Patents by Inventor Satoshi IWAI

Satoshi IWAI 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).

  • Patent number: 11329546
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermining switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit induces first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: May 10, 2022
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto
  • Patent number: 11196413
    Abstract: A switching element 1 has a gate terminal connected to an output end Vout of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to the driving circuit 12 via a capacitor 14 and a Zener diode 15 connected in parallel. The Zener diode 15 has an anode terminal connected to the source terminal of the switching element 1 and a cathode terminal connected to the driving circuit 12.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: December 7, 2021
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Wataru Okada, Hironori Nakada, Satoshi Iwai
  • Publication number: 20210367499
    Abstract: A switching element 1 has a gate terminal connected to a Vout end 123 of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to a Vee end 124 of the driving circuit 12 via a capacitor 14 and a resistor 14 connected in parallel.
    Type: Application
    Filed: March 13, 2019
    Publication date: November 25, 2021
    Inventors: Noriyuki NOSAKA, Wataru OKADA, Hironori NAKADA, Satoshi IWAI
  • Patent number: 11165421
    Abstract: A switching element 1 has a gate terminal connected to an output end 123 of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to the driving circuit 12 via a capacitor 14. A diode 15 connected in series with a resistor 16 has a cathode terminal connected to a section between the capacitor 11 and the resistor 13, and the gate terminal and an anode terminal connected, via the resistor 16, to a section between the source terminal and the capacitor 14.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 2, 2021
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Wataru Okada, Hironori Nakada, Satoshi Iwai
  • Publication number: 20210320653
    Abstract: A switching element 1 has a gate terminal connected to an output end 123 of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to the driving circuit 12 via a capacitor 14. A diode 15 connected in series with a resistor 16 has a cathode terminal connected to a section between the capacitor 11 and the resistor 13, and the gate terminal and an anode terminal connected, via the resistor 16, to a section between the source terminal and the capacitor 14.
    Type: Application
    Filed: March 14, 2019
    Publication date: October 14, 2021
    Inventors: Noriyuki NOSAKA, Wataru OKADA, Hironori NAKADA, Satoshi IWAI
  • Publication number: 20210273553
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermined switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit includes first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than multiple times the switching frequency by insertion of the inductor.
    Type: Application
    Filed: March 11, 2019
    Publication date: September 2, 2021
    Inventors: Noriyuki NOSAKA, Takeo NISHIKAWA, Wataru OKADA, Satoshi IWAI, Takanori ISHII, Gun ETO
  • Publication number: 20210242867
    Abstract: A switching element 1 has a gate terminal connected to an output end Vout of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to the driving circuit 12 via a capacitor 14 and a Zener diode 15 connected in parallel. The Zener diode 15 has an anode terminal connected to the source terminal of the switching element 1 and a cathode terminal connected to the driving circuit 12.
    Type: Application
    Filed: March 13, 2019
    Publication date: August 5, 2021
    Inventors: Noriyuki NOSAKA, Wataru OKADA, Hironori NAKADA, Satoshi IWAI
  • Publication number: 20210242864
    Abstract: A driver circuit controls a first switch element. A first resistor is connected between the driver circuit and the first switch element. A second switch element is connected to the first switch element. An overcurrent detector circuit controls the second switch element based on an overcurrent current flowing through the first switch element. A second resistor is connected between the overcurrent detector circuit and the second switch element. The first and second resistor is set such that a turn-off time of the first switch element when the second switch element is turned on by the overcurrent detector circuit is longer than a turn-off time of the first switch element when the first switch element is turned off by the driver circuit.
    Type: Application
    Filed: March 11, 2019
    Publication date: August 5, 2021
    Inventors: Wataru OKADA, Satoshi IWAI, Noriyuki NOSAKA, Takeo NISHIKAWA, Kenji KOBAYASHI, Keiji SHIRAISHI
  • Publication number: 20210226620
    Abstract: An overcurrent protection circuit is provided for a switching element turned on/off based on a control voltage. The overcurrent protection circuit includes a first transistor and a second transistor. The first transistor is a PNP bipolar transistor and has an emitter connected to the control voltage. The second transistor is an NPN bipolar transistor and has a base connected to a collector of the first transistor, a collector connected to a base of the first transistor and pulled up to a predetermined pull-up voltage, and a grounded emitter. When the control voltage exceeds a predetermined first threshold voltage, the first and second transistors are turned on, the control voltage is dropped by drop of the pull-up voltage, and thus the overcurrent protection circuit starts a protection operation of turning off the switching element.
    Type: Application
    Filed: January 30, 2020
    Publication date: July 22, 2021
    Inventors: Hironori NAKADA, Satoshi IWAI, Noriyuki NOSAKA
  • Publication number: 20210167692
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermining switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit induces first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.
    Type: Application
    Filed: March 11, 2019
    Publication date: June 3, 2021
    Inventors: Noriyuki NOSAKA, Takeo NISHIKAWA, Wataru OKADA, Satoshi IWAI, Takanori ISHII, Gun ETO
  • Patent number: 10998138
    Abstract: A solid electrolytic capacitor according to the present disclosure includes an anode body made of a porous valve metal, a dielectric layer formed on a surface of the anode body, and a solid electrolyte layer formed on the dielectric layer. A carboxylic acid ester is filled in at least part of cavities inside the solid electrolyte layer. By the solid electrolytic capacitor according to the present disclosure, it is possible to provide a solid electrolytic capacitor capable of suppressing an increase in ESR and an increase in leakage current.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: May 4, 2021
    Assignee: TOKIN CORPORATION
    Inventors: Masanori Takahashi, Satoshi Iwai, Yusuke Hoshina
  • Patent number: 10876851
    Abstract: An environment adjustment system includes an acquisition unit configured to acquire environmental information of an environment related to a user, a drafting unit configured to draft an action plan to recommend to the user based on the environmental information, a transmission unit configured to transmit the action plan to the user's terminal, and a confirming unit configured to confirm whether the user has performed the action plan. When the drafting unit drafts a new action plan for another user or for the user, it drafts the new action plan using a result of the confirmation by the confirming unit.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: December 29, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Iwai, Koji Yamada, Marie Ishikawa, Akinori Sato, Hiroyuki Yamada, Akira Shichi, Masanori Ishigaki, Shuji Tomura, Kenji Ito, Reiko Makino, Keisuke Ichige
  • Patent number: 10846786
    Abstract: A storage battery module rental system includes a storage battery module prepared in each providing point that is dispersedly distributed and that can be rented to a user, an acquisition unit configured to acquire individual information of a plurality of the users and module information from the storage battery module, the user being a rentee candidate of the storage battery module, a determining unit configured to determine an incentive given for renting the storage battery module based on the individual information and the module information in such a way that the incentive could differ for each user; and a notifying unit configured to notify the user of the incentive determined by the determining unit for each of the users.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: November 24, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Iwai, Koji Yamada, Marie Ishikawa, Akinori Sato, Masanori Ishigaki, Shuji Tomura, Shigeaki Goto, Makoto Kusakabe, Tomoki Nishi, Akira Shichi, Hiroyuki Yamada
  • Patent number: 10670015
    Abstract: A screw compressor includes a screw rotor, an electric motor for driving the screw rotor, bearings supporting the screw rotor and casings housing these members. The screw compressor also includes an oil feeding passage formed in the casing for feeding oil on a high pressure side to the bearings by a differential pressure between the high pressure side and a low pressure side and an oil feeding amount adjusting unit placed in a middle of the oil feeding passage, the oil feeding amount adjusting unit includes a cylinder, a valve element provided to reciprocate inside the cylinder, and plural flow paths provided in the valve element having different flow path areas, the plural flow paths are switched to adjust an oil feeding amount to be fed to the bearings by moving the valve element in accordance with the differential pressure between the high pressure side and the low pressure side.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: June 2, 2020
    Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.
    Inventors: Satoshi Iwai, Ryuichiro Yonemoto, Eisuke Kato
  • Publication number: 20190392997
    Abstract: A solid electrolytic capacitor according to the present disclosure includes an anode body made of a porous valve metal, a dielectric layer formed on a surface of the anode body, and a solid electrolyte layer formed on the dielectric layer. A carboxylic acid ester is filled in at least part of cavities inside the solid electrolyte layer. By the solid electrolytic capacitor according to the present disclosure, it is possible to provide a solid electrolytic capacitor capable of suppressing an increase in ESR and an increase in leakage current.
    Type: Application
    Filed: December 5, 2018
    Publication date: December 26, 2019
    Inventors: Masanori TAKAHASHI, Satoshi IWAI, Yusuke HOSHINA
  • Publication number: 20190193573
    Abstract: A traveling energy distribution system includes a plurality of supply facilities each of which is able to supply traveling energy to a vehicle, an information acquisition unit configured to acquire, from a vehicle, vehicle information relevant to an amount of traveling energy remaining in the vehicle and acquire, from each of the plurality of supply facilities, supply facility information relevant to an amount of traveling energy that can be supplied from that supply facility, and a determination unit configured to determine a transfer source supply facility and a transfer destination supply facility for traveling energy to be transferred from among the plurality of supply facilities and determine an amount of the traveling energy to be transferred based on the vehicle information and the supply facility information acquired by the information acquisition unit.
    Type: Application
    Filed: November 16, 2018
    Publication date: June 27, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi IWAI, Koji YAMADA, Marie ISHIKAWA, Akinori SATO, Hiroyuki YAMADA, Akira SHICHI, Masanori ISHIGAKI, Shuji TOMURA, Shigeaki GOTO, Hajime MURATA, Kenji ITO, Reiko MAKINO, Keisuke ICHIGE
  • Publication number: 20190197608
    Abstract: A storage battery module rental system includes a storage battery module prepared in each providing point that is dispersedly distributed and that can be rented to a user, an acquisition unit configured to acquire individual information of a plurality of the users and module information from the storage battery module, the user being a rentee candidate of the storage battery module, a determining unit configured to determine an incentive given for renting the storage battery module based on the individual information and the module information in such a way that the incentive could differ for each user; and a notifying unit configured to notify the user of the incentive determined by the determining unit for each of the users.
    Type: Application
    Filed: October 29, 2018
    Publication date: June 27, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi IWAI, Koji YAMADA, Marie ISHIKAWA, Akinori SATO, Masanori ISHIGAKI, Shuji TOMURA, Shigeaki GOTO, Makoto KUSAKABE, Tomoki NISHI, Akira SHICHI, Hiroyuki YAMADA
  • Publication number: 20190195646
    Abstract: An environment adjustment system includes an acquisition unit configured to acquire environmental information of an environment related to a user, a drafting unit configured to draft an action plan to recommend to the user based on the environmental information, a transmission unit configured to transmit the action plan to the user's terminal, and a confirming unit configured to confirm whether the user has performed the action plan. When the drafting unit drafts a new action plan for another user or for the user, it drafts the new action plan using a result of the confirmation by the confirming unit.
    Type: Application
    Filed: October 29, 2018
    Publication date: June 27, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi IWAI, Koji YAMADA, Marie ISHIKAWA, Akinori SATO, Hiroyuki YAMADA, Akira SHICHI, Masanori ISHIGAKI, Shuji TOMURA, Kenji ITO, Reiko MAKINO, Keisuke ICHIGE
  • Patent number: 10312795
    Abstract: An inverter has a plurality of switching elements, the states of which are each switched by a pulse signal supplied in accordance with a power grid voltage. The inverter is provided with: a switching circuit that converts an input DC voltage to an AC voltage and outputs the AC voltage to a pair of output lines; a filter circuit having output coils inserted in the output lines; a current detection sensor that detects the current flowing through the output coils; and a high-speed pulse control circuit that, when an absolute value of the detected current is a threshold value or more, stops the supply of the pulse signal to the switching circuit.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: June 4, 2019
    Assignee: OMRON Corporation
    Inventors: Takeo Nishikawa, Hironori Nakada, Satoshi Iwai, Hiroki Kawano, Yuhki Kamatani, Kuniyuki Hirai
  • Patent number: 10211756
    Abstract: An inverter circuit provided in a power conversion device includes a full-bridge inverter, and a short circuit part. The short circuit part includes switching elements and clamp elements connected to the switching elements. The clamp elements suppress application of an excessive voltage such as a surge voltage to the switching elements.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: February 19, 2019
    Assignee: OMRON Corporation
    Inventors: Takeo Nishikawa, Wataru Okada, Takayoshi Tawaragi, Satoshi Iwai