Patents by Inventor Hiroki MUNECHIKA

Hiroki MUNECHIKA 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).

  • Inverter apparatus including control circuit employing two-phase modulation control, and interconnection inverter system including the inverter apparatus
    Patent number: 10630200
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: April 21, 2020
    Assignee: DAIHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • INVERTER APPARATUS INCLUDING CONTROL CIRCUIT EMPLOYING TWO-PHASE MODULATION CONTROL, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS
    Publication number: 20190334452
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are highl.
    Type: Application
    Filed: July 5, 2019
    Publication date: October 31, 2019
    Inventors: Nobuyuki HATTORI, Akihiro OHORI, Hiroki MUNECHIKA
  • Inverter apparatus including control circuit employing two-phase modulation control, and interconnection inverter system including the inverter apparatus
    Patent number: 10389269
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are highl.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: August 20, 2019
    Assignee: DAIHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • NVERTER APPARATUS INCLUDING CONTROL CIRCUIT EMPLOYING TWO-PHASE MODULATION CONTROL, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS
    Publication number: 20190052185
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are highl.
    Type: Application
    Filed: October 19, 2018
    Publication date: February 14, 2019
    Inventors: Nobuyuki HATTORI, Akihiro OHORI, Hiroki MUNECHIKA
  • Inverter apparatus including control circuit employing two-phase modulation control, and interconnection inverter system including the inverter apparatus
    Patent number: 10141864
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: November 27, 2018
    Assignee: DAUHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • INVERTER APPARATUS INCLUDING CONTROL CIRCUIT EMPLOYING TWO-PHASE MODULATION CONTROL, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS
    Publication number: 20180234029
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Application
    Filed: April 18, 2018
    Publication date: August 16, 2018
    Inventors: Nobuyuki HATTORI, Akihiro OHORI, Hiroki MUNECHIKA
  • Inverter apparatus including control circuit employing two-phase modulation control, and interconnection inverter system including the inverter apparatus
    Patent number: 9979317
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high1.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: May 22, 2018
    Assignee: DAIHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • INVERTER APPARATUS INCLUDING CONTROL CIRCUIT EMPLOYING TWO-PHASE MODULATION CONTROL, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS
    Publication number: 20160241158
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high1.
    Type: Application
    Filed: February 11, 2016
    Publication date: August 18, 2016
    Inventors: Nobuyuki HATTORI, Akihiro OHORI, Hiroki MUNECHIKA
  • Inverter apparatus including control circuit employing two-phase modulation control, and interconnection inverter system including the inverter apparatus
    Patent number: 9294009
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: March 22, 2016
    Assignee: DAIHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • CONTROL CIRCUIT FOR CONTROLLING POWER CONVERSION CIRCUIT, INVERTER APPARATUS INCLUDING THE CONTROL CIRCUIT, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS
    Publication number: 20120243276
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Application
    Filed: March 7, 2012
    Publication date: September 27, 2012
    Applicant: DAIHEN CORPORATION
    Inventors: Nobuyuki HATTORI, Akihiro OHORI, Hiroki MUNECHIKA