Patents by Inventor Kenta DEGUCHI
Kenta DEGUCHI 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: 11632073Abstract: A rotating machine drive system includes a power supply, an electric motor, a rotating machine, a belt drive transmission unit, an electrical information detection sensor, and a diagnostic unit. The electrical information detection sensor detects a current or a voltage. The diagnostic unit calculates estimated rotational speed information of the rotating machine based on the current or the voltage, calculates a reference rotational frequency from a rotational speed of the electric motor and a ratio between a diameter of the electric motor side pulley and a diameter of the rotating machine side pulley. The diagnostic unit uses a difference or a ratio between the estimated rotational speed information and the reference rotational frequency to determine whether or not there is the transmission abnormality.Type: GrantFiled: May 26, 2020Date of Patent: April 18, 2023Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Yuki Makaino, Nobuyuki Narisawa, Kenta Deguchi
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Publication number: 20220069759Abstract: In the invention, it is determined whether or not a transmission abnormality occurs in a belt drive transmission unit including pulleys and a belt which are present between an electric motor and a rotating machine. An electric motor, a rotating machine, and a belt drive transmission unit installed therebetween are provided, and a diagnostic unit is provided which detects a current or a voltage of the electric motor, determines whether or not there is a transmission abnormality of the belt drive transmission unit, based on the current or the voltage, and outputs an abnormality detection signal when it has been determined that there is the transmission abnormality.Type: ApplicationFiled: May 26, 2020Publication date: March 3, 2022Inventors: Yuki MAKAINO, Nobuyuki NARISAWA, Kenta DEGUCHI
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Publication number: 20210405118Abstract: An object of the present invention is to provide a technique for monitoring the condition of a device or a target processing object. A monitoring system according to one aspect of the present invention monitors a device powered by an AC motor and estimates a condition of at least one of the device or a target processing object of the device, and includes a time-series data acquisition unit configured to acquire voltage data relating to a drive voltage of an AC motor; a feature value computation unit configured to analyze a feature value of an abnormal voltage waveform in a time-series waveform of the voltage data; and a state estimation unit configured to estimate the condition based on the feature value of the abnormal voltage waveform.Type: ApplicationFiled: October 1, 2019Publication date: December 30, 2021Inventors: Akihiro NAKAMURA, Kenta DEGUCHI, Yoshitaka IWAJI
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Patent number: 11205935Abstract: The purpose of the present invention is to obtain a structure with which it is possible to improve the heat dissipation performance and efficiency of an axial gap dynamo-electric machine. Accordingly, the present invention is an axial gap dynamo-electric machine of such construction that a disc-shaped rotor in which permanent magnets are disposed is provided in the axial direction and a stator is disposed in the axial-direction center portion, wherein the outer circumferential side of a stator winding is in intimate contact with the inside diameter of a housing, embedding with a mold resin is used for the housing and a stator core and for a stator coil and the housing so that a connection is established with the housing, and the housing comprises a nonmagnetic, electrically nonconductive material.Type: GrantFiled: November 1, 2017Date of Patent: December 21, 2021Assignee: Hitachi, Ltd.Inventors: Yuji Enomoto, Hirooki Tokoi, Kenta Deguchi
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Patent number: 10566876Abstract: To significantly improve a heat dissipation property of an axial gap rotary electric machine within a size necessary for configuring a motor. In an axial gap rotary electric machine comprising a stator and a rotor in an axial direction, the stator has a plurality of stator cores arranged in a circumferential direction and coils wound around the stator cores, and a heat pipe obtained by filling an inside of a metal hollow pipe with a refrigerant is arranged in a gap between adjacent coils formed in an outer diameter portion of the stator in a radial direction and a housing with a necessary insulation distance between the coils and the heat pipe. The heat pipe extends in a direction of a rotation axis and an opposite output side, and is in contact with a heat dissipating fin outside an end bracket on the opposite output side.Type: GrantFiled: February 25, 2016Date of Patent: February 18, 2020Assignee: Hitachi, Ltd.Inventors: Yuji Enomoto, Hirooki Tokoi, Naoki Sakurai, Hisashi Tanie, Kenta Deguchi
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Publication number: 20200006998Abstract: The purpose of the present invention is to obtain a structure with which it is possible to improve the heat dissipation performance and efficiency of an axial gap dynamo-electric machine. Accordingly, the present invention is an axial gap dynamo-electric machine of such construction that a disc-shaped rotor in which permanent magnets are disposed is provided in the axial direction and a stator is disposed in the axial-direction center portion, wherein the outer circumferential side of a stator winding is in intimate contact with the inside diameter of a housing, embedding with a mold resin is used for the housing and a stator core and for a stator coil and the housing so that a connection is established with the housing, and the housing comprises a non-magnetic, electrically nonconductive material.Type: ApplicationFiled: November 1, 2017Publication date: January 2, 2020Inventors: Yuji ENOMOTO, Hirooki TOKOI, Kenta DEGUCHI
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Publication number: 20190058374Abstract: To significantly improve a heat dissipation property of an axial gap rotary electric machine within a size necessary for configuring a motor. In an axial gap rotary electric machine comprising a stator and a rotor in an axial direction, the stator has a plurality of stator cores arranged in a circumferential direction and coils wound around the stator cores, and a heat pipe obtained by filling an inside of a metal hollow pipe with a refrigerant is arranged in a gap between adjacent coils formed in an outer diameter portion of the stator in a radial direction and a housing with a necessary insulation distance between the coils and the heat pipe. The heat pipe extends in a direction of a rotation axis and an opposite output side, and is in contact with a heat dissipating fin outside an end bracket on the opposite output side.Type: ApplicationFiled: February 25, 2016Publication date: February 21, 2019Applicant: Hitachi .Ltd.Inventors: Yuji ENOMOTO, Hirooki TOKOI, Naoki SAKURAI, Hisashi TANIE, Kenta DEGUCHI
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Patent number: 9985491Abstract: Stator coils each consist of a plurality of rectangular conductor coil pieces, the adjacent connection ends of which are connected to each other on the outer diameter side of a stator. The coil pieces each have: a folded portion folded in a rotation axis direction on the inner diameter side of the stator; inner diameter-side open leg portions opened from both sides of the folded portion toward the circumferential directions of the rotation axis; linear portions each bent from each of the inner diameter-side open leg portions and disposed so as to pass through the stator from the inner diameter side to the outer diameter side; and an outer diameter-side open leg portions opened from the linear portions toward the circumferential directions of the rotation axis and extending to the connection ends.Type: GrantFiled: December 3, 2014Date of Patent: May 29, 2018Assignee: Hitachi, Ltd.Inventors: Yuichiro Tanaka, Koichi Watanabe, Satoshi Kikuchi, Akihito Nakahara, Kenta Deguchi
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Publication number: 20160329766Abstract: Stator coils each consist of a plurality of rectangular conductor coil pieces, the adjacent connection ends of which are connected to each other on the outer diameter side of a stator. The coil pieces each have: a folded portion folded in a rotation axis direction on the inner diameter side of the stator; inner diameter-side open leg portions opened from both sides of the folded portion toward the circumferential directions of the rotation axis; linear portions each bent from each of the inner diameter-side open leg portions and disposed so as to pass through the stator from the inner diameter side to the outer diameter side; and an outer diameter-side open leg portions opened from the linear portions toward the circumferential directions of the rotation axis and extending to the connection ends.Type: ApplicationFiled: December 3, 2014Publication date: November 10, 2016Inventors: Yuichiro TANAKA, Koichi WATANABE, Satoshi KIKUCHI, Akihito NAKAHARA, Kenta DEGUCHI
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Publication number: 20150380992Abstract: The grounding of a stator core with an inexpensive structure and high reliability is to be realized in an axial gap-type electric rotating machine in which a stator is held by resin molding. An axial gap-type electric rotating machine according to the invention includes: a stator having a stator core; a shaft penetrating the stator; a rotor arranged with a space from the stator with respect to the direction of the shaft; a housing which accommodates the stator; a first connection member which connects the stator core and the housing; and a resin material which fixes the stator to an inner wall of the housing. The first connection member is provided with a first connection portion which connects to the stator core, a second connection portion which connects to the inner wall of the housing, and a plastic deformation portion between the first connection portion and the second connection portion.Type: ApplicationFiled: January 23, 2013Publication date: December 31, 2015Inventors: Yuji ENOMOTO, Hirooki TOKOI, Kenta DEGUCHI
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Publication number: 20150349591Abstract: There is provided an axial gap polyphase motor whereby losses caused by eddy currents generated in a stator core can be eliminated, while the stator core can be prevented from shifting out of position. The stator for use in the axial gap polyphase motor is provided with a layered stator core 1A having a plurality of core portions 2 arranged at equal spacing in the circumferential direction and protruding in the axial direction, and a plurality of supporting portions connecting and supporting the adjacent core portions 2, coils wound onto the core portions 2, and fastening members 4 made of conductive material. Only the core portions 2 onto which are wound the coils for flow of electric current of a single phase from among the multiple phases have first apertures 2H in the radial direction. The fastening members 4 are inserted into the first apertures 2H.Type: ApplicationFiled: November 18, 2013Publication date: December 3, 2015Inventors: Kenta DEGUCHI, Yuji ENOMOTO, Hirooki TOKOI
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Publication number: 20150349608Abstract: Provided is an axial gap motor provided with a rotor fixed to a rotary shaft, a stator facing the rotor along a shaft direction, a flow passage forming body that forms a flow passage through which a cooling refrigerant is flowed, and a housing that houses the rotor and the stator and that holds the flow passage forming body. The flow passage forming body forms an inflow port provided on a first surface of the housing facing the shaft direction, a flow passage portion passing from the inflow port through a lateral portion of the rotor in a radial direction, and a discharge port connected to the flow passage portion and provided closer to the stator than the rotor in the shaft direction.Type: ApplicationFiled: May 27, 2015Publication date: December 3, 2015Inventors: Yoshitsugu TSUTSUMI, Kenta DEGUCHI, Akihito NAKAHARA, Satoshi KIKUCHI
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Publication number: 20150349588Abstract: Provided is a bearing electrolytic corrosion countermeasure technology achieving excellent reliability without increasing the number of components.Type: ApplicationFiled: January 24, 2014Publication date: December 3, 2015Inventors: Hirooki TOKOI, Yuji ENOMOTO, Kenta DEGUCHI, Taizo MIYAZAKI, Koji OBATA
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Patent number: 9154020Abstract: An axial gap rotating-electric machine includes a stator, a rotor arranged via an air gap in the direction of an axis of rotation of a rotating-electric machine with respect to the stator, and a housing configured to accommodate the stator and the rotor, and the stator includes a plurality of stator cores arranged in the circumferential direction, coils configured to wind the peripheries of the respective stator cores, and a resin for molding the plurality of stator cores wound with the coils, and the stator cores each include a protruding portion protruding partly from the coil in the direction of axis of rotation, and a conductive member is provided so as to come into contact with peripheral surfaces of the protruding portions of the stator cores, and grounding is achieved by the conductive member.Type: GrantFiled: July 3, 2013Date of Patent: October 6, 2015Assignee: Hitachi, Ltd.Inventors: Kenta Deguchi, Hirooki Tokoi, Zhuonan Wang, Norihisa Iwasaki, Yuji Enomoto
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Publication number: 20150001979Abstract: An axial gap rotating electric machine includes a pair of rotors fixed to a rotating shaft, a stator, a holding member holding the stator, and a housing. The stator includes cores arranged in a circumferential direction of the rotating shaft, and coils wound around the cores. The holding member and the housing are conductive. The holding member includes an outer peripheral portion firmly fixed on an inner wall of the housing, and a protruding portion protruding from the outer peripheral portion toward the rotating shaft. The protruding portion includes a plurality of protruding portions in the circumferential direction of the rotating shaft. The core is held by a pair of the protruding portions adjacent in the circumferential direction of the rotating shaft, and a gap to interrupt a path of eddy currents between distal ends of the pair of the protruding portions is provided between the distal ends.Type: ApplicationFiled: June 25, 2014Publication date: January 1, 2015Inventors: Kenta DEGUCHI, Hirooki TOKOI, Yuji ENOMOTO
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Publication number: 20140009009Abstract: An axial gap rotating-electric machine includes a stator, a rotor arranged via an air gap in the direction of an axis of rotation of a rotating-electric machine with respect to the stator, and a housing configured to accommodate the stator and the rotor, and the stator includes a plurality of stator cores arranged in the circumferential direction, coils configured to wind the peripheries of the respective stator cores, and a resin for molding the plurality of stator cores wound with the coils, and the stator cores each include a protruding portion protruding partly from the coil in the direction of axis of rotation, and a conductive member is provided so as to come into contact with peripheral surfaces of the protruding portions of the stator cores, and grounding is achieved by the conductive member.Type: ApplicationFiled: July 3, 2013Publication date: January 9, 2014Inventors: Kenta DEGUCHI, Hirooki TOKOI, Zhuonan WANG, Norihisa IWASAKI, Yuji ENOMOTO