Patents by Inventor Yoshiki KUWAHARA
Yoshiki KUWAHARA 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: 20230283124Abstract: Provided is a rotor for a rotating electric machine, including: a rotation shaft member; a rotor core; a first end plate and a second end plate; and a first fixing member and a second fixing member. The first end plate is arranged between the rotor core and the first fixing member in the axial direction. The second end plate is arranged between the rotor core and the second fixing member in the axial direction. At least one of the first fixing member or the second fixing member includes an inner peripheral portion, and an outer peripheral portion provided on an outer side with respect to the inner peripheral portion in the radial direction. Rigidity of the outer peripheral portion is lower than rigidity of the inner peripheral portion. The outer peripheral portion is in contact with the first end plate or the second end plate.Type: ApplicationFiled: February 1, 2023Publication date: September 7, 2023Applicant: Mitsubishi Electric CorporationInventors: Seokho KIM, Yoshiki KUWAHARA, Satoru NAKADA, Yuki MICHIMUKO
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Patent number: 11485092Abstract: The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the insulation holder and the wire connection ring has contact with the joining component.Type: GrantFiled: November 27, 2019Date of Patent: November 1, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshiki Kuwahara, Ryuichi Kitora, Akihiro Yamamura, Shogo Okamoto, Masashi Nakamura, Shinichiro Yoshida
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Patent number: 11165302Abstract: A rotating electrical machine includes a rotor; a stator having a core annularly arranged facing the outer peripheral surface of the rotor, a coil wound around the core and having a coil end formed protruding from an end surface in the axial direction of the core, and an insulator formed on the end surface in the axial direction of the core and insulating the core and the coil; a bus bar arranged on the outer peripheral side of the coil end of the stator; and a terminal block installed on the outer peripheral side of the bus bar for introducing an electric current from an external power source to the stator, and the insulator has a groove portion in which the bus bar is held, and a terminal block housing portion in which the terminal block is held.Type: GrantFiled: November 11, 2016Date of Patent: November 2, 2021Assignee: Mitsubishi Electric CorporationInventors: Yoshiaki Kitta, Ken Nishikawa, Yoshiki Kuwahara, Fumitaka Totsuka, Yutaka Ikura, Koichi Ojima, Masaya Inoue
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Patent number: 11152828Abstract: A rotating electric machine includes a rotor, a stator, and a case, wherein each of the sub stator cores has a first insulated bobbin, a stator iron core, a second insulated bobbin, and a coil, and the coil is disposed in teeth parts of the first insulated bobbin, the stator iron core, and the second insulated bobbin, all of which are stacked in layers, and the first insulated bobbin has three ring holding parts which are formed in a core back part and extend to a circumferential direction, and the bus rings are separately inserted into the ring holding parts formed in the first insulated bobbin, and the first insulated bobbin, the stator iron core, and the second insulated bobbin each has a convex part formed at one side face of the core back part and a concave part formed at the other side face of the core back part.Type: GrantFiled: November 16, 2016Date of Patent: October 19, 2021Assignee: Mitsubishi Electric CorporationInventors: Yoshiki Kuwahara, Ryuji Kitamura, Yoshiaki Kitta, Fumitaka Totsuka, Koichi Ojima, Masaya Inoue
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Patent number: 11050317Abstract: It is realized that a shape of a bus ring is simplified, and a rotary electric machine is downsized. A coil connecting portion, which is protruded from bus ring maintaining portions to a shaft direction, is provided at a bus ring, and coil terminals are arranged in such a way that the coil terminals are protruded toward an outer side in a diameter direction with respect to the coil connecting portion, and the coil terminals and the coil connecting portion are connected by performing a resistance welding process. Thereby, it is not required that a slit and a bent portion or the like are formed at a tip of the bus ring, and a shape of the bus ring is simplified. Moreover, a welding board for a welding process and a chuck board for a connecting portion are not required, so that a rotary electric machine can be downsized.Type: GrantFiled: December 26, 2018Date of Patent: June 29, 2021Assignee: Mitsubishi Electric CorporationInventors: Fumitaka Totsuka, Yoshiki Kuwahara, Yoshiaki Kitta, Kohei Kawata
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Patent number: 10770944Abstract: A plurality of bus rings, which are arranged at bus ring maintaining portions, include coil connecting portions, which are protruded in an outer direction in a shaft direction of a stator core with respect to the bus ring maintaining portions, and terminals of coils of a stator are bent in an outer direction in a diameter direction of the stator core in a state where end surfaces of wall portions of bobbins are used as base points, and are connected to the coil connecting portions of the bus rings, and the end surfaces of the wall portions are protruded in an outer direction in a shaft direction of the stator core with respect to end surfaces of the bus rings, and are positioned in an inner direction in a shaft direction of the stator core with respect to end surfaces of the coil connecting portions of the bus rings.Type: GrantFiled: August 20, 2018Date of Patent: September 8, 2020Assignee: Mitsubishi Electric CorporationInventors: Fumitaka Totsuka, Yuki Yamamoto, Masaya Inoue, Yoshiki Kuwahara, Kota Katsuragi, Ryuji Kitamura
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Publication number: 20200212752Abstract: A rotating electrical machine includes a rotor; a stator having a core annularly arranged facing the outer peripheral surface of the rotor, a coil wound around the core and having a coil end formed protruding from an end surface in the axial direction of the core, and an insulator formed on the end surface in the axial direction of the core and insulating the core and the coil; a bus bar arranged on the outer peripheral side of the coil end of the stator; and a terminal block installed on the outer peripheral side of the bus bar for introducing an electric current from an external power source to the stator, and the insulator has a groove portion in which the bus bar is held, and a terminal block housing portion in which the terminal block is held.Type: ApplicationFiled: November 11, 2016Publication date: July 2, 2020Inventors: Yoshiaki KITTA, Ken NISHIKAWA, Yoshiki KUWAHARA, Fumitaka TOTSUKA, Yutaka IKURA, Koichi OJIMA, Masaya INOUE
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Publication number: 20200094486Abstract: The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the insulation holder and the wire connection ring has contact with the joining component.Type: ApplicationFiled: November 27, 2019Publication date: March 26, 2020Applicant: Mitsubishi Electric CorporationInventors: Yoshiki KUWAHARA, Ryuichi KITORA, Akihiro YAMAMURA, Shogo OKAMOTO, Masashi NAKAMURA, Shinichiro YOSHIDA
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Patent number: 10576690Abstract: The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the insulation holder and the wire connection ring has contact with the joining component.Type: GrantFiled: October 22, 2015Date of Patent: March 3, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshiki Kuwahara, Ryuichi Kitora, Akihiro Yamamura, Shogo Okamoto, Masashi Nakamura, Shinichiro Yoshida
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Publication number: 20190379253Abstract: It is realized that a shape of a bus ring is simplified, and a rotary electric machine is downsized. A coil connecting portion, which is protruded from bus ring maintaining portions to a shaft direction, is provided at a bus ring, and coil terminals are arranged in such a way that the coil terminals are protruded toward an outer side in a diameter direction with respect to the coil connecting portion, and the coil terminals and the coil connecting portion are connected by performing a resistance welding process. Thereby, it is not required that a slit and a bent portion or the like are formed at a tip of the bus ring, and a shape of the bus ring is simplified. Moreover, a welding board for a welding process and a chuck board for a connecting portion are not required, so that a rotary electric machine can be downsized.Type: ApplicationFiled: December 26, 2018Publication date: December 12, 2019Applicant: Mitsubishi Electric CorporationInventors: Fumitaka TOTSUKA, Yoshiki KUWAHARA, Yoshiaki KITTA, Kohei KAWATA
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Publication number: 20190356189Abstract: A plurality of bus rings, which are arranged at bus ring maintaining portions, include coil connecting portions, which are protruded in an outer direction in a shaft direction of a stator core with respect to the bus ring maintaining portions, and terminals of coils of a stator are bent in an outer direction in a diameter direction of the stator core in a state where end surfaces of wall portions of bobbins are used as base points, and are connected to the coil connecting portions of the bus rings, and the end surfaces of the wall portions are protruded in an outer direction in a shaft direction of the stator core with respect to end surfaces of the bus rings, and are positioned in an inner direction in a shaft direction of the stator core with respect to end surfaces of the coil connecting portions of the bus rings.Type: ApplicationFiled: August 20, 2018Publication date: November 21, 2019Applicant: Mitsubishi Electric CorporationInventors: Fumitaka TOTSUKA, Yuki YAMAMOTO, Masaya INOUE, Yoshiki KUWAHARA, Kota KATSURAGI, Ryuji KITAMURA
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Publication number: 20190260255Abstract: A rotating electric machine includes a rotor, a stator, and a case, wherein each of the sub stator cores has a first insulated bobbin, a stator iron core, a second insulated bobbin, and a coil, and the coil is disposed in teeth parts of the first insulated bobbin, the stator iron core, and the second insulated bobbin, all of which are stacked in layers, and the first insulated bobbin has three ring holding parts which are formed in a core back part and extend to a circumferential direction, and the bus rings are separately inserted into the ring holding parts formed in the first insulated bobbin, and the first insulated bobbin, the stator iron core, and the second insulated bobbin each has a convex part formed at one side face of the core back part and a concave part formed at the other side face of the core back part.Type: ApplicationFiled: November 16, 2016Publication date: August 22, 2019Applicant: Mitsubishi Electric CorporationInventors: Yoshiki KUWAHARA, Ryuji KITAMURA, Yoshiaki KITTA, Fumitaka TOTSUKA, Koichi OJIMA, Masaya INOUE
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Patent number: 10056799Abstract: A coil group 23G is composed of windings 23U to 23W for U phase, V phase, and W phase. One ends 23U1 to 23W1 of the windings for the respective phases composing the coil group 23G are connected to respective power supply bus bars 25U to 25W, and the other ends 23U2 and 23W2 of the windings for the phases positioned at both ends in the circumferential direction in the coil group 23G extend toward the other end 23V2 of the winding for the rest of the phases, whereby the other ends 23U2 to 23W2 of the windings for the respective phases are mutually connected.Type: GrantFiled: December 19, 2013Date of Patent: August 21, 2018Assignee: Mitsubishi Electric CorporationInventors: Shogo Okamoto, Ken Nishikawa, Masashi Nakamura, Akihiro Yamamura, Kota Hirohashi, Yoshiki Kuwahara
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Publication number: 20170217083Abstract: The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the Insulation holder and the wire connection ring has contact with the joining component.Type: ApplicationFiled: October 22, 2015Publication date: August 3, 2017Applicant: Mitsubishi Electric CorporationInventors: Yoshiki KUWAHARA, Ryuichi KITORA, Akihiro YAMAMURA, Shogo OKAMOTO, Masashi NAKAMURA, Shinichiro YOSHIDA
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Publication number: 20160190886Abstract: A coil group 23G is composed of windings 23U to 23W for U phase, V phase, and W phase. One ends 23U1 to 23W1 of the windings for the respective phases composing the coil group 23G are connected to respective power supply bus bars 25U to 25W, and the other ends 23U2 and 23W2 of the windings for the phases positioned at both ends in the circumferential direction in the coil group 23G extend toward the other end 23V2 of the winding for the rest of the phases, whereby the other ends 23U2 to 23W2 of the windings for the respective phases are mutually connected.Type: ApplicationFiled: December 19, 2013Publication date: June 30, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shogo OKAMOTO, Ken NISHIKAWA, Masashi NAKAMURA, Akihiro YAMAMURA, Kota HIROHASHI, Yoshiki KUWAHARA