Patents by Inventor Katsuhiko Horinouchi
Katsuhiko Horinouchi 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: 11962142Abstract: The present disclosure includes: a power generator; and a power line through which power generated by the power generator is transmitted to a load. The power line between the power generator and the load is provided with: a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current; and a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device.Type: GrantFiled: April 16, 2020Date of Patent: April 16, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiko Horinouchi, Katsuki Hotta, Tsuguhiro Takuno
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Patent number: 11848550Abstract: The semiconductor circuit breaker includes a semiconductor switch unit connected to an AC circuit, and a phase control unit that controls conduction and non-conduction of the semiconductor switch unit by the control signal. The phase control unit includes an accident detection unit to detect an accident based on a current detected from the AC circuit, a zero point detection unit to detect a current zero point based on the current detected from the AC circuit, and a control signal output unit to output the control signal for setting the semiconductor switch unit to be non-conductive when the accident detection unit detects the accident or when the zero point detection unit detects the current zero point in response to a command to cut off the current.Type: GrantFiled: July 25, 2018Date of Patent: December 19, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiko Horinouchi, Tsuguhiro Takuno, Tomoko Takasuka, Satoshi Ishikura, Hiroto Yuki
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Publication number: 20230030964Abstract: The present disclosure includes: a power generator; and a power line through which power generated by the power generator is transmitted to a load. The power line between the power generator and the load is provided with: a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current; and a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device.Type: ApplicationFiled: April 16, 2020Publication date: February 2, 2023Applicant: Mitsubishi Electric CorporationInventors: Katsuhiko HORINOUCHI, Katsuki HOTTA, Tsuguhiro TAKUNO
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Patent number: 11233391Abstract: In order to provide a DC interrupting device that does not easily cause erroneous melting of current-limiting fuses at normal times with no fault current, and that can also deliver good current-limiting performance at the time of occurrence of fault current, the DC interrupting device includes: a (k?1)th current path including a (k?1)th current-limiting fuse, where k is an integer of not less than two and not more than N, and N is an integer of not less than two; and a kth current path connected in parallel to the (k?1)th current path and including a kth current-limiting fuse. The inductance value of the inductance component of the kth current path is higher than the inductance value of the inductance component of the (k?1)th current path.Type: GrantFiled: November 9, 2017Date of Patent: January 25, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Motohiro Sato, Katsuhiko Horinouchi, Sho Tokoyoda, Takashi Inagaki
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Publication number: 20210265831Abstract: The semiconductor circuit breaker includes a semiconductor switch unit connected to an AC circuit, and a phase control unit that controls conduction and non-conduction of the semiconductor switch unit by the control signal. The phase control unit includes an accident detection unit to detect an accident based on a current detected from the AC circuit, a zero point detection unit to detect a current zero point based on the current detected from the AC circuit, and a control signal output unit to output the control signal for setting the semiconductor switch unit to be non-conductive when the accident detection unit detects the accident or when the zero point detection unit detects the current zero point in response to a command to cut off the current.Type: ApplicationFiled: July 25, 2018Publication date: August 26, 2021Applicant: Mitsubishi Electric CorporationInventors: Katsuhiko HORINOUCHI, Tsuguhiro TAKUNO, Tomoko TAKASUKA, Satoshi ISHIKURA, Hiroto YUKI
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Patent number: 10910817Abstract: A DC circuit breaker includes: a mechanical switch provided on an electrical path through which a direct current flows; and a semiconductor switch connected in parallel with the mechanical switch. The mechanical switch includes a gas disconnector and a vacuum circuit breaker connected in series. Normally, the direct current flows through the mechanical switch. When interrupting the direct current, the vacuum circuit breaker is made nonconductive to allow the direct current to be commutated to the semiconductor switch, and subsequently the gas disconnector and the semiconductor switch are made nonconductive. A vacuum circuit breaker having a low withstand voltage can be used.Type: GrantFiled: June 5, 2015Date of Patent: February 2, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiko Horinouchi, Motohiro Sato, Kazuki Takahashi, Ryo Kamimae, Sho Tokoyoda
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Publication number: 20200287380Abstract: In order to provide a DC interrupting device that does not easily cause erroneous melting of current-limiting fuses at normal times with no fault current, and that can also deliver good current-limiting performance at the time of occurrence of fault current, the DC interrupting device includes: a (k?1)th current path including a (k?1)th current-limiting fuse, where k is an integer of not less than two and not more than N, and N is an integer of not less than two; and a kth current path connected in parallel to the (k?1)th current path and including a kth current-limiting fuse. The inductance value of the inductance component of the kth current path is higher than the inductance value of the inductance component of the (k?1)th current path.Type: ApplicationFiled: November 9, 2017Publication date: September 10, 2020Applicant: Mitsubishi Electric CorporationInventors: Motohiro SATO, Katsuhiko HORINOUCHI, Sho TOKOYODA, Takashi INAGAKI
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Patent number: 10614982Abstract: A circuit closer includes: a vacuum interrupter in which one of a pair of electrodes oppositely disposed in a vacuum vessel, wherein a gap d between the pair of electrodes always satisfies d>0, and a gap d1 between the pair of electrodes in a state in which closing of a circuit is completed, is shorter than a distance d2 at which insulation between the pair of electrodes is broken down by a charge voltage V of the circuit that is to be closed, and is longer than a distance d3 at which the pair of electrodes are bridged by a deposition of an electrode metal after a closing operation, the deposition resulting from evaporation caused by heat of an arc generated when the circuit is closed.Type: GrantFiled: August 5, 2015Date of Patent: April 7, 2020Assignee: Mitsubishi Electric CorporationInventors: Motohiro Sato, Katsuhiko Horinouchi, Sho Tokoyoda, Daisuke Fujita
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Patent number: 10535984Abstract: A power device, which includes: an energizing conductor; a power generation unit configured to generate power that is induced by a magnetic flux of a current flowing through the energizing conductor; a power device unit configured to use the power generated in the power generation unit as a power source; a short-circuit switch capable of short-circuiting an output from the power generation unit; and a sealed container in which the energizing conductor, the power generation unit and the power device unit are included, and an insulating fluid is enclosed in the sealed container. This power device is provided as a highly reliable power device, which is used in an AC power system and does not induce an excessive voltage in the power generation unit when the power device unit is stopped in the state where the energized state of the energizing conductor is maintained.Type: GrantFiled: November 29, 2016Date of Patent: January 14, 2020Assignee: Mitsubishi Electric CorporationInventors: Motohiro Sato, Katsuhiko Horinouchi, Hirokazu Otani
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Publication number: 20180358790Abstract: A power device is provided, which includes: an energizing conductor; a power generation unit configured to generate power that is induced by a magnetic flux of a current flowing through the energizing conductor; a power device unit configured to use the power generated in the power generation unit as a power source; a short-circuit switch capable of short-circuiting an output from the power generation unit; and a sealed container in which the energizing conductor, the power generation unit and the power device unit are included, and an insulating fluid is enclosed in the sealed container. This power device is provided as a highly reliable power device, which is used in an AC power system and does not induce an excessive voltage in the power generation unit when the power device unit is stopped in the state where the energized state of the energizing conductor is maintained.Type: ApplicationFiled: November 29, 2016Publication date: December 13, 2018Applicant: Mitsubishi Electric CorporationInventors: Motohiro SATO, Katsuhiko HORINOUCHI, Hirokazu OTANI
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Patent number: 9948089Abstract: In a DC circuit breaker device, first and second semiconductor switches are connected in series on a main circuit line such that current-carrying directions of the switches are opposite to each other. A first diode is connected in anti-parallel with the first semiconductor switch, and a second diode is connected in anti-parallel with the second semiconductor switch. First and second mechanical circuit breakers are connected in series with each other and in parallel with the whole of the first and semiconductor switches. First and second backward current generation circuits are connected in series with each other and in parallel with the whole of the first and second mechanical circuit breakers. An injection switch is connected between a node between the first and second mechanical circuit breakers and a node between the first and second backward current generation circuits.Type: GrantFiled: April 11, 2014Date of Patent: April 17, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiko Horinouchi, Motohiro Sato
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Publication number: 20170288388Abstract: A DC circuit breaker includes: a mechanical switch provided on an electrical path through which a direct current flows; and a semiconductor switch connected in parallel with the mechanical switch. The mechanical switch includes a gas disconnector and a vacuum circuit breaker connected in series. Normally, the direct current flows through the mechanical switch. When interrupting the direct current, the vacuum circuit breaker is made nonconductive to allow the direct current to be commutated to the semiconductor switch, and subsequently the gas disconnector and the semiconductor switch are made nonconductive. A vacuum circuit breaker having a low withstand voltage can be used.Type: ApplicationFiled: June 5, 2015Publication date: October 5, 2017Applicant: Mitsubishi Electric CorporationInventors: Katsuhiko HORINOUCHI, Motohiro SATO, Kazuki TAKAHASHI, Ryo KAMIMAE, Sho TOKOYODA
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Publication number: 20170250040Abstract: A circuit closer includes: a vacuum interrupter in which one of a pair of electrodes oppositely disposed in a vacuum vessel, wherein a gap d between the pair of electrodes always satisfies d>0, and a gap d1 between the pair of electrodes in a state in which closing of a circuit is completed, is shorter than a distance d2 at which insulation between the pair of electrodes is broken down by a charge voltage V of the circuit that is to be closed, and is longer than a distance d3 at which the pair of electrodes are bridged by a deposition of an electrode metal after a closing operation, the deposition resulting from evaporation caused by heat of an arc generated when the circuit is closed.Type: ApplicationFiled: August 5, 2015Publication date: August 31, 2017Applicant: Mitsubishi Electric CorporationInventors: Motohiro SATO, Katsuhiko HORINOUCHI, Sho TOKOYODA, Daisuke FUJITA
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Patent number: 9475906Abstract: The present invention relates to an arc-extinguishing insulation material molded product provided in the vicinity of a contact point between contactors in a gas circuit breaker. The arc-extinguishing insulation material molded product includes a polymer which contains a carbon-oxygen bond in the main chain, and in which a part of or all of terminal atoms are non-hydrogen atoms.Type: GrantFiled: September 11, 2013Date of Patent: October 25, 2016Assignee: Mitsubishi Electric CorporationInventors: Kazuki Kubo, Tatsuya Okawa, Katsuhiko Horinouchi, Motohiro Sato
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Patent number: 9441074Abstract: The present invention relates to an arc-extinguishing insulation material molded product provided in the vicinity of a contact point between contactors in a gas circuit breaker. The arc-extinguishing insulation material molded product includes a polymer which contains a carbon-oxygen bond in the main chain, and in which a part of or all of terminal atoms are non-hydrogen atoms.Type: GrantFiled: September 11, 2013Date of Patent: September 13, 2016Assignee: Mitsubishi Electric CorporationInventors: Kazuki Kubo, Tatsuya Okawa, Katsuhiko Horinouchi, Motohiro Sato
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Publication number: 20160204596Abstract: In a DC circuit breaker device, first and second semiconductor switches are connected in series on a main circuit line such that current-carrying directions of the switches are opposite to each other. A first diode is connected in anti-parallel with the first semiconductor switch, and a second diode is connected in anti-parallel with the second semiconductor switch. First and second mechanical circuit breakers are connected in series with each other and in parallel with the whole of the first and semiconductor switches. First and second backward current generation circuits are connected in series with each other and in parallel with the whole of the first and second mechanical circuit breakers. An injection switch is connected between a node between the first and second mechanical circuit breakers and a node between the first and second backward current generation circuits.Type: ApplicationFiled: April 11, 2014Publication date: July 14, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiko HORINOUCHI, Motohiro SATO
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Patent number: 9230759Abstract: A gas circuit breaker includes: a pair of electrodes provided so as to be able to come in contact with and separate from each other; and an insulating material that is placed so as to generate a decomposition gas in response to a direct or indirect action from an arc occurring between the pair of electrodes when a current is broken, wherein the decomposition gas generated from the insulating material when the current is broken is configured to be utilized for extinguishing the arc, and wherein an ablative material that does not include hydrogen atoms but has a carbon-oxygen bond in a main chain or ring part is used as the insulating material.Type: GrantFiled: October 11, 2012Date of Patent: January 5, 2016Assignee: Mitsubishi Electric CorporationInventors: Katsuhiko Horinouchi, Motohiro Sato, Kazuki Kubo, Yuhei Awano
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Publication number: 20150357137Abstract: The present invention relates to an arc-extinguishing insulation material molded product provided in the vicinity of a contact point between contactors in a gas circuit breaker. The arc-extinguishing insulation material molded product includes a polymer which contains a carbon-oxygen bond in the main chain, and in which a part of or all of terminal atoms are non-hydrogen atoms.Type: ApplicationFiled: September 11, 2013Publication date: December 10, 2015Applicant: Mitsubishi Electric CorporationInventors: Kazuki KUBO, Tatsuya OKAWA, Katsuhiko HORINOUCHI, Motohiro SATO
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Patent number: 9147543Abstract: An arc extinguishing device of a gas circuit breaker includes: an arc chamber in which an arc generated between a movable electrode and a fixed electrode is formed; a heat puffer chamber disposed so as to surround the arc chamber; a blow port in which the arc chamber communicates with the heat puffer chamber in the circumferential direction of the arc chamber; hydrogen absorbents which are disposed on an inner wall of a pressure chamber; an exhaust port which passes to the outside of an arc extinguishing chamber; and a hydrogen absorbent disposed at a position surrounding the movable electrode. Deterioration of insulation due to a product formed by decomposition of arc extinguishing gas by the arc during a contact opening operation can be suppressed.Type: GrantFiled: November 4, 2011Date of Patent: September 29, 2015Assignee: Mitsubishi Electric CorporationInventors: Katsuhiko Horinouchi, Motohiro Sato
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Patent number: 9144161Abstract: A bus is placed at the center of a housing. Breakers and cables forming branch circuits branching from the bus are placed at the upper and lower stages in the housing, being displaced in the right-left direction. Spaces formed between the side wall of the housing and the side walls of an upper-stage breaker compartment and an upper-stage cable compartment containing the upper-stage apparatuses are used as paths leading to the housing ceiling for a bus compartment, and a lower-stage breaker compartment and a lower-stage cable compartment containing the lower-stage apparatuses. The bus compartment and all the apparatus compartments each directly lead to a ceiling portion of the housing and have an opening portion. Pressure discharge plates are provided on the opening portions.Type: GrantFiled: September 26, 2011Date of Patent: September 22, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Susumu Kozuru, Katsuhiko Horinouchi