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28 条记录 (耗时 0.017 秒)

    Method for measuring characteristic constants of alternating current motor and controller thereof based on said method
    22.
    发明公开
    Method for measuring characteristic constants of alternating current motor and controller thereof based on said method 失效
    基于所述方法测量交流电动机及其控制器的特性常数的方法

    公开(公告)号：EP0588213A3

    公开(公告)日：1994-11-23

    申请号：EP93114332.5

    申请日：1993-09-07

    申请人： HITACHI, LTD.

    发明人： Sakai, Keijiro ,  Endo, Tsunehiro ,  Okuyama, Toshiaki ,  Fujii, Hiroshi

    IPC分类号： H02P5/40 ,  G01R31/34

    CPC分类号： H02P21/04 ,  H02P21/16 ,  H02P21/34 ,  H02P2207/01

    摘要： An inverter (4) corrects an output voltage by the magnitude of output voltage error due to a dead time and an ON-state voltage drop in power elements to energize an AC motor (5) in a manner of single phase alternating current excitation, calculating an active component of current Iq and a reactive component of current Id from the phase ϑ of an excitation voltage vector and a detected instantaneous current value iu, measuring characteristic constants of the motor, a combined resistance ( r₁ + r₂ ) and a combined leakage inductance ( l₁ + l₂ ) from an excitation voltage command value Vc₁, Id and Iq. The measured values are used as the control constants for a speed sensorless vector control (7). Further, the resistances r₁, r₂, and a self-inductance L₁ which are control constants can be obtained based on the component in a primary voltage vector direction of a primary current vector Iq' and the component π/2 delayed from the primary voltage vector direction of the primary current vector Id'. According to the present invention, the characteristic constants can accurately be measured without any inverter output voltage sensor.

    摘要翻译： 逆变器（4）通过以单相交流励磁的方式对由交流电动机（5）通电的功率元件中的死区时间和接通状态电压降引起的输出电压误差的大小进行校正，计算 从激励电压矢量的相位θ和检测到的瞬时电流值iu中计算电流Iq的有功分量和电流Id的无功分量，测量电动机的特性常数，组合电阻（r1 + r2）和组合漏感 （I 1 + I 2）与励磁电压指令值Vc 1，Id和Iq相加。 测量值被用作无速度传感器矢量控制的控制常数（7）。 此外，可以基于初级电流矢量Iq'的初级电压矢量方向上的分量和从初级电压矢量延迟的分量π/ 2来获得作为控制常数的电阻r 1，r 2和自感L 1 主电流矢量Id'的方向。 根据本发明，可以在没有任何逆变器输出电压传感器的情况下准确地测量特性常数。

    Control method and device for AC motor
    25.
    发明公开
    Control method and device for AC motor 失效
    Verfahren und Vorrichtung zum Steuern eines Wechselstrommotors。

    公开(公告)号：EP0417805A1

    公开(公告)日：1991-03-20

    申请号：EP90117738.6

    申请日：1990-09-14

    申请人： HITACHI, LTD.

    发明人： Sakai, Keijiro ,  Endo, Tunehiro ,  Kubota, Yuzuru ,  Ikimi, Takashi ,  Mutoh, Nobuyoshi ,  Honbu, Mitsuyuki

    IPC分类号： H02M5/458 ,  H02P7/62

    CPC分类号： H02M5/4585

    摘要： In a control method and device for an AC motor (5), when transforming output power of a converter (3) to AC power by an inverter (6) and controlling the AC motor (5) with the AC power, a source current value is determined from the value of an electric variable in the input or output side of the inverter (6), and the converter (3) is controlled in accordance with the source current value. This makes the source current free from an influence of ripple components. Accordingly, even when the load of the AC motor (5) is fluctuated abruptly, the required AC power can be applied to the converter following such fluctuations.

    摘要翻译： 在用于交流电动机（5）的控制方法和装置中，当通过逆变器（6）将变换器（3）的输出功率转换为交流电力并且用交流电源控制交流电动机（5）时，源极电流值 根据逆变器（6）的输入或输出侧的电变量的值确定，并且根据源电流值来控制转换器（3）。 这使得源电流不受纹波分量的影响。 因此，即使在交流电动机（5）的负载突然变动的情况下，也可以根据这种波动对转换器施加所需的交流电力。

    A control apparatus for rectifying circuits
    27.
    发明公开
    A control apparatus for rectifying circuits 失效
    一种用于修复电路的控制装置

    公开(公告)号：EP0199903A3

    公开(公告)日：1987-10-07

    申请号：EP86101424

    申请日：1986-02-04

    申请人： HITACHI, LTD.

    发明人： Muto, Nobuyoshi ,  Sakai, Keijiro ,  Suzuki, Toshio ,  Ueda, Akiteru ,  Nando, Kenji ,  Okajima, Ikuo

    IPC分类号： H02M03/10

    CPC分类号： H02M3/157

    摘要： A single phase, full wave diode bridge circuit (20) is connected with a chopper (30) on its DC output side. The output voltage of the chopper (30) is smoothed by a smoothing capacitor (40) and thereafter supplied to a load (50). A current control apparatus (80-100) forms a current reference signal which is synchronized with an AC voltage applied to the bridge circuit (20) and has a magnitude corresponding to the current flowing through the load (50) and produces a deviation signal between the current reference signal and an actual AC input current of the bridge circuit (20). The chopper (30) 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 is improved.