-
公开(公告)号：KR101338147B1
公开(公告)日：2013-12-09
申请号：KR1020120135710
申请日：2012-11-28
Applicant: 한국전기연구원
IPC: H02M3/28
Abstract: The present invention relates to a bidirectional DC-DC converter and, more particularly, to the bidirectional DC-DC converter which provides optimum efficiency and output control regardless of the kind of loads applied to the bidirectional DC-DC converter used for a battery charging device or a system connection use. According to present invention, the bidirectional DC-DC converter operates as the shape of an LLC resonance converter or a dual active band (DAB) converter according to the characteristic of a connected load and the direction of power flow, thereby providing the optimum efficiency and output control regardless of the kind of loads connected to a primary side or a secondary side.
Abstract translation: 本发明涉及一种双向DC-DC转换器，更具体地说，涉及提供最佳效率和输出控制的双向DC-DC转换器，而不管施加到用于电池充电装置的双向DC-DC转换器的负载种类如何 或系统连接使用。 根据本发明，双向DC-DC转换器根据连接负载的特性和功率流的方向，作为LLC谐振变换器或双有源频带（DAB）转换器的形状运行，从而提供最佳效率， 输出控制，而不管连接到初级侧或次级侧的负载的种类。
-
公开(公告)号：KR1020120122683A
公开(公告)日：2012-11-07
申请号：KR1020110040986
申请日：2011-04-29
Applicant: 한국전기연구원
CPC classification number: H05B33/0815 , H03K17/30 , H05B33/0803 , Y02B20/42
Abstract: PURPOSE: A phase control dimmer is provided to control a phase by driving two switching transistors according to a voltage charged to a driving capacitor. CONSTITUTION: Switching transistors(M1,M2) are driven in respectively different phases of an input voltage. Driving capacitors(C1,C2) supply a threshold voltage of the switching transistor. A diode controls the flow of a current charged to a driving capacitor. A variable resistance(R1) controls a phase of an output voltage of a switching transistor. The driving transistor is connected between a gate electrode and a source electrode.
Abstract translation: 目的：提供相位控制调光器，通过根据充电到驱动电容器的电压驱动两个开关晶体管来控制相位。 构成：开关晶体管（M1，M2）分别驱动输入电压的不同相位。 驱动电容器（C1，C2）提供开关晶体管的阈值电压。 二极管控制充电到驱动电容器的电流的流动。 可变电阻（R1）控制开关晶体管的输出电压的相位。 驱动晶体管连接在栅电极和源电极之间。
-
公开(公告)号：KR101073591B1
公开(公告)日：2011-10-14
申请号：KR1020100084154
申请日：2010-08-30
Applicant: 한국전기연구원
Abstract: 본 발명은 직류 차단기에 관한 것이다. 보다 상세하게는 전류 차단 과정에서 발생하는 아크의 크기와 지속 시간을 줄여 차단 성능을 개선하며 접점의 손상을 최소화할 수 있는 직류 차단기에 관한 것이다. 본 발명은 제1 접점, 상기 제1 접점과 이격되어 있는 제2 접점, 및 상기 제1 접점과 상기 제2 접점을 연결하며 전류 차단 시 상기 제1 접점과 상기 제2 접점의 연결을 개방하는 이동 접점을 포함하는 직류 차단기에 있어서, 상기 제1 접점과 상기 제2 접점 사이에 미리 결정된 간격으로 구비되고, 각각이 상기 이동 접점과 접촉하며, 상기 전류 차단 시 상기 이동 접점과 접촉이 해제되는 복수의 보조 접점; 및 상기 제1 접점과 상기 보조 접점 사이, 및 상기 복수의 보조 접점 각각의 사이에 연결된 복수의 저항을 포함하며, 상기 전류발생 시 상기 복수의 저항을 통해 전류가 일정시간 흐른 후 상기 이동 접점이 상기 제1 접점과 상기 제2 접점의 연결을 개방하는 것을 특징으로 한다. 본 발명에 의하면 전류 차단 동작 시 발생하는 차단 전류와 전압의 크기를 줄여 개방된 접점 사이에서 발생하는 아크의 크기와 발생 시간을 감소시키므로 직류 차단기의 차단 성능을 크게 향상시킬 수 있는 효과를 갖는다.
-
公开(公告)号：KR1020110037133A
公开(公告)日：2011-04-13
申请号：KR1020090094430
申请日：2009-10-06
Applicant: 한국전기연구원
IPC: H05B37/02
CPC classification number: H05B33/0818 , H05B33/0824
Abstract: PURPOSE: An LED driving circuit using a simple current source is provided to implement economical and reliable light source structure by simplifying an LED driving circuit. CONSTITUTION: An LED driver circuit comprises an AC power source(Vin), an inductor(L), a bridge rectifier diode, a switch(S) and an LED. A bridge rectifier diode is comprised of four diodes, wherein a first structure of two diodes are directly connected and a second structure of two diodes are serially connected while two structure are connected in parallel with each other.
Abstract translation: 目的：提供使用简单电流源的LED驱动电路，通过简化LED驱动电路实现经济可靠的光源结构。 构成：LED驱动器电路包括交流电源（Vin），电感器（L），桥式整流二极管，开关（S）和LED。 桥式整流二极管由四个二极管组成，其中两个二极管的第一结构直接连接，并且两个二极管的第二结构串联连接，而两个结构彼此并联连接。
-
公开(公告)号：KR1020100010337A
公开(公告)日：2010-02-01
申请号：KR1020080071263
申请日：2008-07-22
Applicant: 한국전기연구원
IPC: H02M7/48 , H02M7/5387
CPC classification number: Y02B70/1441 , Y02P80/112 , H02M7/4826 , H02M2007/4815
Abstract: PURPOSE: A non-contact resonant converter with a matching transformer is provided to improve a resonant voltage gain by connecting a matching transformer between a full-bridge converter and a resonant circuit. CONSTITUTION: An AC/DC converter converts an inputted AC voltage to a DC voltage. A full-bridge converter is electrically connected to an output terminal of the AC/DC converter. A resonant circuit is connected to an output terminal of the full-bridge converter. A non-contact transformer is electrically connected to the resonant circuit. A matching transformer is electrically connected between the output terminal of the full bridge converter and the resonant circuit for obtaining the optimum resonant gain from a voltage gain curve of the resonant circuit and the non-contact transformer.
Abstract translation: 目的：提供具有匹配变压器的非接触谐振变换器，通过在全桥转换器和谐振电路之间连接匹配变压器来提高谐振电压增益。 构成：AC / DC转换器将输入的AC电压转换为DC电压。 全桥转换器电连接到AC / DC转换器的输出端。 谐振电路连接到全桥转换器的输出端子。 非接触变压器电连接到谐振电路。 匹配的变压器电连接在全桥转换器的输出端和谐振电路之间，用于从谐振电路和非接触变压器的电压增益曲线获得最佳谐振增益。
-
Patent Agency Ranking
公开(公告)号：KR1020090126395A
公开(公告)日：2009-12-09
申请号：KR1020080052449
申请日：2008-06-04
Applicant: 한국전기연구원
IPC: H05B41/285 , H05B41/24
CPC classification number: H05B41/285 , H05B41/16 , H05B41/2853 , H05B41/2856
Abstract: PURPOSE: A protective circuit of an electronic ballast, and a protective circuit of the electronic ballast for a CNT planar light source using the same are provided to improve the reliability and the lifetime of a plane light source and a stabilizer by adding an electronic ballast and the stabilizer for the CNT plane light source. CONSTITUTION: In a device, a voltage supply unit(11) detects the current of an inductor, and it rectifies and filters it and change a voltage through a resistor. A lightly loaded protection unit(12) controls a flow of a voltage outputted in low load. The overload protection unit(13) controls the flow of the voltage outputted in overload. A no-load protection unit(14) detects a voltage outputted in no-load and controls the flow of the voltage. An over-temperature detects the outputted voltage in over-temperature controls the flow of the voltage. A switching unit(16) is turned on /off according each load condition.
Abstract translation: 目的：提供电子镇流器的保护电路以及使用其的CNT平面光源的电子镇流器的保护电路，以通过添加电子镇流器来提高平面光源和稳定器的可靠性和寿命， 用于CNT平面光源的稳定剂。 构成：在一个设备中，电压供应单元（11）检测电感的电流，并对其进行整流和滤波，并通过电阻改变电压。 轻载保护单元（12）控制在低负载下输出的电压的流动。 过载保护单元（13）控制过载输出的电压。 无负载保护单元（14）检测空载中输出的电压并控制电压的流动。 过温检测过温控制输出电压的电压。 开关单元（16）根据负载条件被接通/断开。
-
公开(公告)号：KR1020090120044A
公开(公告)日：2009-11-24
申请号：KR1020080045895
申请日：2008-05-19
Applicant: 한국전기연구원
IPC: H05B41/24 , H05B41/288 , H05B41/38
CPC classification number: H05B41/38 , H05B41/042 , H05B41/24 , H05B41/288
Abstract: PURPOSE: A dimming device of ballast for driving a surface light source is provided to easily perform digital dimming by using a photocoupler and an FET for signals. CONSTITUTION: A dimming device formed in ballast of a surface light source includes a dimming part. The dimming part includes FETs for signals, resistors, and photocouplers. The resistors are serially connected to the FETs for signals. The photocouplers deliver an external signal to a gate of the FET for signals, are electrically connected to a power factor corrector of the ballast, and perform illuminance control of 2N step by controlling an output voltage of the power factor corrector.
Abstract translation: 目的：提供用于驱动表面光源的镇流器的调光装置，以便通过使用光电耦合器和FET来进行信号的数字调光。 构成：在面光源的镇流器中形成的调光装置包括调光部。 调光部分包括用于信号，电阻和光电耦合器的FET。 电阻串联连接到FET用于信号。 光电耦合器向FET的栅极提供外部信号用于信号，电连接到镇流器的功率因数校正器，并且通过控制功率因数校正器的输出电压来执行2N级的照度控制。
-
公开(公告)号：KR1020080104468A
公开(公告)日：2008-12-03
申请号：KR1020070051291
申请日：2007-05-28
Applicant: 한국전기연구원
IPC: H02M7/5387
Abstract: An apparatus for protecting a converter is provided to prevent an operation area of the converter from being shifted from zero-voltage switching domain to zero-current switching domain. In an apparatus for protecting a converter, a sensing unit(20) senses the output voltage(VO) and output current(IO) of the converter(10). A processing unit(30) processes an output current and output voltage and generates a processing voltage(VT) and a processing electric current(IT). A phase comparator(40) compares the phase of the processing voltage with that of the processing current, outputs a reference value(Q). A controller(50) controls the operation of converter according to the reference value.
Abstract translation: 提供一种用于保护转换器的装置，以防止转换器的操作区域从零电压切换域移动到零电流切换域。 在用于保护转换器的装置中，感测单元（20）感测转换器（10）的输出电压（VO）和输出电流（IO）。 处理单元（30）处理输出电流和输出电压，并产生处理电压（VT）和处理电流（IT）。 相位比较器（40）将处理电压的相位与处理电流的相位进行比较，输出基准值（Q）。 控制器（50）根据参考值控制转换器的操作。
-
公开(公告)号：KR100782104B1
公开(公告)日：2007-12-04
申请号：KR1020060082437
申请日：2006-08-29
Applicant: 한국전기연구원
CPC classification number: H05B41/14 , G02F1/1336 , G09G3/3406
Abstract: An inverter circuit for a scanning backlight is provided to reduce the number of switches to a half in comparison with a conventional full bridge circuit by basically using a half bridge circuit driven by two switches and constituting a full bridge circuit with the other half bridge circuit. In an inverter circuit for a scanning backlight, a half bridge circuit(10) has two switching devices(11,13) connected in series. A first side of a transformer(Np) and a capacitor(Cb) are serially connected to intermediate points(A,B,C,D,E) between the two switching devices. The half bridge circuits are connected to DC power(Vi) in parallel as many as the division number of a light source. Each half bridge circuit is used two times during the whole cycle. The half bridge circuit is used once as a lead leg and once as a lag leg.
Abstract translation: 提供了一种用于扫描背光的逆变器电路，通过基本上使用由两个开关驱动的半桥电路并与另一个半桥电路构成全桥电路，将开关数减少到常规全桥电路的一半。 在用于扫描背光源的逆变器电路中，半桥电路（10）具有串联连接的两个开关器件（11,13）。 变压器（Np）和电容器（Cb）的第一侧与两个开关器件之间的中间点（A，B，C，D，E）串联连接。 半桥电路与光源的分割数量并行地连接到直流电力（Vi）。 每个半桥电路在整个周期内使用两次。 半桥电路一次作为引导线使用，一次作为滞后支路使用。
-
-
-
-
-
-
-
-
-
Search Results
120
records
(took 0.029 seconds)
