Patents by Inventor Masayuki Ikemoto
Masayuki Ikemoto 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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Publication number: 20240136871Abstract: A rotor used for a motor includes a rotor core, and a plurality of permanent magnets embedded in a corresponding plurality of embedding holes in the rotor core configured to include flux barriers at both ends of the plurality of embedding holes in the rotor core and to include a plurality of magnetic poles. The rotor core includes a plurality of grooves on an outer peripheral surface, the plurality of grooves, with the two paired grooves, are away from an axis that becomes the q-axis when the motor is operated, and are arranged symmetrically about the axis, and the rotor core has such a cross-section that a first angle between two lines passing through the two grooves and the center of the rotor core is smaller than a second angle between the axis-side end face of the two flux barriers adjacent to each other across the axis.Type: ApplicationFiled: February 15, 2022Publication date: April 25, 2024Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN CORPORTIONInventors: Ken JOZAKI, Toshinori OKOCHI, Yoshizumi KITAHARA, Takahiro ODAGI, Masayuki IKEMOTO
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Publication number: 20240039353Abstract: A rotor and a shaft hole is located at a position in a rotor shaft within a range in an axial direction in which a rotor core is located, and a weir portion, the shaft hole, and a cooling medium discharge hole are located in this order from one side in the axial direction.Type: ApplicationFiled: February 25, 2022Publication date: February 1, 2024Applicant: AISIN CORPORATIONInventors: Masayuki IKEMOTO, Takahiro TSUKAMOTO, Takahiro ODAGI
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Patent number: 11424651Abstract: A rotor that includes a shaft; a rotor core that is attached to the shaft and that is configured of a plurality of electric steel plates that are stacked; and a permanent magnet that is embedded in the rotor core, wherein: a coolant supply port that supplies a coolant to the rotor core is provided in the shaft, and at least two electric steel plates of the plurality of electric steel plates each include a first portion that has a first thickness in a rotational axis direction and a second portion that has a second thickness in the rotational axis direction, which is thinner than the first portion, the second portion extending in a radial direction and configuring a flow path through which the coolant supplied from the coolant supply port of the shaft flows.Type: GrantFiled: September 3, 2018Date of Patent: August 23, 2022Assignees: AISIN CORPORATION, AISIN SEIKI KABUSHIKI KAISHAInventors: Masayuki Ikemoto, Takefumi Komaki, Tsuyoshi Miyaji, Takamasa Takeuchi, Teppei Tsuda
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Patent number: 11296583Abstract: A core manufacturing that includes stacking a plurality of electromagnetic steel plates in an axial direction; performing first welding on an inner surface of a through hole formed in a stack of the electromagnetic steel plates and continuous in the axial direction, the first welding being performed toward a first side in the axial direction which is one side in the axial direction; and performing second welding on the inner surface of the through hole, the second welding being performed toward a second side in the axial direction which is the other side in the axial direction.Type: GrantFiled: February 13, 2018Date of Patent: April 5, 2022Assignee: AISIN CORPORATIONInventor: Masayuki Ikemoto
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Patent number: 11264878Abstract: A rotor for a rotary electric machine, wherein: magnet insertion holes are formed, each defined by the plurality of through holes communicating with each other in the axial direction across the plurality of magnetic sheets; and each of the permanent magnets is twisted about the center axis so as to be placed into a corresponding one of the magnet insertion holes, each having opposite ends in the axial direction that are shifted from each other by an angle corresponding to the constant angle, from outside in the axial direction.Type: GrantFiled: November 22, 2017Date of Patent: March 1, 2022Assignees: AISIN CORPORATION, AISIN SEIKI KABUSHIKI KAISHAInventors: Masayuki Ikemoto, Teppei Tsuda, Masafumi Sakuma
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Patent number: 11190070Abstract: A rotor for a rotating electrical machine, the rotor including: a rotor core having a plurality of magnetic poles; and a plurality of permanent magnets arranged in the rotor core, wherein: in each of the plurality of magnetic poles, the rotor core has a plurality of holes including a first hole and a second hole in each of which a respective permanent magnet of the plurality of permanent magnets having a planar magnetic pole surface is arranged.Type: GrantFiled: December 18, 2017Date of Patent: November 30, 2021Assignee: AISIN AW CO., LTD.Inventors: Naoto Saito, Masayuki Ikemoto, Tsuyoshi Miyaji
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Patent number: 11056939Abstract: A rotor that includes a permanent magnet; and a rotor core that has a magnet placement hole in which the permanent magnet is disposed, wherein the stress relaxation magnetic flux suppression hole is formed such that a total width of a minimum width of a first magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a first side in the longitudinal direction and the magnet placement hole and a minimum width of a second magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a second side in the longitudinal direction and the magnet placement hole is less than a total length of a length of the first magnetic flux passage in the longitudinal direction and a length of the second magnetic flux passage in the longitudinal direction.Type: GrantFiled: June 28, 2019Date of Patent: July 6, 2021Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyasu Sugiura, Masayuki Ikemoto, Naoto Saito, Suguru Gangi, Shinya Sano
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Patent number: 11005318Abstract: A rotor for a rotary electric machine, the rotor including: a rotor core; a rotor shaft having a tubular shape, passing through a radially inner side of the rotor core to be coupled to the rotor core, and extending along an axial direction; an oil supply path that supplies oil to the rotor shaft, a portion to be lubricated that is disposed on a first axial side with respect to the rotor core, wherein one side in the axial direction is defined as the first axial side and another side in the axial direction is defined as a second axial side; and a lubrication oil path through which oil is supplied to the portion to be lubricated.Type: GrantFiled: August 1, 2019Date of Patent: May 11, 2021Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Nakane, Takefumi Komaki, Masayuki Ikemoto, Yoshinari Nakagawa, Minoru Anai, Shinya Sano
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Patent number: 10998796Abstract: A structure for cooling a rotating electrical machine includes: an oil pump, a supply oil passage connected to a discharge port of the oil pump, and a first oil passage that is an oil passage located above a stator of the rotating electrical machine in a vertical direction and that has a supplied portion, a discharge hole, and a discharge portion. The supplied portion is connected to the supply oil passage. The discharge hole is formed on a first side in an axial direction, which is one side in the axial direction of the rotating electrical machine with respect to the supplied portion and is configured to discharge oil toward the stator. The discharge portion is formed on the first side with respect to the discharge hole. A second oil passage is formed inside a rotor shaft to which a rotor of the rotating electrical machine is fixed, and a third oil passage connects the discharge portion of the first oil passage and the second oil passage.Type: GrantFiled: July 17, 2019Date of Patent: May 4, 2021Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayuki Ikemoto, Takuya Komatsu, Takefumi Komaki, Hiroshi Kato, Satoshi Miyanaga, Yoshinari Nakagawa, Tomohito Ono, Hiroto Hashimoto, Takashi Matsumoto
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Patent number: 10868453Abstract: The rotor of the rotating electric machine includes the rotor shaft and the rotor core. The rotor shaft has the shaft refrigerant passage and the refrigerant supplying port on the outer peripheral surface of the rotor shaft, the shaft refrigerant passage extending in an axial direction, the refrigerant supplying port communicating with the shaft refrigerant passage. The rotor core has the rotor core refrigerant passage and the refrigerant receiving port on the inner peripheral surface of the rotor core, the rotor core refrigerant passage extending in the axial direction, the refrigerant receiving port communicating with the rotor core refrigerant passage and facing the refrigerant supplying port of the rotor shaft. A clearance groove part is provided at a portion that is on the inner peripheral surface of the rotor core and that faces the refrigerant supplying port of the rotor shaft, the clearance groove part extending in the axial direction.Type: GrantFiled: February 15, 2019Date of Patent: December 15, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Ken Noda, Shinya Sano, Hiroyuki Hattori, Masayuki Ikemoto
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Publication number: 20200259380Abstract: A rotor that includes a shaft; a rotor core that is attached to the shaft and that is configured of a plurality of electric steel plates that are stacked; and a permanent magnet that is embedded in the rotor core, wherein: a coolant supply port that supplies a coolant to the rotor core is provided in the shaft, and at least two electric steel plates of the plurality of electric steel plates each include a first portion that has a first thickness in a rotational axis direction and a second portion that has a second thickness in the rotational axis direction, which is thinner than the first portion, the second portion extending in a radial direction and configuring a flow path through which the coolant supplied from the coolant supply port of the shaft flows.Type: ApplicationFiled: September 3, 2018Publication date: August 13, 2020Applicants: AISIN AW CO., LTD., AISIN SEIKI KABUSHIKI KAISHAInventors: Masayuki IKEMOTO, Takefumi KOMAKI, Tsuyoshi MIYAJI, Takamasa TAKEUCHI, Teppei TSUDA
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Patent number: 10742085Abstract: The rotor of the rotating electric machine includes the rotor shaft and the rotor core. The rotor shaft has the shaft refrigerant passage and the refrigerant supplying port on the outer peripheral surface of the rotor shaft, the shaft refrigerant passage extending in an axial direction, the refrigerant supplying port communicating with the shaft refrigerant passage. The rotor core has the rotor core refrigerant passage and the refrigerant receiving port on the inner peripheral surface of the rotor core, the rotor core refrigerant passage extending in the axial direction, the refrigerant receiving port communicating with the rotor core refrigerant passage and facing the refrigerant supplying port of the rotor shaft. A clearance groove part is provided at a portion that is on the inner peripheral surface of the rotor core and that faces the refrigerant supplying port of the rotor shaft, the clearance groove part extending in the axial direction.Type: GrantFiled: February 15, 2019Date of Patent: August 11, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Ken Noda, Shinya Sano, Hiroyuki Hattori, Masayuki Ikemoto
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Publication number: 20200052534Abstract: A rotor for a rotary electric machine, the rotor including: a rotor core; a rotor shaft having a tubular shape, passing through a radially inner side of the rotor core to be coupled to the rotor core, and extending along an axial direction; an oil supply path that supplies oil to the rotor shaft, a portion to be lubricated that is disposed on a first axial side with respect to the rotor core, wherein one side in the axial direction is defined as the first axial side and another side in the axial direction is defined as a second axial side; and a lubrication oil path through which oil is supplied to the portion to be lubricated.Type: ApplicationFiled: August 1, 2019Publication date: February 13, 2020Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki NAKANE, Takefumi KOMAKI, Masayuki IKEMOTO, Yoshinari NAKAGAWA, Minoru ANAI, Shinya SANO
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Publication number: 20200028412Abstract: A structure for cooling a rotating electrical machine includes: an oil pump, a supply oil passage connected to a discharge port of the oil pump, and a first oil passage that is an oil passage located above a stator of the rotating electrical machine in a vertical direction and that has a supplied portion, a discharge hole, and a discharge portion. The supplied portion is connected to the supply oil passage. The discharge hole is formed on a first side in an axial direction, which is one side in the axial direction of the rotating electrical machine with respect to the supplied portion and is configured to discharge oil toward the stator. The discharge portion is formed on the first side with respect to the discharge hole. A second oil passage is formed inside a rotor shaft to which a rotor of the rotating electrical machine is fixed, and a third oil passage connects the discharge portion of the first oil passage and the second oil passage.Type: ApplicationFiled: July 17, 2019Publication date: January 23, 2020Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayuki IKEMOTO, Takuya KOMATSU, Takefumi KOMAKI, Hiroshi KATO, Satoshi MIYANAGA, Yoshinari NAKAGAWA, Tomohito ONO, Hiroto HASHIMOTO, Takashi MATSUMOTO
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Publication number: 20200021153Abstract: A rotor for a rotating electrical machine, the rotor including: a rotor core having a plurality of magnetic poles; and a plurality of permanent magnets arranged in the rotor core, wherein: in each of the plurality of magnetic poles, the rotor core has a plurality of holes including a first hole and a second hole in each of which a respective permanent magnet of the plurality of permanent magnets having a planar magnetic pole surface is arranged.Type: ApplicationFiled: December 18, 2017Publication date: January 16, 2020Applicant: AISIN AW CO., LTD.Inventors: Naoto SAITO, Masayuki IKEMOTO, Tsuyoshi MIYAJI
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Publication number: 20200014262Abstract: A rotor that includes a permanent magnet; and a rotor core that has a magnet placement hole in which the permanent magnet is disposed, wherein the stress relaxation magnetic flux suppression hole is formed such that a total width of a minimum width of a first magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a first side in the longitudinal direction and the magnet placement hole and a minimum width of a second magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a second side in the longitudinal direction and the magnet placement hole is less than a total length of a length of the first magnetic flux passage in the longitudinal direction and a length of the second magnetic flux passage in the longitudinal direction.Type: ApplicationFiled: June 28, 2019Publication date: January 9, 2020Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyasu SUGIURA, Masayuki IKEMOTO, Naoto SAITO, Suguru GANGI, Shinya SANO
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Publication number: 20200007012Abstract: A core manufacturing that includes stacking a plurality of electromagnetic steel plates in an axial direction; performing first welding on an inner surface of a through hole formed in a stack of the electromagnetic steel plates and continuous in the axial direction, the first welding being performed toward a first side in the axial direction which is one side in the axial direction; and performing second welding on the inner surface of the through hole, the second welding being performed toward a second side in the axial direction which is the other side in the axial direction.Type: ApplicationFiled: February 13, 2018Publication date: January 2, 2020Applicant: AISIN AW CO., LTD.Inventor: Masayuki IKEMOTO
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Publication number: 20190379247Abstract: A rotary electric machine that includes a rotor; and a permanent magnet, wherein: in an axially orthogonal section orthogonal to a rotational axis of the rotor in an attached state in which the permanent magnet is attached to the rotor, the permanent magnet has an uneven shape, in which both of two magnetic pole surfaces are repeatedly projected and recessed with a curvature that is larger than an average curvature of magnetic pole surfaces.Type: ApplicationFiled: November 30, 2017Publication date: December 12, 2019Applicants: AISIN AW CO., LTD., AISIN SEIKI KABUSHIKI KAISHAInventors: Masayuki IKEMOTO, Tsuyoshi MIYAJI, Teppei TSUDA
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Publication number: 20190260277Abstract: A rotor for a rotary electric machine, wherein: magnet insertion holes are formed, each defined by the plurality of through holes communicating with each other in the axial direction across the plurality of magnetic sheets; and each of the permanent magnets is twisted about the center axis so as to be placed into a corresponding one of the magnet insertion holes, each having opposite ends in the axial direction that are shifted from each other by an angle corresponding to the constant angle, from outside in the axial direction.Type: ApplicationFiled: November 22, 2017Publication date: August 22, 2019Applicants: AISIN AW CO., LTD., AISIN SEIKI KABUSHIKI KAISHAInventors: Masayuki IKEMOTO, Teppei TSUDA, Masafumi SAKUMA
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Publication number: 20190260248Abstract: The rotor of the rotating electric machine includes the rotor shaft and the rotor core. The rotor shaft has the shaft refrigerant passage and the refrigerant supplying port on the outer peripheral surface of the rotor shaft, the shaft refrigerant passage extending in an axial direction, the refrigerant supplying port communicating with the shaft refrigerant passage. The rotor core has the rotor core refrigerant passage and the refrigerant receiving port on the inner peripheral surface of the rotor core, the rotor core refrigerant passage extending in the axial direction, the refrigerant receiving port communicating with the rotor core refrigerant passage and facing the refrigerant supplying port of the rotor shaft. A clearance groove part is provided at a portion that is on the inner peripheral surface of the rotor core and that faces the refrigerant supplying port of the rotor shaft, the clearance groove part extending in the axial direction.Type: ApplicationFiled: February 15, 2019Publication date: August 22, 2019Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Ken Noda, Shinya Sano, Hiroyuki Hattori, Masayuki Ikemoto