Patents by Inventor Akito Tanaka
Akito Tanaka 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: 20240128887Abstract: A first voltage control circuitry controls a first representative value, i.e., an average-value corresponding value of DC capacitor voltages of all converter cells to follow an overall voltage command value. A phase balance control circuitry controls second representative values, i.e., average-value corresponding values of DC capacitor voltages of the converter cells in leg circuits for respective phases to follow the first representative value. A positive-negative balance control circuitry controls deviations of third representative values, i.e., average-value corresponding values of the DC capacitor voltages of the converter cells in the positive and negative arms of the leg circuits for respective phases to become zero between the positive and negative arms. An individual balance control circuitry controls DC capacitor voltages of all the converter cells to follow the third representative values.Type: ApplicationFiled: April 5, 2021Publication date: April 18, 2024Applicant: Mitsubishi Electric CorporationInventors: Miwako TANAKA, Toshiyuki FUJII, Takuya KAJIYAMA, Akito NAKAYAMA
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Patent number: 11070142Abstract: A power conversion device includes a single-phase full-wave rectifying unit, an electrolytic capacitor, a plurality of chopper circuits that are arranged between the single-phase full-wave rectifying unit and the electrolytic capacitor, each of the chopper circuits including a reactor, a first MOSFET connected in parallel with the single-phase full-wave rectifying unit, and a second MOSFET connected to a positive terminal of the electrolytic capacitor at one end and to the reactor and the first MOSFET at the other end, a first current detecting unit to bidirectionally detect a current flowing through the reactor, and a control unit to control an operation of the first MOSFET by using the detection result from the first current detecting unit.Type: GrantFiled: November 15, 2017Date of Patent: July 20, 2021Assignee: Mitsubishi Electric CorporationInventors: Satoru Ichiki, Akito Tanaka, Shunsuke Kubota
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Publication number: 20200403526Abstract: A power conversion device includes a single-phase full-wave rectifying unit, an electrolytic capacitor, a plurality of chopper circuits that are arranged between the single-phase full-wave rectifying unit and the electrolytic capacitor, each of the chopper circuits including a reactor, a first MOSFET connected in parallel with the single-phase full-wave rectifying unit, and a second MOSFET connected to a positive terminal of the electrolytic capacitor at one end and to the reactor and the first MOSFET at the other end, a first current detecting unit to bidirectionally detect a current flowing through the reactor, and a control unit to control an operation of the first MOSFET by using the detection result from the first current detecting unit.Type: ApplicationFiled: November 15, 2017Publication date: December 24, 2020Inventors: Satoru ICHIKI, Akito TANAKA, Shunsuke KUBOTA
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Patent number: 10734900Abstract: A converter device includes a rectifier circuit to rectify an AC voltage output from an AC power supply, a booster circuit including a plurality of reactors, a plurality of switching elements, and a plurality of backflow prevention elements to boost an output voltage of the rectifier circuit, a smoothing capacitor to smooth an output voltage of the booster circuit, a bus-current detection circuit to detect a value of a current that flows between the rectifier circuit and the booster circuit, a first filter circuit having a first filter time constant, a second filter circuit having a second filter time constant shorter than the first filter time constant, and a control unit to control an operation of the switching elements as a current value detected by the bus-current detection circuit is input to the control unit via the first filter circuit and the second filter circuit.Type: GrantFiled: December 28, 2016Date of Patent: August 4, 2020Assignee: Mitsubishi Electric CorporationInventors: Akito Tanaka, Satoru Ichiki, Tomohiro Kutsuki, Daisuke Suzuki, Akira Sakai
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Patent number: 10693377Abstract: The converter device includes a rectification circuit that receives, as an input, AC power from an AC power supply, and performs full-wave rectification on the AC power received, a booster circuit that boosts an output voltage from the rectification circuit, a smoothing capacitor that smooths an output voltage from the booster circuit, and outputs a voltage smoothed, to the load, and a controller that controls the booster circuit. The booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a reverse-blocking diode. The controller maintains, in an ON state, the switching element included in at least one of the plurality of booster sections for a predetermined time period to determine the presence or absence of a fault of the booster section.Type: GrantFiled: February 24, 2016Date of Patent: June 23, 2020Assignee: Mitsubishi Electric CorporationInventors: Tomohiro Kutsuki, Akira Sakai, Daisuke Suzuki, Satoru Ichiki, Akito Tanaka
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Publication number: 20190312510Abstract: A converter device includes a rectifier circuit to rectify an AC voltage output from an AC power supply, a booster circuit including a plurality of reactors, a plurality of switching elements, and a plurality of backflow prevention elements to boost an output voltage of the rectifier circuit, a smoothing capacitor to smooth an output voltage of the booster circuit, a bus-current detection circuit to detect a value of a current that flows between the rectifier circuit and the booster circuit, a first filter circuit having a first filter time constant, a second filter circuit having a second filter time constant shorter than the first filter time constant, and a control unit to control an operation of the switching elements as a current value detected by the bus-current detection circuit is input to the control unit via the first filter circuit and the second filter circuit.Type: ApplicationFiled: December 28, 2016Publication date: October 10, 2019Inventors: Akito TANAKA, Satoru ICHIKI, Tomohiro KUTSUKI, Daisuke SUZUKI, Akira SAKAI
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Publication number: 20190173384Abstract: The converter device includes a rectification circuit that receives, as an input, AC power from an AC power supply, and performs full-wave rectification on the AC power received, a booster circuit that boosts an output voltage from the rectification circuit, a smoothing capacitor that smooths an output voltage from the booster circuit, and outputs a voltage smoothed, to the load, and a controller that controls the booster circuit. The booster circuit includes a plurality of booster sections each of which includes a reactor, a switching element, and a reverse-blocking diode. The controller maintains, in an ON state, the switching element included in at least one of the plurality of booster sections for a predetermined time period to determine the presence or absence of a fault of the booster section.Type: ApplicationFiled: February 24, 2016Publication date: June 6, 2019Inventors: Tomohiro KUTSUKI, Akira SAKAI, Daisuke SUZUKI, Satoru ICHIKI, Akito TANAKA
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Patent number: 10084383Abstract: A booster device includes a shunt resistor with one end thereof being connected to a common bus on a low potential side and a plurality of booster circuits that are connected to one another in parallel and are connected between the other end of the shunt resistor and an input bus on a high potential side. The booster device can suppress its cost and mounting area.Type: GrantFiled: March 27, 2015Date of Patent: September 25, 2018Assignee: Mitsubishi Electric CorporationInventor: Akito Tanaka
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Patent number: 9987208Abstract: 8-[2-(2-Pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid (DCP-LA) has an action to promote synthesis and regeneration of elastin, and is useful as an agent for the prophylaxis or improvement of wrinkles, and an anti-aging drug.Type: GrantFiled: April 4, 2014Date of Patent: June 5, 2018Assignee: Nishizaki Bioinformation Research InstituteInventors: Tomoyuki Nishizaki, Akito Tanaka
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Publication number: 20170353109Abstract: A booster device includes a shunt resistor with one end thereof being connected to a common bus on a low potential side and a plurality of booster circuits that are connected to one another in parallel and are connected between the other end of the shunt resistor and an input bus on a high potential side. The booster device can suppress its cost and mounting area.Type: ApplicationFiled: March 27, 2015Publication date: December 7, 2017Inventor: Akito TANAKA
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Patent number: 9603821Abstract: 8-[2-(2-pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid has a protein tyrosine phosphatase 1B (PTP1B) inhibitory action, an Akt activating action, a GSK-3? phosphorylation promoting action, and a suppressive action on ? protein phosphorylation induced by A?1-42, and is useful as a therapeutic drug for Alzheimer-type dementia, an antidepressant and/or an anti-aging drug.Type: GrantFiled: February 21, 2014Date of Patent: March 28, 2017Assignee: Nishizaki Bioinformation Research InstituteInventors: Tomoyuki Nishizaki, Akito Tanaka
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Patent number: 9512152Abstract: The invention provides a phospholipid compound containing unsaturated fatty acid having a cyclopropane ring such as 8-[2-(2-pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid (DCP-LA) and 8-(2-octylcyclopropyl)octanoic acid (DCP-OA) and the like, particularly 1,2-o-bis-[8-{2-(2-pentyl-cyclopropylmethyl)-cyclopropyl}-octanoyl]-sn-glycero-3-phosphatidylethanolamine (diDCP-LA-PE), which has a cognitive function improving effect and an anti-diabetes action, and which is useful as a medicine such as a therapeutic drug for dementia, a therapeutic drug for diabetes and the like.Type: GrantFiled: February 14, 2014Date of Patent: December 6, 2016Assignee: Nishizaki Bioinformation Research InstituteInventors: Tomoyuki Nishizaki, Akito Tanaka
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Publication number: 20160120888Abstract: An anti-cancer agent and a cancer cell death inducing agent, containing an inositol phospholipid compound, particularly 1,2-O-bis-[8-{2-(2-pentyl-cyclopropylmethyl)-cyclopropyl}-octanoyl]-sn-glycerol-3-phosphatidyl-inositol, as an active ingredient.Type: ApplicationFiled: June 6, 2014Publication date: May 5, 2016Inventors: Tomoyuki NISHIZAKI, Takashi NAKANO, Akito TANAKA, Tadashi SHIMIZU, Takeshi KANNO
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Publication number: 20160089352Abstract: Provided is a cellular membrane trafficking promoter for a 5-HT1A serotonin receptor and the like. A cellular membrane trafficking promoter for a 5-HT1A serotonin receptor containing 8-[2-(2-pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid as an active ingredient, and the like.Type: ApplicationFiled: May 15, 2014Publication date: March 31, 2016Inventors: Tomoyuki Nishizaki, Akito Tanaka
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Patent number: 9272980Abstract: The present invention aims to provide a compound having an anticancer action comparable or superior to that of naftopidil. A compound represented by the formula (I) wherein each symbol is as defined in the SPECIFICATION, or a pharmaceutically acceptable salt thereof, particularly 1-((2-((2-methoxyphenyl)amino)ethyl)amino)-3-(1-naphthyloxy)propan-2-ol, or a pharmaceutically acceptable salt thereof. The compound shows a cell proliferation suppressive action on a wide range of cancer cells, is useful as an anti-cancer agent, and is useful for the prophylaxis and/or treatment of cancer.Type: GrantFiled: June 6, 2014Date of Patent: March 1, 2016Assignee: KTN BioTec, Inc.Inventors: Takeshi Kanno, Akito Tanaka, Tadashi Shimizu, Takashi Nakano, Tomoyuki Nishizaki
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Publication number: 20160045415Abstract: 8-[2-(2-Pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid (DCP-LA) has an action to promote synthesis and regeneration of elastin, and is useful as an agent for the prophylaxis or improvement of wrinkles, and an anti-aging drug.Type: ApplicationFiled: April 4, 2014Publication date: February 18, 2016Inventors: Tomoyuki NISHIZAKI, Akito TANAKA
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Publication number: 20160008308Abstract: 8-[2-(2-pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid has a protein tyrosine phosphatase 1B (PTP1B) inhibitory action, an Akt activating action, a GSK-3? phosphorylation promoting action, and a suppressive action on ? protein phosphorylation induced by A?1-42, and is useful as a therapeutic drug for Alzheimer-type dementia, an antidepressant and/or an anti-aging drug.Type: ApplicationFiled: February 21, 2014Publication date: January 14, 2016Applicant: NISHIZAKI BIOINFORMATION RESEARCH INSTITUTEInventors: Tomoyuki NISHIZAKI, Akito TANAKA
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Publication number: 20150376213Abstract: The invention provides a phospholipid compound containing unsaturated fatty acid having a cyclopropane ring such as 8-[2-(2-pentyl-cyclopropylmethyl)-cyclopropyl]-octanoic acid (DCP-LA) and 8-(2-octylcyclopropyl)octanoic acid (DCP-OA) and the like, particularly 1,2-o-bis-[8-{2-(2-pentyl-cyclopropylmethyl)-cyclopropyl}-octanoyl]-sn-glycero-3-phosphatidylethanolamine (diDCP-LA-PE), which has a cognitive function improving effect and an anti-diabetes action, and which is useful as a medicine such as a therapeutic drug for dementia, a therapeutic drug for diabetes and the like.Type: ApplicationFiled: February 14, 2014Publication date: December 31, 2015Inventors: Tomoyuki NISHIZAKI, Akito TANAKA
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Patent number: 9212169Abstract: The present invention aims to provide a compound capable of inhibiting PCA-1 that can be a target for a novel treatment method of various diseases, and pharmaceutical use of the compound. A compound represented by the formula (I): wherein each symbol is as defined in the DESCRIPTION, or a pharmaceutically acceptable salt thereof.Type: GrantFiled: March 1, 2013Date of Patent: December 15, 2015Assignees: HYOGO COLLEGE OF MEDICINE, KAGOSHIMA UNIVERSITY, OSAKA UNIVERSITYInventors: Kazutake Tsujikawa, Akito Tanaka, Shunji Aoki, Hiroaki Mizuno, Miyuki Tokoro, Tatsuhiko Furukawa
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Publication number: 20150353473Abstract: The present invention aims to provide a compound having an anticancer action comparable or superior to that of naftopidil. A compound represented by the formula (I) wherein each symbol is as defined in the SPECIFICATION, or a pharmaceutically acceptable salt thereof, particularly 1-((2-((2-methoxyphenyl)amino)ethyl)amino)-3-(1-naphthyloxy)propan-2-ol, or a pharmaceutically acceptable salt thereof. The compound shows a cell proliferation suppressive action on a wide range of cancer cells, is useful as an anti-cancer agent, and is useful for the prophylaxis and/or treatment of cancer.Type: ApplicationFiled: June 6, 2014Publication date: December 10, 2015Inventors: Takeshi KANNO, Akito TANAKA, Tadashi SHIMIZU, Takashi NAKANO, Tomoyuki NISHIZAKI