Patents by Inventor Motoo KITAHARA
Motoo KITAHARA 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: 20240204623Abstract: A rotating electrical machine includes a coil wound in a distributed square wire manner, a stator core forming a slot that stores the coil, a temperature sensor that detects a temperature of the coil, and a housing that houses the stator core. The temperature sensor includes a support member that supports the temperature sensor by being connected and fixed to the housing, and the support member includes a communication portion communicating with a coil space formed by the stator core and adjacent coils among coils housed in slots.Type: ApplicationFiled: February 2, 2022Publication date: June 20, 2024Applicant: HITACHI ASTEMO, LTD.Inventors: Takayuki NITTA, Yasuyuki SAITO, Motoo KITAHARA, Tomoyuki NAKADE
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Patent number: 11496016Abstract: Provided is a rotor capable of improving the reliability of a connection between a lead conductor and a terminal member. A stator includes a winding wound around a stator core and having a lead conductor at an end thereof, and a terminal member having a connection portion to the lead conductor of the winding. The connection portion of the terminal member includes a winding-side connection portion that fixes the lead conductor, and a leading-end-side connection portion that fixes a portion closer to a leading end of the lead conductor than the winding-side connection portion.Type: GrantFiled: November 25, 2016Date of Patent: November 8, 2022Assignee: Hitachi Astemo, Ltd.Inventors: Tomohiro Fukuda, Kenichi Nakayama, Motoo Kitahara, Kazuo Ojima
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Patent number: 11387719Abstract: An object of the present invention is to suppress reduction of insulation reliability between stator coils. A method of manufacturing a rotary electric machine according to the present invention is a method of manufacturing a stator including an insulating member intervening between a plurality of coil end portions each protruding from a stator core, the method including: a first step of disposing an interposed member to cover part of the insulating member between the plurality of coil end portions; and a second step of welding part of each of the plurality of coil end portions.Type: GrantFiled: October 24, 2017Date of Patent: July 12, 2022Assignee: HITACHI ASTEMO, LTD.Inventors: Yuki Arai, Motoo Kitahara
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Patent number: 10666102Abstract: An electric machine capable of easily and efficiently assembling a rotor core to a rotating shaft is provided. A rotor core is formed by laminating a first steel plate consisting of one or more electromagnetic steel plates having a first protrusion portion to be accommodated in a groove portion of a rotating shaft and a second steel plate consisting of one or more electromagnetic steel plates having a second protrusion portion to be accommodated in the groove portion of the rotating shaft. The first protrusion portion of the first steel plate has a first engaging portion deformed by a side surface of the groove portion of the rotating shaft. At least a part of the first engaging portion of the first steel plate is disposed in a space formed between a second protrusion portion of the second steel plate and the side surface of a groove portion of the rotating shaft.Type: GrantFiled: July 19, 2017Date of Patent: May 26, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiromitsu Okamoto, Shinji Yamazaki, Yuichiro Baba, Ryoji Kobayashi, Motoo Kitahara, Yuki Arai
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Publication number: 20200014260Abstract: In a rotor, a permanent magnet 300 is an angulated pillar member of which the cross section perpendicular to the rotor shaft center is rectangular, and includes two pairs of facing side surfaces 310 to 340 which extend along the rotor shaft center, and the paired-up side surfaces 310 and 320 are provided such that one side surface is provided on a side near the rotor shaft center and the other one is provided on the outer peripheral side of the rotor. In the magnet storage slot 200A, a protruding portion 210 is provided which protrudes from an inner peripheral surface of the slot and abuts on a side surface 310 on a side near the rotor shaft center of any pair of side surfaces 310 and 320 in the two pairs.Type: ApplicationFiled: January 29, 2018Publication date: January 9, 2020Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yuki ARAI, Shinji YAMAZAKI, Motoo KITAHARA
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Publication number: 20190312493Abstract: An object of the present invention is to suppress reduction of insulation reliability between stator coils. A method of manufacturing a rotary electric machine according to the present invention is a method of manufacturing a stator including an insulating member intervening between a plurality of coil end portions each protruding from a stator core, the method including: a first step of disposing an interposed member to cover part of the insulating member between the plurality of coil end portions; and a second step of welding part of each of the plurality of coil end portions.Type: ApplicationFiled: October 24, 2017Publication date: October 10, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yuki ARAI, Motoo KITAHARA
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Publication number: 20190252936Abstract: An electric machine capable of easily and efficiently assembling a rotor core to a rotating shaft is provided. A rotor core is formed by laminating a first steel plate consisting of one or more electromagnetic steel plates having a first protrusion portion to be accommodated in a groove portion of a rotating shaft and a second steel plate consisting of one or more electromagnetic steel plates having a second protrusion portion to be accommodated in the groove portion of the rotating shaft. The first protrusion portion of the first steel plate has a first engaging portion deformed by a side surface of the groove portion of the rotating shaft. At least a part of the first engaging portion of the first steel plate is disposed in a space formed between a second protrusion portion of the second steel plate and the side surface of a groove portion of the rotating shaft.Type: ApplicationFiled: July 19, 2017Publication date: August 15, 2019Inventors: Hiromitsu OKAMOTO, Shinji YAMAZAKI, Yuichiro BABA, Ryoji KOBAYASHI, Motoo KITAHARA, Yuki ARAI
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Publication number: 20190006904Abstract: Provided is a rotor capable of improving the reliability of a connection between a lead conductor and a terminal member. A stator includes a winding wound around a stator core and having a lead conductor at an end thereof, and a terminal member having a connection portion to the lead conductor of the winding. The connection portion of the terminal member includes a winding-side connection portion that fixes the lead conductor, and a leading-end-side connection portion that fixes a portion closer to a leading end of the lead conductor than the winding-side connection portion.Type: ApplicationFiled: November 25, 2016Publication date: January 3, 2019Inventors: Tomohiro FUKUDA, Kenichi NAKAYAMA, Motoo KITAHARA, Kazuo OJIMA
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Patent number: 10153672Abstract: A rotating electric machine, which can achieve improvement of a reluctance torque, reduction of stress and improvement of a power factor at the same time, and can also realize high output, and an electrically driven vehicle having the rotating electric machine are provided. A permanent magnet is arranged on a q-axis that connects magnetic poles of a rotor; a gap is formed in a radial direction of the permanent magnet; another permanent magnet is arranged facing the said permanent magnet so that these permanent magnets may sandwich a d-axis which connects centers of the magnetic poles; and another gap is formed at a position corresponding to a position of the said gap.Type: GrantFiled: October 20, 2014Date of Patent: December 11, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yasuyuki Saito, Yuji Kanoh, Tomohiro Adachi, Motoo Kitahara, Tomohiro Fukuda
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Publication number: 20180248453Abstract: A rotor with high productivity, a rotating electric machine including the rotor, and a method of manufacturing the rotor are provided. A rotor of a rotating electric machine includes a permanent magnet and a rotor core having a magnet insertion hole, the permanent magnet being inserted into the magnet insertion hole. The void between the permanent magnet and the magnet insertion hole is filled with a thermosetting powdered resin. A method of manufacturing the rotor of the rotating electric machine includes: a first step of inserting the permanent magnet and the thermosetting powdered resin into the magnet insertion hole; a second step of thermally hardening the powdered resin while rotating the rotor core; and a third step of magnetizing the permanent magnet.Type: ApplicationFiled: July 28, 2016Publication date: August 30, 2018Inventors: Kenichi NAKAYAMA, Shinji YAMAZAKI, Tomohiro FUKUDA, Motoo KITAHARA
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Publication number: 20160301271Abstract: A rotating electric machine, which can achieve improvement of a reluctance torque, reduction of stress and improvement of a power factor at the same time, and can also realize high output, and an electrically driven vehicle having the rotating electric machine are provided. A permanent magnet is arranged on a q-axis that connects magnetic poles of a rotor; a gap is formed in a radial direction of the permanent magnet; another permanent magnet is arranged facing the said permanent magnet so that these permanent magnets may sandwich a d-axis which connects centers of the magnetic poles; and another gap is formed at a position corresponding to a position of the said gap.Type: ApplicationFiled: October 20, 2014Publication date: October 13, 2016Applicant: Hitachi Automotive Systems, Ltd.Inventors: Yasuyuki SAITO, Yuji KANOH, Tomohiro ADACHI, Motoo KITAHARA, Tomohiro FUKUDA