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21 条记录 (耗时 0.017 秒)

    Control system for induction motor using inverter for AC power supply
    1.
    发明授权
    Control system for induction motor using inverter for AC power supply 失效
    用于交流电源的异步电动机控制系统

    公开(公告)号：US4420718A

    公开(公告)日：1983-12-13

    申请号：US326809

    申请日：1981-12-02

    申请人： Keijiro Sakai ,  Yasuo Matsuda ,  Mitsuyuki Honbu

    发明人： Keijiro Sakai ,  Yasuo Matsuda ,  Mitsuyuki Honbu

    IPC分类号： H02P27/06 ,  H02P5/40

    CPC分类号： H02P27/06 ,  H02P27/047

    摘要： An control system for an induction motor driven by an AC output of variable frequency and voltage produced from an inverter which converts DC power obtained by a converter through conversion of AC power having constant voltage and constant frequency. The system comprises means for estimating the power factor of the induction motor from an input current to the inverter, means for controlling the voltage of the AC output from the inverter when the estimated power factor is outside a predetermined range, and means for restricting the control of the AC output voltage to prevent the ratio between the AC output voltage and the AC output frequency from exceeding a predetermined range.

    摘要翻译： 一种感应电动机的控制系统，由变频器产生的可变频率和电压的交流输出驱动，该转换器通过转换具有恒定电压和恒定频率的交流电源转换由转换器获得的直流电力。 该系统包括用于从输入电流向逆变器估计感应电动机的功率因数的装置，用于在估计功率因数超出预定范围时控制来自逆变器的AC输出的电压的装置，以及用于限制控制的装置 的交流输出电压，以防止AC输出电压和AC输出频率之间的比例超过预定范围。

    Method and apparatus for controlling induction motor
    5.
    发明授权
    Method and apparatus for controlling induction motor 失效
    感应电动机控制方法及装置

    公开(公告)号：US4437051A

    公开(公告)日：1984-03-13

    申请号：US441624

    申请日：1982-11-15

    申请人： Nobuyoshi Muto ,  Hiroshi Nagase ,  Keijiro Sakai ,  Yasuo Matsuda

    发明人： Nobuyoshi Muto ,  Hiroshi Nagase ,  Keijiro Sakai ,  Yasuo Matsuda

    IPC分类号： H02P21/00 ,  H02P21/08 ,  H02P27/04 ,  H02P5/40

    CPC分类号： H02P21/09 ,  H02P2207/01

    摘要： Disclosed is a method and apparatus for operating an induction motor by an inverter of the pulse-width modulation (PWM) type, wherein the slip frequency is calculated from the speed command and the actual motor speed so as to produce the phase compensation signal, and the frequency command for the inverter is produced by adding the phase compensation signal, the slip frequency signal and the motor speed signal. The primary current command is calculated from the slip frequency, the amplitude ratio of pulse-width modulation is calculated basing on the primary current command and the actual primary current, and the inverter is controlled in accordance with the amplitude ratio so as to control the primary current of the induction motor.

    摘要翻译： 公开了一种通过脉宽调制（PWM）型逆变器操作感应电动机的方法和装置，其中根据速度指令和实际电动机速度计算转差频率，以产生相位补偿信号;以及 通过将相位补偿信号，转差频率信号和电动机速度信号相加来产生变频器的频率指令。 初始电流指令是根据转差频率计算的，脉冲宽度调制的幅度比是根据初级电流指令和实际一次电流来计算的，并根据振幅比来控制变频器，以控制主电流 感应电机的电流。

    Linear motor and X-Y stage
    6.
    发明申请
    Linear motor and X-Y stage 失效
    线性电机和X-Y级

    公开(公告)号：US20050104454A1

    公开(公告)日：2005-05-19

    申请号：US10920450

    申请日：2004-08-18

    申请人： Houng Kim ,  Keijiro Sakai ,  Hitoshi Shibata

    发明人： Houng Kim ,  Keijiro Sakai ,  Hitoshi Shibata

    IPC分类号： H02K41/00 ,  H02K41/02 ,  H02K41/03

    CPC分类号： H02K41/03 ,  H02K2201/18

    摘要： A linear motor for generating a linear motion in a linear direction, has a plurality of first members, each of which includes an electromagnetic coil for generating a first magnetic field, and a magnetic core (magnetically permeable) having magnetic surfaces being opposite to each other so that the first magnetic field passes a space between the magnetic surfaces, and a second member arranged in the spaces to be relatively movable linearly with respect to a combination of the first members to generate the linear motion in the linear direction, and including a magnet polarized in a polarizing direction to generate a second magnetic field.

    摘要翻译： 用于在线性方向上产生线性运动的线性电动机具有多个第一构件，每个第一构件包括用于产生第一磁场的电磁线圈和具有彼此相对的磁性表面的磁芯（磁性可渗透） 使得第一磁场通过磁性表面之间的空间，并且布置在空间中的第二构件相对于第一构件的组合线性地相对移动以在线性方向上产生线性运动，并且包括磁体 偏振方向偏振以产生第二磁场。

    Linear motor and X-Y stage
    7.
    发明授权
    Linear motor and X-Y stage 失效
    线性电机和X-Y级

    公开(公告)号：US07250696B2

    公开(公告)日：2007-07-31

    申请号：US10920450

    申请日：2004-08-18

    申请人： Houng Joong Kim ,  Keijiro Sakai ,  Hitoshi Shibata

    发明人： Houng Joong Kim ,  Keijiro Sakai ,  Hitoshi Shibata

    IPC分类号： H02K41/03

    CPC分类号： H02K41/03 ,  H02K2201/18

    摘要： A linear motor for generating a linear motion in a linear direction, has a plurality of first members, each of which includes an electromagnetic coil for generating a first magnetic field, and a magnetic core (magnetically permeable) having magnetic surfaces being opposite to each other so that the first magnetic field passes a space between the magnetic surfaces, and a second member arranged in the spaces to be relatively movable linearly with respect to a combination of the first members to generate the linear motion in the linear direction, and including a magnet polarized in a polarizing direction to generate a second magnetic field.

    摘要翻译： 用于在线性方向上产生线性运动的线性电动机具有多个第一构件，每个第一构件包括用于产生第一磁场的电磁线圈和具有彼此相对的磁性表面的磁芯（磁性可渗透） 使得第一磁场通过磁性表面之间的空间，并且布置在空间中的第二构件相对于第一构件的组合线性地相对移动以在线性方向上产生线性运动，并且包括磁体 偏振方向偏振以产生第二磁场。

    Method of inverter control and apparatus of the same
    9.
    发明授权
    Method of inverter control and apparatus of the same 有权
    变频器控制方法及其设备

    公开(公告)号：US06229719B1

    公开(公告)日：2001-05-08

    申请号：US09655489

    申请日：2000-09-05

    申请人： Keijiro Sakai ,  Toshiaki Okuyama ,  Hiroshi Fujii

    发明人： Keijiro Sakai ,  Toshiaki Okuyama ,  Hiroshi Fujii

    IPC分类号： H02M540

    CPC分类号： H02P21/18 ,  H02P21/22 ,  H02P21/26

    摘要： An inverter control apparatus includes an instruction calculator which receives a speed instruction and a particular component of a current of a motor to obtain an output frequency instruction and output voltage instructions of an inverter and a current estimator to estimate, according to a reference phase obtained by integrating a current detection value of one phase of an ac motor and an output frequency instruction thereof, currents of other phases of the ac motor. The current estimator includes a uvw/dq converter which converts a fixed coordinate system into a rotating coordinate system, a dq/uvw converter which is connected to the uvw/dq converter and which converts the rotating coordinate system into the fixed coordinate system, and a closed loop to input an output from the dq/uvw converter to the uvw/dq converter. This system can therefore estimate currents of other phases according to the motor current of one phase.

    摘要翻译： 逆变器控制装置包括指令计算器，其接收速度指令和电动机的电流的特定分量，以获得反相器和电流估计器的输出频率指令和输出电压指令，以根据由 集成交流电动机的一相的电流检测值和其输出频率指令，交流电动机的其他相的电流。 电流估计器包括将固定坐标系转换为旋转坐标系的uvw / dq转换器，连接到uvw / dq转换器并将旋转坐标系转换成固定坐标系的dq / uvw转换器， 闭环将dq / uvw转换器的输出输入到uvw / dq转换器。 因此，该系统可以根据一相的电机电流来估计其他相的电流。

    Control apparatus for PWM inverter
    10.
    发明授权
    Control apparatus for PWM inverter 失效
    PWM逆变器控制装置

    公开(公告)号：US4562524A

    公开(公告)日：1985-12-31

    申请号：US664773

    申请日：1984-10-25

    申请人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Motonobu Hattori ,  Yuichiro Nagato

    发明人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Motonobu Hattori ,  Yuichiro Nagato

    IPC分类号： H02M7/48 ,  H02M7/217

    CPC分类号： H02M7/53873

    摘要： A control apparatus for producing a pulse width modulating signal to be used for operation of a PWM inverter wherein a modulating wave of a sinusoidal waveform corresponding to the desired AC output voltage of the inverter is sampled at selected periodical time intervals to obtain a level of the modulating wave at each sampling point and the interval is arithmetically determined between each sampling time point and a time point which appears between the sampling point and the next sampling point and at which time point a virtual triangular waveform, which has positive and negative peaks of a predetermined amplitude occurring alternately at the selected periodical time interval, takes the same level as the sampled level of the modulating wave. On the basis of the time interval, the PWM signal is produced.

    摘要翻译： 一种用于产生用于PWM逆变器的操作的脉宽调制信号的控制装置，其中以选定的周期时间间隔采样对应于逆变器的期望AC输出电压的正弦波形的调制波，以获得 在每个采样点处的调制波和间隔在每个采样时间点和出现在采样点和下一个采样点之间的时间点之间算术确定，并且在该时间点，具有正，负峰值的虚拟三角波形 在选定的周期时间间隔交替出现的预定幅度与调制波的采样电平相同。 基于时间间隔，产生PWM信号。