Patents by Inventor Osamu Ohashi
Osamu Ohashi 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: 9905351Abstract: A power supply apparatus capable of appropriately supplying electrical power to a power transmission coil even if a foreign object is heated during power supply. The power supply apparatus (100) is provided with a power supply coil (103a) opposing a power-receiving unit (153) provided to a vehicle and supplying power to the power-receiving unit (153), and a casing (103b) accommodating the power supply coil (103a). In the casing (103b), a first cover (202) is formed on a surface of the casing (103b) opposing the power-receiving unit (153), and a second cover (203) opposing the first cover (202) is arranged between the first cover (202) and the power supply coil (103a).Type: GrantFiled: March 15, 2013Date of Patent: February 27, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Toshiki Tatsuta, Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka, Masayoshi Koizumi
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Patent number: 9895988Abstract: In the present invention, an electricity supply unit (103) contactlessly supplies electricity using electromagnetic induction to an electricity reception unit (153) provided to a vehicle. An electricity supply coil (103a) has a ring shape, and supplies electricity to the electricity reception unit (153) while facing the electricity reception unit (153). A casing (103b) houses the electricity supply coil (103a). The casing (103b) has an inclined section (202) that is inclined in a manner so as to approach the electricity supply coil (103a) gradually in the direction towards the outer periphery (212) of the electricity supply coil (103a) in the radial direction of the electricity supply coil (103a) at the portion at which the electricity supply coil (103a) is projected when the electricity supply coil (103a) is projected at the casing (103b) in the direction towards the electricity reception unit (153).Type: GrantFiled: March 13, 2013Date of Patent: February 20, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Masayoshi Koizumi, Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka
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Patent number: 9866036Abstract: The electricity supply device (100) supplies electricity using electromagnetic force and opposes an external electricity reception coil (153a). An electricity supply coil (102a) has a hollow section (102b), and has a spiral shape. A reader (103) has an antenna disposed in the projected space resulting from projecting the hollow section (102b) in the central axial direction of the electricity supply coil (102a) and at a position more separated from the electricity reception coil (153a) than the opposing surface that opposes the electricity reception coil (153a) and is of the electricity supply coil (102a), and ID data transmitted by an RF tag (154) installed proximally to the electricity reception coil (153a) is received and detected by the antenna. An electricity-supply-side control unit (104) determines the presence/absence of an electricity reception coil (153a) on the basis of the ID data detected by the reader (103).Type: GrantFiled: March 26, 2014Date of Patent: January 9, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Noriaki Asaoka, Osamu Ohashi, Tsuyoshi Nishio, Masayoshi Koizumi
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Patent number: 9815380Abstract: Power supply device is provided with the following: a power supply unit (121) that includes a spiral coil or a solenoid coil; a frequency characteristic acquisition unit (211) that acquires the frequency characteristics of the efficiency of the supply of power from the power supply unit to the power receiving device; a peak determining unit (212) that determines peaks in the frequency characteristics of the efficiency of power supply; and a drive frequency determination unit (213) that, if two peaks have been found, determines as the drive frequency used for supplying power a frequency near the frequency that is the lower of the frequencies of the two peaks, with the lower frequency being given priority over a frequency near the higher frequency.Type: GrantFiled: March 24, 2014Date of Patent: November 14, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Masayoshi Koizumi, Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka
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Publication number: 20170126067Abstract: This contactless power transmission device transmits power to a contactless power reception device having a reception-side coil and a reception-side resonator which resonates with the reception-side coil. The contactless power transmission device has a transmission unit including a transmission-side coil, a transmission-side resonator which resonates with the transmission-side coil, and an inverter for feeding power to the transmission-side resonator. The inductance value of the transmission-side coil and/or the capacitance value of the transmission-side resonator is set so that the frequency range in which the phase difference of a primary-side current flowing through the transmission unit relative to a primary-side voltage applied to the transmission unit is zero or above is wider than when the inductance value of the reception-side coil are equal to each other as are the capacitance value of the reception-side resonator and the capacitance value of the transmission-side resonator.Type: ApplicationFiled: April 1, 2015Publication date: May 4, 2017Inventors: MASAYOSHI KOIZUMI, OSAMU OHASHI, TOMOHIRO OTA, TAKESHI YAMAMOTO
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Patent number: 9579978Abstract: The present invention is an in-vehicle charger for detecting ground faults originating in sections in which alternating current is flowing. This device is an in-vehicle charger (100) for charging a vehicle-mounted battery, wherein the device is provided with: a bridge rectifier (14) for converting alternating current supplied from a power source to direct current; a ground fault detecting circuit (21) for outputting a test voltage when a test current flows in a circuit in the in-vehicle charger (100) and, based on changes in the test current in response to the presence or absence of a ground fault resistor, for detecting a ground fault in the circuit of the in-vehicle charger (100); and a controller (23) for controlling the ground fault sensing circuit (21) so as to output a test voltage exceeding the forward voltage of a diode provided by the bridge rectifier (14).Type: GrantFiled: February 21, 2013Date of Patent: February 28, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tsuyoshi Nishio, Osamu Ohashi, Noriaki Asaoka, Akihiro Morimoto
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Patent number: 9539911Abstract: Disclosed is a vehicle guidance apparatus that can easily guide a vehicle in the vicinity of a power supply section to the power supply unit by guiding the vehicle along a path of travel to the power supply unit without employing image data. In this device, a power supply efficiency calculation unit calculates the power supply efficiency, which is the efficiency with which power is received from the power supply unit by the charging unit. An amount of change calculation unit calculates the amount of change of efficiency of power supply, which is the amount of change of efficiency of power supply calculated by the power supply efficiency calculation unit. A vehicle-side control unit displays on a display guidance to enable the vehicle to reach the power supply unit, based on the amount of change of efficiency of power supply calculated by the amount of change calculation unit.Type: GrantFiled: December 6, 2012Date of Patent: January 10, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka
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Publication number: 20160276872Abstract: To minimize excessively high output or increases in magnetic-flux leakage by controlling power feeding on the power-feeding side if an unforeseen situation occurs. This power-feeding device (100) feeds power to an external power-receiving device (150) in a contactless manner. A power-feeding coil (103) uses electromagnetic power to feed electrical power to a power-receiving coil (154) in the power-receiving device (150). While power is being fed from said power-feeding coil (103), a power-feeding-side control unit (107) determines the amount of displacement of the power-feeding coil (103) and, on the basis of the determined displacement amount, controls the amount of electrical power being fed.Type: ApplicationFiled: March 20, 2014Publication date: September 22, 2016Inventors: Tsuyoshi NISHIO, Osamu OHASHI, Noriaki ASAOKA, Masayoshi KOIZUMI
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Publication number: 20160197487Abstract: A wireless power receiving device for receiving power wirelessly is configured to include a resonant circuit including a power receiving coil and a resonant capacitor for receiving power from a power feeding coil; and a phase adjustment circuit that is provided at a rear stage of the resonant circuit and adjusts a phase difference between a power feeding coil current and a power receiving coil current at a specific frequency to cancel horizontal magnetic flux.Type: ApplicationFiled: June 30, 2014Publication date: July 7, 2016Inventors: MASAYOSHI KOIZUMI, OSAMU OHASHI, HIDEKI SADAKATA, ATSUSHI FUJITA, YOSHIHARU OMORI
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Publication number: 20160141919Abstract: Power feed device (100) supplies power to storage battery (152) mounted on vehicle (150), through power receiving unit (154) of vehicle (150). Power supply unit (104) performs preliminary supply to power receiving unit (154) while sequentially changing a frequency, and performs main supply with power larger than in the preliminary supply. Power supply-side controller (103) acquires frequency characteristics associated with power supply coil (104a), and specifies a resonance frequency based on the acquired frequency characteristics. Power supply-side controller (103) determines whether or not to supply power to power reception coil (154a) based on a frequency difference between resonance frequencies.Type: ApplicationFiled: June 23, 2014Publication date: May 19, 2016Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: OSAMU OHASHI, TSUYOSHI NISHIO, NORIAKI ASAOKA, MASAYOSHI KOIZUMI
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Publication number: 20160134162Abstract: Disclosed is a contactless power supply device which supplies power in a contactless manner, and adopts a configuration including a power supply coil that generates an electromagnetic field and supplies power, a case that houses the power supply coil, a wire that dissolves at a temperature below a heat-resistant temperate of the case, a dissolution detection unit that detects dissolution of the wire, and a controller that performs control based on a detection result of the dissolution detection unit.Type: ApplicationFiled: June 26, 2014Publication date: May 12, 2016Inventors: MASAYOSHI KOIZUMI, OSAMU OHASHI
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Publication number: 20160114688Abstract: Inverter supplies an alternating current (AC) power of a constant voltage or a constant current to power supply coil while varying a drive frequency. Frequency characteristic acquisition unit acquires frequency characteristics of a current value associated with a current flowing through power supply coil that receives the supplied AC power, or a voltage value associated with a voltage applied to power supply coil.Type: ApplicationFiled: June 19, 2014Publication date: April 28, 2016Inventors: MASAYOSHI KOIZUMI, OSAMU OHASHI, TSUYOSHI NISHIO, NORIAKI ASAOKA
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Publication number: 20160052406Abstract: The purpose of the invention is to facilitate mounting of a power receiving coil on a vehicle and also extend the allowable range of the positional shift of the power receiving coil with respect to a power supplying coil to prevent a power supply efficiency from lowering. A power supplying device (100) uses electromagnetic force to supply power to a vehicle (130) having a power receiving coil (153a) and has a power supplying coil (103a) facing the power receiving coil (153a) and supplying power thereto. The power supplying coil (103a) has substantially the same shape as the power receiving coil (153a) and has a first length longer than a second length, said first length being the length in the right and left direction of the vehicle (130), said second length being the length in the front and rear direction of the vehicle (130).Type: ApplicationFiled: March 24, 2014Publication date: February 25, 2016Inventors: Osamu OHASHI, Masayoshi KOIZUMI
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Publication number: 20160052405Abstract: Power supply device is provided with the following: a power supply unit (121) that includes a spiral coil or a solenoid coil; a frequency characteristic acquisition unit (211) that acquires the frequency characteristics of the efficiency of the supply of power from the power supply unit to the power receiving device; a peak determining unit (212) that determines peaks in the frequency characteristics of the efficiency of power supply; and a drive frequency determination unit (213) that, if two peaks have been found, determines as the drive frequency used for supplying power a frequency near the frequency that is the lower of the frequencies of the two peaks, with the lower frequency being given priority over a frequency near the higher frequency.Type: ApplicationFiled: March 24, 2014Publication date: February 25, 2016Inventors: Masayoshi KOIZUMI, Osamu OHASHI, Tsuyoshi NISHIO, Noriaki ASAOKA
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Publication number: 20160043565Abstract: The electricity supply device (100) supplies electricity using electromagnetic force and opposes an external electricity reception coil (153a). An electricity supply coil (102a) has a hollow section (102b), and has a spiral shape. A reader (103) has an antenna disposed in the projected space resulting from projecting the hollow section (102b) in the central axial direction of the electricity supply coil (102a) and at a position more separated from the electricity reception coil (153a) than the opposing surface that opposes the electricity reception coil (153a) and is of the electricity supply coil (102a), and ID data transmitted by an RF tag (154) installed proximally to the electricity reception coil (153a) is received and detected by the antenna. An electricity-supply-side control unit (104) determines the presence/absence of an electricity reception coil (153a) on the basis of the ID data detected by the reader (103).Type: ApplicationFiled: March 26, 2014Publication date: February 11, 2016Inventors: Noriaki ASAOKA, Osamu OHASHI, Tsuyoshi NISHIO, Masayoshi KOIZUMI
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Publication number: 20150127201Abstract: The present invention is an in-vehicle charger for detecting ground faults originating in sections in which alternating current is flowing. This device is an in-vehicle charger (100) for charging a vehicle-mounted battery, wherein the device is provided with: a bridge rectifier (14) for converting alternating current supplied from a power source to direct current; a ground fault detecting circuit (21) for outputting a test voltage when a test current flows in a circuit in the in-vehicle charger (100) and, based on changes in the test current in response to the presence or absence of a ground fault resistor, for detecting a ground fault in the circuit of the in-vehicle charger (100); and a controller (23) for controlling the ground fault sensing circuit (21) so as to output a test voltage exceeding the forward voltage of a diode provided by the bridge rectifier (14).Type: ApplicationFiled: February 21, 2013Publication date: May 7, 2015Inventors: Tsuyoshi Nishio, Osamu Ohashi, Noriaki Asaoka, Akihiro Morimoto
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Publication number: 20150102664Abstract: In the power supply apparatus (100), on an upper surface (202a), which is the surface opposing the power-receiving unit (153) of a cabinet (103b), in the portion where a power supply coil (103a) is projected when the power supply coil (103a) is projected on the cabinet (103b) toward the direction of the power-receiving unit (153), a first inclined part (203) gradually approaching the power supply coil (103a) from the top section (205) toward the inner edge section (211) of the power supply coil (103a) is formed in the radial direction of the power supply coil (103a), and in the portion where the power supply coil (103a) is projected, a second inclined part (204) gradually approaching the power supply coil (103a) from the top section (205) toward the outer periphery (212) of the power supply coil (103a) is formed in the radial direction of the power supply coil (103a).Type: ApplicationFiled: March 7, 2013Publication date: April 16, 2015Inventors: Toshiki Tatsuta, Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka, Masayoshi Koizumi
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Publication number: 20150084405Abstract: In the present invention, an electricity supply unit (103) contactlessly supplies electricity using electromagnetic induction to an electricity reception unit (153) provided to a vehicle. An electricity supply coil (103a) has a ring shape, and supplies electricity to the electricity reception unit (153) while facing the electricity reception unit (153). A casing (103b) houses the electricity supply coil (103a). The casing (103b) has an inclined section (202) that is inclined in a manner so as to approach the electricity supply coil (103a) gradually in the direction towards the outer periphery (212) of the electricity supply coil (103a) in the radial direction of the electricity supply coil (103a) at the portion at which the electricity supply coil (103a) is projected when the electricity supply coil (103a) is projected at the casing (103b) in the direction towards the electricity reception unit (153).Type: ApplicationFiled: March 13, 2013Publication date: March 26, 2015Inventors: Masayoshi Koizumi, Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka
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Publication number: 20150061582Abstract: A power supply apparatus capable of appropriately supplying electrical power to a power transmission coil even if a foreign object is heated during power supply. The power supply apparatus (100) is provided with a power supply coil (103a) opposing a power-receiving unit (153) provided to a vehicle and supplying power to the power-receiving unit (153), and a casing (103b) accommodating the power supply coil (103a). In the casing (103b), a first cover (202) is formed on a surface of the casing (103b) opposing the power-receiving unit (153), and a second cover (203) opposing the first cover (202) is arranged between the first cover (202) and the power supply coil (103a).Type: ApplicationFiled: March 15, 2013Publication date: March 5, 2015Applicant: Panasonic CorporationInventors: Toshiki Tatsuta, Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka, Masayoshi Koizumi
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Publication number: 20140371966Abstract: Disclosed is a vehicle guidance apparatus that can easily guide a vehicle in the vicinity of a power supply section to the power supply unit by guiding the vehicle along a path of travel to the power supply unit without employing image data. In this device, a power supply efficiency calculation unit calculates the power supply efficiency, which is the efficiency with which power is received from the power supply unit by the charging unit. An amount of change calculation unit calculates the amount of change of efficiency of power supply, which is the amount of change of efficiency of power supply calculated by the power supply efficiency calculation unit. A vehicle-side control unit displays on a display guidance to enable the vehicle to reach the power supply unit, based on the amount of change of efficiency of power supply calculated by the amount of change calculation unit.Type: ApplicationFiled: December 6, 2012Publication date: December 18, 2014Inventors: Osamu Ohashi, Tsuyoshi Nishio, Noriaki Asaoka