Patents by Inventor Hiroshi Suetake

Hiroshi Suetake 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).

  • Voltage source inverter control method
    Patent number: 7362069
    Abstract: A simple and accurate dead time dispersion measurement method and a voltage source inverter control method that can prevent the occurrence of an unstable phenomenon are provided. The control method controls a voltage source inverter of a PWM system, which includes a power semiconductor device controlling a level of a voltage, a frequency and a phase. According to the control method, before operation, voltage error information for each polarity of respective phase currents of the inverter is stored. And during the operation, the voltage error information is read to compensate for a voltage instruction value or a pulse width of a PWM instruction signal, so that a voltage error can be corrected.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: April 22, 2008
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yoichi Yamamoto, Masashiro Tanaka, Shigekazu Nakamura, Hiroshi Suetake
  • Voltage source inverter control method
    Publication number: 20070030705
    Abstract: A simple and accurate dead time dispersion measurement method and a voltage source inverter control method that can prevent the occurrence of an unstable phenomenon are provided. The control method controls a voltage source inverter of a PWM system, which includes a power semiconductor device controlling a level of a voltage, a frequency and a phase. According to the control method, before operation, voltage error information for each polarity of respective phase currents of the inverter is stored. And during the operation, the voltage error information is read to compensate for a voltage instruction value or a pulse width of a PWM instruction signal, so that a voltage error can be corrected.
    Type: Application
    Filed: July 30, 2004
    Publication date: February 8, 2007
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yoichi Yamamoto, Masashiro Tanaka, Shigekazu Nakamura, Hiroshi Suetake