Patents Examined by Thomas Truong
  • Patent number: 11515758
    Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: November 29, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Takanobu Oyama, Keisuke Fukunaga
  • Patent number: 11515750
    Abstract: A permanent magnet machine includes a machine housing and a stator disposed within the machine housing. The machine housing has an inner surface that extends between a first housing end and a second housing end along a central longitudinal axis. The stator has a stator core having an exterior surface and an interior surface, each extending between a first face and a second face along the central longitudinal axis. The stator core defines a plurality of openings that extend from the first face towards the second face.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: November 29, 2022
    Assignees: STEERING SOLUTIONS IP HOLDING CORPORATION, THE UNIVERSITY OF AKRON
    Inventors: Kenneth Webber, Delynn Streng, Iftekhar Hasan, Yilmaz Sozer, Alejandro J. Pina Ortega, Jeffrey T. Klass, Mohammed R. Islam
  • Patent number: 11515756
    Abstract: Methods and systems for cooling an electric motor are provided. An electric motor cooling system, in one example, includes a stator at least partially surrounding a rotor and an inner passage extending axially through the rotor and including an inlet and an outlet. The cooling system further includes an outer passage including an inlet in fluidic communication with the outlet of the inner passage and an outlet in fluidic communication with an inlet of the inner passage and a phase change material in the inner passage and the outer passage.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: November 29, 2022
    Assignee: Dana Belgium N.V.
    Inventors: Steven Vanhee, Maximilian Hombsch
  • Patent number: 11515749
    Abstract: A motor assembly includes a motor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: November 29, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Takayuki Migita, Yuki Ishikawa
  • Patent number: 11509176
    Abstract: A rotating electrical machine is equipped with a rotor and a stator. The rotor includes a magnet unit and a rotor core retaining the magnet unit. The rotor core is made of a stack of annular core plates and an annular end plate mounted on an end of the stack of the core plates. The end plate has a deformable wave shape. The stack of the core plates and the end plate has formed therein through-holes extending through a length thereof. Bar-shaped fastening members, such as rivets, which have flanges on ends thereof are inserted into the through-holes with the flanges pressing the end plate to elastically deform the wave shape of the end plate, thereby tightly gripping the stack of the core plates in the lengthwise direction. This minimizes concentration of stress on the core plates to eliminate a risk of damage or breakage of the rotor.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: November 22, 2022
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 11509205
    Abstract: A magnetic pole module, an electric motor rotor and a method for manufacturing the electric motor rotor are provided. The electric motor rotor includes a rotor yoke and multiple magnetic pole modules disposed on the rotor yoke, each of the magnetic pole modules including a base plate, a housing, and a pair of magnetic pole units that are accommodated in an accommodating space formed by the base plate and the housing and have opposite polarities, and a pair of magnetic pole units in each of the magnetic pole modules are spaced apart from each other by a first distance in a circumferential direction of the rotor yoke. The electric motor rotor can give consideration to the properties, such as cogging torque and torque pulsation, of a generator, the protection of magnetic poles and the mechanical fixation of the magnetic pole.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: November 22, 2022
    Assignee: BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT CO., LTD.
    Inventors: Yang Sun, Quan Song
  • Patent number: 11489380
    Abstract: According to one aspect of the present disclosure, a rotor includes a shaft, a rotor core including an inner core and a plurality of outer cores, a mold resin unit covering, the mold resin unit, and a plurality of permanent magnets. The mold resin unit includes a gate mark in a region between the outer cores adjacent to each other in the circumferential direction, and the gate mark is provided in all regions between the adjacent outer cores or in a region between the outer cores, the region being adjacent to a region between the even-numbered adjacent outer cores in which the gate mark is not disposed in all the regions between the adjacent outer cores.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 1, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Tomoya Ueda, Shinji Takemoto, Yusuke Isogai
  • Patent number: 11489382
    Abstract: The invention relates to a rotor for a synchronous drive motor including a plurality of rotor poles, each rotor pole having at least two magnetic layers arranged radially one behind the other, and each magnetic layer comprising a series of magnetic elements, which are formed by injection molding or casting, and solidification of permanent magnetic material in rotor cavities. According to the invention, at least a portion of the magnetic elements each include projections protruding on both sides in their radially inner halves to introduce centrifugal forces of the magnetic elements into the rotor. This ensures an improved possibility of supporting the magnetic elements where sufficient rotor material is available. As a result, it is possible to prevent the radially outer ends of the magnetic elements from abutting the wall of the rotor as a result of centrifugal forces, which reduces the loads and deformations in the webs and bridges between the magnetic elements or to the outer edge of the rotor.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: November 1, 2022
    Assignee: BRUSA Elektronik AG
    Inventors: Raphael Teufel, Tian Zhou, Daniel Oeschger
  • Patent number: 11489381
    Abstract: A rotor structure of an electric motor includes a rotor and a stator. The rotor is fixed to a motor shaft and rotates integrally with the motor shaft. The stator is fixed around the rotor. The rotor includes a cylindrical rotor core coaxially press-fitted and fixed to the motor shaft, a pair of ring-shaped end surface plates disposed facing two axial end surfaces of the rotor core, and permanent magnets respectively housed in slots penetrating an outer peripheral portion of the rotor core in an axial direction. A plurality of openings in which the permanent magnets are exposed are formed in a circumferential direction in an outer peripheral portion of one of the end surface plates, and a ring-shaped cover that covers the openings is detachably attached to an outer end surface of the outer peripheral portion of the end surface plate.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: November 1, 2022
    Assignee: Honda Motor Co., Ltd.
    Inventors: Andrii Pydin, Shigeru Koyama, Yasuhito Takei
  • Patent number: 11482898
    Abstract: The invention reduces tensile stress generated in the rotor core in a radial direction when a rotor core and a rotor support member are joined. A region in an axial direction (L) in which a melted joint portion (W2) for joining a rotor core (2) and a rotor support member (9) is formed is set as an axial joint region (JR). Among a plurality of corner portions (4c) of the permanent magnet (4), at least one corner portion (4c) that overlaps with the axial joint region (JR) when seen in a radial direction and that faces an outer peripheral surface (CP2) of the rotor core (2) is set as a specific corner portion (4s). Among facing surface portions (5p) of an inner wall portion of the magnet insertion hole (5) that face the corner portions (4c), the facing surface portion (5p) that faces the specific corner portion (4s) is set as a specific facing surface portion (5s).
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: October 25, 2022
    Assignee: AISIN CORPORATION
    Inventors: Hideharu Ushida, Tetsuya Matsubara, Takeshi Yokoyama
  • Patent number: 11482914
    Abstract: A rotary electric machine includes a rotor in which a plurality of permanent magnets are disposed along a rotation circumference and in which a magnetic pole of the permanent magnet is directed in a direction along a rotational axis and a stator in which a plurality of windings are disposed along the rotation circumference in a direction in which the magnetic pole of the permanent magnet is directed. The stator is formed in a direction in which a magnetic path from an end of the stator to an inside of the stator intersects a main magnetic flux direction from the rotor when the rotor is directed toward ends of first to four windings. A plurality of stators, provided along the rotational axis of the rotor, are respectively placed at positions at which gaps between the windings deviate from each other in a rotation circumference direction.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: October 25, 2022
    Assignee: KABUSHIKI KAISHA KUU
    Inventor: Katsuaki Fujino
  • Patent number: 11469633
    Abstract: A motor includes a rotor with one or more magnets, a rotor core holding the one or more magnets, a spacer that contacts the one or more magnets, and a rotor holder. The rotor holder includes a holder lid portion and a holder tubular portion in a tubular shape extending to one side in the axial direction from a radially outer edge of the holder lid portion. The holder lid portion includes a holder first surface that extends radially inward from an inner surface of the holder tubular portion, a holder second surface that extends radially and is radially inward of the holder first surface and on the other side in the axial direction, and a connecting surface connecting the holder first surface and the holder second surface.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: October 11, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Mitsuhiro Takemoto, Sho Fukuhara, Shinji Takemoto
  • Patent number: 11469632
    Abstract: A rotor unit for a brushless electric motor, incudes an annular rotor core surrounding a central axis, a plurality of magnet arrangements that are arranged around the rotor core in a circumferential direction of the rotor and that each have a convex outer peripheral face, an inner contact face, two axial end faces and two side faces pointing in the circumferential direction, a magnet holder having a number of holding portions which are each arranged between two adjacent magnet arrangements and are moulded onto a ring portion of the magnet holder. The holding portions are configured T-shaped in a cross section along a plane running transversely to the central axis and each have a shank portion and a head portion. The shank portion lies on the side faces of the magnet arrangements in a contact region and the head portion lies on the peripheral faces of the magnet arrangements.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: October 11, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Jürgen Schmid, Thomas Kübler, Kazunori Tategata
  • Patent number: 11469631
    Abstract: A rotor that is downsized while achieving high output of the electric motor is provided. The rotor includes a plurality of main magnets and a plurality of auxiliary magnets. The auxiliary magnets are fit into a plurality of respective grooves formed along a rotation shaft direction in an outer periphery of a rotation shaft arranged at the center of the rotor, are projected from the outer periphery of the rotation shaft to an outer side of a radial direction, and have a magnetization direction along a circumferential direction of the rotor. Magnetic field directions of the auxiliary magnets that are adjacent to each other are opposite to each other in the circumferential direction. The main magnets are arranged in projected parts of the auxiliary magnets that are adjacent to each other and have a magnetization direction that is along the radial direction of the rotor.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: October 11, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshihiro Okumatsu
  • Patent number: 11462958
    Abstract: An electric motor cooling system is provided that utilizes stator-integrated axial coolant channels and a coolant manifold centrally located within the stator to efficiently remove motor assembly heat. The coolant manifold includes a middle member that allows coolant to enter the axial coolant channels via transition laminations, where the transition laminations include coolant distribution channels that direct the flow of coolant entering into the manifold into the stator-integrated axial coolant channels.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: October 4, 2022
    Assignee: Atieva, Inc.
    Inventors: Emad Dlala, Jeremy Mayer, Barnaby James Gerard Lewis, Mohammad Mahmoudi
  • Patent number: 11462971
    Abstract: An electric fluid pump for a motor vehicle includes an electric drive motor which is brushless and electronically commutated. The electric drive motor includes a permanent-magnetic motor rotor having a motor shaft and at least two rotor poles, each of the at least two rotor poles having one permanent magnet embedded therein, a plurality of stator-side magnetic coils, at least two sensor magnets each emitting an axial magnetic field and each having polarities, and at least one Hall sensor which is arranged to lie eccentrically in a transverse plane so that the at least one Hall sensor detects the axial magnetic fields of the at least two sensor magnets. The at least two sensor magnets are magnetized diametrically. The at least one Hall sensor is arranged to detect the polarities of each of the at least two sensor magnets during one revolution of the permanent-magnetic motor rotor.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: October 4, 2022
    Assignee: PIERBURG PUMP TECHNOLOGY GMBH
    Inventors: Alessandro Malvasi, Christian Schulz, Frank Buerger, Martin Glogasa, Witold Joschko
  • Patent number: 11462957
    Abstract: An electric motor cooling system is provided that utilizes stator-integrated axial coolant channels and a coolant manifold centrally located within the stator to efficiently remove motor assembly heat. In order to improve end winding cooling uniformity, two or more end laminations are included on either end of the stator assembly which restrict and direct the flow of coolant exiting the axial coolant channels.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: October 4, 2022
    Assignee: Atieva, Inc.
    Inventors: Emad Dlala, Jeremy Mayer, Barnaby James Gerard Lewis, Mohammad Mahmoudi
  • Patent number: 11456634
    Abstract: The present disclosure provides a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric car. The rotor structure includes: a rotor body opened with a group of permanent magnet slots, wherein the group of permanent magnet slots include an inner-layer permanent magnet slot and an outer-layer permanent magnet slot which are arranged at intervals outwards along a radial direction of the rotor body; an inner-layer permanent magnet disposed within the inner-layer permanent magnet slot; an outer-layer permanent magnet disposed within the outer-layer permanent magnet slot, wherein the inner-layer permanent magnet and the outer-layer permanent magnet are arranged staggeredly.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: September 27, 2022
    Assignee: Gree Electric Appliances, Inc. of Zhuhai
    Inventors: Yusheng Hu, Bin Chen, Yong Xiao, Suhua Lu, Tong Tong
  • Patent number: 11456650
    Abstract: A method of manufacturing a rotor that includes a rotor core and a permanent magnet fixed to the rotor core using an adhesive, the method includes applying the adhesive, which contains a volatile agent, to an adhesive placement position of the permanent magnet; drying the adhesive by volatilizing the volatile agent by a magnet heater directly heating the permanent magnet such that a temperature of the permanent magnet becomes higher than a temperature of the adhesive after applying the adhesive; placing the permanent magnet on the rotor core after drying the adhesive; and fixing the permanent magnet to the rotor core by curing the adhesive after placing the permanent magnet.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: September 27, 2022
    Assignee: AISIN CORPORATION
    Inventors: Tetsuya Matsubara, Motoki Kori
  • Patent number: 11454459
    Abstract: A heat-sink base provided with heat-sink fin portions, a manufacturing method and a motor provided with the heat-sink base. The base is produced by pouring cast metal into a mold cavity to replace a pattern having a predetermined sublimation temperature. The base includes a preformed heat-sink member comprising a plurality of heat-sink fin portions and at least one anchor portion embedded at least partially in the pattern, and a base body comprising an enclosed base portion and a holder portion for receiving and holding the at least one anchor portion. By virtue of the invented method, the heat-sink member having an extremely thin thickness can be mounted on the base body and the overall surface area of the heat-sink base is increased considerably.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: September 27, 2022
    Assignee: Atieva, Inc.
    Inventor: Chia-Ming Chuang