Patents by Inventor Masanao Kuwabara

Masanao Kuwabara 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).

  • Publication number: 20170103843
    Abstract: Disclosed is a wound iron core (3) for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core (3) is configured by using two or more kinds of magnetic materials (11 to 14) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material (14) with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials (11) with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core.
    Type: Application
    Filed: December 22, 2016
    Publication date: April 13, 2017
    Inventors: Kenji NAKANOUE, Kazuyuki FUKUI, Hidemasa YAMAGUCHI, Kouhei SATOU, Tatsuhito AZEGAMI, Makoto SHINOHARA, Toshiaki TAKAHASHI, Tooru HONMA, Masanao KUWABARA, Toshiki SHIRAHATA, Yuuji SATOU, Manabu DOHI, Ryosuke MIKOSHIBA, Hiroyuki ENDOU
  • Patent number: 9601256
    Abstract: Disclosed is a wound iron core (3) for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core (3) is configured by using two or more kinds of magnetic materials (11 to 14) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material (14) with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials (11) with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: March 21, 2017
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Kenji Nakanoue, Kazuyuki Fukui, Hidemasa Yamaguchi, Kouhei Satou, Tatsuhito Azegami, Makoto Shinohara, Toshiaki Takahashi, Tooru Honma, Masanao Kuwabara, Toshiki Shirahata, Yuuji Satou, Manabu Dohi, Ryosuke Mikoshiba, Hiroyuki Endou
  • Patent number: 9013263
    Abstract: Disclosed is a wound iron core (3) for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core (3) is configured by using two or more kinds of magnetic materials (11 to 14) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material (14) with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials (11) with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: April 21, 2015
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kenji Nakanoue, Kazuyuki Fukui, Hidemasa Yamaguchi, Kouhei Satou, Tatsuhito Azegami, Makoto Shinohara, Toshiaki Takahashi, Tooru Honma, Masanao Kuwabara, Toshiki Shirahata, Yuuji Satou, Manabu Dohi, Ryosuke Mikoshiba, Hiroyuki Endou
  • Publication number: 20150028977
    Abstract: Disclosed is a wound iron core (3) for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core (3) is configured by using two or more kinds of magnetic materials (11 to 14) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material (14) with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials (11) with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core.
    Type: Application
    Filed: October 10, 2014
    Publication date: January 29, 2015
    Inventors: Kenji NAKANOUE, Kazuyuki FUKUI, Hidemasa YAMAGUCHI, Kouhei SATOU, Tatsuhito AZEGAMI, Makoto SHINOHARA, Toshiaki TAKAHASHI, Tooru HONMA, Masanao KUWABARA, Toshiki SHIRAHATA, Yuuji SATOU, Manabu DOHI, Ryosuke MIKOSHIBA, Hiroyuki ENDOU
  • Patent number: 8258912
    Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: September 4, 2012
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiroyuki Endou, Makoto Shinohara, Masanao Kuwabara, Yoichi Amako, Toshiki Shirahata
  • Publication number: 20110234360
    Abstract: Disclosed is a wound iron core (3) for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core (3) is configured by using two or more kinds of magnetic materials (11 to 14) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material (14) with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials (11) with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core.
    Type: Application
    Filed: August 26, 2009
    Publication date: September 29, 2011
    Inventors: Kenji Nakanoue, Kazuyuki Fukui, Hidemasa Yamaguchi, Kouhei Satou, Tatsuhito Azegami, Makoto Shinohara, Toshiaki Takahashi, Tooru Honma, Masanao Kuwabara, Toshiki Shirahata, Yuuji Satou, Manabu Dohi, Ryosuke Mikoshiba, Hiroyuki Endou
  • Publication number: 20100066476
    Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.
    Type: Application
    Filed: November 25, 2009
    Publication date: March 18, 2010
    Inventors: Hiroyuki Endou, Makoto Shinohara, Masanao Kuwabara, Yoichi Amako, Toshiki Shirahata
  • Patent number: 7675398
    Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: March 9, 2010
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiroyuki Endou, Makoto Shinohara, Masanao Kuwabara, Yoichi Amako, Toshiki Shirahata
  • Publication number: 20080272876
    Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.
    Type: Application
    Filed: July 7, 2006
    Publication date: November 6, 2008
    Inventors: Hiroyuki Endou, Makoto Shinohara, Masanao Kuwabara, Yoichi Amako, Toshiki Shirahata
  • Patent number: 6769169
    Abstract: To provide a technology capable of restraining direct current magnetic deviation in a transformer without providing a gap in a core, an axis of easy magnetization is provided in a second direction intersecting with a first direction along a magnetic circuit of the core to thereby bring a B-H characteristic of a material characteristic of the core into an unsaturated state.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: August 3, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Akira Nishimizu, Hideki Masuhara, Youichi Amako, Masanao Kuwabara
  • Patent number: 6611191
    Abstract: To provide a technology capable of restraining direct current magnetic deviation in a transformer without providing a gap in a core, an axis of easy magnetization is provided in a second direction intersecting with a first direction along a magnetic circuit of the core to thereby bring a B-H characteristic of a material characteristic of the core into an unsaturated state.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: August 26, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Akira Nishimizu, Hideki Masuhara, Youichi Amako, Masanao Kuwabara
  • Publication number: 20030137386
    Abstract: To provide a technology capable of restraining direct current magnetic deviation in a transformer without providing a gap in a core, an axis of easy magnetization is provided in a second direction intersecting with a first direction along a magnetic circuit of the core to thereby bring a B-H characteristic of a material characteristic of the core into an unsaturated state.
    Type: Application
    Filed: February 7, 2003
    Publication date: July 24, 2003
    Inventors: Akira Nishimizu, Hideki Masuhara, Youichi Amako, Masanao Kuwabara
  • Publication number: 20020101321
    Abstract: To provide a technology capable of restraining direct current magnetic deviation in a transformer without providing a gap in a core, an axis of easy magnetization is provided in a second direction intersecting with a first direction along a magnetic circuit of the core to thereby bring a B-H characteristic of a material characteristic of the core into an unsaturated state.
    Type: Application
    Filed: July 20, 2001
    Publication date: August 1, 2002
    Inventors: Akira Nishimizu, Hideki Masuhara, Youichi Amako, Masanao Kuwabara