Patents by Inventor Akihito Ootani
Akihito Ootani 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: 8958923Abstract: A distributed power supply system is configured to execute a process for determining whether or not to permit a diagnostic process in such a manner that it is determined whether or not a difference between a set upper limit value and an actual measurement current value is not less than a load current value, the set upper limit value being a predetermined upper limit value set with respect to a detected current of a current sensor, the measurement current value being detected by the current sensor in a state where the diagnostic process is not executed, and the load current value being a value of a current flowing from a commercial power utility to a power load during execution of the diagnostic process; and if it is determined that the difference is not less than the load current value, the controller permits the diagnostic process.Type: GrantFiled: August 1, 2011Date of Patent: February 17, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Nin Kake, Shinji Miyauchi, Hiroaki Kaku, Keiichi Sato, Hiroshi Nagasato, Akihito Ootani, Toru Kushisaka, Motomichi Katou, Manabu Takahashi
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Patent number: 8751055Abstract: A distributed power supply system of the present invention comprises a distributed power supply apparatus (4) for supplying electric power to a customer load (2) interactively with a commercial electric power utility (1); an internal load (7) supplied with electric power from the commercial electric power utility; a current sensor (5a, 5b) for detecting a magnitude of a current and a direction of the current, the current being in a location closer to the commercial electric power utility than the internal load and the customer load; and a controller (8); wherein in a state where the distributed power supply apparatus 84) is not generating the electric power, the controller causes the internal load (7) to actuate, performs determination control as to an installation state of the current sensor (5a, 5b) plural times based on a value detected by the current sensor, and performs the determination control in such a manner that at least one of plural intervals at which the determination control is performed is setType: GrantFiled: December 10, 2010Date of Patent: June 10, 2014Assignee: Panasonic CorporationInventors: Nin Kake, Hiroaki Kaku, Keiichi Sato, Hiroshi Nagasato, Akihito Ootani
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Patent number: 8625318Abstract: A power converter of the present invention is configured to convert DC power generated by a power generator (1) into AC power. The power converter includes: a boost converter circuit (3) configured to boost an output voltage of the power generator (1); an inverter circuit (5) configured to convert an output voltage of the boost converter circuit (3) into AC power and to interconnect the AC power with a power system (2); a buck converter circuit (8) configured to perform power conversion of output power of the boost converter circuit (3) and to supply resultant power to an internal load (60); and a controller (9). The controller (9) is configured to control the output voltage of the boost converter circuit (3) to be lower than or equal to a second voltage value which is less than the maximum value of AC voltage of the power system (2), in a case of supplying output power of the power generator (1) to the internal load (60) via the boost converter circuit (3) and the buck converter circuit (8).Type: GrantFiled: February 9, 2011Date of Patent: January 7, 2014Assignee: Panasonic CorporationInventors: Nin Kake, Keiichi Sato, Hiroaki Kaku, Hiroshi Nagasato, Akihito Ootani, Toru Kushisaka
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Publication number: 20130108938Abstract: A power converter of the present invention is configured to convert DC power generated by a power generator (1) into AC power. The power converter includes: a boost converter circuit (3) configured to boost an output voltage of the power generator (1); an inverter circuit (5) configured to convert an output voltage of the boost converter circuit (3) into AC power and to interconnect the AC power with a power system (2); a buck converter circuit (8) configured to perform power conversion of output power of the boost converter circuit (3) and to supply resultant power to an internal load (60); and a controller (9). The controller (9) is configured to control the output voltage of the boost converter circuit (3) to be lower than or equal to a second voltage value which is less than the maximum value of AC voltage of the power system (2), in a case of supplying output power of the power generator (1) to the internal load (60) via the boost converter circuit (3) and the buck converter circuit (8).Type: ApplicationFiled: February 9, 2011Publication date: May 2, 2013Applicant: PANASONIC CORPORATIONInventors: Nin Kake, Keiichi Sato, Hiroaki Kaku, Hiroshi Nagasato, Akihito Ootani, Toru Kushisaka
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Publication number: 20120286759Abstract: A distributed power generation system of the present invention is a distributed power generation system connected to a three-wire electric power system including first to third electric wires, the third electric wire being a neutral wire, and includes: an electric power generator (105); a connection mechanism (110) configured to connect any two electric wires among the first to third electric wires (101a to 101c) to an internal electric power load (111); a first current sensor (109a) set so as to detect a current value of the first electric wire (101a); a second current sensor (109b) set so as to detect a current value of the second electric wire (101b); and an operation controller (112) configured to determine the electric wire on which each of the first current sensor (109a) and the second current sensor (109b) is provided and an installing direction of each of the first current sensor (109a) and the second current sensor (109b) by determining whether or not the amount of change in the current value detecteType: ApplicationFiled: January 31, 2011Publication date: November 15, 2012Inventors: Akihito Ootani, Hiroaki Kaku, Hiroshi Nagasato, Nin Kake, Keiichi Sato, Toru Kushisaka
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Publication number: 20120218794Abstract: A distributed power supply system is configured to execute a process for determining whether or not to permit a diagnostic process in such a manner that it is determined whether or not a difference between a set upper limit value and an actual measurement current value is not less than a load current value, the set upper limit value being a predetermined upper limit value set with respect to a detected current of a current sensor, the measurement current value being detected by the current sensor in a state where the diagnostic process is not executed, and the load current value being a value of a current flowing from a commercial power utility to a power load during execution of the diagnostic process; and if it is determined that the difference is not less than the load current value, the controller permits the diagnostic process.Type: ApplicationFiled: August 1, 2011Publication date: August 30, 2012Applicant: PANASONIC CORPORATIONInventors: Nin Kake, Shinji Miyauchi, Hiroaki Kaku, Keiichi Sato, Hiroshi Nagasato, Akihito Ootani, Toru Kushisaka, Motomichi Katou, Manabu Takahashi
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Publication number: 20110313590Abstract: A distributed power supply system of the present invention comprises a distributed power supply apparatus (4) for supplying electric power to a customer load (2) interactively with a commercial electric power utility (1); an internal load (7) supplied with electric power from the commercial electric power utility; a current sensor (5a, 5b) for detecting a magnitude of a current and a direction of the current, the current being in a location closer to the commercial electric power utility than the internal load and the customer load; and a controller (8); wherein in a state where the distributed power supply apparatus 84) is not generating the electric power, the controller causes the internal load (7) to actuate, performs determination control as to an installation state of the current sensor (5a, 5b) plural times based on a value detected by the current sensor, and performs the determination control in such a manner that at least one of plural intervals at which the determination control is performed is setType: ApplicationFiled: December 10, 2010Publication date: December 22, 2011Applicant: PANASONIC CORPORATIONInventors: Nin Kake, Hiroaki Kaku, Keiichi Sato, Hiroshi Nagasato, Akihito Ootani