-
公开(公告)号：KR2019990028696U
公开(公告)日：1999-07-15
申请号：KR2019970041332
申请日：1997-12-27
Applicant: 철강융합신기술연구조합 , 재단법인 포항산업과학연구원
IPC: H02M1/08
Abstract: 본 고안은 펄스폭 변조(PWM) 파형을 발생시키는 장치에 관한 것으로서, 소프트웨어 방식에 의해서 디지털 회로로 동작되므로 좌우 비대칭 PWM 파형의 발생 및 추가되는 하드웨어의 부담을 줄여 시스템이 구성되며, EPLD(Electrically Programmable Logic Device)의 내부 디지털 회로의 구성에 의해서 PWM 파형의 발생이 조정되고, 회로의 구성은 래치(latch), 카운터(counter), 비교기(comparator)로 이루어져 각 구성부의 역할을 살펴보면 외부 메인프로세서(main processor)에서 가해진 명령이 라이트(write) 신호에 의해 래치에 보관되고 자동 증감되는 업다운카운터(up-down counter)의 출력값과 비교기에 의해서 비교되어져서 "0" 혹은 "1"의 최종 PWM 파형이 발생하게 된다. 이 발생된 PWM 파형은 전력소자의 구동에 필요한 데드타임(dead-time) 시간을 확보한 후 최종적으로 원하는 파형을 얻게 된다.
-
公开(公告)号：KR100387588B1
公开(公告)日：2003-06-18
申请号：KR1020000082180
申请日：2000-12-26
Applicant: 재단법인 포항산업과학연구원 , 철강융합신기술연구조합
IPC: H02J9/00
Abstract: PURPOSE: A phase difference removing bypass method is provided to prevent fluctuation of output voltage caused due to the phase difference between input line voltage and output line voltage during bypass operation. CONSTITUTION: A phase difference removing bypass method comprises a first step of judging whether a bypass switch is turned on by checking a bypass switch; a second step of operating an uninterruptable power supply(UPS) as an inverter by opening an input breaker, and reducing output frequency of inverter; a third step of judging whether the voltages of input and output lines have the same phase; and a fourth step of disabling operation of the UPS by opening an output breaker and closing a bypass MC, if the voltages of input and output lines are the same.
Abstract translation: 目的：提供一种相位差消除旁路方法，以防止在旁路操作期间由于输入线电压与输出线电压之间的相位差引起的输出电压的波动。 构成：一种相位差消除旁路方法包括：第一步，通过检查旁路开关判断旁路开关是否接通; 通过打开输入断路器来操作作为逆变器的不间断电源（UPS）的第二步骤，并且降低逆变器的输出频率; 判断输入线和输出线的电压是否具有相同的相位的第三步骤; 以及如果输入线和输出线的电压相同，则通过打开输出断路器并闭合旁路MC来禁用UPS的操作的第四步骤。
-
公开(公告)号：KR1020020054035A
公开(公告)日：2002-07-06
申请号：KR1020000082630
申请日：2000-12-27
Applicant: 재단법인 포항산업과학연구원 , 철강융합신기술연구조합
IPC: H02J9/00
Abstract: PURPOSE: A phase difference removal bypass apparatus in an UPS of an APF configuration is provided to remove a phase difference and perform a bypass operation when by-passing the UPS. CONSTITUTION: An input line has an input line voltage(AC). A link inductor(5) is coupled with the input line. An input switch(2) is coupled with the link inductor(5). An input switch MC(3) or an SCR switch(6) is coupled with the input switch(2). An output switch(4) is coupled with the input switch MC(3) or SCR switch(6). An output line is connected to the input line voltage(AC) through a bypass MC(1). The output line has an output line voltage(LO). An IGBT stack(7) is coupled between the input switch MC(3) or SCR switch(6) and the output switch(4). A battery switch(8) is coupled with the IGBT stack(7). A battery(9) is coupled with the battery switch(8).
Abstract translation: 目的：提供APF配置的UPS中的相位差去除旁路装置，以消除相位差，并在旁路UPS时进行旁路操作。 构成：输入线具有输入线电压（AC）。 链路电感（5）与输入线耦合。 输入开关（2）与链路电感（5）耦合。 输入开关MC（3）或SCR开关（6）与输入开关（2）耦合。 输出开关（4）与输入开关MC（3）或SCR开关（6）耦合。 输出线通过旁路MC（1）连接到输入线电压（AC）。 输出线具有输出线电压（LO）。 IGBT堆叠（7）耦合在输入开关MC（3）或SCR开关（6）和输出开关（4）之间。 电池开关（8）与IGBT堆叠（7）耦合。 电池（9）与电池开关（8）耦合。
-
公开(公告)号：KR1020010057964A
公开(公告)日：2001-07-05
申请号：KR1019990061389
申请日：1999-12-23
Applicant: 재단법인 포항산업과학연구원 , 철강융합신기술연구조합
IPC: G01R31/00
Abstract: PURPOSE: A transformer characteristic analysis apparatus using inverter is provided to forecast abnormal condition of transformer easily by analyzing frequency characteristic of several parameter clearly at input, output part of transformer. CONSTITUTION: A transformer characteristic analysis apparatus is composed of an inverter(21), a control part(22), and a signal analyser(23). The inverter(21) is connected to a transformer(24) in a series at upper stream of first side of the transformer(24) which power is input to and supplies power to first side of the transformer(24). The signal analyser(23) has electric signal input part of two channel, and a first channel receives and measures input of voltage(V1) and current(I1) which is output from the inverter(21), and a second channel receives and measures input of voltage(V2) and current(I2) which is output from secondary side of the transformer(24), and then the measured signal is transferred to an analysis part. The analysis part analyses frequency of voltage signal and current signal of each channel and outputs characteristic of the transformer by formula or graph.
Abstract translation: 目的：提供变压器变压器特性分析装置，通过在变压器输入，输出部分清楚分析几个参数的频率特性，轻松预测变压器异常情况。 构成：变压器特性分析装置由逆变器（21），控制部（22）和信号分析器（23）构成。 逆变器（21）在变压器（24）的第一侧的上游串联连接到变压器（24），该变压器的功率被输入并向变压器（24）的第一侧供电。 信号分析器（23）具有双通道的电信号输入部，第一通道接收并测量从逆变器（21）输出的电压（V1）和电流（I1）的输入，第二通道接收并测量 输入从变压器（24）的次级侧输出的电压（V2）和电流（I2），然后测量的信号被传送到分析部件。 分析部分分析每个通道的电压信号和电流信号的频率，并通过公式或图表输出变压器的特性。
-
公开(公告)号：KR102041290B1
公开(公告)日：2019-11-06
申请号：KR1020120147668
申请日：2012-12-17
Applicant: 재단법인 포항산업과학연구원
-
Patent Agency Ranking
公开(公告)号：KR101940921B1
公开(公告)日：2019-01-22
申请号：KR1020170105067
申请日：2017-08-18
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: H01L31/0232 , H01L31/054 , G02B5/04 , H02S20/26
-
公开(公告)号：KR101856953B1
公开(公告)日：2018-06-29
申请号：KR1020120112199
申请日：2012-10-10
Applicant: 재단법인 포항산업과학연구원
Abstract: 본발명은초전도에너지저장장치의열 발생을최소화하고전력을안정화시키는방법에관한것이다. 전력안정화방법은, 초전도에너지저장장치의주파수가설정된기준주파수범위이내인지여부를판단하고, 판단결과, 주파수가기준주파수범위이내인경우로서전류가기준전류인경우이전상태를유지하고, 전류가기준전류와다른경우충전또는방전을진행한다. 그러나판단결과주파수가기준주파수범위를벗어나는경우충전또는방전을진행한다. 이로부터완전충전또는완전방전상태를최대한회피함으로써충전및 방전에필요한여유공간을갖게됨에따라전력안정화에기여할수 있다.
-
公开(公告)号：KR101817070B1
公开(公告)日：2018-02-21
申请号：KR1020120002802
申请日：2012-01-10
Applicant: 재단법인 포항산업과학연구원
CPC classification number: Y02P10/216
Abstract: 본발명은측정대상물특히, 전기로와같이열적불균형, 내부내화물의손상등의이유로외형에있어서변형이발생할수 있는측정대상물인변형을감지하기위한시스템및 방법이다. 변형감지방법은측정대상물원주면을따라등간격으로설치되어원주방향, 반경방향및 높이방향중 적어도하나이상에대한변위량을측정하는 3개이상의센서부로부터각각변위량신호를수신하고, 인접한 2개의센서부로부터수신된변위량으로부터측정대상물의변형발생량과변형발생위치를계산할수 있다. 이로부터측정대상물에비정상적인변형이발생한경우변형발생위치와변형발생량을신속하고도정확하게감지하여대처할수 있다.
Abstract translation: 本发明是用于检测被测定可导致的原因，其中包括热不平衡的外观的变化的对象的应变的系统和方法，到物体的内部耐火损坏要被测量，例如特别是，电炉中。 应变检测方法被安装在沿主表面测量对象原始圆周方向等间隔，各从三个或更多个传感器单元，其测量为在径向和垂直方向中的至少一个的位移量，并且两个相邻的传感器接收的位移信号 测量对象的变形量和变形发生位置可以根据从单元接收到的位移量来计算。 由此，当在测量对象中发生异常变形时，能够快速且准确地检测和处理变形发生的位置和变形发生的量。
-
公开(公告)号：KR101674392B1
公开(公告)日：2016-11-10
申请号：KR1020140173499
申请日：2014-12-05
Applicant: 재단법인 포항산업과학연구원
CPC classification number: Y02E10/766
Abstract: 계통전원을버퍼로이용한직류배전시스템의전원공급장치가제공된다. 직류배전시스템의전원공급장치는, 직류배전시스템에직류전압을공급하는직류링크단과, 풍력발전기의최대전력추종제어를통해직류링크단에직류전압을공급하는제1 컨버터와, 직류링크단의직류전압의크기와미리설정된전압지령치에기초하여, 직류링크단의전압을계통전원으로공급하거나또는계통전원을직류링크단에공급하는제2 컨버터를포함함으로써, 계통전원을버퍼로사용하여직류배전시스템에안정적으로직류전압을공급할수 있으며, 시스템구성비용을절감할수 있다.
-
公开(公告)号：KR1020140087099A
公开(公告)日：2014-07-09
申请号：KR1020120153807
申请日：2012-12-26
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
CPC classification number: Y02P10/216 , C21C5/52 , C21C2005/5288 , F27B3/085 , F27B3/28 , F27D11/10
Abstract: The present invention relates to a method for controlling a position of an electrode rod and an electric furnace employing the same. An electric furnace according to an embodiment of the present invention includes an electrode rod which generates arc to heat a molten steel in a furnace body; a lance which supplies supplementary material to the furnace body to generate slag foam in the furnace body; a structure borne noise sensor which measures structure borne noise generated in the furnace body to output a structure borne noise signal; and a control unit which calculates the height of the slag foam using the structure borne noise signal, and adjusts the height of the electrode rod according to the height of the slag foam.
Abstract translation: 本发明涉及一种用于控制电极棒和使用其的电炉的位置的方法。 根据本发明实施例的电炉包括产生电弧以对炉体中的钢水进行加热的电极棒; 向炉体供给补充材料以在炉体中产生炉渣泡沫的喷枪; 一种结构噪声传感器，用于测量炉体中产生的结构噪声，以输出结构噪声信号; 以及控制单元，其使用结构噪声信号来计算炉渣泡沫的高度，并且根据炉渣泡沫的高度调节电极棒的高度。
-
-
-
-
-
-
-
-
-
Search Results
205
records
(took 0.021 seconds)
