Patents by Inventor Hironori NAKADA

Hironori NAKADA 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: 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: 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: 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
  • Patent number: 10516346
    Abstract: A power converter is provided with an inverter unit for converting DC power from a DC power supply into AC power, and a control unit that generates a control signal for controlling the inverter unit. The control unit includes an impedance estimation unit that injects a disturbance signal into a load and derives an estimated value of an impedance of the load based on a voltage signal from the load into which the disturbance signal is injected, the impedance compensator unit whose control parameters are set based on the estimated value of the impedance, and that corrects an output current signal in accordance with the control parameters, a command value unit that outputs a command value indicating a control target value, and a control compensator unit that generates a control signal, based on the command value from the command value unit and the current signal from the impedance compensator unit.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: December 24, 2019
    Assignee: OMRON Corporation
    Inventors: Yuhki Kamatani, Takeo Nishikawa, Hironori Nakada
  • Publication number: 20190190402
    Abstract: A power converter is provided with an inverter unit for converting DC power from a DC power supply into AC power, and a control unit that generates a control signal for controlling the inverter unit. The control unit includes an impedance estimation unit that injects a disturbance signal into a load and derives an estimated value of an impedance of the load based on a voltage signal from the load into which the disturbance signal is injected, the impedance compensator unit whose control parameters are set based on the estimated value of the impedance, and that corrects an output current signal in accordance with the control parameters, a command value unit that outputs a command value indicating a control target value, and a control compensator unit that generates a control signal, based on the command value from the command value unit and the current signal from the impedance compensator unit.
    Type: Application
    Filed: November 6, 2018
    Publication date: June 20, 2019
    Applicant: OMRON Corporation
    Inventors: Yuhki KAMATANI, Takeo NISHIKAWA, Hironori NAKADA
  • 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
  • Publication number: 20180248474
    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: Application
    Filed: January 11, 2017
    Publication date: August 30, 2018
    Applicant: OMRON Corporation
    Inventors: Takeo NISHIKAWA, Hironori NAKADA, Satoshi IWAI, Hiroki KAWANO, Yuhki KAMATANI, Kuniyuki HIRAI