利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

21 条记录 (耗时 0.019 秒)

    Control apparatus for PWM inverter
    1.
    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。

    PWM inverter apparatus for controlling rotating magnetic flux in a.c. motors
    4.
    发明授权
    PWM inverter apparatus for controlling rotating magnetic flux in a.c. motors 失效
    用于控制直流电机中的旋转磁通量的PWM逆变器装置 电机

    公开(公告)号：US5023538A

    公开(公告)日：1991-06-11

    申请号：US380039

    申请日：1989-07-14

    申请人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Akiteru Ueda ,  Hiroshi Fujii

    发明人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Akiteru Ueda ,  Hiroshi Fujii

    IPC分类号： H02M7/48 ,  H02M7/529 ,  H02P21/00 ,  H02P21/14 ,  H02P27/04

    CPC分类号： H02M7/529 ,  H02P21/141

    摘要： A PWM inverter apparatus used for driving an a.c. motor, including an inverter having an output part connected to the a.c. motor and switching elements on-off controlled by a PWM signal. The inverter apparatus also includes a part for receiving, at an interval of a given sampling period, status command information specifying a desired status of a vector of a rotating magnetic flux in the a.c. motor; a part for predicting, on the basis of at least the status command information received at each sampling time, the status of the vector of the rotating magnetic flux which will be produced at a next sampling time; a part for calculating a difference vector between the status of the vector of the rotating magnetic flux specified by the status command information received at a present sampling time and the predicted status of the vector of the rotating magnetic flux which will be produced at a next sampling time; a part for synthesizing the difference vector using selected reference voltage vectors from among a plurality of predetermined reference voltage vectors; and a part for generating a PWM signal for controlling the switching elements of the inverter so as to produce the selected reference voltage vectors.

    Rectifier control apparatus with improved power factor
    5.
    发明授权
    Rectifier control apparatus with improved power factor 失效
    整流器控制装置具有改善的功率因数

    公开(公告)号：US4688162A

    公开(公告)日：1987-08-18

    申请号：US841425

    申请日：1986-03-19

    申请人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Toshio Suzuki ,  Akiteru Ueda ,  Kenji Nandoh ,  Ikuo Okajima

    发明人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Toshio Suzuki ,  Akiteru Ueda ,  Kenji Nandoh ,  Ikuo Okajima

    IPC分类号： G05F1/70 ,  H02M3/00 ,  H02M3/157 ,  H02M7/06 ,  H02M7/12

    CPC分类号： H02M3/157

    摘要： A single phase, full wave diode bridge circuit is connected with a chopper on its DC output side. An output voltage of the chopper is smoothed by a smoothing capacitor and thereafter supplied for a load. A current control apparatus forms a current reference signal which is synchronized with an AC voltage applied to the bridge circuit and has a magnitude corresponding to a current flowing through the load and produces a deviation signal between the current reference signal and an actual AC input current of the bridge circuit. The chopper is controlled in accordance with the deviation signal so that the AC input current follows the current reference signal, whereby the power factor and the waveform of the AC input current in the bridge circuit are improved.

    摘要翻译： 单相全波二极管桥式电路与直流输出侧的斩波器相连。 斩波器的输出电压由平滑电容器平滑化，然后供给负载。 电流控制装置形成与施加到桥式电路的AC电压同步的电流参考信号，并且具有与流过负载的电流相对应的大小，并产生电流参考信号与实际交流输入电流之间的偏差信号 桥电路。 根据偏差信号控制斩波器，使交流输入电流跟随电流参考信号，从而提高桥式电路中的交流输入电流的功率因数和波形。

    Method and apparatus for controlling PWM inverters
    6.
    发明授权
    Method and apparatus for controlling PWM inverters 失效
    控制PWM逆变器的方法和装置

    公开(公告)号：US4599549A

    公开(公告)日：1986-07-08

    申请号：US723646

    申请日：1985-04-16

    申请人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Akiteru Ueda ,  Akira Ishibashi ,  Ikuo Okajima

    发明人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Akiteru Ueda ,  Akira Ishibashi ,  Ikuo Okajima

    IPC分类号： H02M7/5387 ,  H02P23/04 ,  H02P25/02 ,  H02P27/08 ,  H02P5/40

    CPC分类号： H02P27/08 ,  H02M7/53875 ,  H02P23/04 ,  H02P25/024 ,  H02P27/047

    摘要： An AC motor such as an induction motor or a synchronous motor is driven by a PWM inverter circuit. Power switching elements of the inverter circuit are ignited by PWM pulses resulting from comparison of a carrier wave signal with a sine wave modulation signal at a frequency proportional to a frequency setting signal so as to control the inverter circuit. A current polarity detector detects positive and negative components of a DC current flowing in the input side of the inverter circuit. The frequency setting signal is so corrected as to be decreased when only the positive current component flows in excess of one period of the carrier wave signal or increased when only the negative current component flows in excess of the one period.

    摘要翻译： 诸如感应电动机或同步电动机的AC电动机由PWM逆变电路驱动。 逆变器电路的电源开关元件由PWM脉冲点燃，脉冲是以与频率设定信号成比例的频率比较载波信号与正弦波调制信号，从而控制逆变器电路。 电流极性检测器检测在逆变器电路的输入侧流动的直流电流的正和负分量。 当只有正电流分量流过超过载波信号的一个周期时，频率设定信号被校正为减小，或者仅在负电流分量流过超过一个周期时增加。

    Linear motor and X-Y stage
    7.
    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。

    Control system for induction motor using inverter for AC power supply
    9.
    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。

    Linear motor and X-Y stage
    10.
    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。