Magnetic And Nonmagnetic Laminations Patents (Class 310/216.017)
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Patent number: 11557947Abstract: An electric machine includes a plurality of printed layers arranged to form a stator having an outer periphery and teeth extending radially inward from the outer periphery. Each of the printed layers includes discrete portions of metal and discrete portions of insulation. The discrete portions of insulation define a contiguous network of insulative boundaries separating discrete cells formed by the discrete portions of the metal. A volume of the discrete cells within the outer periphery is greater than a volume of the discrete cells within the teeth such that a reluctance of the teeth is greater than a reluctance of the outer periphery.Type: GrantFiled: October 10, 2019Date of Patent: January 17, 2023Assignee: Ford Global Technologies, LLCInventors: Franco Leonardi, Michael W. Degner
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Patent number: 10541577Abstract: An electric machine may include an adjacent pair of laminations each defining pockets having permanent magnets arranged therein to form magnetic poles. The laminations may be stacked in a pole-skewed fashion to form a portion of a rotor. A stator may surround the rotor. The machine may further include a separator lamination between the adjacent pair defining cutout portions having a shape based on a superposition of shapes of the pockets to increase a reluctance of leakage paths between the permanent magnets.Type: GrantFiled: January 13, 2016Date of Patent: January 21, 2020Assignee: Ford Global Technologies, LLCInventors: Franco Leonardi, Mark Allan Lippman, Michael W. Degner, Feng Liang
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Patent number: 10348173Abstract: A rotor has flux barrier groups. The number of flux barrier groups corresponds to the number of poles, and each of the flux barrier groups has a plurality of arc-shaped flux barriers. The plurality of flux barriers of each flux barrier group include arc-shaped portions formed in a polygonal region that is surrounded by a polygon having vertices at the midpoints in the circumferential direction of the flux barrier groups which are located on the outer peripheral edge of the rotor, as viewed in plan in the direction along a rotor shaft of the rotor. The center of the arcs of the arc-shaped portions of each flux barrier group is located at the midpoint in the circumferential direction of that flux barrier group which is located on the outer peripheral edge of the rotor.Type: GrantFiled: October 13, 2016Date of Patent: July 9, 2019Assignee: JTEKT CORPORATIONInventor: Mingyu Tong
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Patent number: 10256031Abstract: A low-profile coupled inductor includes a magnetic core and first and second windings. The magnetic core includes first and second end flanges, a winding form element, a first outer plate, and a first leakage post. The winding form element is disposed between and connects the first and second end flanges in a first direction. The first outer plate is disposed over and faces the first and second end flanges in a second direction. The first leakage post is disposed between the winding form element and the first outer plate in the second direction. The first winding is wound around the winding form element, between the first end flange and the first leakage post, and the second winding is wound around the winding form element, between the first leakage post and the second end flange. Each of the windings is wound around a common axis extending in the first direction.Type: GrantFiled: April 5, 2018Date of Patent: April 9, 2019Assignee: Maxim Integrated Products, Inc.Inventors: Michael Warren Baker, Jizheng Qiu, Brett A. Miwa, Alexandr Ikriannikov
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Patent number: 10236798Abstract: A vibration actuator includes a vibrator including an electromechanical transducer and an elastic body, a vibrator fixing member configured to hold the vibrator, a driven member configured to come into frictional contact with the vibrator so as to move relative to the vibrator, a pressing portion configured to press the vibrator against the driven member, a guide portion configured to guide the vibrator in a direction in which the vibrator moves, and a vibration damping member disposed between the vibrator fixing member and the movable plate. The guide portion includes a movable plate configured to move integrally with the vibrator, a rolling member configured to roll in the direction in which the vibrator moves, and a press-and-hold member configured to press the rolling member against the movable plate.Type: GrantFiled: November 18, 2014Date of Patent: March 19, 2019Assignee: Canon Kabushiki KaishaInventors: Atsushi Kimura, Harushige Yamamoto
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Patent number: 10069361Abstract: A rotor securing arrangement for directly or indirectly securing a rotor to a shaft. The rotor has at least one through hole along a axial direction of the rotor. A second hole diameter of the at least one through hole at either or both of axial ends of the rotor is greater than a first hole diameter of the at least one through hole at a portion other than the axial ends of the rotor. The rotor securing arrangement includes a first securing member corresponding to the first hole diameter of the at least one through hole, and a second securing member corresponding to the second hole diameter of the at least one through hole. The first securing member is configured to directly or indirectly secure the rotor to the shaft with at least a portion of the second securing member between the first securing member and the rotor.Type: GrantFiled: November 21, 2014Date of Patent: September 4, 2018Assignee: DENSO CORPORATIONInventors: Takeo Maekawa, Shin Kusase, Keiji Kondou
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Publication number: 20150084456Abstract: 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: ApplicationFiled: December 5, 2014Publication date: March 26, 2015Inventors: Yi Jia Chang, Rafael Maynez
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Patent number: 8564168Abstract: An electric machine includes a rotor lamination assembly having a lamination member formed from a material having a first yield strength. The lamination member includes a first bridge portion having a first width, and a first bridge zone having a first thickness. The rotor lamination assembly also includes at least one lamination section having a second bridge zone having a second thickness. The second thickness is greater than the first thickness. The rotor lamination assembly further includes at least one lamination element formed from a second material having a second yield strength that is higher than the first yield strength, and at least one lamination component. The at least one lamination component includes a second bridge portion having a second width. The second width is greater than the first width.Type: GrantFiled: May 24, 2010Date of Patent: October 22, 2013Assignee: Remy Technologies, L.L.C.Inventors: Bradley D. Chamberlin, Balazs Palfai
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Publication number: 20130076193Abstract: Disclosed herein is a laminated core used for a motor including an electric motor, wherein the core is formed of a soft magnetic composite and has a structure in which one or more unit laminates are laminated. Since the core is fabricated by laminating soft magnetic composites, the mechanical strength of the core formed of the soft magnetic composites can be improved.Type: ApplicationFiled: December 28, 2011Publication date: March 28, 2013Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Changsung Sean Kim, Guen Hong LEE, Han Kyung BAE, Chang Hwan CHOI, Ji Hye SHIM
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Publication number: 20110285241Abstract: An electric machine includes a rotor lamination assembly having a lamination member formed from a material having a first yield strength. The lamination member includes a first bridge portion having a first width, and a first bridge zone having a first thickness. The rotor lamination assembly also includes at least one lamination section having a second bridge zone having a second thickness. The second thickness is greater than the first thickness. The rotor lamination assembly further includes at least one lamination element formed from a second material having a second yield strength that is higher than the first yield strength, and at least one lamination component. The at least one lamination component includes a second bridge portion having a second width. The second width is greater than the first width.Type: ApplicationFiled: May 24, 2010Publication date: November 24, 2011Applicant: REMY TECHNOLOGIES, L.L.C.Inventors: Bradley D. Chamberlin, Balazs Palfai
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Patent number: 7851964Abstract: An electrical machine circuit element (1) comprises a flat metal sheet (2) provided with a plurality of slots (3) for an electric and/or cooling circuit. The elements (1) presents a plurality of clips (5) which project from the flat metal sheet (2) and a plurality of seats (7) to receive and retain clips (5) of other elements (1), in such a manner as to connect several elements together. Each clip (5) projects from one face of the metal sheet (2) and defines a seat (7) on the opposite face. The clips (5) present an edge (11) facing into the slots (3).Type: GrantFiled: December 11, 2008Date of Patent: December 14, 2010Assignee: Corrada S.p.A.Inventors: Massimo Negrello, Gianfranco Gardanini
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Patent number: 7719151Abstract: An active magnetic bearing (100) with autodetection of position, the bearing comprising at least first and second opposing electromagnets (120, 130) forming stators disposed on either side of a ferromagnetic body (110) forming a rotor and held without contact between said electromagnets. The first and second electromagnets (120, 130) each comprising a magnetic circuit (121; 131) essentially constituted by a first ferromagnetic material and co-operating with said ferromagnetic body to define an airgap, together with an excitation coil (122; 132) powered from a power amplifier whose input current is servo-controlled as a function of the position of the ferromagnetic body relative to the magnetic circuits of the first and second electromagnets.Type: GrantFiled: March 16, 2005Date of Patent: May 18, 2010Assignee: Societe de Mecanique MagnetiqueInventors: Yann Tremaudant, Maurice Brunet, Ulrich Schroeder
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Patent number: 7652404Abstract: A synchronous reluctance machine is provided. The synchronous reluctance machine includes a stator having a stator core, the stator core including a number of fractional-slot concentrated windings wound around multiple stator teeth. The synchronous reluctance machine also includes a rotor having a rotor core and disposed with an air gap inside and concentric with the stator, wherein the rotor core includes a number of laminated sheets, wherein each of the laminated sheets is axially skewed with respect to neighboring ones of the laminated sheets, and wherein each of the laminated sheets includes multiple ferromagnetic regions and multiple non-ferromagnetic regions formed of a single material.Type: GrantFiled: May 31, 2007Date of Patent: January 26, 2010Assignee: General Electric CompanyInventors: Ayman Mohamed Fawzi El-Refaie, John Michael Kern, Manoj Ramprasad Shah