Abstract: Disclosed are an apparatus and a method for diagnosing a failure of an electromagnetic-inductive power supply apparatus, which diagnoses whether a power-generation CT has failed by comparing the values detected in a sensor CT and the power-generation CT, thereby preventing the generating efficiency from being reduced. The disclosed apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus detects detection values of a power-generation CT and a sensor CT, converts detection values into converted value by scaling detection values, and diagnoses whether the current transformer has failed and whether the power-outage has occurred based on converted values.

Abstract: Provided are a core for a current transformer and a manufacturing method for the same in which high permittivity is formed in order to optimize electric power acquisition efficiency by magnetic induction at a low current. The provided method of manufacturing a core through the steps of winding a metal ribbon, heat treating a core base, impregnating, cutting and polishing, wherein after the core base which is inserted into a mold is heat treated to implement a shape, the core base separated from the mold is heat treated to manufacture the core for the current transformer having high permittivity.

Abstract: An embodiment of the present disclosure provides an electromagnetic inductive power supply apparatus comprising: an upper housing disposed on the upper side of a lower housing and having an elevating guide; a base disposed above the upper housing; a pressing support disposed on the lower side of the base part and having a guide bar which is coupled to the elevating guide so as to move up and down while being guided by the elevating guide, and one end of which is fastened to the lower housing; a lower core installed in the lower housing; and an upper core installed in the upper housing and forming a magnetic circuit inner space through which a line passes when the upper core is connected to the lower core.

Abstract: The present invention relates to a power control apparatus and method for controlling alternating current power at a ratio set according to the concentration and the water quantity of wastewater, and converting the controlled alternating current power into direct current power so as to treat wastewater. A power control apparatus comprises: a power supply unit for outputting alternating current power; a control unit for setting a fixed cycle and a varying cycle on the basis of at least one of the concentration and the water quantity of wastewater so as to output a control signal; a switch unit for controlling the alternating current power output from the power supply unit in the fixed cycle and the varying cycle on the basis of the control signal; and a rectification unit for rectifying the alternating current power controlled by the switch unit.

Abstract: Presented is an electronic meter for supplying driving power to a battery module charged by wireless power transmission. The presented electronic meter includes a usage detection module for detecting energy usage of a consumer, a control module for generating meter data based on the energy usage detected by the usage detection module, a communication module for transmitting the meter data generated by the control module to a meter reading server or a repeater, a battery module composed of a secondary cell, and for supplying driving power to the usage detection module, the control module, and the communication module, and a wireless power receiving module for receiving power wirelessly from a wireless power transmission device to charge the battery module.

Abstract: A manhole cover and a manhole management system are provided. A manhole cover according to one embodiment includes: a cover body; an electronic unit including at least one sensing unit configured to sense information inside a manhole and at least one communication module configured to transmit information which is obtained through the sensing unit to the outside, and embedded in the cover body; a battery providing driving power to the electronic unit; and a wireless power reception antenna embedded in the cover body to receive wireless power supplied from the outside and provide the wireless power to the battery.

Abstract: Disclosed is an electromagnetic-inductive power supply apparatus, which switches so that a plurality of coils winding around a current transformer core is connected in series to a rectification unit based on the voltage induced in the current transformer, thereby producing the power within the set range even in a state where the voltage outside the reference is induced. The disclosed electromagnetic-inductive power supply apparatus senses the voltage induced in the current transformer and switches the plurality of unit coils is connected to the rectification unit based on the voltage sensed.

Abstract: A wireless headphone having a built-in flexible battery embedded therein. The wireless headphone having a built-in flexible battery includes a band part; a pair of headset parts including speaker units configured to receive a wirelessly transmitted audio signal and output the audio signal to the outside and connected to the band part; and a flexible battery embedded in the band part to supply power to the headset parts.

Abstract: Disclosed is a magnetic induction power supply device, which switches the unit coil having the smallest number of windings to a rectification unit at the initial operation, thereby preventing the parts damaged due to an excessive inrush voltage. The disclosed magnetic induction power supply device switches the unit coil having the smallest number of windings to the rectification unit when emergency power is applied from a first power supply unit or a second power supply unit. The second power supply unit can supply the power source induced in the unit coils to a sensing unit as the emergency power.

Abstract: Disclosed are an apparatus and a method for diagnosing a failure of an electromagnetic-inductive power supply apparatus, which diagnoses whether a power-generation CT has failed by comparing the values detected in a sensor CT and the power-generation CT, thereby preventing the generating efficiency from being reduced. The disclosed apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus detects detection values of a power-generation CT and a sensor CT, converts detection values into converted value by scaling detection values, and diagnoses whether the current transformer has failed and whether the power-outage has occurred based on converted values.

Abstract: Provided is a wireless power transfer antenna core. In the wireless power transfer antenna core according to an exemplary embodiment of the present invention, a conductive member configured to serve as an antenna for transmitting or receiving wireless power is wound multiple times along a longitudinal direction. The wireless power transfer antenna core is made of a magnetic body and comprises: a first portion having a first cross-sectional area; and a second portion extending with a predetermined length from an end of the first portion and second cross-sectional area that is relatively larger than the first cross-sectional area, wherein the conductive member is wound multiple times on the first portion.

Abstract: Disclosed is a core for a current transformer, which forms an upper core in a round shape, and is disposed at a position lower than the center of a power line having both ends of the upper core received, thereby minimizing the stress of a magnetic path, and increases the permeability, thereby enhancing the magnetic induction efficiency. The disclosed core for the current transformer includes an upper core curved in a semi-circular shape to have a receiving groove formed therein, and having both ends extended downwards to be disposed to be spaced apart from each other and a lower core disposed on the lower portion of the upper core, and having both ends extended upwards to be disposed to face both ends of the upper core.

Abstract: A power supply device includes a current transformer module capable of adjusting a power induction ratio in order to induce a certain power even when the current of a power line is changed and the current transformer module capable of minimizing the loss in power conversion while providing a certain power even when the current of the power line is changed. The disclosed current transformer module includes a magnetic core constituting a closed loop, a plurality of unit coils wound around the magnetic core, and a switch unit connected to the plurality of unit coils, and the plurality of unit coils include a plurality of unit coils for power-generation.

Abstract: Provided is a positive temperature coefficient (PTC) unit for a vehicle heater. The PTC unit according to an exemplary embodiment of the present invention includes: a heat generation part which includes PTC elements; and a heat radiation part which is provided on at least one surface of the heat generation part and includes a heat radiation base material and a heat radiation film provided on at least a portion of an outer surface of the heat radiation base material to improve heat radiation performance. According to the present invention, improved heat radiation performance may be exhibited, and concurrently, heat radiation performance due to excellent durability may be exhibited for a long period of time without a structural change for increasing a specific surface area of a heat radiation part while reducing an air ventilation property, so as to improve heat radiation performance.

Abstract: A wireless headphone having a built-in flexible battery embedded therein. The wireless headphone having a built-in flexible battery includes a band part; a pair of headset parts including speaker units configured to receive a wirelessly transmitted audio signal and output the audio signal to the outside and connected to the band part; and a flexible battery embedded in the band part to supply power to the headset parts.

Abstract: Disclosed is an LED lamp using a switching circuit, configured to prevent occurrence of electric shock caused by a contact of a conductive metal or the human body by arranging the switching circuit between a first rectifier circuit and an LED circuit. The disclosed LED lamp using a switching circuit connects the switching circuit to at least one line among a plurality of lines connecting a rectifier circuit and an LED circuit, wherein the switching circuit may comprise: a switching element comprising at least one from among an SCR, a TRIAC, a TR, and an FET; and a driving element comprising at least one from among a capacitor, a TVS, a ZENER, a SIDAC, a resistance, and an inductor.

Abstract: Disclosed is an LED lamp using a switching circuit, configured to prevent occurrence of electric shock caused by a contact of a conductive metal or the human body by arranging the switching circuit between a first rectifier circuit and an LED circuit. The disclosed LED lamp using a switching circuit connects the switching circuit to at least one line among a plurality of lines connecting a rectifier circuit and an LED circuit, wherein the switching circuit may comprise: a switching element comprising at least one from among an SCR, a TRIAC, a TR, and an FET; and a driving element comprising at least one from among a capacitor, a TVS, a ZENER, a SIDAC, a resistance, and an inductor.