Abstract:
본 발명의 일실시 예에 따른 초고속열차용 LSM 섹션전환 시험 장치는 영구자석이 하부에 부착되는 차량, 복수 개의 인버터를 형성하여 전력을 공급하는 전력변환부, 전력변환부에 전기적으로 연결되어 전력변환부로부터 전력을 공급받아 자기장을 발생하고, 자기장과 영구자석 간의 상호작용을 이용하여 차량이 주행되도록 추진력을 발생하는 선형 동기 모터(LSM; Linear Synchronous Motor)의 스테이터가 적어도 하나 이상의 섹션으로 배분되어 배치되는 궤도 및 궤도에서 주행하는 차량에 대한 주행데이터를 모니터링하는 모니터링부를 포함한다.
Abstract:
The present invention relates to a switch device for preventing invasion of conductive heat capable of preventing conductive heat from being transferred to a superconductive coil through current leads for a superconductive electromagnet. According to the present invention, a switch device (100) prepared in current leads (20) consisting of normal conductive current leads (21) and superconductive current leads (22) to supply current to a superconductive coil (10) prepared inside a chamber (30) from external power, comprises: a contacting piece (110) consisting of a superconductive member (111) and a magnetic member (112) combined with the superconductive member (111), and prepared between normal conductive current leads (21) and superconductive current leads (22) located at a distance away from each other; a motor magnet (120) prepared to face the contacting piece (110) for operating the contacting piece (110) to disconnect the normal conductive current leads (21) from the superconductive current leads (22) by exiting current; and a restoring means for providing restoring force in order to allow the contacting piece (110) to return to the original position. Therefore, the present invention has an effect of preventing conductive heat through current leads.
Abstract:
PURPOSE: A variable power drive control system is provided to enable a railway vehicle to travel directly without exchange of a railway vehicle by corresponding elastically according to a railway system and a power supply manner of each nation. CONSTITUTION: A serial-to-parallel voltage converting circuit is connected to a variable power supply line. Four inverters are connected to form a serial circuit and a parallel circuit and invert a polarity of a power signal from the serial-to-parallel voltage converting circuit so as to supply current needed for a railway vehicle travel to electric motors. When a DC power of 3000V is supplied from the variable power supply line, the inverters whose regulated voltage of a DC link terminal is 750V, are connected in series by the serial-to-parallel voltage converting circuit, so that the DC power of 3000V is converted into a DC power of 1500V. When a DC power of 1500V is supplied from the variable power supply line, the inverters whose regulated voltage of a DC link terminal is 750V, are connected in parallel by the serial-to-parallel voltage converting circuit, so that the DC power of 3000V is converted into a DC power of 750V.
Abstract:
PURPOSE: An electrical load unit of a power converter is provided to reduce the test cost by simplifying a load test of an inverter for vehicle. CONSTITUTION: A smoothing reactor is used as a load of a test target. The current due to a difference between an output voltage of a tester and an output voltage of the test target is applied to both ends of the smoothing reactor. A user obtains the current of the test target as the desired current by controlling the output voltage of the test target. A current controller is used for controlling the output voltage of the test target. A load test is smoothly performed by using a feed forward control block. The feed forward control block is used as the current controller. The smoothing reactor is connected to an inverter as the test target.
Abstract:
PURPOSE: A DC variable main circuit is provided to enable a railway vehicle to travel directly without exchange of a railway vehicle by corresponding elastically according to a railway system and a power supply manner of each nation. CONSTITUTION: A variable voltage converting device is connected to a variable power supply line. Two inverters are connected to form a serial circuit and a parallel circuit selectively by plural mechanical switches so as to supply current needed for a railway vehicle travel to electric motors. When a DC power of 3000V is supplied from the variable power supply line, the inverters whose regulated voltage of a DC link terminal is 1500V, are connected in series by the variable voltage converting device, so that the DC power of 3000V is converted into a DC power of 1500V. When a DC power of 1500V is supplied from the variable power supply line, the inverters whose regulated voltage of a DC link terminal is 1500V, are connected in parallel by the variable voltage converting device, so that the DC power of 1500V is converted into a DC power of 3000V.
Abstract:
PURPOSE: An electrical inertia load control device having a gate driver for protecting IGBT(Isolation Gate Bipolar Transistor) element is provided to prevent a breakdown of the IGBT element by interrupting effectively over-current and over-voltage generated from a switching process of an inverter. CONSTITUTION: The first and the second pins(1,2) are used for receiving control signals(VIN+,VIN-). The thirteen pin(13) is used as Vcc2. The thirteenth pin(13) compares a voltage of the thirteenth pin(13) with 12V as a minimum voltage for turning on a power switch. The thirteenth pin(13) controls an output signal in order not to output the control signal to an IGBT element if the minimum voltage is less than 12V. The fourteenth pin(14) is connected with a collector of the IGBT device as a power switch. The sixteenth pin(16) is connected with an emitter of the IGBT device.
Abstract:
PURPOSE: A control device for testing an electrical inertia load of a railroad car is provided to reduce a manufacturing cost and a malfunction of the control device by adding a function of an A/D converter, a function of a flash ROM, and a pulse width modulation function to a high-speed operating function of existing DSP(Digital Signal Processing) portion. CONSTITUTION: A control device is formed with a power supply converter for supplying electric power to an inertia simulator, an AD converter for measuring output torque and the amount of current of the power converter, an encoder portion for measuring a speed of a motor, a power converter for reducing the power for sharing a DC link terminal, and a database unit for consuming the power to prevent a boosting phenomenon of the DC link terminal. TMS320F240 is used as a microprocessor. The TMS320F240 has a function of an A/D converter, a function of a flash ROM, and a pulse width modulation function as well as a high-speed operating function of an existing DSP portion.