Abstract:
PURPOSE: A loop switching device for an automatic switcher is provided to actuate a circuit of a controller block without a separate power supply device, thereby reducing the unit cost of an electric vehicle. CONSTITUTION: A connecting unit connects a part of a cable for offsetting magnetic field to a rectifier. A current connecting unit delivers the current in the rectifier to a controller block. The controller block includes an EMF amplitude detector. A capacitor block includes a switch array and a capacitor array. [Reference numerals] (AA) Power supply
Abstract:
PURPOSE: A shielding apparatus using phase differences is provided to minimize the leakage of electromagnetic waves by arranging a plurality of current collectors crossed. CONSTITUTION: A first and fourth current collection coils are inductive coils. A second and third current collection coils are capacitive coils. The first and fourth coils are arranged to have opposite phases to each other. The second and third coils are arranged to have opposite phases to each other.
Abstract:
PURPOSE: A magnetic field sensor capable of tracking an optimal power feed position is provided to efficiently transmit electricity to a vehicle or a moving body in radio. CONSTITUTION: A magnetic field sensor(100) capable of tracking an optimal power feed position includes a plurality of magnetic sensors(110) and an AD(Analog to Digital) converter(120). A plurality of magnetic field sensors is resonated in radio power transmission frequency. The AD converter converts the voltage or the current obtained through the resonance in the magnetic field sensor and outputs it. [Reference numerals] (130) Controller
Abstract:
PURPOSE: A device for automatically tracing an optimal feeding position is provided to automatically trace positions for the optimal feeding and collection of a moving object or a vehicle. CONSTITUTION: Magnetic field sensors(111,112) resonate a wireless power transmission frequency by using a coil and a condenser. A-D converters(121,122) convert a voltage or a current obtained through the resonance in the magnetic field sensors into a digital value and output the same. A control unit(130) checks the intensity of a magnetic field from a plurality of values outputted from the A-D converters. The control unit controls a steering device(140) of a moving object. An LED or an LED display device(150) displays the intensity of the magnetic field by using various colors.
Abstract:
PURPOSE: A method for controlling a variable capacity condenser for a high voltage and a high current is provided to prevent damage to a condenser caused by a rapid increase in currents around a resonance point by controlling a connection method of the condenser and a sensor. CONSTITUTION: Damage to a condenser is prevented by controlling a connection method of a condenser and a sensor. The capacity of the condenser is controlled by monitoring current changes through the sensor so that a current more than a damage threshold of the condenser is not flowed. Damage to the condenser, caused by a rapid increase in currents around a resonance point, is prevented.
Abstract:
PURPOSE: A variable capacity condenser for high voltage and high current of a structure with multiple pole plates is provided to easily adjust a value, thereby obtaining a precise resonance point in any circumstances. CONSTITUTION: Two electrodes(10) are faced with each other. Intervals of the electrodes are broadened and narrowed by using a worm gear and a motor. An end part of an electrode is sharply formed. A high frequency condenser of high voltage and high current adjusts a high capacity value.
Abstract:
PURPOSE: A variable capacity condenser for high voltage and high current of single pole plate structure is provided to precisely control a capacity value of the condenser, thereby obtaining a precise resonance point in any circumstances. CONSTITUTION: Two electrodes(10) are faced with each other. Intervals(d) of the two electrodes are broadened and narrowed by using a worm gear and a motor. An insulator is inserted between the two electrodes. The motor is controlled by using a separate control device.
Abstract:
PURPOSE: A buried structure of a feed line is provided to divide concrete and the feed line, thereby easily controlling a location of the feed line. CONSTITUTION: A buried structure(1) of a feed line includes a lower member, a feed line, and an upper cover. The lower member is formed with a plurality of single layers. The feed line is arranged in a single layer unit. The feed line is composed of one or more lines which supply power.
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).