Patents Examined by Robert E. Mates
  • Patent number: 12034359
    Abstract: A rotary electric machine includes a stator extending along an axis and having teeth arranged about the axis. The teeth are circumferentially spaced apart by slots. Conductors extend around the teeth and through the slots. The conductors are electrically connected to one another to form phases. Cooling devices are provided in the slots. Each cooling device is fluidly connected to an inlet tube for supplying cooling fluid to the cooling device and an outlet tube for removing cooling fluid from the cooling device. A manifold includes a first cooling channel fluidly connected to each inlet tube and a second cooling channel fluidly connected to each outlet tube such that all the cooling devices in the machine are fluidly connected in parallel.
    Type: Grant
    Filed: December 27, 2022
    Date of Patent: July 9, 2024
    Assignee: LC Advanced Motor Technology Corporation
    Inventors: Dylan Broomfield, Russel Hugh Marvin, Matthew Honickman
  • Patent number: 12034352
    Abstract: A cooling jacket surrounding the stator of an electric machine, having an inlet and a plurality of outlets disposed at ends of the cooling jacket, distributed in circumferential direction and configured to create liquid jets exiting the cooling jacket in a radial direction towards end windings at the axial ends of the machine. Coolant liquid flow guiding elements within the cooling jacket are configured so as to create a circumferentially homogeneous or more homogenous axial liquid flow towards the liquid outlets and/or towards the liquid jet devices.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: July 9, 2024
    Assignee: DANA BELGIUM N.V.
    Inventor: Steven Vanhee
  • Patent number: 12027934
    Abstract: A vibration actuator includes: a fixing body including a hollow case and a coil, a movable body that includes a magnet, and an elastic supporting part that supports the movable body such that the movable body is freely movable with respect to the fixing body in the hollow case. The hollow case restricts a movement range of the movable body in the case by opposite end surface portions that are disposed to face each other at a distance from each other in the vibration direction of the movable body, the hollow case includes one or more vent holes, and the vent holes are disposed in a portion of at least one end surface portion of the opposite end surface portions, the portion being free from interference by the movable body.
    Type: Grant
    Filed: June 7, 2020
    Date of Patent: July 2, 2024
    Assignee: Minebea Mitsumi Inc.
    Inventors: Yuki Takahashi, Chikara Sekiguchi, Shigeyuki Shimomura, Yoshihiro Kumanomido, Daisuke Kodama, Yuta Yoshii, Shigenori Inamoto
  • Patent number: 12027943
    Abstract: An electric motor cooling jacket enclosing a surface of an electric motor stator and having protuberances adapted for contact with the surface of the stator, with fluid passageways formed by the cooling jacket body, the protuberances, and the surface of the electric motor stator, wherein the fluid passageways are arranged to permit a cooling fluid to flow in a serpentine path across the surface of the stator to remove heat from the stator. Spray rings are fluidly coupled with the fluid passageways so as to permit the cooling fluid to flow into the fluid passageways, across the outer circumference of the electric motor stator, and out from orifices in the spray rings to cool the windings of the stator. The protuberances are formable using a pair of mold halves aligned anti-symmetrically with one another so that a serpentine fluid path is formed when casting the cooling jacket body.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: July 2, 2024
    Inventors: Maximilian Hombsch, Steven Vanhee, Darren J. Ziskovsky
  • Patent number: 12000629
    Abstract: A hybrid cooling system for a hermetic motor includes an annular cavity in a motor housing that receives a vapor flow and an annulus in the motor housing that receives a liquid flow. The hybrid cooling system includes a sleeve disposed adjacent to the annular cavity and the annulus, where a radial opening is defined through the sleeve. The hybrid cooling system includes a stator at least partially surrounded by the sleeve, a gap defined between the stator and a rotor, and a vent slot of the stator configured to receive the vapor flow from the annular cavity through the radial opening of the sleeve and direct the vapor flow to the gap. The hybrid cooling system includes an exit path in the motor housing configured to direct an evaporated vapor flow, generated from the liquid flow contacting the stator, and the vapor flow out of the motor housing.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: June 4, 2024
    Assignee: Tyco Fire & Security GmbH
    Inventors: Paul William Snell, Matthew Lee Heisey, Tyler Alexander Wolgemuth, Katelynn Louise Crissman, Ian Michael Casper, David Andrew Bradshaw
  • Patent number: 11990824
    Abstract: The power transmission device has the rotating electric machine, the housing that houses the stator of the rotating electric machine, and the pipe as a refrigerant liquid feeding member that has the holes. In the upper part of the housing is provided the opening that introduces oil ejected from the holes. In the lower part of the housing is provided the oil reservoir that forms an oil pool.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: May 21, 2024
    Assignee: JATCO LTD
    Inventors: Daiki Tanaka, Akira Suwabayashi, Masahiro Kosaka
  • Patent number: 11982498
    Abstract: A cooling device having a surface configured to allow the circulation of a heat-transfer fluid along the surface in a first direction D1, an exchange of heat being able to take place by convection between the cooling device and the fluid, the device includes n cooling fins, n being an integer greater than or equal to one, each cooling fin forming a protuberance of the device, extending primarily in a plane (P) containing the first direction (D1), in each fin, at least two inserts having a tube form and a dimension characteristic of a section of the tube and extending primarily in a second direction (D2) of the plane P distinct from the first direction (D1), the inserts having, over their greater length, a thermal resistance lower than the thermal resistance of the cooling fin along the same length, each insert being distant in the first direction (D1) from another insert by a length equal to or greater than the characteristic dimension of the section of the tube of the insert.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: May 14, 2024
    Assignee: THALES
    Inventors: Ramdane Lateb, Jose-Carlos Magno
  • Patent number: 11984762
    Abstract: An example stator tube assembly includes a hollow body defining a cavity and having a longitudinal length and a radial thickness. The hollow body is configured to be disposed within a stator housing and to separate the cavity from a stator cavity within the stator housing. The hollow body comprises a first radial thickness along a first portion of its longitudinal length and a second radial thickness along a second portion of its longitudinal length, the second radial thickness being greater than the first radial thickness.
    Type: Grant
    Filed: October 4, 2021
    Date of Patent: May 14, 2024
    Assignee: Rolls-Royce Electrical Norway AS
    Inventors: Jørg Høyland, Roar Furuhaug, Tina Skare Pryde, Torbjørn Moi
  • Patent number: 11970973
    Abstract: An example system comprises an electric machine including a stator and a rotor, a cooling system configured to supply a cooling fluid to cool the electric machine, and a stator tube configured to contain the cooling fluid within a stator portion of the electric machine and prevent the cooling fluid from contacting the rotor.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: April 30, 2024
    Assignees: Rolls-Royce Corporation, Rolls-Royce Electrical Norway AS, Rolls-Royce North American Technologies, Inc.
    Inventors: Stephen Andrew Long, David Russell Trawick, Sean Morgan, Kolbeinn Kristjansson
  • Patent number: 11967888
    Abstract: An electric motor and inverter assembly and a method of assembly therefor, the electric motor and inverter assembly having a motor housing portion, a DC bus bar for electrically connecting a DC power source to an inverter power module where the DC bus bar is mounted on the housing portion, and a cooling channel disposed in between the housing portion and the DC bus bar for cooling the DC bus bar.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: April 23, 2024
    Assignee: DANA BELGIUM N.V.
    Inventors: Joachim Druant, Steven Vanhee
  • Patent number: 11909262
    Abstract: An electrical machine assembly includes a stator. The stator includes a core, windings assembled into the core, and a back iron heat exchanger mounted to the core. A first end plate is mounted at a first end of the core and back iron heat exchanger. A second end plate is mounted at a second end of the core and back iron heat exchanger opposite the first end plate. A coolant circuit passes from a coolant inlet in the back iron heat exchanger, through the back iron heat exchanger, into the first end plate, out of the first end plate, through the core, into the second end plate, and out of the second end plate.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: February 20, 2024
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Ashutosh Joshi, Debabrata Pal
  • Patent number: 11885312
    Abstract: A wind turbine includes a dynamoelectric machine including a liquid-cooled stator and a rotor interacting with one another. The stator includes a magnetically conductive body and a winding system which is embedded in slots of the magnetically conductive body and which includes a main insulation arranged between a conductor of the winding system and a slot wall and including at least one recess provided in a cooling-channel impression of the main insulation to form at least one axial cooling channel extending between the main insulation and the slot wall, so that the at least one cooling channel borders the slot wall without insulation in direct contact with the slot wall. The winding system includes end windings which are also liquid-cooled. A can separates the stator and the rotor from one another and enables different cooling media for the stator and the rotor.
    Type: Grant
    Filed: August 10, 2021
    Date of Patent: January 30, 2024
    Assignee: Flender GmbH
    Inventors: Claus Teringl, Michael Winklhofer
  • Patent number: 11855499
    Abstract: A voltage balanced winding for a stator of an electric machine with a high number of pole pairs is distributed over several circumferential sections and several radial layers of the stator. The winding consists of at least two phases and each phase of the winding comprises a plurality of conductor segments, one conductor segment for each layer in each sector. Each of the conductor segments comprises a plurality of straight conductor portions arranged in an axial direction of the stator and a plurality of end-windings connecting the straight conductor portions to a wave pattern. The voltage balanced winding is characterized in that the plurality of conductor segments is divided into branches of series connected conductor segments, wherein each branch includes at least D conductor segments selected from D different sections d and D different layers j such that (j+d) mod D equals a predefined number, with D being the number of circumferential sections.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 26, 2023
    Assignee: Elaphe Pogonske Tehnologije D.o.o.
    Inventors: Gorazd Lampic, Gorazd Gotovac, Martin Strojnik
  • Patent number: 11843281
    Abstract: A vehicle electric machine includes a housing and a stator having windings and a stator core. The core defines a plurality of axially extending cooling channels each having an entrance port at one end of the stator and an exit port at the other end of the stator. An end cover is connected to a first end of the housing defining a recessed cavity configured to receive the windings and defines an arcuate inlet manifold channel that extends in a circumferential direction of the stator to partially circumscribe the first cavity and that is in fluid communication with first ones of the axial cooling channels.
    Type: Grant
    Filed: October 1, 2021
    Date of Patent: December 12, 2023
    Assignee: Ford Global Technologies, LLC
    Inventors: Franco Leonardi, Michael W. Degner
  • Patent number: 11843297
    Abstract: Provided is a vibration actuator including: a movable body including a coil and a core around which the coil is wound; a fixing body including a magnet; and a shaft part turnably supporting the movable body with respect to the fixing body on a side of the one end part of the core. The movable body reciprocatingly and rotationally vibrates around the shaft part with respect to the fixing body by cooperation between the coil to be energized and the magnet. The magnet is disposed to face the other end part of the core in an extending direction of the core when energization is not performed. The magnet includes two magnetic poles having different polarities and arranged in a reciprocating and rotational vibration direction. A weight part is disposed in a notch on a side of the other end part of the core or in the coil.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: December 12, 2023
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Yoshihiro Gomi, Takanori Kato, Yuki Takahashi
  • Patent number: 11824402
    Abstract: An apparatus for cooling a coil of a motor includes a cooling cap unit covering an end coil of a stator coil bundle, coupled to a stator, and having, formed therein, a flow path through which fluid is able to flow; an inlet flow path unit formed at one part of the cooling cap unit, and forming an inlet path through which fluid is introduced into the cooling cap unit; an outlet flow path unit formed at the other part of the cooling cap unit, and forming an outlet path through which fluid is discharged to an outside of the cooling cap unit; and a cap fixing unit fixing the cooling cap unit to the stator or a motor housing.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: November 21, 2023
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Jung Yoon Lim
  • Patent number: 11824410
    Abstract: An electrical propulsion unit (EPU) for a vertical take-off and landing (VTOL) aircraft is provided. The EPU includes a propeller or a fan and an electric motor. The electric motor includes a stator comprising coils configured to carry current and a rotor arranged to interact with the stator. The rotor is configured to generate a torque for driving rotation of the propeller or the fan. The coils of the stator have a cumulated conductor volume Vconductor The stator, the rotor, or the stator and the rotor include a flux guiding iron material configured to guide magnetic flux generated by the coils of the stator, wherein the flux guiding iron material has a cumulated iron volume Viron, and wherein the electric motor has a machine parameter ? that is greater than or equal to 0.25, ? being defined as: ?=Vconductor/Viron.
    Type: Grant
    Filed: May 24, 2023
    Date of Patent: November 21, 2023
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventors: Ellis F H Chong, Andreas Reeh, Johannes Gabriel Bauer, Anton Rudenko
  • Patent number: 11817744
    Abstract: A stator for an electric machine of a motor vehicle includes a laminated core having an inner side with winding grooves and an outer side. Windings, which are arranged in the winding grooves, form winding heads on axially opposing front faces of the laminated core. A cooling jacket conducts cooling fluid and has a first metal sheet which forms an inner wall of the cooling jacket facing the laminated core, and a second metal sheet which forms an outer wall of the cooling jacket surrounding the inner wall. An axial height of the cooling jacket exceeds an axial height of the laminated core. The cooling jacket has a laminated-core cooling jacket region for encasing the laminated core and two axially opposing winding-head cooling jacket regions adjoining the laminated-core cooling jacket region for encasing the winding heads.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: November 14, 2023
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Felix Bolotnikov, Thomas Hoefler, Joachim Maerz, Jerome Ragot
  • Patent number: 11811294
    Abstract: An electric machine includes a stator formed from a plurality of stator laminations arranged in a first lamination group and a second lamination group that is circumferentially off-set from the first lamination group. The first lamination group and the second lamination group forming a tortuous flow path that extends axially across the stator. Each of the plurality of stator laminations of the first lamination group includes a body having an inner surface section and an outer surface section. The inner surface section includes a plurality of stator teeth. A plurality of cooling channel defining members is integrally formed with and extend radially outwardly from the outer surface section. Each of the plurality of cooling channel defining members being spaced from others of the plurality of cooling channel defining members by a corresponding gap.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: November 7, 2023
    Assignee: BORGWARNER INC.
    Inventor: Michael Duane Bradfield
  • Patent number: 11804764
    Abstract: Provided is a vibration exciter, comprising a shell having a receiving space, a vibration unit suspended in the shell, a coil configured to drive the vibration unit, and an elastic member configured to suspend the vibration unit in the shell. The vibration unit comprises a mass block fixedly connected to the elastic member. The mass block comprises fixing planes opposite to each other along a vibration direction. The elastic member has one end fixed to the mass block and another end fixed to the shell, and a projection of the elastic member in the vibration direction is at least partially located in the fixing planes. Compared with the related art, the vibration exciter provided by the present invention can improve the vibration stability.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: October 31, 2023
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Xudong Yan, Wei Liu, Keyong Zhou, Wenya Han, Yong You