Patents by Inventor Hisato Sumitomo
Hisato Sumitomo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11936244Abstract: A rotor includes a rotor core. The rotor core has an outer shape including a first arc portion provided so as to intersect a d-axis, a straight line portion provided so as to intersect a q-axis, and a curved portion that connects the first arc portion and the straight line portion. The first arc portion has an arc shape centered on an axial center of the rotor core. The curved portion includes an arc-shaped second arc portion that bulges outward in a radial direction of the rotor core. The radius of curvature of the second arc portion being smaller than a radius of curvature of the first arc portion.Type: GrantFiled: August 20, 2019Date of Patent: March 19, 2024Assignee: Daikin Industries, Ltd.Inventors: Kiyotaka Nishijima, Akinobu Ishizaki, Hisato Sumitomo, Takanori Hori
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Publication number: 20230228297Abstract: A thrust magnetic bearing includes a coil formed by winding a conductive wire, and a core that houses the coil. The core is provided with a refrigerant inlet and a refrigerant outlet. A refrigerant flow path connecting the refrigerant inlet and the refrigerant outlet is provided between the coil and the core. The refrigerant flow path is formed so that a refrigerant flowing from the refrigerant inlet to the refrigerant outlet mainly flows along the coil in a winding direction of the coil.Type: ApplicationFiled: March 28, 2023Publication date: July 20, 2023Inventors: Hisato SUMITOMO, Shouhei YAMASUSO, Yuji NAKAZAWA
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Publication number: 20220014058Abstract: A rotor includes a rotor core having a plurality of magnetic poles. At least one magnetic pole includes a first magnetic pole having three or more circumferentially arranged magnet holes, and a plurality of permanent magnets housed corresponding magnet holes. A portion of the rotor core between adjacent magnet holes has a radially extending region. A maximum radial dimension of each magnet hole is greater than a minimum radial dimension of a portion of the rotor core between a magnet hole radially outer surface and a rotor core outer peripheral surface. The first magnetic pole has a smaller amount of harmonic components in a radial flux density distribution on the rotor core outer peripheral surface, compared to a magnetic pole having a plurality of magnet holes arranged at equal circumferential intervals and a plurality of permanent magnets having substantially the same magnetic flux and number.Type: ApplicationFiled: September 23, 2021Publication date: January 13, 2022Inventors: Yusuke IRINO, Takaaki ONO, Yuji NAKAZAWA, Tatsuya TONARI, Hisato SUMITOMO, Masatsugu TAKEMOTO
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Publication number: 20220006344Abstract: A stator includes a cylindrical stator core provided with a plurality of slots, a segment conductor mounted to the stator core, and a resin insulator including a winding barrel portion and an insertion portion that are integrally molded. The segment conductor includes a plurality of leg portions inserted into the slots, and a crossover wire portion that couples two of the leg portions inserted into the slots that differ from each other. The winding barrel portion is disposed between the stator core and the crossover wire portion of the segment conductor. The insertion portion is disposed on an inner side from the segment conductor inside the slots of the stator core.Type: ApplicationFiled: September 21, 2021Publication date: January 6, 2022Inventors: Hisato SUMITOMO, Tatsuya TONARI, Yuji NAKAZAWA
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Publication number: 20210399597Abstract: An electric motor includes a stator, and a rotor having a plurality of magnetic poles. Each magnetic pole includes a rotor core having through holes arranged circumferentially side by side, and a permanent magnet inserted into each through hole. A length of a portion of the rotor core in a radial direction of the rotor is shorter than a length of the permanent magnet in the radial direction of the rotor. The length of the portion of the rotor core is measured between an inner surface of each of the through holes adjacent to an outer periphery of the rotor and an outer peripheral surface of the rotor. The permanent magnets generate a magnetic flux in a magnetic circuit showing a smaller magnetic resistance in a portion of the rotor radially outward of the permanent magnets than in a portion of the rotor radially inward of the permanent magnets.Type: ApplicationFiled: September 1, 2021Publication date: December 23, 2021Inventors: Tatsuya TONARI, Hisato SUMITOMO, Yuji NAKAZAWA, Taiichi NOSE, Hirofumi HIGASHI
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Publication number: 20210296951Abstract: A rotor includes a rotor core. The rotor core has an outer shape including a first arc portion provided so as to intersect a d-axis, a straight line portion provided so as to intersect a q-axis, and a curved portion that connects the first arc portion and the straight line portion. The first arc portion has an arc shape centered on an axial center of the rotor core. The curved portion includes an arc-shaped second arc portion that bulges outward in a radial direction of the rotor core. The radius of curvature of the second arc portion being smaller than a radius of curvature of the first arc portion.Type: ApplicationFiled: August 20, 2019Publication date: September 23, 2021Inventors: Kiyotaka NISHIJIMA, Akinobu ISHIZAKI, Hisato SUMITOMO, Takanori HORI
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Patent number: 10637306Abstract: A stator for a simultaneous concentrated winding motor includes a core having 3×m teeth, and 3×m windings. The windings include at least a U1 winding and a U2 winding that belong to a U phase, a V1 winding and a V2 winding that belong to a V phase, and a W1 winding and a W2 winding that belong to a W phase. First lead wires of the U1 winding, the V1 winding, and the W1 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged. First lead wires of the U2 winding, the V2 winding, and the W2 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged.Type: GrantFiled: September 26, 2016Date of Patent: April 28, 2020Assignee: Daikin Industries, Ltd.Inventors: Hisato Sumitomo, Kazuo Ida, Akinobu Ishizaki, Hidemi Tanji, Akio Mutou
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Publication number: 20180278101Abstract: A stator for a simultaneous concentrated winding motor includes a core having 3×m teeth, and 3×m windings. The windings include at least a U1 winding and a U2 winding that belong to a U phase, a V1 winding and a V2 winding that belong to a V phase, and a W1 winding and a W2 winding that belong to a W phase. First lead wires of the U1 winding, the V1 winding, and the W1 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged. First lead wires of the U2 winding, the V2 winding, and the W2 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged.Type: ApplicationFiled: September 26, 2016Publication date: September 27, 2018Applicant: Daikin Industries, Ltd.Inventors: Hisato SUMITOMO, Kazuo IDA, Akinobu ISHIZAKI, Hidemi TANJI, Akio MUTOU
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Publication number: 20140374173Abstract: The coil that is installed on a lever is obtained from a flat coil, which is wound flat so as to generate upper and lower winding regions that are parallel to the direction that the lever extends along a vertical surface that is parallel to the direction that the lever extends. The magnetic circuit is provided with multiple plate-shaped permanent magnets that face the upper and lower winding regions of the flat coil and are magnetized in a direction that is orthogonal to the vertical surface, and yoke members that induce lines of magnetic force of the permanent magnets so that a magnetic flux of an orientation that is orthogonal to the vertical surface is generated.Type: ApplicationFiled: February 26, 2013Publication date: December 25, 2014Applicant: SHINKO DENSHI CO., LTD.Inventors: Kazufumi Naito, Kouzou Terunuma, Kazushi Fujihara, Masaru Ikeshima, Shinichirou Ishida, Yoshiyuki Ishihara, Koji Fujiwara, Yasuhito Takahashi, Hisato Sumitomo