Patents by Inventor Fumi Moritsuka
Fumi Moritsuka 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: 10992181Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: GrantFiled: February 15, 2017Date of Patent: April 27, 2021Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Shijo, Akiko Yamada, Kohei Onizuka, Fumi Moritsuka, Hiroaki Ishihara, Noriaki Oodachi, Shuichi Obayashi, Hiroki Kudo, Kenichirou Ogawa, Shoji Otaka, Hiroki Shoki
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Patent number: 10763024Abstract: A power transmission apparatus includes a power transmission pad, a base structure, and grout. The power transmission pad for wireless power transmission has a cast resin frame, at least part of the cast resin frame being embedded in the ground. The base structure is disposed below the power transmission pad. The grout is filled around the power transmission pad, including a gap between an upper surface of the base structure and the power transmission pad.Type: GrantFiled: September 13, 2017Date of Patent: September 1, 2020Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Shijo, Makio Fukumoto, Fumi Moritsuka, Shuichi Obayashi
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Patent number: 10461662Abstract: According to one embodiment, an AC/DC converter includes a switching element that responds to a drive signal. The drive signal is generated from a three-level PWM signal that is generated from a two-level PWM signal generated from a voltage of an AC power supply and a reference signal. When a polarity of the voltage of the AC power supply is inverted, the AC/DC converter generates the drive signal by using a two-level PW signal obtained by inverting a duty ratio of a two-level PWM signal during a period just before an inversion of the polarity of the voltage of the AC power supply.Type: GrantFiled: March 1, 2019Date of Patent: October 29, 2019Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Toshiyuki Ogawa, Fumi Moritsuka
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Patent number: 10224748Abstract: According to one embodiment, there is provided a power transmitting device including: a power supply, a resonator, an adjuster and a controller. The power supply supplies AC power. The resonator includes a magnetic core and a coil wound around the magnetic core, the resonator wirelessly transmitting the AC power supplied from the power supply to a different resonator arranged to be opposed to the resonator. The adjuster relatively moves the coil and the magnetic core along a longitudinal direction of the coil. The controller controls the adjuster based on a value of current flowing in the resonator to adjust relative positions of the magnetic core and the coil.Type: GrantFiled: June 25, 2014Date of Patent: March 5, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Akiko Yamada, Tetsu Shijo, Shuichi Obayashi, Hiroaki Ishihara, Kohei Onizuka, Kenichirou Ogawa, Fumi Moritsuka, Hiroki Kudo, Noriaki Oodachi
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Publication number: 20180096773Abstract: A power transmission apparatus includes a power transmission pad, a base structure, and grout. The power transmission pad for wireless power transmission has a cast resin frame, at least part of the cast resin frame being embedded in the ground. The base structure is disposed below the power transmission pad. The grout is filled around the power transmission pad, including a gap between an upper surface of the base structure and the power transmission pad.Type: ApplicationFiled: September 13, 2017Publication date: April 5, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu SHIJO, Makio FUKUMOTO, Fumi MORITSUKA, Shuichi OBAYASHI
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Publication number: 20170170690Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: ApplicationFiled: February 15, 2017Publication date: June 15, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu SHIJO, Akiko YAMADA, Kohei ONIZUKA, Fumi MORITSUKA, Hiroaki ISHIHARA, Noriaki OODACHI, Shuichi OBAYASHI, Hiroki KUDO, Kenichirou OGAWA, Shoji OTAKA, Hiroki SHOKI
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Patent number: 9614487Abstract: A receiving apparatus includes a variable gain unit to change between a first gain and a smaller second gain, and to amplify a received signal to obtain an amplified signal; a comparator to compare a power of the amplified signal with a reference value; and a controller to set a gain to the first gain while in a standby state, to reset a gain to a third gain between the first and second gains if in a standby state the power of the received signal is larger than the reference value, and then to set a gain to the first gain and return to the standby state if the power is equal to or lower than the reference value, or if not, to a fourth gain between the first and third gains.Type: GrantFiled: March 9, 2012Date of Patent: April 4, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Tsuyoshi Kogawa, Koji Ogura, Toshiyuki Umeda, Takafumi Sakamoto, Fumi Moritsuka, Hiroaki Ishihara
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Patent number: 9608453Abstract: There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: GrantFiled: January 10, 2013Date of Patent: March 28, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Shijo, Akiko Yamada, Kohei Onizuka, Fumi Moritsuka, Hiroaki Ishihara, Noriaki Oodachi, Shuichi Obayashi, Hiroki Kudo, Kenichirou Ogawa, Shoji Otaka, Hiroki Shoki
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Patent number: 9343225Abstract: There provided a power receiving device connectable with a first load circuit operating according to AC power from a power transmitting device in which the power receiver receives the AC power from the power transmitting device via magnetic coupling, the impedance adjuster is capable of converting at least one of voltage and current of the AC power received at the power receiver, the controller controls increase in output voltage of the power transmitting device, the AC power is supplied to the first load circuit via the impedance adjuster when the first load circuit is connected to the power receiving device, and the controller controls the impedance adjuster such that an input impedance of the impedance adjuster is lower than an input impedance of the first load circuit during at least a part of a time period where the output voltage of the power transmitting device is increased.Type: GrantFiled: December 17, 2012Date of Patent: May 17, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kohei Onizuka, Shoji Otaka, Hiroaki Ishihara, Fumi Moritsuka
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Publication number: 20150001955Abstract: According to one embodiment, there is provided a power transmitting device including: a power supply, a resonator, an adjuster and a controller. The power supply supplies AC power. The resonator includes a magnetic core and a coil wound around the magnetic core, the resonator wirelessly transmitting the AC power supplied from the power supply to a different resonator arranged to be opposed to the resonator. The adjuster relatively moves the coil and the magnetic core along a longitudinal direction of the coil. The controller controls the adjuster based on a value of current flowing in the resonator to adjust relative positions of the magnetic core and the coil.Type: ApplicationFiled: June 25, 2014Publication date: January 1, 2015Inventors: Akiko Yamada, Tetsu Shijo, Shuichi Obayashi, Hiroaki Ishihara, Kohei Onizuka, Kenichirou Ogawa, Fumi Moritsuka, Hiroki Kudo, Noriaki Oodachi
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Publication number: 20140339905Abstract: A foreign object detection device has a foreign object detector configured to detect a foreign object when a power receiver receives power from a power transmitter in a non-contact manner, the foreign object detector being arranged between the power receiver and the power transmitter, and a power control signal generator configured to generate a power control signal which controls the power transmitted from the power transmitter when the foreign object is detected by the foreign object detectorType: ApplicationFiled: March 11, 2014Publication date: November 20, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Fumi MORITSUKA, Kohei ONIZUKA, Hiroki KUDO, Shoji OTAKA, Hiroaki ISHIHARA, Katsuyuki IKEUCHI
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Publication number: 20140333144Abstract: According to one embodiment, there is provided a control apparatus for a first wireless power transmission apparatus and a second wireless power transmission apparatus. The first wireless power transmission apparatus includes a first inductor and an alternating-current signal source that supplies an alternating-current power to the first inductor. The second wireless power transmission apparatus includes a second inductor that receives the alternating-current power wirelessly from the first inductor. The position controller controls a phase relationship of current flowing in the first inductor and the second inductor such that attractive force or repulsive force is generated between the first and second inductors, and adjusts a relative position of the first inductor and the second inductor by use of the attractive force or the repulsive force.Type: ApplicationFiled: March 12, 2014Publication date: November 13, 2014Inventors: Katsuyuki IKEUCHI, Kohei ONIZUKA, Hiroaki ISHIHARA, Hiroki KUDO, Shoji OOTAKA, Kenichirou OGAWA, Fumi MORITSUKA
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Publication number: 20140139035Abstract: There is provided a wireless power transmission controller in which the input device receives first power information from a power transmitting device, indicating electric power transmitted by the power transmitting device, and second power information from a power receiving device, indicating electric power received by the power receiving device, the output device outputs a first control signal instructing a transmission voltage of the power transmitting device, and a second control signal instructing an impedance of the power receiving device, the control device performs raising control of transmission power of the power transmitting device by generating the second control signal so that a difference between the first and second power information becomes small, and generates the first control signal so that a difference between the first power information and a first target value or a difference between the second power information and a second target value becomes small.Type: ApplicationFiled: November 12, 2013Publication date: May 22, 2014Inventors: Hiroaki ISHIHARA, Kohei ONIZUKA, Fumi MORITSUKA, Shoji OTAKA
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Publication number: 20130249299Abstract: There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: ApplicationFiled: January 10, 2013Publication date: September 26, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu SHIJO, Akiko YAMADA, Kohei ONIZUKA, Fumi MORITSUKA, Hiroaki ISHIHARA, Noriaki OODACHI, Shuichi OBAYASHI, Hiroki KUDO, Kenichirou OGAWA, Shoji OTAKA, Hiroki SHOKI
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Publication number: 20130234527Abstract: According to one embodiment, a wireless electric power transmission device supplies electric power, transmitted wirelessly from a first device, to a load circuit. The device includes a power receiving resonance unit, a detecting unit which detects electric power information corresponding to the electric power supplied to the load circuit, and a control unit. The control unit determines whether to adjust at least one of a resonant frequency of the power receiving resonance unit, an output frequency of an alternating current power supply of the first device, and a resonant frequency of a power transmitting resonance unit of the first device, on the basis of a relationship in terms of magnitude between first electric power information when the impedance is a first impedance and second electric power information when the impedance is a second impedance.Type: ApplicationFiled: November 26, 2012Publication date: September 12, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hiroaki ISHIHARA, Kohei ONIZUKA, Fumi MORITSUKA, Shoji OTAKA
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Publication number: 20130200719Abstract: There is provided a control device that estimates power transmission efficiency between a power transmitting unit and a power receiving unit. The power transmitting unit includes a first coil and a first capacitor connected to the first coil in parallel or in series. The power receiving unit includes a second coil and a second capacitor connected to the second coil in parallel or in series and receives electric power from the power transmitting unit through a coupling between the first coil and the second coil. The control device includes an estimator. The estimator compares a detected value of a first voltage or a first current at a first location in the power transmitting unit with a detected value of second voltage or second current at a second location in the power receiving unit and estimates the power transmission efficiency from the power transmitting unit to the power receiving unit.Type: ApplicationFiled: December 18, 2012Publication date: August 8, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hiroaki ISHIHARA, Kohei ONIZUKA, Fumi MORITSUKA, Shoji OTAKA
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Publication number: 20130181537Abstract: There provided a power receiving device connectable with a first load circuit operating according to AC power from a power transmitting device in which the power receiver receives the AC power from the power transmitting device via magnetic coupling, the impedance adjuster is capable of converting at least one of voltage and current of the AC power received at the power receiver, the controller controls increase in output voltage of the power transmitting device, the AC power is supplied to the first load circuit via the impedance adjuster when the first load circuit is connected to the power receiving device, and the controller controls the impedance adjuster such that an input impedance of the impedance adjuster is lower than an input impedance of the first load circuit during at least a part of a time period where the output voltage of the power transmitting device is increased.Type: ApplicationFiled: December 17, 2012Publication date: July 18, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kohei ONIZUKA, Shoji OTAKA, Hiroaki ISHIHARA, Fumi MORITSUKA
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Patent number: 8489030Abstract: A radio apparatus capable of correcting a direct current offset with high accuracy in a short time is provided. A radio apparatus according to an embodiment includes a first amplifier amplifying a signal inputted to an input terminal with amplification gain determined by a variable resistor to generate a first amplified signal, and a second amplifier amplifying the first amplified signal to generate a second amplified signal. Further, the radio apparatus includes a first correcting unit correcting a direct current offset of the first amplifier, and a second correcting unit correcting a direct current offset of the second amplifier.Type: GrantFiled: March 21, 2011Date of Patent: July 16, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Fumi Moritsuka, Shoji Otaka, Masahiro Hosoya, Hiroaki Ishihara, Tsuyoshi Kogawa
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Publication number: 20120231756Abstract: A receiving apparatus includes a variable gain unit to change between a first gain and a smaller second gain, and to amplify a received signal to obtain an amplified signal; a comparator to compare a power of the amplified signal with a reference value; and a controller to set a gain to the first gain while in a standby state, to reset a gain to a third gain between the first and second gains if in a standby state the power of the received signal is larger than the reference value, and then to set a gain to the first gain and return to the standby state if the power is equal to or lower than the reference value, or if not, to a fourth gain between the first and third gains.Type: ApplicationFiled: March 9, 2012Publication date: September 13, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Tsuyoshi Kogawa, Koji Ogura, Toshiyuki Umeda, Takafumi Sakamoto, Fumi Moritsuka, Hiroaki Ishihara
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Patent number: 8199265Abstract: The present invention provides an optical waveform shaping device (10) of high resolution comprising a branching filter (1) for branching the light beam from a light source into light beams of each frequency, a condensing part (2) for condensing a plurality of light beams branched by the branching filter (1), a polarizing plate (3) for adjusting the polarization planes of the light beams having passed through the condensing part (2), and a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident.Type: GrantFiled: June 13, 2008Date of Patent: June 12, 2012Assignee: National Institute of Information and Communications TechnologyInventors: Naoya Wada, Seitetsu Boku, Takuya Yoda, Yuki Komai, Fumi Moritsuka, Kashiko Kodate