Patents by Inventor Noriyuki NOSAKA

Noriyuki NOSAKA 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
  • Publication number: 20220060101
    Abstract: A voltage balance circuit including first and second semiconductor devices connected in series with each other is provided with a first transformer having a primary winding and a secondary winding, a second transformer having a primary winding and a secondary winding. A pair of capacitors connected in series with each other and connected between the output terminals of the plurality of semiconductor devices. A first control signal is applied to the control electrode of the first semiconductor device via the primary winding of the first transformer. A second control signal is applied to the control electrode of the second semiconductor device via the primary winding of the second transformer, with one end of each secondary winding connected to each other.
    Type: Application
    Filed: March 14, 2019
    Publication date: February 24, 2022
    Inventors: Noriyuki NOSAKA, Wataru OKADA, Chen CHEN, Takanori ISHII
  • 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