Patents by Inventor Masaru Ukawa

Masaru Ukawa 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).

  • Photovoltaic power control system
    Patent number: 4636931
    Abstract: There is disclosed a photovoltaic power control system equipped with at least one inverter for inverting an output of a solar cell array to AC power, and having charge-and discharge control means for charging a surplus portion with respect to the power for expected use of the output of the solar cell array to a storage battery and discharging shortage portion with respect to the power for expected use of the output of the solar cell array from the storage battery by detecting the surplus or shortage produced between the output of the solar cell array and AC power for expected use inverted by the inverter, the improvement comprising weather fluctuation pattern selection means for selecting one weather pattern out of various kinds of weather patterns preset based on weather information at a time point when the weather is forecasted on the day when the power is generated by the solar cell array; and workable pattern selection means for selecting one actuation pattern of the inverter corresponding to the weather
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: January 13, 1987
    Assignees: Shikoku Denryoku Kabushiki Kaisha, Shikoku Keisoku Kogyo Kabushiki Kaisha
    Inventors: Masahide Takahashi, Seiichi Sakai, Osamu Masada, Masaru Ukawa, Hamao Onishi