whereby electronics can be arranged in the housing, characterized in that, in order to cool the electronics, the multifunctional opening has a baffle by means of which an air flow can be directed towards the electronics, and, as an alternative, it has an offset on the side facing the upper housing section in order to mechanically connect the stator to the lower housing section.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: June 12, 2018
    Assignee: EBM PAPST MULFINGEN GmbH & CO. KG
    Inventors: Rainer Müller, Matthias Hennegriff, Christian Rückert
  • Patent number: 9917486
    Abstract: An electric motor assembly including a stator having a stator core and windings around the stator core is disclosed. The stator core has opposing ends and an outer surface extending between the opposing ends. The electric motor assembly also includes a housing having an inner surface enclosing at least a portion of the stator, and at least one fluid passage between the outer surface of the stator core and the inner surface of the housing. The fluid passage permits a coolant in the fluid passage to contact one or more portions of the outer surface of the stator core to remove heat from the stator core during operation of the electric motor assembly. Additional motor assemblies including stator and/or rotor cooling features are disclosed.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: March 13, 2018
    Assignee: Nidec Motor Corporation
    Inventors: Thomas E. Kirkley, Jr., Lawrence J. Wittman, Andrew F. Poag, Steven P. Randall
  • Patent number: 9800103
    Abstract: A rotor for a reluctance motor includes a laminated core having a number of rotor sheet metal blanks. Each rotor sheet metal blank includes flux barriers cast with a non-ferromagnetic casting compound and at least one soft-magnetic rotor sheet which delimits the flux barriers. Flux barriers of adjacent rotor sheet metal blanks are arranged offset relative to one another so that the flux barriers of one of the adjacent rotor sheet metal blanks are delimited in an axial direction at least partially by the rotor sheets of the other one of the adjacent rotor sheet metal blanks, with the casting compound of the flux barriers adhering in an adhesion zone to the rotor sheets.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: October 24, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Klaus Büttner, Matthias Warmuth, Norbert Wöhner
  • Patent number: 9793783
    Abstract: A rotor related to the present invention is for a rotary electric machine. The rotor includes a rotor core and magnets. The rotor core has a plurality of core refrigerant passages. The core refrigerant passage each includes an inlet passage, a magnet cooling passage and an outlet passage. The inlet passage is configured such that a liquid refrigerant flows into the inlet passage from a shaft refrigerant passage. The magnet cooling passage is configured such that the liquid refrigerant flows into the magnet cooling passage from the inlet passage. The magnet cooling passage extends in an axial direction. The outlet passage is configured to flow the liquid refrigerant from the magnet cooling passage to a gap. An axial position of the outlet passage in the rotor core is at one place at a central position in the axial direction.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: October 17, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroyuki Hattori
  • Patent number: 9772142
    Abstract: A water-cooling device includes a main body having a pump chamber and a heat exchange chamber, which are partitioned from each other by a water room partitioning board. The water room partitioning board has a communication section for communicating the pump chamber with the heat exchange chamber. A pump unit is disposed in the pump chamber. A heat transfer unit is disposed in the heat exchange chamber. A cooling fluid is filled up in the pump chamber and the heat exchange chamber. The water-cooling device has greatly enhanced heat dissipation performance. Moreover, the water-cooling device is free from the problem of overheating of the stator assembly in operation.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: September 26, 2017
    Assignee: Asia Vital Components Co., Ltd.
    Inventor: Bor-Bin Tsai
  • Patent number: 9735654
    Abstract: An electric motor/generator includes a rotor with magnets mounted on the surface of the rotor, the magnets facing the stator over a gap. The magnets have a very high flux density but a limited ability to withstand high stator currents at high temperatures, preferably magnets made of the N48H material. By providing rotor magnet cooling means that reduces the temperature of the magnets by a cooling fluid, use of magnets with lower maximum working temperature and higher flux density is permitted and thereby higher flux can be obtained from the magnets.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: August 15, 2017
    Assignee: STRIDSBERG INNOVATION AB
    Inventor: Lennart Stridsberg
  • Patent number: 9709012
    Abstract: A method and apparatus for determining a characteristic of an injector are set forth. In one example, a compressed gas is applied to the inlet chamber of the injector while the spoolvalve is closed until the pressure of the compressed gas in the inlet chamber reaches a predetermined pressure. A change in pressure of the compressed gas in the inlet chamber is measured over time while the spool valve is closed. The pressure change measurement corresponds to the characteristic of the injector that is to be determined.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: July 18, 2017
    Assignee: International Engine Intellectual Property Company, LLC.
    Inventors: Paul Curtis, Raymond Mueller
  • Patent number: 9689627
    Abstract: A water-cooling module includes a main body. The main body has a receiving space and a water room partitioning board. The receiving space is partitioned by the water room partitioning board into a pump chamber and a heat exchange chamber. The pump chamber and the heat exchange chamber communicate with each other through at least one communication section. A pump unit is disposed in the pump chamber. A heat transfer unit is disposed in the heat exchange chamber. A cooling fluid is filled up in the main body to circulate within the pump chamber and the heat exchange chamber. The pump unit is entirely immersed in the cooling fluid so that the operation efficiency of the pump unit is enhanced and the main body is thinned. Moreover, the problem of overheating of the pump unit in operation is solved.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: June 27, 2017
    Assignee: Asia Vital Components Co., Ltd.
    Inventor: Bor-Bin Tsai
  • Patent number: 9647505
    Abstract: A rotating electrical machine is configured such that, in a rotor coil, ventilation passages are formed in two lines arranged in a width direction of the rotor coil, and formed in the same shape at a plurality of positions spaced from each other in a longitudinal direction, 0.3?W1/W2?0.7 . . . (Expression 1) is satisfied, where (W1) is a width dimension of the ventilation passage in the longitudinal direction and (W2) is a width dimension from one end of the ventilation passage to one end of another ventilation passage adjacent thereto, and 0.025?W4/W3?0.08 . . . (Expression 2) is satisfied, where (W3) is a width dimension of the rotor coil and (W4) is a width dimension of the ventilation passage.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: May 9, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Naoki Yamamoto
  • Patent number: 9624908
    Abstract: An airflow control arrangement for a direct-drive wind-turbine with a generator comprising a rotor and a stator, which airflow control arrangement comprises an outflow fan arranged to draw an exit airflow through an exit duct, which exit duct extends from an interior cavity of the stator to the exterior of the wind turbine. The invention further describes a direct-drive wind turbine comprising such an airflow control arrangement. The invention further describes a method of controlling an airflow in a direct-drive wind-turbine with a generator comprising a rotor and a stator is provided.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: April 18, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Giovanni Airoldi, Uffe Eriksen, Soeren Gundtoft, Claus Michaelsen, Thorkil Munk-Hansen, Peter Hessellund Soerensen, Claus Thygesen, Xavier Tourde
  • Patent number: 9621010
    Abstract: A rotating electric machine (1) having a stator (4) in a housing (2) and a rotor (10) supported by a shaft (6). The housing (2) circumferential wall (12) and first and second axially opposing end walls (14, 16) support bearing flanges with bearings (18) for the shaft (6). Two cooling fan impellers (20, 22) are connected to the shaft (6). An inner cooling fan impeller (20) positioned inside the housing (2) generates an inner cooling air circuit (A) inside the housing (2). An outer cooling fan impeller (22) provided outside the housing (2), generates an outer cooling air flow (B). The first end wall (14) is formed with a thermal conductivity of at least a specified value and has an outer cooling rib geometry (28) on its outer side facing the outer cooling fan impeller (22), and an inner cooling rib geometry (30) on its opposing inner side.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: April 11, 2017
    Assignee: EBM-PAPST MULFINGEN GMBH & CO. KG
    Inventors: Reinhard Stillger, Christian Pfaff, Jens Krotsch, Martin Baun, Martin Baer, Tobias Ehmann, Mark Heinze, Reinhold Gerner, Christian Hammel
  • Patent number: 9473009
    Abstract: An electromagnetic actuator including: a core comprising a material having a high magnetic permeability relative to air; an array of coils sequentially arranged on the core, each coil of the array of coils being wound around the longitudinal axis of the core; and a magnet assembly movably mounted along the array of coils, the magnet assembly having a coil side facing the array of coils and an opposite side facing away from the array of coils and including an array of permanent magnets sequentially arranged along the array of coils in a direction parallel to the longitudinal axis, wherein the magnetic moments of the plurality of magnets are selected and arranged to augment the magnetic field produced on the coil side of the magnet assembly and to reduce the magnetic field produced on the opposite side of the magnet assembly.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: October 18, 2016
    Assignee: NUCLEUS SCIENTIFIC, INC.
    Inventors: Ian W. Hunter, Timothy A. Fofonoff, George C. Whitfield
  • Patent number: 9473000
    Abstract: The rotor for an electric machine comprises a shaft, a spider on the shaft, a laminated drum on the spider. The spider has a plurality of apart elements defining ducts between each other. The laminated drum has a plurality of cooling channels connected to the ducts. The rotor also has throttle elements associated to at least one duct and/or cooling channel.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: October 18, 2016
    Assignee: ALSTOM Renewable Technologies
    Inventors: Alexander Schwery, Stefan Baumeister
  • Patent number: 9419498
    Abstract: A rotary electric machine according to the present invention includes a stator including a stator core and stator coils, a rotor provided rotatably with a gap to the stator, a housing that stores the stator and the rotor, a fan that circulates air inside the housing through the gap in the housing, a heat exchanger that cools the air circulated by the fan, and an air guiding plate including an air guiding route formed therein for guiding the air cooled by the heat exchanger such that the cooled air flows into the gap without coming into contact with the stator coils.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 16, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Mamoru Kimura, Akiyoshi Komura
  • Patent number: 9331552
    Abstract: An electric motor cooling system is provided in which at least one heat pipe is captured within at least one hollow region within the motor's rotor shaft. An end of the heat pipe that extends out and away from the end of the rotor shaft is coupled to a heat exchanger, for example a heat sink in which the fins of the heat sink are shaped as fan blades. During motor operation, as the rotor heats up thermal energy is absorbed by the heat pipe within the rotor shaft and transferred to the heat sink for efficient removal.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: May 3, 2016
    Assignee: Tesla Motors, Inc.
    Inventors: Lev Fedoseyev, Edwin Marcum Pearce, Jr.
  • Patent number: 9148035
    Abstract: A superconducting electrical machine includes a rotor with a rotor outer housing surrounding a winding support having a superconducting winding. The rotor has on a torque-transmitting side a first, rigid connection device between the winding support and the rotor outer housing and on the opposite side a second connection device which compensates for axial expansion of the winding support. The second connection device has an axially extending connection element which is on one end connected rigidly to the winding support and which has on the opposite free end an axially moving, radially force-fitting connection to a centering holding element of the rotor outer housing. The holding element includes a bushing through the rotor outer housing, through which the free end of the connection element of the second connection device passes. The superconducting winding is cooled and thermally insulated.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: September 29, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Michael Frank, Peter Van Hasselt
  • Patent number: 9118232
    Abstract: A cooling system for an electric machine is provided. The cooling system includes an airflow restriction feature configured to provide airflow to a radial air channel of the electric machine.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: August 25, 2015
    Inventors: Qubo Li, Joel Hetrick
  • Patent number: 9065313
    Abstract: A centrifugal heat dissipation device and a motor using same are disclosed. The centrifugal heat dissipation device includes a main body having a shaft hole, a heat-absorption zone and a heat-transfer zone. The heat-transfer zone has a radially outer side connected to the heat-absorption zone and a radially inner side connected to the shaft hole. The shaft hole axially extends through the main body for receiving a shaft of a motor therein. A centrifugal force generated by the rotating shaft and accordingly, the heat dissipation device enables enhanced vapor-liquid circulation of a working fluid in the heat dissipation device, so that heat generated by the operating motor is absorbed by the centrifugal heat dissipation device and transferred to the shaft for guiding out of the motor, allowing the motor to have largely upgraded heat dissipation performance.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: June 23, 2015
    Assignee: Asia Vital Components Co., Ltd.
    Inventors: Shyy-Woei Chang, Kuei-Feng Chiang
  • Patent number: 9046105
    Abstract: A rotor for an electric motor includes a metal core, a plurality of electrical conductors arranged on the metal core, and a metallic corrosion protection layer enveloping the metal core and the plurality of conductors. The corrosion protection layer is laid as a solid body around the metal core and the conductors and fastened at least to the metal core. The corrosion protection layer is at least a part of a hot-pressing containment for isostatic pressing of the conductors in the metal core.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: June 2, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Martin Biesenbach, Ralf Bode
  • Patent number: 9041261
    Abstract: A rotating electrical machine includes a rotor which has a rotor core formed by stacking magnetic plates having an annular plate shape in an axial direction, a permanent magnet is inserted into a magnet insertion hole formed in the rotor core, and a rotor shaft is inserted into a shaft insertion hole surrounded by an inner peripheral surface of the rotor core; and a stator. A radial communication passage is formed by a communication penetration hole group that is formed by sequentially communicating a plurality of the penetration holes from a shaft insertion hole to a magnetic resistance hole in the radial direction. The plurality of the penetration holes are divided into at least two specific magnetic plates and formed such that the radial positions of the penetration holes are different from each other and the penetration holes partially overlap each other when viewed in the axial direction.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: May 26, 2015
    Assignee: AISIN AW CO., LTD.
    Inventors: Yoshihisa Yamamoto, Shinichi Otake, Takamasa Takeuchi, Masatoshi Sugimoto, Satoshi Murakami
  • Patent number: 9013075
    Abstract: Vent spacers and induction motor rotor core assemblies for induction motors are disclosed. The induction motor rotor assembly includes at least two rotor packages, each having axial sidewalls, a radial periphery, and axial vents, and a vent spacer positioned between opposing axial sidewalls of the at least two rotor packages. The vent spacer has a hub and a plurality of radially-extending fins coupled to the hub, the fins extending approximately to a radial periphery and extending axially between the opposed axial sidewalls to form a plurality of radial cooling channels extending between the sidewalls. Induction motors and methods of operating the induction motors are disclosed, as are other aspects.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 21, 2015
    Assignee: Siemens Industry, Inc.
    Inventor: Michael A. Graman
  • Publication number: 20150084456
    Abstract: An electric motor includes a stator operable to produce a magnetic field and defining an opening, and a rotor at least partially disposed within the opening. The rotor includes a shaft extending along a rotational axis, a plurality of first core portions each including a plurality of laminations stacked contiguously on the shaft, and a second core portion coupled between each of the first core portions. The first core portions and the second core portion cooperating to define a rotor magnetic core. A plurality of windings is coupled to the rotor magnetic core, and an air flow path is partially defined by the first core portions, the second core portion, and the shaft. The air flow path includes an axial portion that passes through the shaft axially along the rotational axis and a radial portion that extends radially outward through the second core portion.
    Type: Application
    Filed: December 5, 2014
    Publication date: March 26, 2015
    Inventors: Yi Jia Chang, Rafael Maynez
  • Patent number: 8987952
    Abstract: The present invention relates to an open rotary electric machine having a rotor mounted to rotate relative to at least one stator and co-operating with the stator to define at least one airgap, the rotor being suitable for rotating at least one fan having at least two channels, said fan including a first channel generating a first cooling air stream passing through the stator, and a second channel generating a second cooling air stream passing through the rotor, the fan including a solid web separating the first and second air streams.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: March 24, 2015
    Assignee: Moteurs Leroy-Somer
    Inventor: Alexis Dutau
  • Publication number: 20150069861
    Abstract: An electric machine includes a stator, a rotor interacting magnetically with the stator, a housing surrounding the stator and rotor, and a hollow shaft provided for arrangement of the rotor and mounted on the housing. A radial fan is mounted rotationally fixed on the hollow shaft on the ventilation side. A section of a fan blade of the radial fan extends axially away from the housing to a greater extent than the hollow shaft. A guide element with radially extending plate is arranged in the hollow shaft, wherein the plate is arranged axially further away from the housing than the end side of the hollow shaft on the ventilation side. An inner coolant flow can thus be delivered from the section of the fan blade out of the hollow shaft through a passage between the end side of the hollow shaft on the ventilation side and the plate radially outwards.
    Type: Application
    Filed: June 27, 2012
    Publication date: March 12, 2015
    Applicant: Siemens Aktiengesellschaft
    Inventors: Klaus Büttner, Klaus Kirchner, Michael Müller
  • Patent number: 8970075
    Abstract: A liquid-cooled, radial air gap electric motor includes a stator, a rotor, a rotor shaft, two end bells, a housing, a coolant manifold system, and a coolant sump. The rotor includes a plurality of axially directed slots located near its periphery. The coolant manifold system directs a first portion of liquid coolant to flow past some portion of the stator and a second portion of liquid coolant to flow through the rotor slots. Some or all of the liquid coolant is received by the coolant sump from which the coolant may be recirculated.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: March 3, 2015
    Assignee: AC Propulsion, Inc.
    Inventors: Wally E. Rippel, Christopher C. Moore, Paul F. Carosa
  • Patent number: 8963384
    Abstract: An electric motor assembly including a stator having a stator core and windings around the stator core is disclosed. The stator core has opposing ends and an outer surface extending between the opposing ends. The electric motor assembly also includes a housing having an inner surface enclosing at least a portion of the stator, and at least one fluid passage between the outer surface of the stator core and the inner surface of the housing. The fluid passage permits a coolant in the fluid passage to contact one or more portions of the outer surface of the stator core to remove heat from the stator core during operation of the electric motor assembly. Additional motor assemblies including stator and/or rotor cooling features are disclosed.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: February 24, 2015
    Assignee: Nidec Motor Corporation
    Inventors: Thomas E. Kirkley, Jr., Lawrence J. Wittman, Andrew F. Poag, Steven P. Randall
  • Patent number: 8952591
    Abstract: An electrical machine rotor includes a flux-conducting portion and a flux-inhibiting portion. The flux-conducting portion is conducive to conveying an electromagnetic flux and has a plurality of salient rotor poles and a portion of back material. The flux-inhibiting portion is less conducive to conveying an electromagnetic flux than the flux-conducting portion and is disposed entirely outside the boundaries of the rotor poles.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: February 10, 2015
    Assignee: Regal Beloit America, Inc.
    Inventor: Krishnan Ramu
  • Publication number: 20150015099
    Abstract: A motor includes: a shaft to which a rotor is attached and having an internal cooling medium passage in an inside of the shaft, a cooling medium passing through the internal cooling medium passage; a housing including the shaft disposed therein and configured to rotatably support the shaft; and a cooling medium reservoir provided in the housing and provided on an upstream side of an inlet of the internal cooling medium passage in a flowing direction of the cooling medium, the cooling medium reservoir being configured to store the cooling medium and then flow the cooling medium to the internal cooling medium passage.
    Type: Application
    Filed: October 19, 2012
    Publication date: January 15, 2015
    Inventors: Yasuhiko Matsuki, Akira Minamiura
  • Patent number: 8928195
    Abstract: On an inner circumference side of a stator fixed in an inner housing, a rotor is arranged. The rotor rotates through a bearing with respect to a center shaft that is a stationary shaft fixed to outer housings. Oil introduced into a rotor oil inlet path in the center shaft flows through a communication path and a clearance on an outer circumference of the center shaft into an oil path in the rotor. The oil flowing through the oil path cools a permanent magnet, lubricates the bearing, and is discharged from a rotor oil discharge port to the outside of the inner housing. The oil in the clearance is sealed with a thread seal, i.e., an inner thread formed in an inner face of an end ring and is prevented from flowing toward the bearing.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: January 6, 2015
    Assignee: IHI Corporation
    Inventors: Satoru Ohashi, Norihisa Handa, Shusaku Yamasaki, Masahiro Tanida, Koushi Ishimoto, Motoaki Shito