Abstract:
본 발명은 루프형태의 전자파 차폐장치에 관한 것으로서, 더욱 상세하게는 자기장 차폐를 위한 루프에 있어서, 그 루프를 관통하는 페라이트(ferrite) 코어를 적용한 루프형태의 전자파 차폐장치에 관한 것이다. 본 발명에 의하면, 자기장 차폐를 위한 루프에 있어서, 그 루프를 관통하는 페라이트(ferrite) 코어를 적용하여 적은 전류로 상쇄 자기장을 크게 만들 수 있도록 함으로써, 급집전 장치간 발생하는 대전력 누설 자기장을 적은 전류로도 효과적으로 차단할 수 있도록 하는, 루프형태의 전자파 차폐장치를 제공한다.
Abstract:
본 발명은 전류 센서를 이용한 자동제어 역전류 차폐장치에 관한 것으로서, 더욱 상세하게는 전류가 흐르는 전선 주변에 역방향 전류를 흐르게 하여 전자파를 차폐하되, 전류 센서를 이용하여 역방향 전류를 지속적으로 자동 제어하는 장치에 관한 것이다. 본 발명은 전류가 흐르는 전선 주변에 역방향 전류를 흐르게 함으로써 전자파를 차폐하며, 또한 발생하는 전류를 지속적으로 측정하여 자동으로 역방향 전류를 최적으로 제어함으로써 전자파의 발생을 최소화하도록 한다.
Abstract:
PURPOSE: A loop type electromagnetic wave shielding apparatus including an automatic controller, a power supply apparatus and a current collector including the same, and an electromagnetic wave shielding method using a loop are provided to form an optimal shield condition by automatically controlling capacitance of a capacitor connected to a loop. CONSTITUTION: A leakage magnetic field generator(10) generates a leakage magnetic field to be shielded. The leakage magnetic field reduces through a closed loop(110). A magnetic field sensor part(121) senses a magnetic field generated from the closed loop. An EMF(Electromagnetic Field) size sensor(122) senses the size of a transmitted magnetic field. A capacitance calculating part(123) calculates capacitance of a capacitor for appropriately reducing the magnetic field measured from transmitted size information of the magnetic field. An on/off control signal of each switch in a switch array(124) is applied to each capacitor in order to control the capacitance of a capacitor array(125).
Abstract:
PURPOSE: A wireless power transfer device for reducing the amount of leaked electromagnetic waves is provided to connect a secondary coil of a current collecting device in parallel, thereby suppressing electromagnetic waves due to a magnetic field and an electric field. CONSTITUTION: A first coil(53) is arranged on a power supply core(51) of a power supply device(50). A magnetic field H-field is generated by a current applied to a primary coil. A B-field is generated by multiplying the generated H-field with the permeability of a magnetic material. A secondary coil(73) is wound on a current collecting core(71) of a current collecting device(70). The current collecting device is made by a twist pair cable or a pair cable.
Abstract:
PURPOSE: An automatically controlled apparatus and method for shielding a reverse current using a current sensor are provided to automatically optimize a reverse current by inducing a reverse current to flow around a wire. CONSTITUTION: A magnetic field generating device(70) generates a leakage magnetic field(711) to be shielded. A current sensor unit(721) senses a current flowing in a coil of the magnetic field generating device. The current sensor unit transmits the sensed current signal to a current size sensing unit(722) of a controller block. The current size sensing unit senses the size of the current from the transmitted current signal. A phase detection unit(723) detects the phase of the current from the current signal detected from the current sensor unit. A shield current calculation unit(724) produces proper size and phase values of the shield current from size and phase information of the current.
Abstract:
PURPOSE: An electromagnetic wave shielding device of a loop type is provided to effectively block a high power leakage magnetic field with low current. CONSTITUTION: An electromagnetic wave shielding device of a loop type includes a shielding coil(331), a capacitor(333), and a ferrite core(332). A shielding coil of a loop type is installed at an electronic wave generation part of an electric device. A capacitor is installed a specific location of the shielding coil and provides low impedances to the shielding coil in a high frequency band. The ferrite core is installed to pass through the shielding coil of the loop type. [Reference numerals] (AA) Progress direction of a moving body;
Abstract:
PURPOSE: An automatically controlled apparatus and method for shielding a reverse current using a magnetic field sensor capable of minimizing the generation of electromagnetic waves and a method thereof are provided to shield electromagnetic waves by applying a reverse current around a wire. CONSTITUTION: A magnetic field generating device(60) generates a leakage magnetic field(611) to be shielded. A magnetic field sensor part(621) transmits a detected leakage magnetic field signal to an EMF(Electromagnetic Field) size detecting part(622) in a controller block by sensing a leakage magnetic field. The EMF size detecting part transmits a size value of a magnetic field to a shield current calculation part(624). A phase detection part(623) detects a phase of the magnetic field from the leakage magnetic field signal detected from the magnetic field detecting part. The shield current calculation part produces proper size and phase values of the shield current flowing in the shielding coil from size and phase information of the leakage magnetic field.
Abstract:
PURPOSE: A wireless power transmission system including a magnetic shielding film for minimizing magnetic field interference between adjacent coils is provided to improve magnetic coupling between a primary coil and a secondary coil by minimizing the magnetic coupling between primary coils or between secondary coils. CONSTITUTION: A power supply apparatus includes a power supply core(511) and a plurality of power supply coils(512) corresponding to a primary coil. A magnetic shield film(513) using a magnetic material is installed between pluralities of primary coils. The magnetic shield film minimizes magnetic coupling between the primary coils. The magnetic shield film prevents an H Field generated from the primary power supply coil from being transmitted to adjacent second, third, and fourth coils.
Abstract:
PURPOSE: An apparatus for shielding electromagnetic waves using a reverse current is provided to shield the electromagnetic waves by applying the reverse current around a wire. CONSTITUTION: A shielding coil(313) for a power supply device(310) is arranged on a shielding position in order to shield a magnetic field due to a current flowing in a power supply coil(312) of the power supply device. The shielding coil for the power supply device removes a magnetic field by compulsively applying the current in a reverse direction of the current in the power supply coil. The shielding coil for the power supply device is arranged in the shielding position in order to shield the magnetic field due to the current flowing in a current collecting coil of the current collector. The shielding coil for the current collector removes the magnetic field by compulsively applying the current in the reverse direction of the current in the power supply coil.