Patents by Inventor Hijung CHAI

Hijung CHAI 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).

  • Patent number: 11966243
    Abstract: This invention relates to a method and apparatus for power factor adjustment in a waveguide circuit or a transmission line circuit. In this invention, it is shown that, in a waveguide circuit or a transmission line circuit, the power supplied by the source and the impedance can be adjusted by controlling the amount of the phase change of the signal when it propagates through the (equivalent) transmission line once the medium, the structure, and the load of the waveguide circuit or the transmission line circuit are chosen. It is also shown that, by choosing an appropriate frequency, transmission line, and load, one can achieve the negative power factor of the (equivalent) transmission line circuit, and also make the power delivered from the source be lesser than that consumed at the load.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: April 23, 2024
    Assignee: PHASETOWN, LLC
    Inventors: Won Don Lee, Hijung Chai
  • Publication number: 20240004414
    Abstract: This invention relates to a method and apparatus for power factor adjustment in a waveguide circuit or a transmission line circuit. In this invention, it is shown that, in a waveguide circuit or a transmission line circuit, the power supplied by the source and the impedance can be adjusted by controlling the amount of the phase change of the signal when it propagates through the (equivalent) transmission line once the medium, the structure, and the load of the waveguide circuit or the transmission line circuit are chosen. It is also shown that, by choosing an appropriate frequency, transmission line, and load, one can achieve the negative power factor of the (equivalent) transmission line circuit, and also make the power delivered from the source be lesser than that consumed at the load.
    Type: Application
    Filed: March 27, 2020
    Publication date: January 4, 2024
    Inventors: Aquila Hwan LEE, Eunhye Grace LEE, Younghye Gloria LEE, Inhye LEE, Won Don LEE, Hijung CHAI
  • Publication number: 20230282412
    Abstract: A power generating transformer system (PGTS) where the core of the transformer has one of the generalized configurations is presented. Also, a power factor correction method in a power generating transformer system (PGTS) and a PGTS functioning also as power supply are presented. A PGTS generates an AC voltage with the frequency which lets the desired relative phase which is the difference between the phase of the flux at the primary coil and that of the flux at the secondary coil be in a specified range. And by controlling the reactive power at the primary coil of the transformer of the transformer circuit or at the location where the AC voltage is generated, the power factor correction is done using one or more components in the transformer circuit (TC). Finally, block diagrams of PGTS are presented.
    Type: Application
    Filed: February 10, 2020
    Publication date: September 7, 2023
    Applicant: PHASETOWN, LLC
    Inventors: Won Don LEE, Hijung CHAI
  • Patent number: 10978979
    Abstract: In this work, it is shown for the first time that the power and the impedance in a transformer circuit depend on the phase of the flux, hence the phase of the current. There is a phase change when the flux travels the magnetic core, and formulas for the effect of the phase change in the power and the impedance are derived. Therefore, the power factor can be adjusted so that the power is delivered more at the load than that, at the primary supplied by the source.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: April 13, 2021
    Assignee: PHASETOWN, LLC
    Inventors: Won Don Lee, Hijung Chai, Aquila Hwan Lee
  • Publication number: 20200336094
    Abstract: In this work, it is shown for the first time that the power and the impedance in a transformer circuit depend on the phase of the flux, hence the phase of the current. There is a phase change when the flux travels the magnetic core, and formulas for the effect of the phase change in the power and the impedance are derived. Therefore, the power factor can be adjusted so that the power is delivered more at the load than that, at the primary supplied by the source.
    Type: Application
    Filed: December 12, 2017
    Publication date: October 22, 2020
    Applicant: PHASETOWN, LLC
    Inventors: Won Don LEE, Hijung CHAI, Aquila Hwan LEE