| Myongji University Industry and Academia Cooperation Foundation Patent applications |
| Patent application number | Title | Published |
|---|
| 20110090717 | Two-stage insulated bidirectional DC/DC power converter using a constant duty ratio LLC resonant converter - A two-stage insulated bidirectional DC/DC power converter is disclosed. A two-stage insulated bidirectional DC/DC power converter according to an embodiment of the invention has the characteristic of including: an LLC resonant converter operating at a constant duty ratio; a bidirectional converter joined to a front part of the LLC resonant converter and configured to perform a booster converter function of outputting the input voltage at a consistent input voltage for the LLC resonant converter, and a buck converter function of reducing the voltage by way of the LLC resonant converter and then outputting a consistent voltage; and a bidirectional converter control unit configured to control changes in an input voltage of the bidirectional converter and regulate an output voltage of the LLC resonant converter to thereby maintain a consistent input voltage of the LLC resonant converter, such that the LLC resonant converter operates at a constant duty ratio. | 04-21-2011 |
| 20100304031 | Method of preparing a green-ceramic pigment for reduction firing using copper oxide and a green ceramic made thereby - A method of preparing a green-ceramic pigment for reduction firing using copper oxide that includes mixing tin oxide (SnO | 12-02-2010 |
| 20090299666 | Fourier Transform-Based Phasor Estimation Method and Apparatus Capable of Eliminating Influence of Exponentially Decaying DC Offsets - Disclosed herein is a Fourier transform-based phasor estimation method and apparatus capable of eliminating the S influence of exponentially decaying DC offsets. According to a Fourier transform-based phasor estimation method according to an embodiment of the present invention, an input signal is sampled, and samples of one-cycle data of the input signal are separated into at least two sample groups. A Discrete Fourier Transform (DFT) is performed on each of the sample groups. A DC offset included in the input signal is calculated on a basis of results of the DFT on each of the sample groups, and an error caused by the DC offset is calculated using the calculated DC offset. A phasor of a fundamental frequency component included in the input signal is estimated by eliminating the calculated error, caused by the DC offset, from the results of the DFT on the input signal. | 12-03-2009 |
| 20090243541 | METHOD AND APPARATUS FOR RECHARGING BATTERY OF MOBILE STATION USING ELECTROMAGNETIC RESONANT WAVE - A method and apparatus for recharging a battery of a mobile station are provided which can re-receive a signal emitted from an electromagnetic resonant circuit and automatically recharge the battery having the smallest remaining amount sequentially when a quantity of electric charges remaining in the battery is equal to or less than a reference value while the mobile station is utilizing a mobile communication service. The method includes the steps of: radiating the signal emitted from the electromagnetic resonant circuit; re-receiving the signal emitted from the electromagnetic resonant circuit; activating a conversion of power of the re-received signal; and charging the battery on the basis of a signal obtained by rectifying the re-received signal in accordance with the conversion of power. | 10-01-2009 |
| 20080230389 | Electrochemical Detector Integrated on Microfabricated Capillary Electrophoresis Chip and Method of Manufacturing the Same - An electrochemical detector integrated on a capillary electrophoresis chip according to the present invention includes: a first substrate having a microchannel; a second substrate adapted to mate with the first substrate and having at least one peripheral electrode for conducting electrophoresis of a sample injected along the microchannel of the first substrate, in which a separation channel is formed along the microchannel by bonding the first substrate with the second substrate; a first electrode, made of indium tin oxide (ITO), formed on the first substrate to be positioned over the separation channel; and a second electrode, made of indium tin oxide (ITO), formed on the second substrate to be positioned under the separation channel, and spaced apart from the first electrode at a predetermined interval, wherein the first electrode and the second electrode constitute a detector to measure electrical characteristics of the sample passing along the separation channel. According to the present invention, since the specific characteristics of a sample can be evaluated by measuring the electrical or genetic characteristics of the sample flowing along the microchannel formed in a chip using a detector, a chip for a micro-analysis system having a simple structure can be realized. | 09-25-2008 |
| 20080211511 | Method of Generating Fault Indication in Feeder Remote Terminal Unit for Power Distribution Automation System - The present invention relates to a method of generating fault indication in a feeder remote terminal unit for a power distribution automation system. The method is performed in a distribution system that includes a plurality of feeder remote terminal units, which are installed in respective sections of a line and are configured to measure voltage, current and a phase difference of the line, and a central control unit for determining whether a fault occurs and controlling operation of the feeder remote terminal units. In the method, phases are measured by each of the feeder remote terminal units. The phase of a zero-sequence current is compared with that of a zero-sequence voltage. A direction of a fault current is calculated, and fault indication information is generated in the calculated direction of the fault current. | 09-04-2008 |
