Patents by Inventor Ju Won Bak

Ju Won Bak 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 conditioning system and method employing parallel and series connection structures
    Patent number: 8995155
    Abstract: A photovoltaic power conditioning system and method is provided. The system includes an isolated DC/DC converter (41), a DC/AC inverter (42), and a sine filter (43). The isolated DC/DC converter (41) receives a DC voltage from a solar cell through a parallel connection structure and converts the DC voltage into another DC voltage and then outputs the converted DC voltage through a series connection structure. The DC/AC inverter (42) converts the DC voltage output from the isolated DC/DC converter into an AC voltage. The sine filter (43) performs sine filtering on the AC voltage output from the DC/AC inverter and outputs the filtered AC voltage. The system employs a topology allowing it to be responsible for part of the output capacity, thereby significantly reducing the required capacity and increasing the system efficiency, so that the system can be applied to small and large-capacity photovoltaic power generation.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: March 31, 2015
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Byung Duk Min, Dong Wook Yoo, Ju Won Bak, Tae Jin Kim, Jong Hyun Kim, Myung Hyo Ryu, Jong Pil Lee
  • PHOTOVOLTAIC POWER CONDITIONING SYSTEM AND METHOD
    Publication number: 20100142227
    Abstract: A photovoltaic power conditioning system and method is provided. The system includes an isolated DC/DC converter (41), a DC/AC inverter (42), and a sine filter (43). The isolated DC/DC converter (41) receives a DC voltage from a solar cell through a parallel connection structure and converts the DC voltage into another DC voltage and then outputs the converted DC voltage through a series connection structure. The DC/AC inverter (42) converts the DC voltage output from the isolated DC/DC converter into an AC voltage. The sine filter (43) performs sine filtering on the AC voltage output from the DC/AC inverter and outputs the filtered AC voltage. The system employs a topology allowing it to be responsible for part of the output capacity, thereby significantly reducing the required capacity and increasing the system efficiency, so that the system can be applied to small and large-capacity photovoltaic power generation.
    Type: Application
    Filed: December 28, 2006
    Publication date: June 10, 2010
    Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
    Inventors: Byung Duk Min, Dong Wook Yoo, Ju Won Bak, Tae Jin Kim, Jong Hyun Kim, Myung Hyo Ryu, Jong Pil Lee