Patents by Inventor Hajime UKAJI
Hajime UKAJI 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: 11979072Abstract: A magnetic geared motor includes a stator including a plurality of teeth that produce a magnetomotive force, a first rotor that rotates by the magnetomotive force of the stator, and a second rotor that, in response to rotation of the first rotor, rotates at a lower speed than the first rotor. The first rotor, the second rotor, and the stator are disposed coaxial to each other, and a plurality of magnets of different polarities are disposed in respective slot openings present between each two adjacent teeth.Type: GrantFiled: January 21, 2020Date of Patent: May 7, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hajime Ukaji, Noritaka Aso, Katsuhiro Hirata, Noboru Niguchi, Kazuaki Takahara, Hironori Suzuki, Tsubasa Kamigaki
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Patent number: 11929654Abstract: Inclined surfaces are formed in areas adjacent to a tooth protruding from the inner circumferential surface of the yoke, on both sides in a motor rotation circumferential direction, and the inclined surfaces are inclined or curved toward a protruding direction of the tooth as a distance from the tooth increases in the motor rotation circumferential direction. The conductive wire includes parts extending in the motor rotation circumferential direction on both sides of the tooth in the motor rotational shaft direction in each of first to n-th turns, and bent portions bending in a thickness direction of the conductive wire are formed in the parts so as to align in a winding axis direction through the width of the conductive wire. Portions of the conductive wire on are inclined toward the protruding direction of the associated tooth as the distance from the bent portion increases in the motor rotation circumferential direction.Type: GrantFiled: October 17, 2019Date of Patent: March 12, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hajime Ukaji, Mitsuoki Hishida
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Patent number: 11811282Abstract: A coil device includes a first coil including a plate-shaped first coil body having a first and second end. The first coil body is spirally wound on a columnar portion along the extending direction of the columnar portion such that the second end is positioned on one side in the extending direction relative to the first end. The coil device further includes a second coil including a plate-shaped second coil body having a third end and a fourth end. The second coil body is spirally wound on the columnar portion along the extending direction such that the third end is positioned on the one side in the extending direction relative to the second end of the first coil, and the fourth end is positioned on the one side in the extending direction relative to the third end. The second coil is in electrically parallel connection with the first coil.Type: GrantFiled: October 17, 2019Date of Patent: November 7, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hajime Ukaji, Mitsuoki Hishida, Kiyomi Kawamura, Toshiyuki Tamamura
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Publication number: 20230117552Abstract: A rotor includes: a rotor core including a plurality of first holes and a plurality of second holes; and a plurality of first permanent magnets arranged in the plurality of first holes, wherein the first holes and the second holes are provided radially around a rotating shaft, the rotor core in each of the plurality of second holes has a radial length smaller than a radial length of the rotor core in each of the plurality of first holes, each of the plurality of second holes is located closer to an inner side in the radial direction of the rotor core with respect to a first hole adjacent to the second hole in a circumferential direction of the rotor core among the plurality of first holes, and includes a protrusion protruding toward the first hole adjacent to the second hole in the circumferential direction of the rotor core.Type: ApplicationFiled: February 8, 2021Publication date: April 20, 2023Inventors: KENTA SUZUKI, EIKI MORIMOTO, HAJIME UKAJI, TOSHIYUKI TAMAMURA, NORITAKA ASO
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Publication number: 20220052596Abstract: A magnetic geared motor (1) includes a stator (30) including a plurality of teeth (31) that produce a magnetomotive force, a first rotor (10) that rotates by the magnetomotive force of the stator (30), and a second rotor (20) that, in response to rotation of the first rotor (10), rotates at a lower speed than the first rotor (10). The first rotor (10), the second rotor (20), and the stator (30) are disposed coaxial to each other, and a plurality of magnets (34) of different polarities are disposed in respective slot openings (31c) present between each two adjacent teeth (31).Type: ApplicationFiled: January 21, 2020Publication date: February 17, 2022Inventors: Hajime Ukaji, Noritaka ASO, Katsuhiro HIRATA, Noboru NIGUCHI, Kazuaki TAKAHARA, Hironori SUZUKI, Tsubasa KAMIGAKI
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Publication number: 20220014079Abstract: A magnetic geared motor includes a stator, a first inner rotor that is disposed to an inner side of the stator and rotates by a magnetomotive force of the stator, a first center rotor disposed between the stator and the first inner rotor, a second center rotor disposed to an inner side of the first inner rotor, and a second inner rotor disposed to an inner side of the second center rotor. The stator, the first center rotor, the first inner rotor, the second center rotor, and the second inner rotor are disposed coaxial to each other, and the first inner rotor includes first outer magnetic pole pairs disposed in a circumferential direction and a plurality of first inner magnetic pole pairs disposed in the circumferential direction.Type: ApplicationFiled: February 6, 2020Publication date: January 13, 2022Inventors: Hajime UKAJI, Noritaka ASO, Katsuhiro HIRATA, Noboru NIGUCHI, Kazuaki TAKAHARA, Hironori SUZUKI, Tsubasa KAMIGAKI
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Publication number: 20210344242Abstract: A coil device includes a first coil including a plate-shaped first coil body having a first and second end. The first coil body is spirally wound on a columnar portion along the extending direction of the columnar portion such that the second end is positioned on one side in the extending direction relative to the first end. The coil device further includes a second coil including a plate-shaped second coil body having a third end and a fourth end. The second coil body is spirally wound on the columnar portion along the extending direction such that the third end is positioned on the one side in the extending direction relative to the second end of the first coil, and the fourth end is positioned on the one side in the extending direction relative to the third end. The second coil is in electrically parallel connection with the first coil.Type: ApplicationFiled: October 17, 2019Publication date: November 4, 2021Inventors: Hajime UKAJI, Mitsuoki HISHIDA, Kiyomi KAWAMURA, Toshiyuki TAMAMURA
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Publication number: 20210344246Abstract: Inclined surfaces are formed in areas adjacent to a tooth protruding from the inner circumferential surface of the yoke, on both sides in a motor rotation circumferential direction, and the inclined surfaces are inclined or curved toward a protruding direction of the tooth as a distance from the tooth increases in the motor rotation circumferential direction. The conductive wire includes parts extending in the motor rotation circumferential direction on both sides of the tooth in the motor rotational shaft direction in each of first to n-th turns, and bent portions bending in a thickness direction of the conductive wire are formed in the parts so as to align in a winding axis direction through the width of the conductive wire. Portions of the conductive wire on are inclined toward the protruding direction of the associated tooth as the distance from the bent portion increases in the motor rotation circumferential direction.Type: ApplicationFiled: October 17, 2019Publication date: November 4, 2021Inventors: Hajime UKAJI, Mitsuoki HISHIDA
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Patent number: 10734875Abstract: A rotary electric machine includes a rotor that rotates around a rotation axis serving as a center and has a plurality of salient poles protruding in directions perpendicular to the rotation axis, and a stator that includes an annular structural body disposed radially outside the rotor and surrounding the rotor, and 6×n windings provided along a circumferential direction of the structural body, a field signal for generating field magnetic flux and a drive signal for driving the rotor as a three-phase rotary electric machine being superimposed on each other to be input to each of the windings. n is a natural number equal to or larger than one.Type: GrantFiled: June 2, 2015Date of Patent: August 4, 2020Assignee: OSAKA UNIVERSITYInventors: Katsuhiro Hirata, Noboru Niguchi, Yuki Ohno, Akira Kohara, Masayuki Katoh, Hajime Ukaji, Teiichirou Chiba
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Publication number: 20200161948Abstract: A rotary electric machine includes: a first rotor, a stator, and a second rotor that are coaxially disposed in stated order from radially centermost to radially outermost and spaced apart from one another, the stator including a plurality of pole pieces and a plurality of windings in a circumferential direction. The first rotor and the second rotor each include permanent magnets or electromagnets, the plurality of windings generate electromagnetic torque in the first rotor and the second rotor, the electromagnetic torque is magnetically transferred to the second rotor by rotation of the first rotor, or magnetically transferred to the first rotor by rotation of the second rotor, and in one of the first rotor and the second rotor, torque that is magnetically transferred from an other of the first rotor and the second rotor is superimposed on the electromagnetic torque.Type: ApplicationFiled: July 25, 2018Publication date: May 21, 2020Inventors: Hajime UKAJI, Yuichi YOSHIKAWA, Katsuhiro HIRATA, Noboru NIGUCHI
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Publication number: 20170093257Abstract: A rotary electric machine includes a rotor that rotates around a rotation axis serving as a center and has a plurality of salient poles protruding in directions perpendicular to the rotation axis, and a stator that includes an annular structural body disposed radially outside the rotor and surrounding the rotor, and 6×n windings provided along a circumferential direction of the structural body, a field signal for generating field magnetic flux and a drive signal for driving the rotor as a three-phase rotary electric machine being superimposed on each other to be input to each of the windings. n is a natural number equal to or larger than one.Type: ApplicationFiled: June 2, 2015Publication date: March 30, 2017Inventors: Katsuhiro HIRATA, Noboru NIGUCHI, Yuki OHNO, Akira KOHARA, Masayuki KATOH, Hajime UKAJI, Teiichirou CHIBA