Abstract in simplified Chinese:本发明系揭露一种列车速度量测设备及其方法。该列车速度量测设备包含:至少一第一转速计设置在一拖曳车的一轴上且根据该拖曳车之一车轮转速输出一脉波信号;至少一第二转速计设置在一电动车的一轴上且根据该电动车之一车轮转速输出一脉波信号;至少一速度量测单元用以量测根据从该至少一第一转速计和该至少一第二转速计所输出的该些脉波信号的速度值;一速度计算单元用以根据所量测的该些速度值来计算该列车的速度。
Abstract:
본발명은태양광인버터에관한것으로, 보다상세하게는 DC 링크커패시터에저장된직류전압의역전압을태양전지어레이에인가하여태양광발전효율저하를방지하는태양광인버터에관한것이다. 본발명의일 실시예에따른태양광인버터는태양전지어레이로부터출력되는직류전압을저장하는 DC 링크커패시터, 상기 DC 링크커패시터에저장된직류전압을이용하여교류전력을생성하고, 상기생성된교류전력을전력계통에전송하는전력변환부및 상기태양전지어레이의구동값이미리설정된구동조건을만족하는지여부에따라상기 DC 링크커패시터에저장된직류전압을상기전력변환부에인가하거나상기 DC 링크커패시터에저장된직류전압의역전압을상기태양전지어레이에인가하는제어부를포함하는것을특징으로한다.
Abstract:
PURPOSE: An arc-extinguishing unit of a gas insulated circuit breaker is provided to prevent dielectric breakdown by partially discharging heated gas when a certain pressure is formed in a cooling room. CONSTITUTION: A fixed electrode part(100) includes a fixed electrode rod(120). A moving electrode part(200) faces the fixed electrode part. The moving electrode part includes a moving electrode rod(220). A pressure outlet includes a pressure discharging hole and a switching valve opening and closing the pressure discharging hole. The pressure discharging hole is included at least one of a fixed side supporting body(110) or a moving side supporting body(210).
Abstract:
PURPOSE: An apparatus for setting operation authority of a digital device in a power distribution system is provided to prevent accidents due to the operating a digital device. CONSTITUTION: An external signal input unit(100) comprises an input port(101) and a photo-coupler(103). The input port receives a signal switching a local/remote state of a digital device from the outside. A controller(110) sets the digital device to a local state from a remote state. A key input unit(120) and a display unit(130) performs a user interface function. The key input unit receives user instructions from a user. The display unit displays information on the device on a screen.
Abstract:
PURPOSE: A current detecting apparatus is provided to determine a trouble by detecting an abnormal current by using a Rogowskii coil sensor and a CT(current Transformer) sensor at the same time. CONSTITUTION: A CT sensor(101) detects a current flowing in a line. A Rogowskii sensor is closely located to the CT sensor and detects the current flowing through the CT sensor. A CT sensor output processing unit(120) rectifies and compares an output signal of the CT sensor. The CT sensor output processing unit outputs the comparison result to a logic gate unit. A Rogowskii sensor output processing unit(130) rectifies and compares an output signal of the Rogowskii sensor. The Rogowskii sensor output processing unit outputs the comparison result to the logic gate unit. A controller(140) turns on and off a disconnect switch according to an output signal of the logic gate unit.
Abstract:
PURPOSE: An apparatus for controlling a motor and a system for protecting the motor including the same are provided to generate an internal voltage having a constant voltage level by using a second source current which is made by transforming a first source current. CONSTITUTION: A motor protection system(100) comprises a first breaker(110), a current transformer(120), a second breaker(130), a transformer(140), and a motor controlling unit(150). The first breaker supplies a three phase current to a motor(160) or blocks the three phase current. The current transformer generates a second source current by transforming the first source current. The second breaker supplies the three phase current in response to a blocking control signal to the motor or blocks the three phase current. The transformer generates a power source voltage by using the first source current. The motor controlling unit generates internal power by using a negative current obtained by rectifying conversion currents. A motor protector comprises a current distribution and voltage generation unit(151), a current detecting unit(152), a controlling unit(153), a display unit(154), and an input unit(155).