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公开(公告)号：KR101214446B1
公开(公告)日：2012-12-21
申请号：KR1020110118328
申请日：2011-11-14
Applicant: 한국전기연구원
IPC: H02M7/483
Abstract: PURPOSE: A mirror type multilevel converter is provided to stably supply power for a power converting system with high voltage and capacity. CONSTITUTION: A top circuit unit(100) includes a top capacitor(110), a first switching device(121), and a second switching device(122). The first switching device and the second switching device are connected in parallel to the top capacitor. The first switching device and the second switching device form one set(120) and are serially connected in the same direction. A bottom circuit unit(200) includes a bottom capacitor(210), a third switching device(221), and a fourth switching device(222). The third switching device and the fourth switching device form one set(220) and are serially connected in the same direction.
Abstract translation: 目的：提供一种镜式多电平转换器，用于为具有高电压和容量的电力转换系统稳定供电。 构成：顶部电路单元（100）包括顶部电容器（110），第一开关装置（121）和第二开关装置（122）。 第一开关器件和第二开关器件并联连接到顶部电容器。 第一开关装置和第二开关装置形成一组（120）并沿同一方向串联连接。 底部电路单元（200）包括底部电容器（210），第三开关装置（221）和第四开关装置（222）。 第三开关装置和第四开关装置形成一组（220）并沿同一方向串联连接。
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公开(公告)号：KR1020110068283A
公开(公告)日：2011-06-22
申请号：KR1020090125163
申请日：2009-12-16
Applicant: 한국전기연구원
IPC: H02P9/44
CPC classification number: H02P9/44 , H02K19/16 , H02P21/0003 , H02P2103/20
Abstract: PURPOSE: A synchronizing method for a generation system including a winding type induction generator is provided to prevent an individual synchronization angle reset process by automatically synchronizing a stator voltage vector with a system voltage vector regardless of the size of a system voltage. CONSTITUTION: A Harr wavelet function with 2 level and a voltage signal with a noise are successively convoluted. The voltage signal is divided into three frequency components. A signal is rectified by applying a threshold and is restored. A new voltage signal without the noise is varied at a small slope range.
Abstract translation: 目的：提供一种用于包括绕组型感应发电机的发电系统的同步方法，以通过使定子电压矢量与系统电压矢量自动同步而不考虑系统电压的大小来防止单独的同步角度复位过程。 构成：具有2级的Harr小波函数和具有噪声的电压信号被连续地卷积。 电压信号被分为三个频率分量。 通过应用阈值来纠正信号并被恢复。 没有噪声的新电压信号在较小的斜率范围内变化。
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公开(公告)号：KR1020110060262A
公开(公告)日：2011-06-08
申请号：KR1020090116796
申请日：2009-11-30
Applicant: 한국전기연구원
Abstract: PURPOSE: A power converting apparatus of a synchronous generator is provided to ensure a harmonic current property by constituting a 2-level converter and a 3-level NPC converter concurrently. CONSTITUTION: A generator side converter(10) is made of a 2-level converter. One converter(20a) among system side converters is made of a multi-level NPC converter. Th multi-level NPC converter is a 3-level NPC converter whose output is controlled according to a voltage command value of a controller. A rest system side converter(20) is composed of a 2-level converter. A controller controls compensation of the harmonic current induced from each system side converter into the system side.
Abstract translation: 目的：提供同步发电机的电力转换装置，通过同时构成2级转换器和3级NPC转换器来确保谐波电流特性。 构成：发电机侧转换器（10）由2电平转换器构成。 系统侧转换器中的一个转换器（20a）由多级NPC转换器构成。 多级NPC转换器是一个3级NPC转换器，其输出根据控制器的电压指令值进行控制。 休息系统侧转换器（20）由2级转换器构成。 控制器控制从每个系统侧转换器引入系统侧的谐波电流的补偿。
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公开(公告)号：KR101018713B1
公开(公告)日：2011-03-04
申请号：KR1020080120024
申请日：2008-11-28
Applicant: 한국전기연구원
Abstract: 본 발명은 엔코더 신호의 처리방법에 관한 것으로서, 엔코더 센서부의 출력신호인 A상 신호 및 B상 신호와 함께 이들 신호로부터 위상 시프트된 신호 형태로 생성된 신호들을 추가로 활용하여 8체배 신호를 획득, 활용함으로써, 종래에 비해 엔코더 출력신호의 분해능을 향상시킬 수 있고, 제어대상의 속도 및 위치를 보다 정밀하게 제어할 수 있게 되는 엔코더 신호의 처리방법에 관한 것이다. 상기한 본 발명은, a) 엔코더 센서부의 출력신호로서 90°위상차를 갖는 A상 및 B상의 사인파 신호를 입력받는 단계와; b) 상기 A상 및 B상의 사인파 신호로부터 위상 시프트된 아날로그 신호를 획득하는 단계와; c) 상기 A상 및 B상의 사인파 신호와 위상 시프트된 아날로그 신호를 비교기를 이용해 각각 디지털 신호로 변환하고 변환된 디지털 신호를 8체배하여 8체배 펄스 신호를 얻는 단계와; d) 상기 8체배 펄스 신호로부터 M/T 카운터를 이용해 속도정보를 획득하고, 상기 속도정보로부터 위치정보를 획득하는 단계;를 포함하는 것을 특징으로 한다.
엔코더, A상, B상, 8체배, 분해능 향상-
公开(公告)号：KR100928549B1
公开(公告)日：2009-11-24
申请号：KR1020070123110
申请日：2007-11-30
Applicant: 한국전기연구원
IPC: H02M7/48
Abstract: 본 발명은 스위치 클램프트 멀티-레벨 인버터에 대한 것으로서, 더욱 상세하게는 클램핑 다이오드를 사용하지 않고 스위치로 중성점들을 클램프 함으로써, 출력전압의 레벨을 증가시켜 출력전압의 고조파 및 부하전류의 리플을 감소시킬 수 있고, 멀티-레벨로 확장시 용이하게 모듈화할 수 있는 스위치 클램프트 멀티-레벨 인버터에 관한 것이다.
이를 위해,
스위치 클램프트 3-레벨 인버터에 있어서,
직렬연결되는 제1 스위치 및 제3 스위치;
상기 제1 스위치와 제3 스위치의 중성점에 직렬로 연결되는 제2 스위치 및 제4 스위치;
를 포함하여 구성되며, 상기 제1 스위치, 제2 스위치, 제3 스위치는 동종의 스위치이고, 상기 제4 스위치의 정격전압은 상기 동종의 스위치 정격전압의 두 배인 것을 특징으로 하는 스위치 클램프트 3-레벨 인버터를 제공한다.
산업용 전동기, 인버터, 멀티레벨, 다이오드 클램프트, 중성점 전압 불균형, 모듈화, 고조파, 전류리플.Abstract translation: 提供了一种开关钳位多电平逆变器，通过增加输出电压的电平来减少谐波纹波和负载电流。 开关钳位三电平逆变器包括第一至第四开关（21-24）和直流链电容器（25）。 第一至第三开关串联连接。 第二和第四开关串联连接到第一开关和第三开关的中性点。 第一到第三台交换机是同一种交换机。 第四开关的额定电压是第一至第三开关的额定电压的两倍。
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Patent Agency Ranking
公开(公告)号：KR100886194B1
公开(公告)日：2009-02-27
申请号：KR1020070056186
申请日：2007-06-08
Applicant: 한국전기연구원
IPC: H02P9/34
CPC classification number: H02P9/007 , H02M5/4585 , H02M7/49 , H02M2007/4835 , H02P2207/073
Abstract: 멀티레벨 변환기 토폴로지(topology)를 갖는 새로운 권선형유도발전기 제어방식을 제시하여, 고압 사양을 갖는 권선형유도발전기를 제어할 수 있도록 하며, 분산형 전원 발전설비에서 요구되는 fault ride-through 기능과 고립 운전 회피 기능을 수행할 수 있는 계통 연계형 권선형 유도 발전기 제어장치가 개시되어 있다. H-브리지 멀티레벨 변환기는 각 상마다 2-leg IGBT로 구성된 단위모듈을 직렬로 연결하여 3상 전압 파형을 발생하고, 슬립 전력을 제어한다. 3상 IGBT 승압 변환기는 상기 H-브리지 멀티레벨 변환기에서 요구하는 다수의 독립된 직류 전압원을 생성한다.
신재생에너지, 권선형 유도발전기, 멀티레벨 컨버터, 슬립 전력제어-
公开(公告)号：KR1020030049759A
公开(公告)日：2003-06-25
申请号：KR1020010080064
申请日：2001-12-17
Applicant: 한국전기연구원
IPC: A61B6/03
Abstract: PURPOSE: A speed control apparatus is provided to reduce a speed ripple by adding the compensation current which is applied in accordance with the size and phase of the eccentric load to the driving current component. CONSTITUTION: A speed control apparatus comprises AC/DC converters(301,302) for converting the AC current for two phases from among the three-phase current being applied to the motor; a three phase-two phase coordinate transformation unit(303) for transforming the converted DC current into two-phase current of d and q axes; a speed detection unit(304) for detecting speed of the motor; a proportional integral controller(305) for performing a proportional integral control for the variation between the reference speed and the detected speed; a limiter(306) for restricting the amplitude with respect to the input waveform; a control current compensation unit(309) for compensating the control current being input to the motor; a voltage command compensation unit(310) for compensating the voltage command being input to the motor; a two phase-three phase coordinate inverse transformation unit(311) for transforming two-phase voltages of d and q axes into three-phase voltages; a pulse width modulation unit(312) for modulating and outputting pulse widths of three-phase voltages; an inverter(313) for controlling operation of the motor by performing on/off control operations with respect to the three-phase voltage input to the motor; and an eccentric load torque estimator(307) interposed between the limiter and the control current compensation unit, and which receives the current from among the two-phase currents transformed by the three phase-two phase coordinate transformation unit and the speed of the motor detected by the speed detection unit, estimates a torque in accordance with the eccentric load, and outputs the estimated value.
Abstract translation: 目的：提供一种速度控制装置，通过将根据偏心负载的尺寸和相位施加的补偿电流加到驱动电流分量来减小速度纹波。 构成：速度控制装置包括AC / DC转换器（301,302），用于从施加到电动机的三相电流中转换两相的交流电流; 用于将转换的DC电流变换为d轴和q轴的二相电流的三相二相位坐标变换单元（303）; 速度检测单元，用于检测马达的速度; 比例积分控制器（305），用于对所述参考速度和所述检测速度之间的变化执行比例积分控制; 限制器（306），用于限制相对于输入波形的振幅; 控制电流补偿单元（309），用于补偿输入到电动机的控制电流; 电压指令补偿单元（310），用于补偿输入到电动机的电压指令; 用于将d轴和q轴的两相电压变换为三相电压的二相三相坐标逆变换单元（311）; 用于调制和输出三相电压的脉冲宽度的脉宽调制单元（312）; 逆变器（313），用于通过对输入到电动机的三相电压进行接通/断开控制操作来控制电动机的动作; 以及夹在所述限制器和所述控制电流补偿单元之间的偏心负载转矩估计器（307），并且接收由所述三相二相位坐标变换单元变换的两相电流中的电流和检测到的所述电动机的速度 通过速度检测单元估计根据偏心负载的转矩，并输出估计值。
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公开(公告)号：KR1020030003791A
公开(公告)日：2003-01-14
申请号：KR1020010039349
申请日：2001-07-02
Applicant: 한국전기연구원
IPC: B60L3/10
CPC classification number: Y02T10/646
Abstract: PURPOSE: A method for controlling a traction in an independent drive type electric vehicle is provided to distribute reference torque to each motor and restrain an over-slipping phenomenon by using an independent driving method. CONSTITUTION: A driving control algorithm is formed with a driven electric vehicle or an electric vehicle model part(201) and a driving control portion(202) connected with the driven electric vehicle or the electric vehicle model part(201). A reference slip difference between a left and a right driving wheel is obtained by using a reference steering angle, a reference reentering angle, and a vehicle speed. Each practical slip ratio of the left and the right driving wheels are obtained. A practical slip difference between the left and the right driving wheels is obtained by the each slip ratio. A differential torque value is obtained by the reference slip difference and the practical slip difference. Each reference torque distribution value of the left and the right driving wheels is obtained by using the differential torque value and the reference torque value. The reference torque distribution values of the left and the right driving wheels are weakened by using a torque weakening fuzzy rule. The weakened reference torque distribution values are applied to motors for driving the left and the right driving wheels.
Abstract translation: 目的：提供一种用于控制独立驱动型电动车辆的牵引力的方法，用于将参考扭矩分配给每个电动机，并通过使用独立的驱动方法来限制过滑现象。 构成：驱动控制算法由驱动电动车辆或电动车辆模型部分（201）和与被驱动电动车辆或电动汽车模型部分（201）连接的驱动控制部分（202）形成。 通过使用参考转向角，参考重入角度和车速来获得左右驱动轮之间的基准滑差。 获得左右驱动轮的实际滑移率。 通过每个滑移率获得左右驱动轮之间的实际滑差。 通过基准滑移差和实际滑差来获得差分转矩值。 通过使用差动转矩值和基准转矩值来获得左右驱动轮的各参考转矩分配值。 通过使用扭矩弱化模糊规则，左右驱动轮的基准转矩分布值变弱。 减弱的基准转矩分配值被施加到用于驱动左右驱动轮的电动机。
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公开(公告)号：KR1020020072078A
公开(公告)日：2002-09-14
申请号：KR1020010012051
申请日：2001-03-08
Applicant: 한국전기연구원
IPC: A61B6/03
Abstract: PURPOSE: A direct drive type gantry is provided to prevent noise caused due to the decelerator or chain, while shortening time for extracting image and obtaining high definition image. CONSTITUTION: A direct drive type gantry(100) comprises a frame(101) for supporting devices for obtaining image information; a stator(102) constituting a synchronous motor, and which is installed to the frame and has a plurality of coils arranged at the inner periphery of the stator so as to form a magnetic field; a rotor(103) constituting the synchronous motor together with the stator, and which is mounted in the stator, and has a plurality of permanent magnets arranged along the outer periphery of the rotor, and devices for obtaining image information arranged along the inner periphery of the rotor; and a control unit(104) electrically connected to the synchronous motor, and which controls speed of the rotor and transmits position of an X-ray tube.
Abstract translation: 目的：提供直接驱动式龙门架，以防止由于减速器或链条引起的噪音，同时缩短提取图像的时间和获得高清晰度图像。 构成：直接驱动式台架（100）包括用于支撑用于获取图像信息的装置的框架（101） 构成同步电动机的定子（102），其安装在所述框架上，并具有配置在所述定子的内周的多个线圈，以形成磁场; 与定子一起构成同步电动机的转子（103），其安装在定子中，并且具有沿着转子的外周配置的多个永磁体，以及用于获得沿着转子的内周排列的图像信息的装置 转子; 以及与该同步电动机电连接并控制转子的速度并透过X射线管的位置的控制单元（104）。
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