Patents by Inventor Sho Yaegaki
Sho Yaegaki 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: 11695307Abstract: A rotor of a rotary electric machine includes a first magnet and a fourth magnet whose magnetic fields are oriented in radial directions of a stator, and a second magnet and a third magnet whose magnetic fields are oriented in circumferential directions of the stator. Teeth portions of the stator each include a base portion that protrudes in a radially inward direction of a yoke portion, a flange portion that is wider than the base portion, and an expanding portion interposed between the base portion and the flange portion. An angle of intersection between the base portion and the expanding portion is 108° to 130°. A distance (thickness) from an inner circumferential side end part to an outer circumferential side end part of the flange portion is 0.2 mm to 2.0 mm.Type: GrantFiled: September 23, 2021Date of Patent: July 4, 2023Assignee: HONDA MOTOR CO., LTD.Inventors: Manabu Yazaki, Shigeru Tajima, Shoei Abe, Yoshihisa Kubota, Sho Yaegaki
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Patent number: 11682934Abstract: A rotor of a rotary electric machine includes a first magnet and a fourth magnet whose magnetic fields are oriented in radial directions of a stator, and a second magnet and a third magnet whose magnetic fields are oriented in circumferential directions of the stator. In the stator, slots are formed between adjacent ones of teeth portions. An electromagnetic coil is provided in the slots. A distal end on an inner circumferential side of the electromagnetic coil is offset from an inner circumferential side end part of a base portion, which is a part of the teeth portion, toward a yoke portion.Type: GrantFiled: September 23, 2021Date of Patent: June 20, 2023Assignee: HONDA MOTOR CO., LTD.Inventors: Manabu Yazaki, Shigeru Tajima, Shoei Abe, Yoshihisa Kubota, Sho Yaegaki
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Patent number: 11682935Abstract: A first magnet, a second magnet, a fourth magnet, and a third magnet are retained on a rotor of a rotary electric machine in this order alongside one another in a circumferential direction. Magnetic fields of the first magnet and the fourth magnet are oriented in radial directions of a stator. Magnetic fields of the second magnet and the third magnet are oriented in circumferential directions of the stator. When the rotor is viewed in plan from above or below, a ratio of a total surface area of the first magnet and the fourth magnet to a total surface area of the second magnet and the third magnet is S14:S23=1:0.2 to 1:1.Type: GrantFiled: September 23, 2021Date of Patent: June 20, 2023Assignee: HONDA MOTOR CO., LTD.Inventors: Manabu Yazaki, Yoshihisa Kubota, Shoei Abe, Sho Yaegaki, Shigeru Tajima
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Publication number: 20220103032Abstract: A first magnet, a second magnet, a fourth magnet, and a third magnet are retained on a rotor of a rotary electric machine in this order alongside one another in a circumferential direction. Magnetic fields of the first magnet and the fourth magnet are oriented in radial directions of a stator. Magnetic fields of the second magnet and the third magnet are oriented in circumferential directions of the stator. When the rotor is viewed in plan from above or below, a ratio of a total surface area of the first magnet and the fourth magnet to a total surface area of the second magnet and the third magnet is S14:S23=1:0.2 to 1:1.Type: ApplicationFiled: September 23, 2021Publication date: March 31, 2022Inventors: Manabu Yazaki, Yoshihisa Kubota, Shoei Abe, Sho Yaegaki, Shigeru Tajima
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Publication number: 20220103033Abstract: A rotor of a rotary electric machine includes a first magnet and a fourth magnet whose magnetic fields are oriented in radial directions of a stator, and a second magnet and a third magnet whose magnetic fields are oriented in circumferential directions of the stator. Teeth portions of the stator each include a base portion that protrudes in a radially inward direction of a yoke portion, a flange portion that is wider than the base portion, and an expanding portion interposed between the base portion and the flange portion. An angle of intersection between the base portion and the expanding portion is 108° to 130°. A distance (thickness) from an inner circumferential side end part to an outer circumferential side end part of the flange portion is 0.2 mm to 2.0 mm.Type: ApplicationFiled: September 23, 2021Publication date: March 31, 2022Inventors: Manabu Yazaki, Shigeru Tajima, Shoei Abe, Yoshihisa Kubota, Sho Yaegaki
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Publication number: 20220103031Abstract: A rotor of a rotary electric machine includes a first magnet and a fourth magnet whose magnetic fields are oriented in radial directions of a stator, and a second magnet and a third magnet whose magnetic fields are oriented in circumferential directions of the stator. In the stator, slots are formed between adjacent ones of teeth portions. An electromagnetic coil is provided in the slots. A distal end on an inner circumferential side of the electromagnetic coil is offset from an inner circumferential side end part of a base portion, which is a part of the teeth portion, toward a yoke portion.Type: ApplicationFiled: September 23, 2021Publication date: March 31, 2022Inventors: Manabu Yazaki, Shigeru Tajima, Shoei Abe, Yoshihisa Kubota, Sho Yaegaki
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Patent number: 11050353Abstract: A power conversion device capable of suppressing current backflow while also improving current responsiveness and power conversion efficiency is achieved. A snubber capacitor capable of absorbing switching surge is connected to a low-voltage side switching circuit that includes switching elements. Until a predetermined time elapses from when a request to start switching is received, a controller determines that the snubber capacitor has not reached full charge or near-full charge, and asynchronously controls the low-voltage side switching circuit and a high-voltage side switching circuit that includes switching elements.Type: GrantFiled: April 11, 2018Date of Patent: June 29, 2021Assignee: Hitachi Automotive Systems, Ltd.Inventors: Sho Yaegaki, Kenji Kubo, Takuma Ono, Yuki Yamabe
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Publication number: 20210083588Abstract: A power conversion device capable of suppressing current backflow while also improving current responsiveness and power conversion efficiency is achieved. A snubber capacitor capable of absorbing switching surge is connected to a low-voltage side switching circuit that includes switching elements. Until a predetermined time elapses from when a request to start switching is received, a controller determines that the snubber capacitor has not reached full charge or near-full charge, and asynchronously controls the low-voltage side switching circuit and a high-voltage side switching circuit that includes switching elements.Type: ApplicationFiled: April 11, 2018Publication date: March 18, 2021Inventors: Sho YAEGAKI, Kenji KUBO, Takuma ONO, Yuki YAMABE
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Patent number: 9950627Abstract: An object is to reduce a discharging time required for discharging residual charges of a capacitor.Type: GrantFiled: October 14, 2014Date of Patent: April 24, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Sho Yaegaki, Hiroshi Tamura, Takeshi Matsuo, Hiroyuki Yamada, Nobuhiro Akasaka
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Patent number: 9906164Abstract: A surge according to a change of a switching state can be reduced without increasing a torque ripple of a motor. A first switching signal to control switching of a boost converter is generated on the basis of a comparison of a first duty command value and a first triangular wave carrier of the boost converter. A second switching signal to control switching of an inverter is generated on the basis of a comparison of a second duty command value and a second triangular wave carrier of the inverter. In addition, the second triangular wave carrier is generated such that a frequency of the second triangular wave carrier becomes equal to a frequency of the first triangular wave carrier and a phase of the second triangular wave carrier is different from a phase of the first triangular wave carrier by 180 degrees.Type: GrantFiled: December 8, 2014Date of Patent: February 27, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroshi Tamura, Takeshi Matsuo, Hiroyuki Yamada, Nobuhiro Akasaka, Sho Yaegaki
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Publication number: 20170005591Abstract: A surge according to a change of a switching state can be reduced without increasing a torque ripple of a motor. A first switching signal to control switching of a boost converter is generated on the basis of a comparison of a first duty command value and a first triangular wave carrier of the boost converter. A second switching signal to control switching of an inverter is generated on the basis of a comparison of a second duty command value and a second triangular wave carrier of the inverter. In addition, the second triangular wave carrier is generated such that a frequency of the second triangular wave carrier becomes equal to a frequency of the first triangular wave carrier and a phase of the second triangular wave carrier is different from a phase of the first triangular wave carrier by 180 degrees.Type: ApplicationFiled: December 8, 2014Publication date: January 5, 2017Applicant: Hitachi Automotive Systems, Ltd.Inventors: Hiroshi TAMURA, Takeshi MATSUO, Hiroyuki YAMADA, Nobuhiro AKASAKA, Sho YAEGAKI
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Publication number: 20160280076Abstract: An object is to reduce a discharging time required for discharging residual charges of a capacitor.Type: ApplicationFiled: October 14, 2014Publication date: September 29, 2016Inventors: Sho YAEGAKI, Hiroshi TAMURA, Takeshi MATSUO, Hiroyuki YAMADA, Nobuhiro AKASAKA
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Publication number: 20140210262Abstract: A vehicle drive device includes an electric motor; a first electrical storage device that is of a high-voltage type and supplies an electric power to the electric motor; a plurality of auxiliary machines; a second electrical storage device that is of a low-voltage type and supplies an electric power to the plurality of auxiliary machines; and a vehicle control device. The first electrical storage device can supply an electric power to the second electrical storage device. The vehicle control device determines whether a degree of degradation of the first electrical storage device can be determined, selects a auxiliary machine from the plurality of auxiliary machines, and drives the selected auxiliary machine to estimate the degree of degradation of the first electrical storage device when it is judged that the degree of degradation of the first electrical storage device can be determined.Type: ApplicationFiled: July 25, 2012Publication date: July 31, 2014Applicant: Hitachi Automotive Systems, Ltd.Inventors: Sho Yaegaki, Hiroyuki Yamada