Patents by Inventor Yuuko Yamasaki

Yuuko Yamasaki 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).

  • 3-Phase converter apparatus
    Patent number: 5182463
    Abstract: A 3-phase converter apparatus, in which a 3-phase A.C. power supply and a 3-phase converter operate in parallel on a common load BUS so as to share the load power, has an output voltage command generating device for generating an instantaneous command of the output voltage from the converter, and instantaneous voltage control device for controlling the converter so as to reduce the deviation of the instantaneous value of the output voltage of the converter from the instantaneous command generated by the output voltage command generating device. The converter includes at least one semiconductor switch for effecting a plurality of switching cycles in a half cycle of the A.C. power, so that the control of the phase of the output voltage of the converter with respect to the A.C. power supply is started at any moment.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: January 26, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuushin Yamamoto, Nobuo Sashida, Yuuko Yamasaki, Takao Kawabata