公开(公告)号：KR1020040061605A

公开(公告)日：2004-07-07

申请号：KR1020020087885

申请日：2002-12-31

Applicant: 한국전기연구원

Inventor： 박정우 ,  김종무 ,  문창호

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/54 ,  G01R15/185

Abstract: PURPOSE: A current compensating method is provided to reduce a speed ripple by converting the estimated load torque component into a compensating current and adding the compensating current to a driving current component. CONSTITUTION: A current compensating method comprises a step of estimating, in a real time basis, the eccentric load torque which gives influences to a speed ripple so as to the remove the speed ripple generated from the eccentric load, by applying an eccentric load torque estimator and a torque-current converter to the vector control algorithm of a permanent synchronous motor adopting the maximum torque control system per unit current; and a step of converting the estimated eccentric load torque component into a compensating current of sine wave, and adding the compensating current to a driving current component.

Abstract translation: 目的：提供电流补偿方法，通过将估计的负载转矩分量转换为补偿电流并将补偿电流加到驱动电流分量来减小速度纹波。 构成：电流补偿方法包括以下步骤：实时估算偏心负载转矩，其对速度波动产生影响，以便通过施加偏心负载转矩估计器来消除由偏心负载产生的速度波动 以及采用每单位电流最大转矩控制系统的永磁同步电动机矢量控制算法的转矩电流转换器; 以及将估计的偏心负载转矩分量转换为正弦波的补偿电流并将补偿电流加到驱动电流分量的步骤。

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

Inventor： 박정우 ,  김종무 ,  문창호

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。

公开(公告)号：KR100427477B1

公开(公告)日：2004-04-28

申请号：KR1020010080064

申请日：2001-12-17

Applicant: 한국전기연구원

Inventor： 박정우 ,  문창호

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大小和相位施加的补偿电流加到驱动电流分量上来减小速度波动。 本发明提供一种速度控制装置，其特征在于，包括：AC / DC变换器（301,302），其用于对施加于上述电动机的三相电流中的两相交流电流进行变换; 三相二相坐标变换单元（303），用于将转换后的直流电流转换为d和q轴的两相电流; 速度检测单元（304），用于检测电动机的速度; 比例积分控制器（305），用于对参考速度与检测速度之间的变化进行比例积分控制; 限制器（306），用于限制相对于输入波形的幅度; 控制电流补偿单元（309），用于补偿输入到电机的控制电流; 电压指令补偿单元（310），用于补偿输入到电机的电压指令; 两相三相坐标逆变换单元（311），用于将d和q轴的两相电压变换成三相电压; 脉冲宽度调制单元（312），用于调制和输出三相电压的脉冲宽度; 逆变器（313），用于通过对输入到电机的三相电压进行开/关控制操作来控制电机的操作; 以及插入在限制器和控制电流补偿单元之间的偏心负载转矩估计器（307），该偏置负载转矩估计器接收来自三相 - 二相坐标变换单元变换的两相电流中的电流和检测到的电动机的速度 由速度检测单元根据偏心负载估计转矩并输出估计值。

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

Inventor： 박정우 ,  문창호

IPC: A61B6/03

CPC classification number: A61B6/54 ,  A61B6/035

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。

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

Inventor： 박정우 ,  김종무 ,  문창호

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/44 ,  A61B6/547

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）。