Patents Examined by Tran Nguyen
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Patent number: 10050486Abstract: A motor bobbin having a bobbin body portion around which a coil is to be wound, and flange portions provided integrally to both end portions of the bobbin body portion. The bobbin includes: a molded resin article formed by using a polymer having amide linkages, and an insulating paper having an aramid paper made of an aramid fibrid and an aramid short fiber. The surface of the molded resin article and the aramid paper are directly bonded to each other. The motor bobbin can cope with an increased efficiency and an increased power output of a motor generator or the like.Type: GrantFiled: March 6, 2013Date of Patent: August 14, 2018Assignee: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.Inventors: Shinji Naruse, Tatsushi Fujimori, Chihiro Kondo, Yasunori Tanaka
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Patent number: 10038353Abstract: A dual-rotor electric rotating machine includes a stator and first and second rotors that are arranged with the stator interposed therebetween. The stator includes a stator core, at least one stator winding and a stator core support. The at least one stator winding is formed of a plurality of electric conductor segments each of which is substantially U-shaped to have a base and a pair of end portions. The electric conductor segments are received in slots of the stator core so that the end portions of the electric conductor segments are located on the same side of the stator core as the stator core support and the bases of the electric conductor segments are located on the opposite side of the stator core to the stator core support. Each corresponding pair of the end portions of the electric conductor segments are electrically connected with each other.Type: GrantFiled: March 18, 2015Date of Patent: July 31, 2018Assignee: DENSO CORPORATIONInventor: Shin Kusase
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Patent number: 10038352Abstract: A generator armature including a plurality of laminate sheets stacked to form an annular arrangement of armature teeth, whereby each pair of adjacent armature teeth is separated by an axial winding slot extending a direction essentially parallel to an axis of rotation of the generator; and a plurality of radial cooling channels, whereby a radial cooling channel is realized to transport a cooling medium and extends from an axial winding slot to an interior cavity of the generator, and wherein a radial cooling channel includes a series of aligned notches in the laminate sheets of a laminate stack is provided. A laminate sheet for an armature of a generator, a cooling arrangement, a generator, a wind turbine, and a method of cooling stator windings arranged on an armature of a generator is also provided.Type: GrantFiled: May 7, 2015Date of Patent: July 31, 2018Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Giovanni Airoldi, Mads Peter Zippor Leth Andersen, Erik Groendahl, Bo Nedergaard Jacobsen, Peter Hessellund Soerensen, Arwyn Thomas
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Patent number: 10033240Abstract: Disclosed is a motor including a housing, a stator arranged in the housing, a rotor unit arranged in the housing to rotate with the stator unit, and a rotating shaft rotating along with the rotor unit, wherein the housing includes a first housing in which the stator unit and the rotor unit are arranged, a second housing in which one end of the rotating shaft is arranged, and a third housing connected with the second housing.Type: GrantFiled: August 26, 2015Date of Patent: July 24, 2018Assignee: LG INNOTEK CO., LTD.Inventors: Seong Jin Kim, Kyung Sang Park, Chang Hyun Park
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Patent number: 10033235Abstract: A rotor for an electric machine comprises a central core, arms extending radially relative to the core, these arms each comprising two rims extending on either side of the arms, permanent magnets positioned inside housings that are delimited by opposing lateral faces of adjacent arms, an outer face of the core extending between adjacent arms, and the rims of the arms of the rotor. Plates made from a material more flexible than the permanent magnets are positioned between the rims of the arms and the face of the permanent magnet facing away from the axis of the rotor to hold the magnets. The plate having, in the axial direction, a height close to the height of the permanent magnets, the ratio between the width of the plate and that of the magnet being between 0.9 and 1.1, without being equal to 1.Type: GrantFiled: November 17, 2014Date of Patent: July 24, 2018Assignee: Valeo Equipments Electriques MoteurInventors: Lilya Bouarroudj, Mamy Rakotovao, Jean-Claude Matt
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Patent number: 10027192Abstract: An interior permanent magnet motor includes: a rotator; a stator; a permanent magnet inserted into a magnet accommodating hole; and a slit formed on a radially outer side of the magnet accommodating hole. A space portion is ensured between a radially outer surface of the permanent magnet and a rotator core in each region opposed to the slit. The permanent magnet is apart from the rotator core via the space portion in the each region opposed to the slit.Type: GrantFiled: June 12, 2013Date of Patent: July 17, 2018Assignee: Mitsubishi Electric CorporationInventors: Kazuhiko Baba, Koji Yabe, Masahiro Nigo, Tomoaki Oikawa
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Embedded permanent magnet-type electric motor, compressor, and refrigeration/air-conditioning device
Patent number: 10027193Abstract: Provided is an interior permanent magnet motor, including: a rotor including a plurality of permanent magnets; and a stator. The rotor further includes a rotor core. The rotor core has a plurality of magnet insertion holes. A plurality of slits are formed in a region of the rotor core, which is located on a radially outer side of the magnet insertion holes. At least two of the slits are formed so that a core region sandwiched between the two slits has a portion increased toward the radially outer side.Type: GrantFiled: April 22, 2014Date of Patent: July 17, 2018Assignee: Mitsubishi Electric CorporationInventors: Masahiro Nigo, Kazuchika Tsuchida -
Patent number: 10020719Abstract: Provided is a linear actuator which is simple in structure, inexpensive to manufacture, in addition, has small magnetic leakage, and can provide a large inertial force without increasing the number of parts and weight.Type: GrantFiled: June 11, 2015Date of Patent: July 10, 2018Assignee: SUNSTAR INC.Inventor: Masahiro Nishiura
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Patent number: 10014737Abstract: A rotor for an electric machine is mounted for rotation about an axis and includes a plurality of permanent magnets placed on a radial outer surface of the rotor for forming at least one magnetic pole pair. An anisotropically-soft sintered magnetic material having an easy direction and a hard direction is located in at least one section of the rotor radially further inward than the plurality of permanent magnets.Type: GrantFiled: September 9, 2015Date of Patent: July 3, 2018Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Ralf Fischer, Korbinian Petermaier, Rolf Vollmer
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Patent number: 10008898Abstract: An electric motor stator includes an armature surrounding a longitudinal opening for receiving a shaft, with longitudinal fins protruding from an outer surface of said armature; windings are wound within the armature and protruding beyond ends of the armature; and encapsulant seals the windings to the armature, such that the encapsulant serves as an outer housing for the windings.Type: GrantFiled: July 29, 2015Date of Patent: June 26, 2018Assignee: R&D Dynamics CorporationInventors: Alexander R. Nelson, Charles W. Buckley, Giridhari L. Agrawal
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Patent number: 10008893Abstract: In an interior permanent magnet motor, each of permanent magnets has a radially-inner magnet contour surface, a radially-outer magnet contour surface, and a pair of side-end magnet contour surfaces. Each of magnet insertion holes has a radially-inner insertion hole contour surface, a radially-outer insertion hole contour surface, and a pair of side-end insertion hole contour surfaces. The radially-outer magnet contour surface and the radially-outer insertion hole contour surface are each formed by a first arc surface. The radially-inner magnet contour surface and the radially-inner insertion hole contour surface are each formed by a second arc surface and at least one straight surface configured to suppress movement of the permanent magnet along the magnet insertion hole having an arc shape.Type: GrantFiled: August 26, 2014Date of Patent: June 26, 2018Assignee: Mitsubishi Electric CorporationInventors: Masahiro Nigo, Kazuchika Tsuchida, Kazuhiko Baba
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Patent number: 10008892Abstract: An IPM motor for a vacuum pump suitable for use as a motor for a small vacuum pump is provided. The IPM motor for a vacuum pump includes: a rotor core in which a rotor shaft of the vacuum pump is pressed and which also has magnets embedded therein; and a stator core which surrounds the rotor core and around which stator windings are wound. The magnets per pole embedded in the rotor core are each split into two pieces and inserted in respective magnet slots in the rotor core. A hole for stress concentration relaxation is provided at either end of each pair of magnet slots in which permanent magnets split into two pieces are embedded in each pole. The rotor core has a multilayer structure having a plurality of rotor core laminations stacked vertically in an axial direction of the rotor shaft. The rotor core laminations stacked vertically are positioned with a skew angle determined by using the holes for stress concentration relaxation.Type: GrantFiled: March 27, 2013Date of Patent: June 26, 2018Assignee: Edwards Japan LimitedInventors: Isao Nakagawa, Manabu Nonaka
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Patent number: 10003226Abstract: A motor includes a cylindrical stator having a hollow, and a rotor rotatably arranged inside the stator. The rotor includes a cylindrical rotor body, a permanent magnet group provided to the rotor body to generate a magnetic field, and a flux barrier group to interrupt magnetic flux. The rotor body, the permanent magnet group and the flux barrier group are asymmetrically formed with respect to a center of poles of the rotor.Type: GrantFiled: November 10, 2014Date of Patent: June 19, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sung Il Kim, Seong Taek Lim
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Patent number: 10003247Abstract: Provided is a linear actuator wherein a moving element can be moved in a direction normal to the direction of arrangement of coils. The moving element 1 has first to third magnets 6a-6c arranged in the X-direction. Each of the first to third magnets 6a-6c has N poles and S poles arranged in the ?-direction. The N poles and S poles of the second magnet 6b are shifted in the ?-direction relative to the N poles and S poles of the first magnet 6a. The N poles and S poles of the third magnet 6c are shifted in the ?-direction relative to the N poles and S poles of the second magnet 6b. A stator 2 has at least two salient poles 8a arranged in the ?-direction, and at least two coils 4a, 4b wound around the salient poles 8a.Type: GrantFiled: November 11, 2015Date of Patent: June 19, 2018Assignee: THK CO., LTD.Inventor: Junichiro Iwaki
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Patent number: 9991756Abstract: A stator for a motor of a compressor includes a stator core, insulator, coil, slot insulator, and inter-coil insulator. The stator core has a plurality of tooth portions arrayed circumferentially. The insulator is fitted to axial end faces of the stator core. The coil is wound on the tooth portions. The slot insulator is placed within slot portions that are spaces between circumferentially neighboring ones of the tooth portions, and which are interposed between the stator core and the coil. The inter-coil insulator is placed between circumferentially mutually neighboring windings of the coil. The inter-coil insulator is sheet shaped and folded over a width equal to double a sheet thickness at a folding-bottom portion extending along an axial direction. The folding-bottom portion is positioned on a distal end side of the tooth portions. Movement of the folding-bottom portion in a radial direction toward the rotor is restricted.Type: GrantFiled: November 24, 2015Date of Patent: June 5, 2018Assignee: Daikin Industries, Ltd.Inventors: Akinobu Ishizaki, Hidemi Tanji, Keiji Aota, Akio Mutou
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Patent number: 9985507Abstract: To provide a permanent magnet type motor having reduced torque ripple, in which torque ripples for electric angle sixth order and twelfth order are both reduced with a small skew angle. Driving is performed such that phases of currents flowing in two sets of three-phase armature windings 26-1 and 26-2 are different from each other by 20 degrees to 40 degrees in electric angle. A rotor 11 is composed of m stages of rotor component units arranged in the axial direction. The m stages of rotor component units are skewed to have a stage-skew structure such that a skew angle ? (unit: degree) between the adjacent units satisfies 26/m???43.2/m (m is an integer equal to or greater than 2) in electric angle.Type: GrantFiled: April 22, 2013Date of Patent: May 29, 2018Assignee: Mitsubishi Electric CorporationInventors: Masatsugu Nakano, Yu Hirotani, Satoru Akutsu, Toyoaki Udo, Yuji Takizawa
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Patent number: 9985505Abstract: A second core block is stacked on a first filler-vestige-accommodating steel sheet along a rotational axis and has a plurality of second magnet insertion holes. Each of the plurality of second magnet insertion holes is defined by a second inner wall. Each of a plurality of second permanent magnets is inserted into each of the plurality of second magnet insertion holes. Each of second spaces is provided between each of the plurality of second permanent magnets and the second inner wall. The filler fills the second spaces. The plurality of second magnet insertion holes have a plurality of second filler injection portions, respectively, via which the filler is injected into the plurality of second magnet insertion holes. The first filler-vestige-accommodating steel sheet has a plurality of first hole portions opposite to the plurality of second filler injection portions, respectively.Type: GrantFiled: April 20, 2016Date of Patent: May 29, 2018Assignee: HONDA MOTOR CO., LTD.Inventor: Satoshi Honjo
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Patent number: 9979249Abstract: A bus bar unit may include a bus bar; and a bus bar holder comprising a resin material and configured to hold the bus bar, wherein the bus bar includes a plurality of members comprising a metal. The plurality of members may include a bent member including a radial branch, a circumferential branch, and a bent portion between the radial branch and the circumferential branch. The radial branch may include a terminal portion provided at a second end portion. The circumferential branch may include a first connection portion provided at a second end. A connection portion may be configured by connecting the first connection portion and a second connection portion provided in a second one of the plurality of members, and at least a portion of the connection portion of the bus bar is held in the bus bar holder.Type: GrantFiled: September 25, 2014Date of Patent: May 22, 2018Assignee: NIDEC CORPORATIONInventor: Keisuke Fukunaga
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Patent number: 9979260Abstract: The invention relates to a method for liquid cooling of an electric motor of inner rotor type having a rotor of hub type and a stator provided with windings. The method includes supplying a cooling liquid for cooling to at least one end of the hub of the rotor, feeding supplied cooling liquid at least radially in the hub by means of the rotation of the hub, and by means of the rotation of the rotor throwing thus fed cooling liquid towards the stator. The invention also relates to a device and a platform to practice the method.Type: GrantFiled: October 24, 2013Date of Patent: May 22, 2018Assignee: BAE Systems Hägglunds AktiebolagInventors: Anders Söderholm, Viktor Lassila
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Patent number: 9979248Abstract: A permanent magnet (PM) machine includes a rotor and a stator assembly. The rotor includes a plurality of permanent magnets disposed about an axis of rotation. The stator assembly includes a stator body, a plurality of coil sides and a plurality of sintered iron magnetic wedges. The stator body includes a plurality of stator teeth defining a plurality of stator slots, each stator slot having an inside position and an outside position, such that each of the plurality of stator slots includes a first plurality of inside positions, and a first plurality of outside positions. The first plurality of coil sides are disposed in each of the first plurality of inside positions and the first plurality of outside positions. The first plurality of coil sides correspond to a first power phase. The first plurality of coil sides are electrically coupled to one another by a first plurality of end-coils.Type: GrantFiled: June 29, 2015Date of Patent: May 22, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Steven Joseph Galioto, Manoj Ramprasad Shah, Patel Bhageerath Reddy, Nathaniel Benedict Hawes