Abstract: A startup method of a semiconductor transformer, according to the present invention, comprises: a link capacitor initiating step in which a control unit controls a link capacitor voltage of a link capacitor between an AC/DC converter and a DC/DC converter connected thereto in series to reach an initial reference value, and stores link power; an output capacitor initiating step in which the control unit controls an output capacitor voltage of an output capacitor configured in an output of the DC/DC converter to reach an initial reference value, and stores output power; a link capacitor stabilizing step in which the control unit controls the link capacitor such that the link capacitor voltage of the link capacitor reaches a stable reference value; and an output capacitor stabilizing step in which the control unit controls the output capacitor such that the output capacitor voltage of the output capacitor reaches a stable reference value.

Abstract: Provided are a device and method for SoC balance control for a delta structure semiconductor transformer-based energy storage device, for operating a charging and discharging time of a system by controlling balance of battery SoC of a PCS connected by a delta connection so as to prevent overdischarging and overcharging of a specific battery, controlling a zero-phase-sequence component of the delta connection to balance the battery SoC for each phase, and controlling balance of an individual battery SoC. The device for SoC balance control for a delta structure semiconductor transformer-based energy storage device of the present invention is composed of an SoC balance control device that controls charging and discharging of a battery such that, in a PCS that performs charging and discharging from three-phase AC power, an A-phase, a B-phase, and a C-phase PCS connected by a delta connection, and the battery SoC of the PCS, are balanced.

Abstract: Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al based steel sheet plating layer provided on at least one surface of the base steel sheet; and an Fe—Al based inhibition layer provided between the base steel sheet and the Zn—Mg—Al based plating layer, wherein the plating layer comprises, in wt %: 4% or more of Mg; 2.1 times or more of Mg content and 14.2% or less of Al; 0.2% or less (including 0%) of Si; 0.1% or less (including 0%) of Sn; the remainder Zn; and unavoidable impurities.

Abstract: An embodiment of the present disclosure provides a hot dip alloy coated steel material having high corrosion resistance, the hot dip alloy coated steel material including: a base steel sheet; and a hot dip alloy coating layer formed on the base steel sheet, wherein the hot dip alloy coating layer includes, by wt %, Al: from greater than 8% to 25%, Mg: from greater than 4% to 12%, and a balance of Zn and other inevitable impurities, wherein a surface of the hot dip alloy coating layer has a surface X-ray diffraction intensity satisfying Condition 1 below: [Condition 1] 2000 cps?X-ray diffraction intensity?20000 cps where the X-ray diffraction intensity refers to M?N, M refers to a greatest peak intensity within a 2? range of 20.00° to lower than 21°, and N refers to a peak intensity at 2?=20.00°.

Abstract: An aqueous secondary battery including: a positive electrode; a negative electrode; a separator; and an aqueous electrolytic solution including water and a metal salt represented by Chemical Formula 1 AxDy and having molality of about 5 M to about 40 M wherein in Chemical Formula 1, A is at least one metal ion selected from a sodium ion, a potassium ion, a magnesium ion, a calcium ion, a strontium ion, a zinc ion, or a barium ion, D is at least one type of atomic group ion selected from Cl?, SO42?, NO3?, ClO4?, SCN?, CF3SO3?, C4F3SO3?, (CF3SO2)2N?, AlO2?, AlCl4?, AsF6?, SbF6?, BR4?, and PO2F2?, and 0<x?2, and 0<y?2.

Abstract: An exemplary embodiment in the present disclosure provides a hot-dip Zn—Al—Mg-based alloy-plated steel material having excellent corrosion resistance in a processed portion, and a method for manufacturing the same. The steel material includes: an iron substrate; and a hot-dip alloy-plated layer formed on the iron substrate, wherein the hot-dip alloy-plated layer contains, by wt %, more than 8% to 25% of Al, more than 4% to 12% of Mg, and a balance of Zn and inevitable impurities, a fraction of a MgZn2 phase in the hot-dip alloy-plated layer is 10 to 45 area %, cracks are formed inside the MgZn2 phase, and the number of cracks present per 100 ?m in a direction perpendicular to a thickness direction of a steel sheet in a field of view in which the cracks are observed based on a cross section in the thickness direction of the steel sheet is 3 to 80.

Abstract: A hot-dipped galvanized steel sheet having excellent bending workability and corrosion resistance and a manufacturing method therefor are provided. A hot-dipped galvanized steel sheet of the present invention comprises: a base steel sheet; a Zn—Mg—Al based plating layer provided on at least one surface of the base steel sheet and including, in wt %, with respect to components other than iron (Fe) diffused from the base steel sheet, 5.1 to 25% of Al and 4.0-10% of Mg, and the remainder of Zn and other inevitable impurities; and an interfacial alloy layer having a Fe—Al—Zn composition formed between the base steel sheet and the plating layer, wherein the interfacial alloy layer has a thickness of 0.

Abstract: Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al plating layer provided on at least one surface of the base steel sheet; and an Fe—Al inhibition layer provided between the base steel sheet and the Zn—Mg—Al plating layer. The plating layer comprises, by weight %, 4 to 10% of Mg and 5.1-25% of Al and the remainder being Zn and unavoidable impurities with respect to components not including iron (Fe) diffused from the base steel sheet. The plating layer comprises a 24-50% MgZn2 phase in phase fraction. In the MgZn2 phase, an Al single phase is present in the ratio of 1-30% relative to the cross-sectional area of the total MgZn2 phase.

Abstract: The present disclosure relates to a sodium-ion storage material and an electrode material for a sodium-ion battery, an electrode material for a seawater battery, an electrode for a sodium-ion battery, an electrode for a seawater battery, a sodium-ion battery, and a seawater battery, which include the sodium-ion storage material. Specifically, the sodium-ion storage material may include one or more materials selected from the group consisting of CuxS, FeS, FeS2, Ni3S, NbS2, SbOx, SbSx, SnS and SnS2, wherein 0<x?2. When the sodium-ion storage material according to the present disclosure is used, it may exhibit high discharge capacity, and when the sodium-ion storage material is applied to a sodium-ion battery which is a secondary battery, it may exhibit excellent charge/discharge cycle characteristics.

Abstract: An aqueous secondary battery according to an embodiment includes: a positive electrode; a negative electrode; a separator; and an aqueous electrolytic solution including water and a metal salt represented by Chemical Formula 1 and having molarity of about 5 m to about 40 m. AxDy??[Chemical Formula 1] In Chemical Formula 1, A is at least one metal ion selected from a sodium ion, a potassium ion, a magnesium ion, a calcium ion, a strontium ion, a zinc ion, or a barium ion, D is at least one type of atomic group ion selected from Cl?, SO42?, NO3?, ClO4?, SCN?, CF3SO3?, C4F9SO3?, (CF3SO2)2N?, AlO2?, AlCl4?, AsF6?, SbF6?, BF4?, and PO2F2?, and 0<x?2, and 0<y?2.

Abstract: Disclosed herein is a slit-firing speaker apparatus capable of full frequency band reproduction. The speaker apparatus includes a speaker unit configured to generate sound, an enclosure, in which the speaker unit is installed, configured to block rearward sound to prevent the rearward sound of the speaker unit from being mixed with forward sound of the speaker unit, and a reflection plate configured to cover the speaker unit and coupled to the enclosure to form an acoustic path through which the generated sound travels. The acoustic path includes a radiation part formed at one end of the acoustic path and radiating the generated sound, and an opening part formed at the other end of the acoustic path.

Abstract: A broadcast receiver includes a mode determination unit to determine a current operation mode among a plurality of operation modes, a communication interface to transmit the determined current operation mode to a mobile device through interactive communication, and to receive a control command from the mobile device, and a controller to provide a service of the determined current operation mode according to the control command received from the mobile device. Accordingly, a user controls the broadcast receiver through the mobile device according to the operation mode so that user's convenience is improved.

Abstract: An apparatus and a method of forming a localized vibration field are provided. The apparatus includes: a plate; a plurality of exciters disposed at a plurality of locations in neighborhood of circumference of the plate and configured to excite the plate; and a driving controller configured to vibrate the plurality of exciters by using a substantially same excitation frequency, wherein the plurality of exciters excite a local region of the plate and suppress vibrations of a rest of regions except the local region of the plate.

Abstract: A broadcast receiver includes a mode determination unit to determine a current operation mode among a plurality of operation modes, a communication interface to transmit the determined current operation mode to a mobile device through interactive communication, and to receive a control command from the mobile device, and a controller to provide a service of the determined current operation mode according to the control command received from the mobile device. Accordingly, a user controls the broadcast receiver through the mobile device according to the operation mode so that user's convenience is improved.

Abstract: A broadcast receiver includes a mode determination unit to determine a current operation mode among a plurality of operation modes, a communication interface to transmit the determined current operation mode to a mobile device through interactive communication, and to receive a control command from the mobile device, and a controller to provide a service of the determined current operation mode according to the control command received from the mobile device. Accordingly, a user controls the broadcast receiver through the mobile device according to the operation mode so that user's convenience is improved.

Abstract: A broadcast receiver includes a mode determination unit to determine a current operation mode among a plurality of operation modes, a communication interface to transmit the determined current operation mode to a mobile device through interactive communication, and to receive a control command from the mobile device, and a controller to provide a service of the determined current operation mode according to the control command received from the mobile device. Accordingly, a user controls the broadcast receiver through the mobile device according to the operation mode so that user's convenience is improved.

Abstract: Disclosed herein is a slit-firing speaker apparatus capable of full frequency band reproduction. The speaker apparatus includes a speaker unit configured to generate sound, an enclosure, in which the speaker unit is installed, configured to block rearward sound to prevent the rearward sound of the speaker unit from being mixed with forward sound of the speaker unit, and a reflection plate configured to cover the speaker unit and coupled to the enclosure to form an acoustic path through which the generated sound travels. The acoustic path includes a radiation part formed at one end of the acoustic path and radiating the generated sound, and an opening part formed at the other end of the acoustic path.