Patents by Inventor Masafumi Fujita
Masafumi Fujita 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: 8076805Abstract: 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: GrantFiled: March 28, 2008Date of Patent: December 13, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yasuo Kabata, Masafumi Fujita, Mikio Takabatake, Hitoshi Katayama, Mikio Kakiuchi, Koji Matsuyama, Yoshiyuki Shimoda
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Publication number: 20110215661Abstract: According to an embodiment, radially extending inner spacers are provided in a stator core at a distance from each other in the circumferential direction at intervals between a prescribed number of stacked magnetic steel plates, and ventilation ducts for cooling gas flow are formed in the radial direction. The perimeter of each ventilation duct is defined by the inner spacers and a magnetic steel plate separated by the inner spacers. The cooling gas, which flows in the rotation direction, is split laterally to both sides of a rotor coil and directed toward the outer circumference. Portions of the shoulder parts of a wedge are cut off such that the width of the shoulder parts of the wedge at positions corresponding to the ventilation ducts matches the slot width.Type: ApplicationFiled: May 19, 2011Publication date: September 8, 2011Inventors: Yasuo KABATA, Masafumi Fujita, Koji Matsuyama, Yuuichiro Gunji
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Patent number: 8008829Abstract: 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: GrantFiled: January 29, 2009Date of Patent: August 30, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Tadashi Tokumasu, Masafumi Fujita, Takashi Ueda, Mikio Kakiuchi
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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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Publication number: 20110015913Abstract: Provided is a simulation method, whereby the calibration operation load can be reduced while minimizing a lowering in prediction accuracy, and a simulation apparatus. It is also intended to provide a biological treatment method, whereby the required operation load can be reduced, and a biological treatment apparatus. These problems can be solved by employing as parameters the maximum reaction speed in the reaction of decomposing a material to be treated with a bacterium and the amount of the above-described material to be treated that is loaded per bacterial cell in a unit time during the biological treatment process or the amount of the above-described material that has been treated per bacterial cell in a unit time in a state where these parameters are in a definite functional relation.Type: ApplicationFiled: June 19, 2008Publication date: January 20, 2011Applicant: KOBELCO ECO-SOLUTIONS CO., LTD.Inventors: Tetsuo Yamashita, Naohiro Takeda, Mie Minakawa, Jun Takezaki, Masafumi Fujita, Koji Tsuji, Akira Akashi
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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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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: 20100084942Abstract: A rotating electric machine is provided, where a generator has an increased capacity and a reduced size achieved by electromagnetically effectively utilizing that parts of a rotor core which are outside the narrowest parts of magnetic poles of the rotor core to permit large field current and suppress an increase in temperature of rotor coils. The rotating electric machine includes a stator constructed by winding armature coils around a stator core (1), and a hollow circular cylindrical rotor. The rotor has at least one pair of magnetic poles (2), non-polar portions (3) between the magnetic poles, and interpolar portions (6) arranged in the non-polar portions. In the non-polar portions (3), a plurality of rotor slots (4) are arranged at predetermined intervals. Field windings are wound in each rotor slot (4).Type: ApplicationFiled: April 18, 2007Publication date: April 8, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yoshihiro Taniyama, Yasuo Kabata, Masafumi Fujita, Tadashi Tokumasu, Norio Takahashi, Masanori Arata, Ken Nagakura
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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: 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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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: 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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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