Patents by Inventor Yasuhiro SHINOMIYA
Yasuhiro SHINOMIYA 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: 10734916Abstract: A power converter is electrically connected with an AC power supply via a switch, and is configured with a plurality of unit converters (5) connected in series. A drive circuit (40, 42) drives a plurality of switching elements (11 to 14) of a main circuit (30). An interface circuit (48) outputs a detection value of a voltage sensor (46) to a control device (4). If a bypass switch (7) is turned off when the power converter is activated, each of the plurality of unit converters (5) charges a capacitor (15) using power supplied from the AC power supply. When the power converter is activated, a power supply (50) supplies a power supply voltage to the voltage sensor (46) and the interface circuit (48), prior to the drive circuit (40, 42). The control device (4) turns off the switch when the detection value of the voltage sensor (46) of at least one of the plurality of unit converters (5) is more than or equal to a predetermined value.Type: GrantFiled: April 21, 2017Date of Patent: August 4, 2020Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuhiro Shinomiya, Ryota Okuyama, Taichiro Tsuchiya
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Publication number: 20200119659Abstract: A power converter is electrically connected with an AC power supply via a switch, and is configured with a plurality of unit converters (5) connected in series. A drive circuit (40, 42) drives a plurality of switching elements (11 to 14) of a main circuit (30). An interface circuit (48) outputs a detection value of a voltage sensor (46) to a control device (4). If a bypass switch (7) is turned off when the power converter is activated, each of the plurality of unit converters (5) charges a capacitor (15) using power supplied from the AC power supply. When the power converter is activated, a power supply (50) supplies a power supply voltage to the voltage sensor (46) and the interface circuit (48), prior to the drive circuit (40, 42). The control device (4) turns off the switch when the detection value of the voltage sensor (46) of at least one of the plurality of unit converters (5) is more than or equal to a predetermined value.Type: ApplicationFiled: April 21, 2017Publication date: April 16, 2020Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuhiro SHINOMIYA, Ryota OKUYAMA, Taichiro TSUCHIYA
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Patent number: 10186952Abstract: A power conversion device in which a plurality of converter cells are connected in series with one another. The converter cells each include two or more semiconductor devices, an energy storage element and a bypass element including a constituent element for setting the bypass element to be close-circuited by detecting abnormality of a converter cell, and including a constituent element for controlling, among the semiconductor devices, a semiconductor device connected in parallel with the bypass element to set in a turn-on state, at the same time when the bypass element is set close-circuited or in advance of its close circuit.Type: GrantFiled: February 26, 2015Date of Patent: January 22, 2019Assignees: Mitsubishi Electric Corporation, TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Takushi Jimichi, Kimiyuki Koyanagi, Sadao Funahashi, Taichiro Tsuchiya, Yasuhiro Shinomiya
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Patent number: 9866120Abstract: A power conversion device including: an energy storage unit which receives and stores voltage of a self-power-feeding device; and a bypass unit drive device which, when voltage of the self-power-feeding device becomes smaller than a predetermined lower limit value, causes a bypass unit to perform short-circuiting operation by power stored in the energy storage unit. Thus, by appropriately setting the above voltage lower limit value as a threshold value for the short-circuiting operation, it becomes possible to swiftly and reliably perform short-circuiting protection operation even if a cell converter has failed, thus it is possible to always safely continue the operation of the power conversion device.Type: GrantFiled: April 21, 2015Date of Patent: January 9, 2018Assignees: Mitsubishi Electric Corporation, TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kimiyuki Koyanagi, Takushi Jimichi, Yasuhiro Shinomiya, Taichiro Tsuchiya
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Publication number: 20170126127Abstract: A power conversion device including: an energy storage unit which receives and stores voltage of a self-power-feeding device; and a bypass unit drive device which, when voltage of the self-power-feeding device becomes smaller than a predetermined lower limit value, causes a bypass unit to perform short-circuiting operation by power stored in the energy storage unit. Thus, by appropriately setting the above voltage lower limit value as a threshold value for the short-circuiting operation, it becomes possible to swiftly and reliably perform short-circuiting protection operation even if a cell converter has failed, thus it is possible to always safely continue the operation of the power conversion device.Type: ApplicationFiled: April 21, 2015Publication date: May 4, 2017Applicants: MITSUBISHI ELECTRIC CORPORATION, TOSHIBA MITSUBISH-ELECTRIC INDUSTIAL SYSTEMS CORPORATIONInventors: Kimiyuki KOYANAGI, Takushi JIMICHI, Yasuhiro SHINOMIYA, Taichiro TSUCHIYA
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Publication number: 20170012521Abstract: A power conversion device in which a plurality of converter cells are connected in series with one another. The converter cells each include two or more semiconductor devices, an energy storage element and a bypass element including a constituent element for setting the bypass element to be close-circuited by detecting abnormality of a converter cell, and including a constituent element for controlling, among the semiconductor devices, a semiconductor device connected in parallel with the bypass element to set in a turn-on state, at the same time when the bypass element is set close-circuited or in advance of its close circuit.Type: ApplicationFiled: February 26, 2015Publication date: January 12, 2017Applicants: MITSUBISHI ELECTRIC CORPORATION, TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMSInventors: Takushi JIMICHI, Kimiyuki KOYANAGI, Sadao FUNAHASHI, Taichiro TSUCHIYA, Yasuhiro SHINOMIYA