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公开(公告)号：KR101297080B1
公开(公告)日：2013-08-19
申请号：KR1020120033283
申请日：2012-03-30
Applicant: 한국전기연구원
IPC: H02M7/17
Abstract: PURPOSE: A series compensation half bridge multi-module converter is provided to prevent short-circuit current in accidents by controlling current flowing in a smoothing series inductor through a secondary side circuit. CONSTITUTION: A half bridge multi-module converter (100) includes a series compensation inductor (110) with a transformer structure, a multi-module converter (MMC) (130), and a grid related compensation system (120). The MMC includes multiple half bridge type conversion modules. The series compensation inductor has a first inductor and a second inductor connected in series between the half bridge type conversion modules connected to a positive terminal and a negative terminal of an output side of the MMC in series. A system AC input is received through a contact point of a primary side coil of the first inductor and a primary side coil of the second inductor. The grid related compensation system is connected between secondary side coils of the first inductor and the second inductor and a terminal of the system AC input. [Reference numerals] (AA) Load
Abstract translation: 目的：通过控制通过次级侧电路在平滑串联电感器中流动的电流，提供串联补偿半桥多模块转换器，以防止事故中的短路电流。 构成：半桥多模块转换器（100）包括具有变压器结构的串联补偿电感（110），多模块转换器（MMC）（130）和电网相关补偿系统（120）。 MMC包括多个半桥式转换模块。 串联补偿电感器具有串联连接在串联的MMC的正极端子和负极端子的半桥式转换模块之间的第一电感器和第二电感器。 通过第一电感器的初级侧线圈和第二电感器的初级侧线圈的接触点接收系统AC输入。 电网相关补偿系统连接在第一电感器和第二电感器的次级侧线圈和系统AC输入端子之间。 （附图标记）（AA）负载
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公开(公告)号：KR1020110060289A
公开(公告)日：2011-06-08
申请号：KR1020090116833
申请日：2009-11-30
Applicant: 한국전기연구원
CPC classification number: H02P25/22 , H02K17/42 , H02P27/04 , H02P2103/20
Abstract: PURPOSE: A multiple winding type electrical machinery system is provided to enhance an efficiency by being made of plural converters, connected to a multiple winding type electric machinery and a multiply wound wire, and a system side multi-level converter. CONSTITUTION: The multiple winding type generator forms stator windings(122a-122c) with 3 phase insulated multiply wound wires. A rotor(123) rotates by supplying power for a stator winding. A plurality of generator side converters is connected to a generator stator multiple winding. A system side converter is connected to each generator side converter via an individual DC link and at the same time to the system side. Coils forming each phase are divided into plural groups and are wound round a stator(121).
Abstract translation: 目的：提供一种多绕组式电机系统，通过与多绕组式电机和多绕组线连接的多个转换器和系统侧多电平转换器来提高效率。 构成：多绕组式发电机用三相绝缘的多绕线形成定子绕组（122a-122c）。 转子（123）通过为定子绕组供电而旋转。 多个发电机侧转换器连接到发电机定子多个绕组。 系统侧转换器通过单独的DC链路连接到每个发电机侧转换器，并且同时连接到系统侧。 形成各相的线圈分为多组，绕定子（121）缠绕。
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公开(公告)号：KR1020090056110A
公开(公告)日：2009-06-03
申请号：KR1020070123110
申请日：2007-11-30
Applicant: 한국전기연구원
IPC: H02M7/48
Abstract: A switch clamped multi level inverter is provided to reduce ripple of harmonics and a load current by increasing the level of an output voltage. A switch clamped 3-level inverter includes first to fourth switches(21-24) and a DC link capacitor(25). The first to third switches are serially connected. The second and fourth switches are serially connected to a neutral point of the first switch and the third switch. The first to third switches are the same kind of switches. The rated voltage of the fourth switch is twice as much as the rated voltage of the first to third switches.
Abstract translation: 提供开关钳位多电平逆变器，以通过增加输出电压的电平来减少谐波的波动和负载电流。 开关钳位的3电平逆变器包括第一至第四开关（21-24）和直流链路电容器（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。 第一至第三开关是相同类型的开关。 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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公开(公告)号：KR100383579B1
公开(公告)日：2003-05-14
申请号：KR1020000075691
申请日：2000-12-12
Applicant: 한국전기연구원
IPC: G05D3/00
Abstract: PURPOSE: A three-dimensional position control system of a small mover using magnetic force is provided to handle freely a position of a small mover composed of a magnetic body or a permanent magnet. CONSTITUTION: A main electromagnet(1) is used for forming an aperture to position a small mover. Two or more yokes(3) are arranged on both ends of the main electromagnet(1) around the aperture. The yoke(3) has a ring shape. A multitude of auxiliary electromagnets(2) are arranged around the aperture. The auxiliary electromagnets(2) are connected by two yokes(3). The aperture is formed between the main electromagnet(1) and the auxiliary electromagnet(2) in order to position the small mover. The small mover is moved on a three-dimensional space by the main electromagnet(1) and the auxiliary electromagnet(2). The yokes(3) are used for increasing efficiency of the auxiliary electromagnet(2) or supporting the auxiliary electromagnet(2).
Abstract translation: 目的：提供一种利用磁力的小动子的三维位置控制系统，以自由处理由磁体或永磁体组成的小动子的位置。 组成：主电磁铁（1）用于形成一个孔来定位小动子。 主电磁铁（1）两端的开孔周围有两个或两个以上的磁轭（3）。 轭（3）具有环形形状。 许多辅助电磁铁（2）围绕孔布置。 辅助电磁铁（2）由两个轭架（3）连接。 在主电磁体（1）和辅助电磁体（2）之间形成孔以便定位小动子。 主电磁铁（1）和辅助电磁铁（2）使小动子在三维空间上移动。 轭架（3）用于提高辅助电磁体（2）的效率或支撑辅助电磁体（2）。
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公开(公告)号：KR100368839B1
公开(公告)日：2003-01-24
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：提供直驱式龙门架以防止由于减速器或链条引起的噪音，同时缩短提取图像和获得高清图像的时间。 一种直接驱动型门架（100）包括一个框架（101），用于支撑用于获得图象信息的装置; 构成同步电动机的定子，该定子安装在所述框架上，并且在所述定子的内周配置多个线圈而形成磁场; 与定子一起构成同步电动机并安装在定子中并具有沿转子的外周布置的多个永磁体的转子以及用于获得沿着电动机的内周边排列的图像信息的装置 转子; 和与同步电动机电连接的控制单元（104），其控制转子的速度并传送X射线管的位置。
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Patent Agency Ranking
公开(公告)号：KR1020020072077A
公开(公告)日：2002-09-14
申请号：KR1020010012050
申请日：2001-03-08
Applicant: 한국전기연구원
IPC: H02P21/00
Abstract: PURPOSE: A method for controlling an interior permanent magnet synchronous motor is provided to obtain a correct current control reference value by considering change of parameter with respect to the current phase angle as well as the size of current. CONSTITUTION: A method comprises a first step of obtaining, by a finite element analysis, D-axis and Q-axis inductance values of interior permanent magnet synchronous motor(IPMSM)(99) changing in accordance with the size of current and phase angle of current; a second step of producing a neural net estimator(201) for estimating D-axis and Q-axis inductance by learning a neural net through the use of the result of the first step; a third step of calculating size of current and phase angle of current by D-axis and Q-axis currents of IMPSM, and estimating D-axis and Q-axis inductance for all conditions with respect to the size of current and phase angle of current, by using the neural net estimator produced in the second step; and a fourth step of controlling characteristics of current by reflecting the estimated value of D-axis and Q-axis obtained in the third step, to a control system.
Abstract translation: 目的：提供一种用于控制内部永磁同步电动机的方法，通过考虑相对于当前相位角的参数的变化以及电流的大小来获得正确的电流控制参考值。 构成：一种方法包括通过有限元分析获得内部永磁同步电动机（IPMSM）（99）的D轴和Q轴电感值根据电流和相位角的大小而变化的第一步骤 当前; 通过使用第一步骤的结果，通过学习神经网络来产生用于估计D轴和Q轴电感的神经网络估计器（201）的第二步骤; 通过IMPSM的D轴和Q轴电流来计算电流和电流相位角的大小的第三步骤，并且针对所有条件的电流和相位角的大小估计D轴和Q轴电感 ，通过使用第二步产生的神经网络估计器; 以及通过将在第三步骤中获得的D轴和Q轴的估计值反映到控制系统来控制电流特性的第四步骤。
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公开(公告)号：KR1020020046106A
公开(公告)日：2002-06-20
申请号：KR1020000075691
申请日：2000-12-12
Applicant: 한국전기연구원
IPC: G05D3/00
Abstract: PURPOSE: A three-dimensional position control system of a small mover using magnetic force is provided to handle freely a position of a small mover composed of a magnetic body or a permanent magnet. CONSTITUTION: A main electromagnet(1) is used for forming an aperture to position a small mover. Two or more yokes(3) are arranged on both ends of the main electromagnet(1) around the aperture. The yoke(3) has a ring shape. A multitude of auxiliary electromagnets(2) are arranged around the aperture. The auxiliary electromagnets(2) are connected by two yokes(3). The aperture is formed between the main electromagnet(1) and the auxiliary electromagnet(2) in order to position the small mover. The small mover is moved on a three-dimensional space by the main electromagnet(1) and the auxiliary electromagnet(2). The yokes(3) are used for increasing efficiency of the auxiliary electromagnet(2) or supporting the auxiliary electromagnet(2).
Abstract translation: 目的：提供使用磁力的小型动子的三维位置控制系统，以便自由地处理由磁体或永磁体组成的小型动子的位置。 构成：主电磁铁（1）用于形成一个定位小型动子的孔。 两个或更多个轭（3）布置在围绕孔的主电磁体（1）的两端。 轭（3）具有环形。 多个辅助电磁体（2）围绕孔设置。 辅助电磁体（2）通过两个轭（3）连接。 在主电磁体（1）和辅助电磁体（2）之间形成孔，以便定位小型动子。 小电动机通过主电磁体（1）和辅助电磁体（2）在三维空间上移动。 磁轭（3）用于提高辅助电磁体（2）的效率或支撑辅助电磁体（2）。
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公开(公告)号：KR101410731B1
公开(公告)日：2014-06-24
申请号：KR1020130015280
申请日：2013-02-13
Applicant: 한국전기연구원
IPC: H02M7/483
CPC classification number: H02M1/12 , H02J3/36 , H02M1/15 , H02M5/4585 , H02M7/483 , H02M2007/4835 , Y02E60/60
Abstract: The present invention relates to a method for suppressing a circulating current of a modular multi-level converter for high-voltage direct current transmission, capable of completely removing the AC component of the circulating current which is displayed in an HVDC modular multi-level converter in order to reduce costs by selecting a relatively small current of a capacitor and an IGBT which is applied to the modular multi-level converter; of stabilizing sub-module voltage of the converter for the high voltage DC transmission having the modular multi-level converter; of improving the efficiency of multi-level converter; and greatly improving the waveform of the current flowing through a high voltage DC line.
Abstract translation: 本发明涉及一种用于抑制用于高压直流传输的模块化多电平转换器的循环电流的方法，其能够完全去除在HVDC模块化多电平转换器中显示的循环电流的AC分量 通过选择施加到模块化多电平转换器的电容器和IGBT的相对小的电流来降低成本; 稳定用于具有模块化多电平转换器的高压DC传输的转换器的子模块电压; 提高多级转换器的效率; 并大大改善流经高压直流线路的电流的波形。
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公开(公告)号：KR1020140057760A
公开(公告)日：2014-05-14
申请号：KR1020120123903
申请日：2012-11-05
Applicant: 한국전기연구원
CPC classification number: Y02E60/60
Abstract: The present invention relates to a method for restricting a current reference value and a generation reference value of a grid-connected power conversion device and, more specifically, to a method for restricting a current reference value and a generation reference value of a grid-connected power conversion device capable of, even in case of an unbalanced three-phase voltage or a momentary power failure, supplying reactive power while not stopping a renewable energy system. The present invention divides current and voltage data of a grid into a positive-phase and a negative-phase component, uses the positive phase component for controlling active power and reactive power as in the existing technology, and uses the negative-phase component for additional control using a negative-phase component current controller. By performing control in a link with a renewable energy source (a generator) in consideration of the maximum current and active power of the power conversion device, the present invention is able to stably control DC-link voltage and active power and, even in case of an unbalanced three-phase voltage or a momentary power failure, supply reactive power while not stopping the renewable energy system.
Abstract translation: 本发明涉及一种用于限制并网电力转换装置的电流参考值和发电参考值的方法，更具体地说，涉及一种用于限制电网连接的电流参考值和发电参考值的方法 功率转换装置，即使在三相不平衡电压或瞬时停电的情况下也能够提供无功功率而不停止可再生能源系统。 本发明将电网的电流和电压数据划分为正相和负相分量，如现有技术中那样使用正相分量来控制有功功率和无功功率，并使用负相分量作为额外的 使用负相元件电流控制器进行控制。 考虑到功率转换装置的最大电流和有功功率，通过与可再生能源（发电机）的连接进行控制，本发明能够稳定地控制直流母线电压和有功功率， 不平衡的三相电压或瞬时电源故障，在不停止可再生能源系统的同时提供无功功率。
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