Patents by Inventor Kazuma Tsujikawa
Kazuma Tsujikawa 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: 11165291Abstract: A stator core support device according to an embodiment includes plural types of support members that support a stator core on a stator frame disposed radially outward. These support members are combined so as to form a closed circuit portion. Then, an insulating part for electrically insulating part of the closed circuit portion is provided.Type: GrantFiled: July 31, 2018Date of Patent: November 2, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Norio Takahashi, Masafumi Fujita, Takahiro Sato, Hideyuki Nakamura, Ken Nagakura, Kazuma Tsujikawa
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Patent number: 10601282Abstract: A gas cooled electric rotating machine is provided in which a cooling gas is flowed through into a rotor and a stator. The rotor includes a pair of center hole conductors inserted into a center hole along a center of rotation while being electrically insulated from a shaft and from each other, the center hole conductors including respective protruding parts protruding toward an end of the shaft. The rotor includes a pair of end conductors provided at the end of the shaft so as to be each electrically insulated from the shaft, the end conductors being electrically connected to side surfaces of the protruding parts of the pair of center hole conductors, the side surfaces serving as electric connection surfaces.Type: GrantFiled: April 24, 2017Date of Patent: March 24, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kenmei Shimanuki, Kazuma Tsujikawa, Hidetoshi Sugimura
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Publication number: 20190052134Abstract: A stator core support device according to an embodiment includes plural types of support members that support a stator core on a stator frame disposed radially outward. These support members are combined so as to form a closed circuit portion. Then, an insulating part for electrically insulating part of the closed circuit portion is provided.Type: ApplicationFiled: July 31, 2018Publication date: February 14, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Norio TAKAHASHI, Masafumi FUJITA, Takahiro SATO, Hideyuki NAKAMURA, Ken NAGAKURA, Kazuma TSUJIKAWA
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Patent number: 10186923Abstract: According to one embodiment, there is provided a 3-phase even-numbered-pole 2-layered armature winding housed in 45 slots per pole provided in a laminated iron core. The coil pieces corresponding to first, second, and third parallel circuits are placed in the first phase belt, and the coil pieces corresponding to fourth, fifth, and sixth parallel circuits are placed in the second phase belt. The upper coil pieces and the lower coil pieces of each parallel circuit are mutually placed in identical-numbered positions from a pole center.Type: GrantFiled: September 20, 2016Date of Patent: January 22, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Takashi Ueda, Masafumi Fujita, Tadashi Tokumasu, Kazuma Tsujikawa
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Patent number: 10177697Abstract: In one embodiment, an automatic voltage regulator includes a detection instruction unit configured to monitor a generator output voltage, and output an instruction signal when the output voltage of the generator 12 deviates from a predetermined range, the instruction signal being a signal of instructing detection of a specifying parameters generated in a generator field circuit of a generator excitation system; a field-parameter detection unit configured to detect the specifying parameters following to the instruction signal; and a comparison calculator configured to calculate a comparison value between the specifying parameters and a predetermined allowable upper-limit voltage-value of each component constituting the generator excitation system.Type: GrantFiled: October 19, 2017Date of Patent: January 8, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shinji Mukoyama, Masahiko Shibata, Daisuke Hiramatsu, Yoichi Uemura, Dai Nozaki, Kazuhiro Suzuki, Daisuke Iwashita, Kuniomi Niida, Kazuma Tsujikawa, Akira Okinaka, Yutaro Arai, Masataka Sato
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Patent number: 10128713Abstract: According to one embodiment, there is provided a 3-phase even-numbered-pole 2-layered armature winding housed in 45 slots per pole provided in a laminated iron core. In each coil piece group of each phase belt, the coil pieces of the second and fifth parallel circuits are placed in the second positions from the pole center among three positions of coil pieces in corresponding coil piece group. In six or four groups out of ten coil piece groups of each phase belt, coil pieces of the first or fourth parallel circuit are placed in the first position from the pole center. In first and second coil piece groups, coil pieces of the first or fourth parallel circuit are placed in different-numbered positions from the pole center.Type: GrantFiled: September 20, 2016Date of Patent: November 13, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Masafumi Fujita, Takashi Ueda, Tadashi Tokumasu, Kazuma Tsujikawa, Masanori Arata
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Publication number: 20180131303Abstract: In one embodiment, an automatic voltage regulator includes a detection instruction unit configured to monitor a generator output voltage, and output an instruction signal when the output voltage of the generator 12 deviates from a predetermined range, the instruction signal being a signal of instructing detection of a specifying parameters generated in a generator field circuit of a generator excitation system; a field-parameter detection unit configured to detect the specifying parameters following to the instruction signal; and a comparison calculator configured to calculate a comparison value between the specifying parameters and a predetermined allowable upper-limit voltage-value of each component constituting the generator excitation system.Type: ApplicationFiled: October 19, 2017Publication date: May 10, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shinji MUKOYAMA, Masahiko Shibata, Daisuke Hiramatsu, Yoichi Uemura, Dai Nozaki, Kazuhiro Suzuki, Daisuke Iwashita, Kuniomi Niida, Kazuma Tsujikawa, Akira Okinaka, Yutaro Arai, Masataka Sato
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Publication number: 20170310197Abstract: According to one embodiment, there is provided a gas cooled electric rotating machine in which a cooling gas is flowed through into a rotor and a stator. The rotor includes a pair of center hole conductors inserted into a center hole along a center of rotation while being electrically insulated from a shaft and from each other, the center hole conductors including respective protruding parts protruding toward an end of the shaft. The rotor includes a pair of end conductors provided at the end of the shaft so as to be each electrically insulated from the shaft, the end conductors being electrically connected to side surfaces of the protruding parts of the pair of center hole conductors, the side surfaces serving as electric connection surfaces.Type: ApplicationFiled: April 24, 2017Publication date: October 26, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenmei SHIMANUKI, Kazuma Tsujikawa, Hidetoshi Sugimura
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Patent number: 9774233Abstract: In one embodiment, a generator includes an alternating current exciter to output first, second and third alternating currents respectively having first, second and third phases, and a rotary rectifier to convert the first, second and third alternating currents into first, second and third direct currents, respectively. The generator further includes a rotating shaft on which the exciter and the rectifier are mounted, and plural conductors mounted on the shaft, and including one or more first conductors, one or more second conductors and one or more third conductors to respectively supply the first, second and third alternating currents from the exciter to the rectifier. The plural conductors include one or more conductor groups in each of which two or more conductors are collectively arranged, and each of the conductor groups includes the two or more conductors arranged to cancel a magnetic field around each conductor in the same group.Type: GrantFiled: July 8, 2014Date of Patent: September 26, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kenmei Shimanuki, Hidetoshi Sugimura, Toru Otaka, Daisuke Hiramatsu, Kazuma Tsujikawa, Wataru Nakamura, Kazuki Sato, Kunitomi Niida, Yutaro Arai, Keiichiro Kimura
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Patent number: 9722467Abstract: According to one embodiment, there is provided armature windings of a rotating electrical machine, in which a 3-phase winding of two layers including upper and lower layers is constituted of phase belts having an electrical phase difference of 60° in between, pairs of upper coil pieces and lower coil pieces are contained in slots, the number of slots per pole per phase includes a fractional number, and a denominator thereof is an integral number greater than or equal to 4, wherein coil arrangement is carried out such that at least one coil piece in either of the upper or lower coil pieces included in two layers of upper and lower layers in one phase belt is replaced with a coil piece of an adjacent different phase.Type: GrantFiled: May 9, 2014Date of Patent: August 1, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kadek Fendy Sutrisna, Hiroaki Ishizuka, Masashi Okubo, Toshiyuki Aso, Takashi Ueda, Kazuma Tsujikawa, Hideyuki Hachiya, Daisuke Hiramatsu, Toru Otaka
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Publication number: 20170093241Abstract: According to one embodiment, there is provided a 3-phase even-numbered-pole 2-layered armature winding housed in 45 slots per pole provided in a laminated iron core. In each coil piece group of each phase belt, the coil pieces of the second and fifth parallel circuits are placed in the second positions from the pole center among three positions of coil pieces in corresponding coil piece group. In six or four groups out of ten coil piece groups of each phase belt, coil pieces of the first or fourth parallel circuit are placed in the first position from the pole center. In first and second coil piece groups, coil pieces of the first or fourth parallel circuit are placed in different-numbered positions from the pole center.Type: ApplicationFiled: September 20, 2016Publication date: March 30, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Masafumi FUJITA, Takashi Ueda, Tadashi Tokumasu, Kazuma Tsujikawa, Masanori Arata
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Publication number: 20170093240Abstract: According to one embodiment, there is provided a 3-phase even-numbered-pole 2-layered armature winding housed in 45 slots per pole provided in a laminated iron core. The coil pieces corresponding to first, second, and third parallel circuits are placed in the first phase belt, and the coil pieces corresponding to fourth, fifth, and sixth parallel circuits are placed in the second phase belt. The upper coil pieces and the lower coil pieces of each parallel circuit are mutually placed in identical-numbered positions from a pole center.Type: ApplicationFiled: September 20, 2016Publication date: March 30, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Takashi UEDA, Masafumi FUJITA, Tadashi TOKUMASU, Kazuma TSUJIKAWA
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Publication number: 20150115780Abstract: In one embodiment, a generator includes an alternating current exciter to output first, second and third alternating currents respectively having first, second and third phases, and a rotary rectifier to convert the first, second and third alternating currents into first, second and third direct currents, respectively. The generator further includes a rotating shaft on which the exciter and the rectifier are mounted, and plural conductors mounted on the shaft, and including one or more first conductors, one or more second conductors and one or more third conductors to respectively supply the first, second and third alternating currents from the exciter to the rectifier. The plural conductors include one or more conductor groups in each of which two or more conductors are collectively arranged, and each of the conductor groups includes the two or more conductors arranged to cancel a magnetic field around each conductor in the same group.Type: ApplicationFiled: July 8, 2014Publication date: April 30, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenmei SHIMANUKI, Hidetoshi SUGIMURA, Toru OTAKA, Daisuke HIRAMATSU, Kazuma TSUJIKAWA, Wataru NAKAMURA, Kazuki SATO, Kunitomi NIIDA, Yutaro ARAI, Keiichiro KIMURA
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Publication number: 20140333170Abstract: According to one embodiment, there is provided armature windings of a rotating electrical machine, in which a 3-phase winding of two layers including upper and lower layers is constituted of phase belts having an electrical phase difference of 60° in between, pairs of upper coil pieces and lower coil pieces are contained in slots, the number of slots per pole per phase includes a fractional number, and a denominator thereof is an integral number greater than or equal to 4, wherein coil arrangement is carried out such that at least one coil piece in either of the upper or lower coil pieces included in two layers of upper and lower layers in one phase belt is replaced with a coil piece of an adjacent different phase.Type: ApplicationFiled: May 9, 2014Publication date: November 13, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kadek Fendy SUTRISNA, Hiroaki Ishizuka, Masashi Okubo, Toshiyuki Aso, Takashi Ueda, Kazuma Tsujikawa, Hideyuki Hachiya, Daisuke Hiramatsu, Toru Otaka