Patents by Inventor Shoichiro Nishitani
Shoichiro Nishitani 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: 20210211009Abstract: A rotating electric machine to which the present invention is applied includes: a plurality of coils provided in a stator for respective phases; a plurality of bus bars having elasticity, which are provided for the respective phases and connected to the plurality of coils; and a holder including a plurality of insertion portions each having a groove shape formed to deform each of the plurality of bus bars.Type: ApplicationFiled: July 25, 2018Publication date: July 8, 2021Applicant: Mitsubishi Electric CorporationInventors: Yutaka IKURA, Fumitaka TOTSUKA, Shoichiro NISHITANI, Akifumi MIYAKE, Kohei KAWATA
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Patent number: 10938256Abstract: In a motor stator, terminal wires of a coil are led out respectively from a feed-side and a neutral-side coil end. With three circumferentially adjacent first-, second-, and third-phase coils as one set, the leading end portion and intermediate portion of one of three terminal wires led out from the neutral side are connected to each of the remaining terminal wires. A structure wherein the first- and second-phase terminal wires are connected together in one position, and the second- and third-phase terminal wires are connected together in a different position from the one position, is adopted, thus compacting the size of one wire connection portion.Type: GrantFiled: October 15, 2018Date of Patent: March 2, 2021Assignee: Mitsubishi Electric CorporationInventors: Kota Katsuragi, Shoichiro Nishitani, Shinichiro Yoshida, Ryuji Kitamura, Fumitaka Totsuka
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Patent number: 10666111Abstract: This invention is concerning a rotary electric machine 1, this electric motor 1 being provided with an inner cylinder 2, a rotor 3 provided so as to be rotatable inside the inner cylinder 2, a stator 4 fixed to the inner cylinder 2 and separated via a gap from an outer periphery of the rotor 3, and an outer cylinder 8 that covers an entire periphery of the inner cylinder 2 and forms a space 15, which serves as a coolant passage, in conjunction with the inner cylinder 2, wherein both ends of the inner cylinder 2 and the outer cylinder 8 in an axial direction are fixed to each other by cylinder welding portions 9 formed by welding. Accordingly, a rotary electric machine that is small and light can be obtained at low cost.Type: GrantFiled: April 27, 2015Date of Patent: May 26, 2020Assignee: Mitsubishi Electric CorporationInventors: Naoki Ohashi, Shoichiro Nishitani, Keisuke Murase, Akihiro Yamamura
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Publication number: 20190348873Abstract: In a motor stator, terminal wires of a coil are led out respectively from a feed-side and a neutral-side coil end. With three circumferentially adjacent first-, second-, and third-phase coils as one set, the leading end portion and intermediate portion of one of three terminal wires led out from the neutral side are connected to each of the remaining terminal wires. A structure wherein the first- and second-phase terminal wires are connected together in one position, and the second- and third-phase terminal wires are connected together in a different position from the one position, is adopted, thus compacting the size of one wire connection portion.Type: ApplicationFiled: October 15, 2018Publication date: November 14, 2019Applicant: Mitsubishi Electric CorporationInventors: Kota KATSURAGI, Shoichiro NISHITANI, Shinichiro YOSHIDA, Ryuji KITAMURA, Fumitaka TOTSUKA
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Publication number: 20180048207Abstract: This invention is concerning a rotary electric machine 1, this electric motor 1 being provided with an inner cylinder 2, a rotor 3 provided so as to be rotatable inside the inner cylinder 2, a stator 4 fixed to the inner cylinder 2 and separated via a gap from an outer periphery of the rotor 3, and an outer cylinder 8 that covers an entire periphery of the inner cylinder 2 and forms a space 15, which serves as a coolant passage, in conjunction with the inner cylinder 2, wherein both ends of the inner cylinder 2 and the outer cylinder 8 in an axial direction are fixed to each other by cylinder welding portions 9 formed by welding. Accordingly, a rotary electric machine that is small and light can be obtained at low cost.Type: ApplicationFiled: April 27, 2015Publication date: February 15, 2018Applicant: Mitsubishi Electric CorporationInventors: Naoki OHASHI, Shoichiro NISHITANI, Keisuke MURASE, Akihiro YAMAMURA
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Patent number: 8115362Abstract: An alternator can reduce the size of welding equipment and shorten the time of welding operation while ensuring high performance and high quality with the generation of electromagnetic noise being suppressed. The alternator includes a rotor having N poles and S poles alternately formed along a circumferential direction thereof, a stator core arranged so as to surround the rotor and having a plurality of axially extending slots formed at a predetermined pitch in the circumferential direction thereof, and a stator having a stator winding fitted into the slots. The stator core is formed by deforming by bending a hexahedral element iron core composed of iron core blocks with their adjacent ends being in abutment with each other and fusion bonded by welding. The weld portions of the blocks have a depth fusion extending at least up to a tensile region where a tensile stress of the stator core is generated.Type: GrantFiled: April 2, 2007Date of Patent: February 14, 2012Assignee: Mitsubishi Electric CorporationInventors: Shogo Okamoto, Kensaku Kuroki, Tetsuya Amasaki, Shoichiro Nishitani
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Patent number: 7893381Abstract: A welding set and a welding method that suppresses the unnecessary magnetization of a permanent magnet member by a welding current when welding one metal member including a permanent magnet member and the other metal member together are obtained. The welding set is provided with a work retaining part 3 that retains a work 14; a pressure device 4 located over the work retaining part 3 with a work-providing space interposed; a first welding electrode 8 mounted on a moving part 4a of the pressure device 4; a second welding electrode 10; and a welding transformer 11 that supplies a welding current to both of the welding electrodes 8, 10. Both of the welding electrodes 8, 10 are located on one end side of the work 14 with respect to one metal member and the other metal member respectively, as well as are located so that there is no permanent magnet member 18 between respective abutment terminal of one metal member and the other metal member.Type: GrantFiled: January 20, 2005Date of Patent: February 22, 2011Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Shoichiro Nishitani, Yasushi Nakatake, Masaharu Doi, Shinya Kudou, Kazuhiro Shono, Yoshihito Asao, Masaru Kuribayashi
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Patent number: 7847445Abstract: A rectifier of an alternator according to the present invention includes: a first heat sink; first unidirectional conducting element bodies that are disposed on a front surface of the first heat sink so as to be spaced apart; a second heat sink that is disposed so as to be separated from the first heat sink; second unidirectional conducting element bodies that are disposed on a front surface of the second heat sink so as to be spaced apart; and a circuit board that has a circuit board terminal by which the first unidirectional conducting element bodies and the second unidirectional conducting element bodies are connected so as to constitute a bridge circuit, and a terminal connection portion is configured by respectively connecting first terminals of the first unidirectional conducting element bodies and second terminals of the second unidirectional conducting element bodies adjacently in a common plane with the circuit board terminal.Type: GrantFiled: January 25, 2007Date of Patent: December 7, 2010Assignee: Mitsubishi Electric CorporationInventors: Shoichiro Nishitani, Atsushi Oohashi
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Publication number: 20100156206Abstract: A rectifier of an alternator according to the present invention includes: a first heat sink; first unidirectional conducting element bodies that are disposed on a front surface of the first heat sink so as to be spaced apart; a second heat sink that is disposed so as to be separated from the first heat sink; second unidirectional conducting element bodies that are disposed on a front surface of the second heat sink so as to be spaced apart; and a circuit board that has a circuit board terminal by which the first unidirectional conducting element bodies and the second unidirectional conducting element bodies are connected so as to constitute a bridge circuit, and a terminal connection portion is configured by respectively connecting first terminals of the first unidirectional conducting element bodies and second terminals of the second unidirectional conducting element bodies adjacently in a common plane with the circuit board terminal.Type: ApplicationFiled: January 25, 2007Publication date: June 24, 2010Applicant: Mitsubishi Electric CorporationInventors: Shoichiro Nishitani, Atsushi Oohashi
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Patent number: 7466048Abstract: First and second lead portions of an a-phase winding, a b-phase winding and a c-phase winding are each led out from a rear-end coil end group, and subsequently led around circumferentially along an apex portion of the rear-end coil end group so as to be separated from the apex portion. In addition, the first lead portions and the second lead portions are bent axially so as to contact each other closely and are joined together. The first lead portions are fastened by ties in a vicinity of the bent portion extending to the joined portion of the first lead portion, and the second lead portions are fastened by ties in a vicinity of a portion at which the first lead portion is led out from the rear-end coil end group.Type: GrantFiled: February 14, 2006Date of Patent: December 16, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shoichiro Nishitani, Wakaki Miyaji
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Publication number: 20080111443Abstract: An alternator can reduce the size of welding equipment and shorten the time of welding operation while ensuring high performance and high quality with the generation of electromagnetic noise being suppressed. The alternator includes a rotor having N poles and S poles alternately formed along a circumferential direction thereof, a stator core arranged so as to surround the rotor and having a plurality of axially extending slots formed at a predetermined pitch in the circumferential direction thereof, and a stator having a stator winding fitted into the slots. The stator core is formed by deforming by bending a hexahedral element iron core composed of iron core blocks with their adjacent ends being in abutment with each other and fusion bonded by welding. The weld portions of the blocks have a depth fusion extending at least up to a tensile region where a tensile stress of the stator core is generated.Type: ApplicationFiled: April 2, 2007Publication date: May 15, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shogo Okamoto, Kensaku Kuroki, Tetsuya Amasaki, Shoichiro Nishitani
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Patent number: 7265315Abstract: A method of joining terminals by soldering is provided which allows control of increasing gas supply even in soldering performed in a gas atmosphere within a gas chamber. Utilizing a springback phenomenon occurring at a flat portion of a terminal, a solder joint of the terminal is immersed in molten solder. Then, laser soldering is performed using a gas chamber made of a material which transmits a laser beam at least in part.Type: GrantFiled: October 14, 2004Date of Patent: September 4, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Atsushi Oohashi, Shoichiro Nishitani, Takahiro Yamada
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Publication number: 20070057590Abstract: First and second lead portions of an a-phase winding, a b-phase winding and a c-phase winding are each led out from a rear-end coil end group, and subsequently led around circumferentially along an apex portion of the rear-end coil end group so as to be separated from the apex portion. In addition, the first lead portions and the second lead portions are bent axially so as to contact each other closely and are joined together. The first lead portions are fastened by ties in a vicinity of the bent portion extending to the joined portion of the first lead portion, and the second lead portions are fastened by ties in a vicinity of a portion at which the first lead portion is led out from the rear-end coil end group.Type: ApplicationFiled: February 14, 2006Publication date: March 15, 2007Inventors: Shoichiro Nishitani, Wakaki Miyaji
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Publication number: 20070040458Abstract: A welding set and a welding method that suppresses the unnecessary magnetization of a permanent magnet member by a welding current when welding one metal member including a permanent magnet member and the other metal member together are obtained. The welding set is provided with a work retaining part 3 that retains a work 14; a pressure device 4 located over the work retaining part 3 with a work-providing space interposed; a first welding electrode 8 mounted on a moving part 4a of the pressure device 4; a second welding electrode 10; and a welding transformer 11 that supplies a welding current to both of the welding electrodes 8, 10. Both of the welding electrodes 8, 10 are located on one end side of the work 14 with respect to one metal member and the other metal member respectively, as well as are located so that there is no permanent magnet member 18 between respective abutment terminal of one metal member and the other metal member.Type: ApplicationFiled: January 20, 2005Publication date: February 22, 2007Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiko Fujita, Shoichiro Nishitani, Yasushi Nakatake, Masaharu Doi, Shinya Kudou, Kazuhiro Shono, Yoshihito Asao, Masaru Kuribayashi
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Publication number: 20050274704Abstract: A method of joining terminals by soldering is provided which allows control of increasing gas supply even in soldering performed in a gas atmosphere within a gas chamber. Utilizing a springback phenomenon occurring at a flat portion of a terminal, a solder joint of the terminal is immersed in molten solder. Then, laser soldering is performed using a gas chamber made of a material which transmits a laser beam at least in part.Type: ApplicationFiled: October 14, 2004Publication date: December 15, 2005Inventors: Atsushi Oohashi, Shoichiro Nishitani, Takahiro Yamada
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Patent number: 6879066Abstract: A linear motor comprises a stator including a stator yoke and a plurality of permanent magnets arranged side by side on the stator yoke along a motor running direction in alternately reversed directions to produce alternating polarities, and a moving part including a plurality of magnetic teeth arranged along the motor running direction and coils wound around the individual magnetic teeth. Cutouts formed in end surfaces of yoke portions of the individual magnetic teeth opposite to their side facing the stator line up to form a groove-shaped channel running through the yoke portions of the successive magnetic teeth, and the multiple magnetic teeth are joined together into a single structure by fitting a connecting bar in the groove-shaped channel.Type: GrantFiled: February 10, 2004Date of Patent: April 12, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Hashimoto, Yasuki Kimura, Yuji Nakahara, Akira Watarai, Shoichiro Nishitani
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Publication number: 20040155535Abstract: A linear motor comprises a stator including a stator yoke and a plurality of permanent magnets arranged side by side on the stator yoke along a motor running direction in alternately reversed directions to produce alternating polarities, and a moving part including a plurality of magnetic teeth arranged along the motor running direction and coils wound around the individual magnetic teeth. Cutouts formed in end surfaces of yoke portions of the individual magnetic teeth opposite to their side facing the stator line up to form a groove-shaped channel running through the yoke portions of the successive magnetic teeth, and the multiple magnetic teeth are joined together into a single structure by fitting a connecting bar in the groove-shaped channel.Type: ApplicationFiled: February 10, 2004Publication date: August 12, 2004Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Akira Hashimoto, Yasuki Kimura, Yuji Nakahara, Akira Watarai, Shoichiro Nishitani
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Patent number: 6747376Abstract: A linear motor comprises a stator including a stator yoke and a plurality of permanent magnets arranged side by side on the stator yoke along a motor running direction in alternately reversed directions to produce alternating polarities, and a moving part including a plurality of magnetic teeth arranged along the motor running direction and coils wound around the individual magnetic teeth. Cutouts formed in end surfaces of yoke portions of the individual magnetic teeth opposite to their side facing the stator line up to form a groove-shaped channel running through the yoke portions of the successive magnetic teeth, and the multiple magnetic teeth are joined together into a single structure by fitting a connecting bar in the groove-shaped channel.Type: GrantFiled: April 10, 2003Date of Patent: June 8, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Hashimoto, Yasuki Kimura, Yuji Nakahara, Akira Watarai, Shoichiro Nishitani
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Publication number: 20030197432Abstract: A linear motor comprises a stator including a stator yoke and a plurality of permanent magnets arranged side by side on the stator yoke along a motor running direction in alternately reversed directions to produce alternating polarities, and a moving part including a plurality of magnetic teeth arranged along the motor running direction and coils wound around the individual magnetic teeth. Cutouts formed in end surfaces of yoke portions of the individual magnetic teeth opposite to their side facing the stator line up to form a groove-shaped channel running through the yoke portions of the successive magnetic teeth, and the multiple magnetic teeth are joined together into a single structure by fitting a connecting bar in the groove-shaped channel.Type: ApplicationFiled: April 10, 2003Publication date: October 23, 2003Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Akira Hashimoto, Yasuki Kimura, Yuji Nakahara, Akira Watarai, Shoichiro Nishitani
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Patent number: 6501206Abstract: A stator of a dynamo-electric machine includes a cylindrical stator iron core having a plurality of slots arranged in a circumferential direction, and a stator winding composed of a plurality of conductor wires installed in the slots, the stator winding being formed by joining end portions of the plurality of conductor wires extending out of different ones of the slots at the end surface conductor sectional area of an end portion over a predetermined extent in a lengthwise direction from a distal end thereof is smaller than a conductor sectional area of a main portion, and an insulating film covers the main portion and a part of the end portion in the vicinity of the main portion, and a plurality of the conductor wires extending out of the different slots are joined with their end portions arranged properly.Type: GrantFiled: March 13, 2001Date of Patent: December 31, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Atsushi Oohashi, Shoichiro Nishitani, Yoshihiro Harada