Patents by Inventor Akitomi Semba
Akitomi Semba 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: 20150081528Abstract: The present invention provides a method and a system for providing an energy creation service of a turbine generator. The users can receive a desired energy creation service without any initial investment and the providers of the service can expect sufficient profits. The method includes the steps of installing a new turbine generator for a user owning a power-generating facility having a turbine generator; obtaining power generation efficiency of the new turbine generator by a monitoring device; comparing the power generation efficiency of the new turbine generator and power generation efficiency of a turbine generator predetermined as a standard, by a computing device; performing a charging process for an excess of the power generation efficiency of the new turbine generator over the power generation efficiency of the standard turbine generator, by a processing device; and charging the user for a price reflecting the excess of the power generation efficiency.Type: ApplicationFiled: August 20, 2014Publication date: March 19, 2015Inventors: Kenichi HATTORI, Hiroshi MORIMOTO, Gustavo MONTOYA, Atsushi ISHIHARA, Tomoaki HAYAMIZU, Akitomi SEMBA, Takashi YABUTANI
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Patent number: 8882356Abstract: A horizontal shaft type rotary machine capable of simply feeding oil into thrust bearing devices. Leak oil introduction is provided in the circumferential end parts of thrust bearing devices, for introducing leak oil of lubrication oil from horizontal type slide bearing devices onto slide surfaces of the thrust bearing devices. With this configuration, the thrust baring devices can be lubricated with the use of leak oil of lubrication oil from the horizontal type slide bearing devices, and as a result, it is possible to eliminate the necessity of an oil feed system exclusively used for the thrust bearing devices, thereby it is possible to simplify the pipe line arrangement of the oil feed system and the control of oil feed quantity.Type: GrantFiled: February 27, 2012Date of Patent: November 11, 2014Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Keiji Fugane, Makoto Hemmi
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Publication number: 20120155790Abstract: The invention provides a horizontal shaft type rotary machine capable of simply feeding oil into thrust bearing devices. Leak oil introduction means are provided in the circumferential end parts of thrust bearing devices, for introducing leak oil of lubrication oil from horizontal type slide bearing devices onto slide surfaces of the thrust bearing devices. With this configuration, the thrust baring devices can be lubricated with the use of leak oil of lubrication oil from the horizontal type slide bearing devices, and as a result, it is possible to eliminate the necessity of an oil feed system exclusively used for the thrust bearing devices, thereby it is possible to simplify the pipe line arrangement of the oil feed system and the control of oil feed quantity.Type: ApplicationFiled: February 27, 2012Publication date: June 21, 2012Applicant: HITACHI, LTD.Inventors: Kenichi HATTORI, Tadaaki KAKIMOTO, Akitomi SEMBA, Keiji FUGANE, Makoto HEMMI
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Patent number: 8049378Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.Type: GrantFiled: January 19, 2011Date of Patent: November 1, 2011Assignee: Hitachi, Ltd.Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
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Patent number: 7939977Abstract: A rotor for a rotary electrical device to be arranged to face to a stator, comprises a rotor iron core extending axially and including a plurality of slots arranged with a predetermined circumferential interval, a rotor coil contained by the slots, a coil support member of electrically insulating property arranged between parts of the rotor coil at an axial end of the rotor coil, and a retaining ring covering the coil support member and the axial end of the rotor coil, the coil support member has two fitted portions and a connecting portion connecting the fitted portions to each other to form H-shape of cross section and to form a space between the rotor coil and each of opposite sides of the connecting portion, and the coil support member further has a communicating path communicating to the spaces.Type: GrantFiled: January 23, 2007Date of Patent: May 10, 2011Assignee: Hitachi, Ltd.Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Takashi Shibata, Manabu Suzuki, Naomi Okamoto
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Publication number: 20110101801Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.Type: ApplicationFiled: January 19, 2011Publication date: May 5, 2011Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
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Patent number: 7898128Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.Type: GrantFiled: January 11, 2008Date of Patent: March 1, 2011Assignee: Hitachi, Ltd.Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
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Patent number: 7893574Abstract: In a rotor of a rotary-electric machine, in order to improve a cooling performance of a rotor winding on an end portion of the rotor in an axial direction, the rotor winding being held by a retaining ring of the rotor winding formed by laminating conductors in slots of a rotor iron core extending in an axial direction and having slots formed at predetermined intervals in a peripheral direction, ventilation channels through which cooling air flows are formed in the surfaces of the conductors along a longitudinal direction. The ventilation channels have air inlet holes which guide the cooling air and exhaust holes which exhaust the cooling air, the conductors are laminated to constitute the rotor winding, and the conductors include openings of the air inlet holes in bottoms of the conductors on a side opposite to a side on which the ventilation channels are formed.Type: GrantFiled: November 3, 2009Date of Patent: February 22, 2011Assignee: Hitachi, Ltd.Inventors: Kenichi Hattori, Mitsuru Saeki, Akitomi Semba, Tadaaki Kakimoto, Takashi Watanabe, Manabu Suzuki, Takashi Shibata, Seijiro Muramatsu
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Patent number: 7832934Abstract: A thrust bearing device comprising a runner portion attached to a rotational axis and having a plane perpendicular to the axial direction of the rotational axis, and a fixed portion having a sliding surface facing the plane of the runner portion, wherein the fixed portion has a plurality of oil grooves extending in radial directions formed on the sliding surface, a plurality of tapered lands formed among some of the plurality of oil grooves on the sliding surface and having a tapered plane and a plane, a plurality of flat parts formed among the remainder of the plurality of oil grooves on the sliding surface and having only a plane, and a plurality of oil supply openings formed in each of the plurality flat parts and pressurized oil is externally supplied.Type: GrantFiled: August 9, 2007Date of Patent: November 16, 2010Assignee: Hitachi, Ltd.Inventors: Makoto Hemmi, Akitomi Semba
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Patent number: 7825559Abstract: A rotation machine is configured such that permanent magnets and pole shoes holding the permanent magnets at the outer diameter side of the permanent magnets are provided for a rotor, and an outer diameter size (Ra) in the axial end portion of the pole shoe is made smaller than an outer diameter size (Rb) in the axial center portion.Type: GrantFiled: December 26, 2006Date of Patent: November 2, 2010Assignee: Hitachi, Ltd.Inventors: Akihito Nakahara, Kazuhiko Takahashi, Mamoru Kimura, Akitomi Semba
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Patent number: 7728473Abstract: A electric rotating machine includes a rotor winding constituting a part of a rotor, a conductor provided in a center portion in a radial direction of a rotor body for supplying electricity to the rotor winding from the outside, a leader drawn from the conductor to an outside diameter side, and a connecting line constructed by stacking a plurality of conductor plates to electrically connect the rotor winding and the leader. The connecting line consists of a radial direction linear portion which is straight in the radial direction on the leader side, and a bending portion which branches into two routes toward opposite directions to each other in a rotor shaft direction from the radial direction linear portion and has a linear portion formed at a part of the bending portion. The linear portion of the bending portion is joined to a bottom surface of the rotor winding.Type: GrantFiled: April 1, 2009Date of Patent: June 1, 2010Assignees: Hitachi, Ltd., Hitachi Engineering & Services Co., Ltd.Inventors: Akitomi Semba, Fumihiko Goto, Juichi Enyama
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Publication number: 20100045126Abstract: In a rotor of a rotary-electric machine, in order to improve a cooling performance of a rotor winding on an end portion of the rotor in an axial direction, the rotor winding being held by a retaining ring of the rotor winding formed by laminating conductors in slots of a rotor iron core extending in an axial direction and having slots formed at predetermined intervals in a peripheral direction, ventilation channels through which cooling air flows are formed in the surfaces of the conductors along a longitudinal direction. The ventilation channels have air inlet holes which guide the cooling air and exhaust holes which exhaust the cooling air, the conductors are laminated to constitute the rotor winding, and the conductors include openings of the air inlet holes in bottoms of the conductors on a side opposite to a side on which the ventilation channels are formed.Type: ApplicationFiled: November 3, 2009Publication date: February 25, 2010Inventors: KENICHI HATTORI, MITSURU SAEKI, AKITOMI SEMBA, TADAAKI KAKIMOTO, TAKASHI WATANABE, MANABU SUZUKI, TAKASHI SHIBATA, SEIJIRO MURAMATSU
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Patent number: 7638909Abstract: In a rotor of a rotary-electric machine, in order to improve a cooling performance of a rotor winding, in a rotor winding on an end portion of the rotor in an axial direction, the rotor winding being held by a retaining ring of the rotor winding formed by laminating a plurality of conductors in slots of a rotor iron core extending in an axial direction and having a plurality of slots formed at predetermined intervals in a peripheral direction, ventilation channels through which cooling air flows are formed in the surfaces of the conductors along a longitudinal direction.Type: GrantFiled: October 17, 2006Date of Patent: December 29, 2009Assignee: Hitachi, Ltd.Inventors: Kenichi Hattori, Mitsuru Saeki, Akitomi Semba, Tadaaki Kakimoto, Takashi Watanabe, Manabu Suzuki, Takashi Shibata, Seijiro Muramatsu
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Publication number: 20090304316Abstract: The invention provides a horizontal shaft type rotary machine capable of simply feeding oil into thrust bearing devices. Leak oil introduction means are provided in the circumferential end parts of thrust bearing devices, for introducing leak oil of lubrication oil from horizontal type slide bearing devices onto slide surfaces of the thrust bearing devices. With this configuration, the thrust baring devices can be lubricated with the use of leak oil of lubrication oil from the horizontal type slide bearing devices, and as a result, it is possible to eliminate the necessity of an oil feed system exclusively used for the thrust bearing devices, thereby it is possible to simplify the pipe line arrangement of the oil feed system and the control of oil feed quantity.Type: ApplicationFiled: May 11, 2009Publication date: December 10, 2009Applicant: HITACHI, LTD.Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Keiji Fugane, Makoto Hemmi
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Publication number: 20090205194Abstract: A electric rotating machine includes a rotor winding constituting a part of a rotor, a conductor provided in a center portion in a radial direction of a rotor body for supplying electricity to the rotor winding from the outside, a leader drawn from the conductor to an outside diameter side, and a connecting line constructed by stacking a plurality of conductor plates to electrically connect the rotor winding and the leader. The connecting line consists of a radial direction linear portion which is straight in the radial direction on the leader side, and a bending portion which branches into two routes toward opposite directions to each other in a rotor shaft direction from the radial direction linear portion and has a linear portion formed at a part of the bending portion. The linear portion of the bending portion is joined to a bottom surface of the rotor winding.Type: ApplicationFiled: April 1, 2009Publication date: August 20, 2009Inventors: Akitomi Semba, Fumihiko Goto, Juichi Enyama
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Patent number: 7521829Abstract: A electric rotating machine includes a rotor winding constituting a part of a rotor, a conductor provided in a center portion in a radial direction of a rotor body for supplying electricity to the rotor winding from the outside, a leader drawn from the conductor to an outside diameter side, and a connecting line constructed by stacking a plurality of conductor plates to electrically connect the rotor winding and the leader. The connecting line consists of a radial direction linear portion which is straight in the radial direction on the leader side, and a bending portion which branches into two routes toward opposite directions to each other in a rotor shaft direction from the radial direction linear portion and has a linear portion formed at a part of the bending portion. The linear portion of the bending portion is joined to a bottom surface of the rotor winding.Type: GrantFiled: October 6, 2006Date of Patent: April 21, 2009Assignees: Hitachi, Ltd., Hitachi Engineering & Services Co., Ltd.Inventors: Akitomi Semba, Fumihiko Goto, Juichi Enyama
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Publication number: 20080169710Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Inventors: Kenichi HATTORI, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
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Publication number: 20080085068Abstract: A thrust bearing device comprising a runner portion attached to a rotational axis and having a plane perpendicular to the axial direction of the rotational axis, and a fixed portion having a sliding surface facing the plane of the runner portion, wherein the fixed portion has a plurality of oil grooves extending in radial directions formed on the sliding surface, a plurality of tapered lands formed among some of the plurality of oil grooves on the sliding surface and having a tapered plane and a plane, a plurality of flat parts formed among the remainder of the plurality of oil grooves on the sliding surface and having only a plane, and a plurality of oil supply openings formed in each of the plurality flat parts and pressurized oil is externally supplied.Type: ApplicationFiled: August 9, 2007Publication date: April 10, 2008Inventors: Makoto Hemmi, Akitomi Semba
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Publication number: 20070222333Abstract: A rotor for a rotary electrical device to be arranged to face to a stator, comprises a rotor iron core extending axially and including a plurality of slots arranged with a predetermined circumferential interval, a rotor coil contained by the slots, a coil support member of electrically insulating property arranged between parts of the rotor coil at an axial end of the rotor coil, and a retaining ring covering the coil support member and the axial end of the rotor coil, the coil support member has two fitted portions and a connecting portion connecting the fitted portions to each other to form H-shape of cross section and to form a space between the rotor coil and each of opposite sides of the connecting portion, and the coil support member further has a communicating path communicating to the spaces.Type: ApplicationFiled: January 23, 2007Publication date: September 27, 2007Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Takashi Shibata, Manabu Suzuki, Naomi Okamoto
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Publication number: 20070145848Abstract: A rotation machine is configured such that permanent magnets and pole shoes holding the permanent magnets at the outer diameter side of the permanent magnets are provided for a rotor, and an outer diameter size (Ra) in the axial end portion of the pole shoe is made smaller than an outer diameter size (Rb) in the axial center portion.Type: ApplicationFiled: December 26, 2006Publication date: June 28, 2007Inventors: Akihito Nakahara, Kazuhiko Takahashi, Mamoru Kimura, Akitomi Semba