Patents by Inventor Mikio Kakiuchi
Mikio Kakiuchi 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: 20110074241Abstract: According to one embodiment, there is provided a rotating electrical machine including a core, a coil extending from the core, and an electromagnetic shield which is provided outside the core, and has a plurality of shoulders projecting toward the coil. The coil includes an insulator covering outside of a conductor, a resistance layer formed on a surface of the insulator and contacting the core, and at least one potential grading layer formed on a surface of the insulator adjacent to the resistance layer. A boundary between the resistance layer and potential grading layer is provided at a position farther from the core than a point on a surface of the coil, where a distance between the coil and a shoulder of the electromagnetic shield closest to the core is the shortest.Type: ApplicationFiled: September 28, 2010Publication date: March 31, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takashi Harakawa, Tetsushi Okamoto, Yoshiyuki Inoue, Tooru Ootaka, Hiroshi Hatano, Mikio Kakiuchi, Toshihiko Shinoda, Makoto Kawahara, Masashi Kobayashi, Wataru Nakamura, Ken Nagakura, Masamitsu Sakuma
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Patent number: 7893575Abstract: The depth from the open end of a rotor slot closest to a magnetic pole of a rotary core to a slot bottom or the bottom of a subslot provided as a coolant ventilation path on a rotor slot bottom is made less than the depth of slots at and after a second slot counted from the magnetic pole side in the direction of internal circumference, and when a shortest distance between the bottoms of the rotor slots opposed to each other through a magnetic pole or a shortest distance between the bottoms of the subslots is assumed to be a magnetic pole width of the slots, a magnetic pole width Wp1 of a slot closest to the magnetic pole side is set to 85% or more of a magnetic pole width Wp2 of a second slot counted from the magnetic pole side in the direction of internal circumference.Type: GrantFiled: May 27, 2008Date of Patent: February 22, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Mikio Kakiuchi, Masanori Arata, Takashi Ueda
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Patent number: 7863794Abstract: There is provided a 3-phase 2-layer armature winding of a rotating electrical machine. The lead-out connection conductor connected to the output terminal is connected to a coil piece positioned at least farther than a first coil piece inside the phase belt counted from the end of the each phase belt, and a coil piece positioned at the end of the phase belt is connected to a coil piece positioned at least farther than the n-th (n is an integer larger than 1) inside the phase belt counted from the other end of the phase belt in the same parallel circuit, by a jumper wire.Type: GrantFiled: July 12, 2010Date of Patent: January 4, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi, Hiroshi Hatano, Takashi Ueda, Ken Nagakura
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Patent number: 7834508Abstract: In an armature, the upper and lower coil pieces in the first and third parallel circuits are located at the 1st, 4th, 6th, 7th, 10th and 12th positions, and the upper and lower coil pieces in the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 8th, 9th and 11th positions, when relative positions of the upper and lower coil pieces in one of the first and second phase belts are indicated by positions counted in a direction separating away from a center of a pole.Type: GrantFiled: October 13, 2008Date of Patent: November 16, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tadashi Tokumasu, Masafumi Fujita, Mikio Kakiuchi
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Publication number: 20100277029Abstract: There is provided a 3-phase 2-layer armature winding of a rotating electrical machine. The lead-out connection conductor connected to the output terminal is connected to a coil piece positioned at least farther than a first coil piece inside the phase belt counted from the end of the each phase belt, and a coil piece positioned at the end of the phase belt is connected to a coil piece positioned at least farther than the n-th (n is an integer larger than 1) inside the phase belt counted from the other end of the phase belt in the same parallel circuit, by a jumper wire.Type: ApplicationFiled: July 12, 2010Publication date: November 4, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi, Hiroshi Hatano, Takashi Ueda, Ken Nagakura
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Publication number: 20100270875Abstract: According to one embodiment, in a high-voltage bushing of a rotating electric machine, the communicating holes are inclined at least toward a circumferential direction of the hollow conductor or toward a machine external side from a direction vertical to a wall surface of the hollow conductor.Type: ApplicationFiled: April 23, 2010Publication date: October 28, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuo Kabata, Yoshihiro Taniyama, Junichi Uematsu, Mikio Kakiuchi, Takashi Ueda
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Patent number: 7812499Abstract: An armature winding of an electric rotating machine is provided, which includes at least one armature winding bar composed of a plurality of element wire conductors, wherein the armature winding bar includes an element wire conductor configured to have twisted transposing angles of 180 degrees at one border zone and a middle zone in a winding slot and a twisted transposing angle different from 180 degrees at the other border zone of the winding slot of the element wire conductor.Type: GrantFiled: July 31, 2009Date of Patent: October 12, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi
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Publication number: 20090289518Abstract: An armature winding of an electric rotating machine is provided, which includes at least one armature winding bar composed of a plurality of element wire conductors, wherein the armature winding bar includes an element wire conductor configured to have twisted transposing angles of 180 degrees at one border zone and a middle zone in a winding slot and a twisted transposing angle different from 180 degrees at the other border zone of the winding slot of the element wire conductor.Type: ApplicationFiled: July 31, 2009Publication date: November 26, 2009Inventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi
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Patent number: 7602089Abstract: A rotary electric machine includes: a stator, a rotor and rotor fans contained in a closed type frame. The cooling gas is circulated in the frame by the rotor fans and warmed as a result of heat exchange with the stator and the rotor is cooled by a gas cooler. A heat pump is adapted to use cooling water or ambient air as high temperature heat source and liquid coolant as low temperature heat source. A liquid coolant circulation system for supplying liquid coolant to the heat exchange section of the gas cooler is provided. The liquid coolant is cooled by the heat pump and is supplied to the heat exchange section of the gas cooler by means of the coolant circulation system.Type: GrantFiled: June 12, 2007Date of Patent: October 13, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Yasuo Kabata, Katsuya Yamashita, Yoshihiro Taniyama, Tadashi Tokumasu, Mikio Kakiuchi, Koji Matsuyama
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Patent number: 7592732Abstract: Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core.Type: GrantFiled: October 31, 2007Date of Patent: September 22, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Masanori Arata, Mikio Kakiuchi, Susumu Nagano
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Patent number: 7579737Abstract: An armature winding of an electric rotating machine is provided, which includes at least one armature winding bar composed of a plurality of element wire conductors, wherein the armature winding bar includes an element wire conductor configured to have twisted transposing angles of 180 degrees at one border zone and a middle zone in a winding slot and a twisted transposing angle different from 180 degrees at the other border zone of the winding slot of the element wire conductor.Type: GrantFiled: October 30, 2007Date of Patent: August 25, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi
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Patent number: 7579739Abstract: Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core.Type: GrantFiled: October 31, 2007Date of Patent: August 25, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Masanori Arata, Mikio Kakiuchi, Susumu Nagano
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Publication number: 20090195105Abstract: In an armature, the upper and lower coil pieces in one half of the parallel circuits are located at the 1st, 4th, 6th, 7th, 9th, 12th and 14th positions, and the upper and lower coil pieces in remaining half of the parallel circuits are located at the 2nd, 3rd, 5th, 8th, 10th, 11th and 13th positions, when relative positions of the upper and lower coil pieces in each phase belt are indicated by positions counted in a direction separating away from a pole center.Type: ApplicationFiled: January 29, 2009Publication date: August 6, 2009Applicant: Kabushiki Kaisha ToshibaInventors: Tadashi Tokumasu, Masafumi Fujita, Takashi Ueda, Mikio Kakiuchi
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Publication number: 20090096312Abstract: In an armature, the upper and lower coil pieces in the first and third parallel circuits are located at the 1st, 4th, 6th, 7th, 10th and 12th positions, and the upper and lower coil pieces in the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 8th, 9th and 11th positions, when relative positions of the upper and lower coil pieces in one of the first and second phase belts are indicated by positions counted in a direction separating away from a center of a pole.Type: ApplicationFiled: October 13, 2008Publication date: April 16, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tadashi Tokumasu, Masafumi Fujita, Mikio Kakiuchi
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Patent number: 7498517Abstract: A mica tape comprising a mica foil, a glass cloth, and an inorganic filler arranged on the glass cloth, wherein the mica tape is wound a plurality of times about an outer circumferential surface of a conductor portion of an electrical rotating machine coil so as to form an insulating layer for the coil, and the inorganic filler has a Mohs hardness falling within a range of 1 to 7 and exhibits a heat conductivity superior to those of the mica foil and the glass cloth, whereby, the inorganic filler is excellent in the heat conductivity and has a Mohs hardness not lower than that of the glass cloth contained in the mica tape, when used together with the inorganic filler.Type: GrantFiled: May 24, 2007Date of Patent: March 3, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Fumio Sawa, Noriyuki Iwata, Hiroshi Hatano, Tetsushi Okamoto, Kazuma Mukai, Toshiyuki Aso, Makoto Kawahara, Mikio Kakiuchi
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Publication number: 20080296989Abstract: The depth from the open end of a rotor slot closest to a magnetic pole of a rotary core to a slot bottom or the bottom of a subslot provided as a coolant ventilation path on a rotor slot bottom is made less than the depth of slots at and after a second slot counted from the magnetic pole side in the direction of internal circumference, and when a shortest distance between the bottoms of the rotor slots opposed to each other through a magnetic pole or a shortest distance between the bottoms of the subslots is assumed to be a magnetic pole width of the slots, a magnetic pole width Wp1 of a slot closest to the magnetic pole side is set to 85% or more of a magnetic pole width Wp2 of a second slot counted from the magnetic pole side in the direction of internal circumference.Type: ApplicationFiled: May 27, 2008Publication date: December 4, 2008Inventors: Masafumi FUJITA, Tadashi Tokumasu, Yasuo Kabata, Mikio Kakiuchi, Masanori Arata, Takashi Ueda
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Publication number: 20080252169Abstract: Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core.Type: ApplicationFiled: October 31, 2007Publication date: October 16, 2008Inventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Masanori Arata, Mikio Kakiuchi, Susumu Nagano
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Publication number: 20080252156Abstract: A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils.Type: ApplicationFiled: March 28, 2008Publication date: October 16, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuo Kabata, Masafumi Fujita, Mikio Takabatake, Hitoshi Katayama, Mikio Kakiuchi, Koji Matsuyama, Yoshiyuki Shimoda
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Publication number: 20080252168Abstract: Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core.Type: ApplicationFiled: October 31, 2007Publication date: October 16, 2008Inventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Masanori Arata, Mikio Kakiuchi, Susumu Nagano
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Patent number: 7425366Abstract: The invention aims to provide a highly heat conductive tape member or sheet member and a method for easily producing a highly heat conductive tape member or sheet member. The mica tape member or mica sheet member of the invention includes a mica-containing layer and a lining material, and the mica-containing layer contains scaly particles, particles having a heat conductivity of 0.5 W/mK or higher and a size of 1 ?m or smaller, and a binder.Type: GrantFiled: July 14, 2006Date of Patent: September 16, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Tetsushi Okamoto, Fumio Sawa, Noriyuki Iwata, Mikio Kakiuchi, Toshimitsu Yamada