Abstract: Proposed is an earth leakage breaker having a built-in trip module type circuit breaker, which is installed at a line between a power supply and a load and has a trip module configured to cut the line off, the earth leakage breaker including: a CT installed on the line and configured to monitor an instantaneous current; and a control circuit unit comprising: an operation module configured to receive an instantaneous current sensed by the CT, to measure an instantaneous current value per unit time, and to calculate a slope of the instantaneous current per unit time; a determination module configured to determine a case as an overload state, the case having the slope exceeding an overcurrent determination value A, and to cause an overload state determination signal to be output; and an output module configured to output a trip module actuation signal according to the overload state determination signal of the determination module and to cut off the line, and accordingly, the earth leakage breaker causes the tri

Abstract: A tiling display apparatus includes a set board configured to generate a control command signal and a plurality of display modules connected to one another through a first interface circuit based on a serial communication scheme, for executing a target operation corresponding to the control command signal, and the first interface circuit is implemented with a bidirectional serial interface having a feedback loop type between adjacent display modules of the plurality of display modules.

Abstract: Disclosed is a head mounted display device. The head mounted display device includes a head mount unit wearable on a head of a user, a display unit supported on the head mount unit and sending an image to eyes of the user, and a position adjustment unit coupled to the head mount unit, connected to the display unit, and moving the display unit relative to the head mount unit such that a position of the display unit varies with respect to the eyes of the user.

Abstract: In some embodiments, a data access apparatus includes a memory device including a plurality of addresses, an address mapping unit configured to map the addresses of the memory device with respective predetermined addresses such that they correspond to each other, a data division unit, a data mapping unit configured to map respective predetermined specific addresses in regions divided by the data division unit, and a control unit configured to control the data such that the data is stored in the addresses of the memory device mapped with the respective specific addresses in the regions divided by the data division unit.

Abstract: A system for charging a battery of an energy storage system using a photovoltaic inverter, includes: a photovoltaic inverter configured to convert a DC power generated from a photovoltaic module into an AC power, and to output the AC power; and an energy storage system configured to set a preset power value by considering an output power of the photovoltaic inverter according to the amount of solar radiation, and configured to charge a battery in a mode selected from a constant current (CC) mode and a constant voltage (CV) mode based on a comparison result obtained by comparing the preset power value, with an input power generated from the photovoltaic module and input from the photovoltaic inverter.

Abstract: This invention relates to a photovoltaic inverter, capable of connecting a plurality of photovoltaic modules to each input port of a multi-string photovoltaic inverter through a single booster. The photovoltaic inverter disclosed herein includes a plurality of input portions connected in series to a plurality of photovoltaic modules, respectively, a plurality of reactors connected in series to the plurality of input portions, respectively, a first capacitor configured to charge DC voltages of the plurality of photovoltaic modules, respectively, transferred through the plurality of input portions, a first resistor connected in parallel to the first capacitor, a booster unit connected in parallel to the first capacitor and the first resistor connected in parallel to each other, and configured to boost the voltages charged in the first capacitor, and an inverter unit configured to convert the voltage boosted by the booster unit into an AC voltage to provide to a grid.

Abstract: Disclosed are a single-phase photovoltaic inverter and a control method thereof in which a small insulated transformer and an ordinary current transformer are used to measure a leakage current instead of a high-priced current transformer that is only used to measure a leakage current. The single-phase photovoltaic inverter that converts DC electric power supplied from a single-phase photovoltaic module into AC electric power includes an input terminal including a first input terminal connecting to a positive polarity of the single-phase photovoltaic module and a second input terminal connecting to a negative polarity of the single-phase photovoltaic module, an inverter unit configured to convert DC electric power supplied through the input terminal into AC electric power and supply the converted AC electric power to a grid, and a leakage current measuring unit connected in parallel with the inverter unit and configured to measure a leakage current delivered through the input terminal.

Abstract: In some embodiments, a data access apparatus includes a memory device including a plurality of addresses, an address mapping unit configured to map the addresses of the memory device with respective predetermined addresses such that they correspond to each other, a data division unit, a data mapping unit configured to map respective predetermined specific addresses in regions divided by the data division unit, and a control unit configured to control the data such that the data is stored in the addresses of the memory device mapped with the respective specific addresses in the regions divided by the data division unit.

Abstract: Provided are a parallel communication device and a communication method thereof. The parallel communication device includes: a first receiving terminal receiving communication data transmitted through a master device; a first transmitting terminal transmitting the communication data received through the first receiving terminal to a slave device; a switch managing a communication line disposed between the first transmitting terminal and a plurality of slave devise; and a control unit confirming a first slave device to which the communication data are to be transmitted by using destination information in the communication data, and transmitting the received communication data to the confirmed first slave device.

Abstract: Disclosed are a single-phase photovoltaic inverter and a control method thereof in which a small insulated transformer and an ordinary current transformer are used to measure a leakage current instead of a high-priced current transformer that is only used to measure a leakage current. The single-phase photovoltaic inverter that converts DC electric power supplied from a single-phase photovoltaic module into AC electric power includes an input terminal including a first input terminal connecting to a positive polarity of the single-phase photovoltaic module and a second input terminal connecting to a negative polarity of the single-phase photovoltaic module, an inverter unit configured to convert DC electric power supplied through the input terminal into AC electric power and supply the converted AC electric power to a grid, and a leakage current measuring unit connected in parallel with the inverter unit and configured to measure a leakage current delivered through the input terminal.

Abstract: A system for charging a battery of an energy storage system using a photovoltaic inverter, includes: a photovoltaic inverter configured to convert a DC power generated from a photovoltaic module into an AC power, and to output the AC power; and an energy storage system configured to set a preset power value by considering an output power of the photovoltaic inverter according to the amount of solar radiation, and configured to charge a battery in a mode selected from a constant current (CC) mode and a constant voltage (CV) mode based on a comparison result obtained by comparing the preset power value, with an input power generated from the photovoltaic module and input from the photovoltaic inverter.

Abstract: This invention relates to a photovoltaic inverter, capable of connecting a plurality of photovoltaic modules to each input port of a multi-string photovoltaic inverter through a single booster. The photovoltaic inverter disclosed herein includes a plurality of input portions connected in series to a plurality of photovoltaic modules, respectively, a plurality of reactors connected in series to the plurality of input portions, respectively, a first capacitor configured to charge DC voltages of the plurality of photovoltaic modules, respectively, transferred through the plurality of input portions, a first resistor connected in parallel to the first capacitor, a booster unit connected in parallel to the first capacitor and m the first resistor connected in parallel to each other, and configured to boost the voltages charged in the first capacitor, and an inverter unit configured to convert the voltage boosted by the booster unit into an AC voltage to provide to a grid.

Abstract: Disclosed are an apparatus and a method for photovoltaic power generation according to the exemplary embodiment of the present disclosure configured to enhance efficiency of photovoltaic power generation, wherein the apparatus having a solar module, a booster and an inverter includes a voltage sensing unit configured to sense an output voltage of the solar module, a switching unit connected to the booster in parallel, and a controller configured to selectively control the booster or the switching unit whereby the booster or the switching unit can be driven in response to an output voltage level sensed by the voltage sensing unit.

Abstract: Provided are a parallel communication device and a communication method thereof. The parallel communication device includes: a first receiving terminal receiving communication data transmitted through a master device; a first transmitting terminal transmitting the communication data received through the first receiving terminal to a slave device; a switch managing a communication line disposed between the first transmitting terminal and a plurality of slave devise; and a control unit confirming a first slave device to which the communication data are to be transmitted by using destination information in the communication data, and transmitting the received communication data to the confirmed first slave device.