Patents by Inventor Yiduk Kwon

Yiduk Kwon 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).

  • Temperature compensated voltage regulator for photovoltaic charging systems
    Patent number: 4349775
    Abstract: A voltage regulator for use in photovoltaic charging of storage batteries includes a temperature compensated reference voltage. The circuitry of the invention permits fixed temperature coefficient and variable temperature coefficient temperature compensated regulation.The voltage regulator comprises an operational amplifier including a linearly temperature dependent current source coupled to an input terminal of said operational amplifier and a voltage source having a selectable voltage which is connected to another input of said operational amplifier, said reference voltage circuit being operable to provide a reference voltage about equal to a maximum charging voltage for said batteries;a comparator for comparing said reference voltage with an output voltage of said photovoltaic array; anda switch responsive to said comparator to inhibit charging whenever said array output exceeds said reference voltage.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: September 14, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventors: Yiduk Kwon, Paul Lawson
  • Source shedding regulator
    Patent number: 4327318
    Abstract: A voltage regulator for controlling the photovoltaic charging of storage batteries selectively includes or sheds portions of the photovoltaic array into or from the charging system.
    Type: Grant
    Filed: October 31, 1980
    Date of Patent: April 27, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventors: Yiduk Kwon, Paul Lawson