Patents by Inventor Kotaro MURA
Kotaro MURA 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: 20230399504Abstract: A resin producing method is a method of producing a resin with which an insulating structure formed on an outer peripheral portion of a conductor is impregnated. The resin producing method includes a dispersion liquid mixing step of mixing an epoxy resin and a dispersion liquid in which a nanofiller is dispersed in a reactive diluent that reduces a viscosity of the epoxy resin by reacting with the epoxy resin, and a curing agent mixing step of mixing a composition produced by the dispersion liquid mixing step, with a curing agent that cures the epoxy resin. The epoxy resin includes, for example, an alicyclic epoxy resin.Type: ApplicationFiled: April 16, 2021Publication date: December 14, 2023Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yu YAMASHITA, Tetsuo YOSHIMITSU, Kotaro MURA, Takahiro IMAI
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Patent number: 10938260Abstract: A producing method is for an electrical insulating structure to cover an outer surface of a to-be-insulated object. The method comprises: a tape production step of producing a main insulation tape by using a nanoparticle-containing joining macromolecular polymer; a taping step of winding a main insulation tape on outside of the to-be-insulated object to form a main insulated part; a vacuum drawing step, which is performed after the taping step, of vacuum drawing the tape-wound to-be-insulated object; and an impregnation step, which is performed after the vacuum drawing step, of injecting a impregnating macromolecular polymer to impregnate the main insulated part therewith.Type: GrantFiled: December 20, 2018Date of Patent: March 2, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro Mura, Shinsuke Kikuta, Toshihiro Tsuda, Tetsuo Yoshimitsu
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Patent number: 10931159Abstract: A producing method is for an electrical insulating structure covering an outer surface of a to-be-insulated object. The electrical insulating structure producing method comprises: a sheet production step of producing a main insulating sheet in which nanoparticles have been mixed; a cutting step in which the main insulating sheet is cut into main insulation tapes; a taping step of winding each of main insulation tapes on outside of the to-be-insulated object to produce a tape-wound to-be-insulated object in which a main insulated part is formed; a vacuum drawing step of vacuum drawing the tape-wound to-be-insulated object; an impregnation step of injecting a impregnating macromolecular polymer to impregnate the main insulated part in the tape-wound to-be-insulated object, and a solidifying step of raising the temperature of the insulated part to solidify the macromolecular polymer containing the nanoparticles.Type: GrantFiled: December 20, 2018Date of Patent: February 23, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro Mura, Shinsuke Kikuta, Toshihiro Tsuda, Tetsuo Yoshimitsu
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Patent number: 10928347Abstract: This electrical tree test method is a method for testing for electrical trees in an insulating member including a mica insulation applied to an electrical conductor. The method comprises: an assembly setting step of setting an electrode setting assembly to the outside of the mica insulation; an impregnation step of impregnating the mica insulation with synthetic resin after the assembly setting step; a removal step of removing components of the electrode setting assembly, except an electrode structure, after the impregnation step; a power supply connecting step of connecting, after the removal step, the electrical conductor and the electrode structure to a power supply in order to apply a voltage between the electrical conductor and the electrode structure; and a voltage applying step of applying a voltage between the electrical conductor and the electrode structure, after the power supply connecting step.Type: GrantFiled: June 14, 2018Date of Patent: February 23, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro Mura, Tetsuo Yoshimitsu, Toshihiro Tsuda
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Patent number: 10903710Abstract: A producing method for an electrical insulating structure that covers an outer surface of a to-be-insulated object is provided. The method comprises: a taping step of winding a main insulation tape on outside of the to-be-insulated object; a spraying step of spraying nanoparticles onto the outer surface of the wound main insulation tape; a vacuum drawing step of vacuum drawing the tape-wound to-be-insulated object; and an impregnation step of injecting a nanoparticle-containing impregnating macromolecular polymer in which nanoparticles have been kneaded to impregnate the to-be-insulated object therewith. In the spraying step, microcapsules, which contain the nanoparticles and are able to release the nanoparticles before the impregnation step, are sprayed.Type: GrantFiled: December 20, 2018Date of Patent: January 26, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro Mura, Kodai Ushiwata, Toshihiro Tsuda, Tetsuo Yoshimitsu
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Publication number: 20190149008Abstract: A producing method for an electrical insulating structure that covers an outer surface of a to-be-insulated object, comprises: a taping step in which a main insulation tape is wound on the outside of the to-be-insulated object to forma main insulated part; a vacuum drawing step in which the tape-wound to-be-insulated object is subjected to vacuum drawing, after the taping step; and an impregnation step in which a nanoparticle-containing impregnating macromolecular polymer, in which nanoparticles have been kneaded, is injected to impregnate the main insulated part therewith, after the vacuum drawing step.Type: ApplicationFiled: December 20, 2018Publication date: May 16, 2019Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro MURA, Shinsuke KIKUTA, Toshihiro TSUDA, Tetsuo YOSHIMITSU
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Publication number: 20190149009Abstract: A producing method is for an electrical insulating structure covering an outer surface of a to-be-insulated object. The electrical insulating structure producing method comprises: a sheet production step of producing a main insulating sheet in which nanoparticles have been mixed; a cutting step in which the main insulating sheet is cut into main insulation tapes; a taping step of winding each of main insulation tapes on outside of the to-be-insulated object to produce a tape-wound to-be-insulated object in which a main insulated part is formed; a vacuum drawing step of vacuum drawing the tape-wound to-be-insulated object; an impregnation step of injecting a impregnating macromolecular polymer to impregnate the main insulated part in the tape-wound to-be-insulated object, and a solidifying step of raising the temperature of the insulated part to solidify the macromolecular polymer containing the nanoparticles.Type: ApplicationFiled: December 20, 2018Publication date: May 16, 2019Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro MURA, Shinsuke KIKUTA, Toshihiro TSUDA, Tetsuo YOSHIMITSU
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Publication number: 20190149010Abstract: A producing method is for an electrical insulating structure to cover an outer surface of a to-be-insulated object. The method comprises: a tape production step of producing a main insulation tape by using a nanoparticle-containing joining macromolecular polymer; a taping step of winding a main insulation tape on outside of the to-be-insulated object to form a main insulated part; a vacuum drawing step, which is performed after the taping step, of vacuum drawing the tape-wound to-be-insulated object; and an impregnation step, which is performed after the vacuum drawing step, of injecting a impregnating macromolecular polymer to impregnate the main insulated part therewith.Type: ApplicationFiled: December 20, 2018Publication date: May 16, 2019Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro Mura, Shinsuke Kikuta, Toshihiro Tsuda, Tetsuo Yoshimitsu
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Publication number: 20190149007Abstract: A producing method for an electrical insulating structure that covers an outer surface of a to-be-insulated object is provided. The method comprises: a taping step of winding a main insulation tape on outside of the to-be-insulated object; a spraying step of spraying nanoparticles onto the outer surface of the wound main insulation tape; a vacuum drawing step of vacuum drawing the tape-wound to-be-insulated object; and an impregnation step of injecting a nanoparticle-containing impregnating macromolecular polymer in which nanoparticles have been kneaded to impregnate the to-be-insulated object therewith. In the spraying step, microcapsules, which contain the nanoparticles and are able to release the nanoparticles before the impregnation step, are sprayed.Type: ApplicationFiled: December 20, 2018Publication date: May 16, 2019Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro MURA, Kodai USHIWATA, Toshihiro TSUDA, Tetsuo YOSHIMITSU
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Publication number: 20190149006Abstract: A method for producing a corona discharge-preventing structure for covering the outer surface of a to-be-insulated object is presented. The method comprises: a tape producing step of producing a corona discharge-preventing tape including a macromolecular polymer added with electrically conductive powders and non-electrically conductive nanoparticles; a main insulating step of winding a main insulating tape around the to-be-insulated object; and a winding step of winding the corona discharge-preventing tape around the outer surface of the to-be-insulated object around which the main insulating tape has been wound.Type: ApplicationFiled: December 20, 2018Publication date: May 16, 2019Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro MURA, Masahiro TAKENO, Toshihiro TSUDA, Tetsuo YOSHIMITSU
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Publication number: 20180292342Abstract: This electrical tree test method is a method for testing for electrical trees in an insulating member including a mica insulation applied to an electrical conductor. The method comprises: an assembly setting step of setting an electrode setting assembly to the outside of the mica insulation; an impregnation step of impregnating the mica insulation with synthetic resin after the assembly setting step; a removal step of removing components of the electrode setting assembly, except an electrode structure, after the impregnation step; a power supply connecting step of connecting, after the removal step, the electrical conductor and the electrode structure to a power supply in order to apply a voltage between the electrical conductor and the electrode structure; and a voltage applying step of applying a voltage between the electrical conductor and the electrode structure, after the power supply connecting step.Type: ApplicationFiled: June 14, 2018Publication date: October 11, 2018Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kotaro MURA, Tetsuo YOSHIMITSU, Toshihiro TSUDA