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15 条记录 (耗时 0.015 秒)

    Power converter
    4.
    发明公开
    Power converter 失效
    Leistungskonverter。

    公开(公告)号：EP0370388A2

    公开(公告)日：1990-05-30

    申请号：EP89121209.4

    申请日：1989-11-16

    申请人： HITACHI, LTD.

    发明人： Nakata, Kiyoshi ,  Terunuma, Mutsuhiro ,  Kimura, Akira ,  Nakamura, Kiyoshi ,  Ishida, Toshihiko

    IPC分类号： H02M5/27 ,  H02M7/162

    CPC分类号： H02M7/125

    摘要： A power converter comprises a transformer (TR) which converts an ac power source voltage (e₁) into a predeter­mined ac voltage (e₂), a pulse-width modulation converter (CON) connected to the secondary side of the transformer (TR) to convert an ac current into dc current and a control circuit (CTR) which turns on and off a switching element constituting the converter (CON).
    A field distortion detector (DT) detects a quantity of a state related to the field distortion of the transformer (TR) and a compensation circuit (DCC1 or DCC2) supplies the detected value to the control circuit (CTR) so as to generate a dc component corresponding to the detected state quantity signal indicative of the field distortion on the ac side of the pulse-width modulation converter (CON).

    摘要翻译： 电源转换器包括将交流电源电压（e1）转换为预定交流电压（e2）的变压器（TR），连接到变压器（TR）的次级侧的脉冲宽度调制转换器（CON），以转换 直流电流的交流电流和构成转换器（CON）的开关元件的导通和截止的控制电路（CTR）。 场失真检测器（DT）检测与变压器（TR）的场失真有关的状态量，补偿电路（DCC1或DCC2）将检测值提供给控制电路（CTR），以产生直流 分量对应于表示脉冲宽度调制转换器（CON）的ac侧的场失真的检测状态量信号。

    A control system for maintaining the traction of a rolling stock vehicle
    5.
    发明公开
    A control system for maintaining the traction of a rolling stock vehicle 失效
    Regelsystem zur Aufrechterhaltung der Zugleistung eines Schienenfahrzeugs。

    公开(公告)号：EP0189165A2

    公开(公告)日：1986-07-30

    申请号：EP86100705.2

    申请日：1986-01-20

    申请人： HITACHI, LTD.

    发明人： Hirotsu, Tetsuji ,  Kiwaki, Hisakatsu ,  Nakamura, Kiyoshi ,  Narita, Hiroshi ,  Kasai, Syozi ,  Kimura, Akira ,  Tsutsui, Yoshio

    IPC分类号： B60L3/10 ,  B61C15/14

    CPC分类号： B60T8/1705 ,  B60L3/10 ,  B60L2200/26 ,  Y02T10/7258

    摘要： From a peripheral velocity v M of a driving wheel and a vehicle velocity v, the changing rate Δ v s / Δ t of the relative velocity v s therebetween with respect to time is obtained. The changing rate Δ f/ Δ t of the traction force f produced in the driving wheel at that time is obtained from a detected armature current of a motor driving the driving wheel. A driving torque produced by the motor is so controlled as to decrease when polarities of the changing rate in the relative velocity and that in the traction force are different from each other.

    摘要翻译： 根据驱动轮的圆周速度vM和车速v，获得相对于时间的相对速度的变化率DELTA vs / DELTA t。 从驱动驱动轮的电动机的检测到的电枢电流获得当时在驱动轮中产生的牵引力f的变化率DELTA f / DELTA t。 由电动机产生的驱动转矩被控制成随着相对速度的变化率和牵引力的变化率的极性彼此不同而减小。

    Frequency changer
    6.
    发明公开
    Frequency changer 失效
    FREQUENZ-Wandler。

    公开(公告)号：EP0353715A2

    公开(公告)日：1990-02-07

    申请号：EP89114206.9

    申请日：1989-08-01

    申请人： HITACHI, LTD.

    发明人： Nakata, Kiyoshi Yuni Haitsu 202, 1-10 ,  Tanamachi, Tokunosuke ,  Nakamura, Kiyoshi ,  Kimura, Akira ,  Tsutsui, Yoshio

    IPC分类号： H02M5/45 ,  H02M7/5387

    CPC分类号： H02M5/4505

    摘要： In order to suppress a beat phenomenon caused by pulsation of DC voltage in a frequency changer comprising a converter (4) and an inverter (8), the ripple factor of the DC voltage is detected (24, 26, 30). From the ripple factor and the modulated wave, only the beat component (ybu) is detected. In a one-pulse mode, a train of pulses (G up to G wn ) are produced on the basis of the carrier (yc) having the inverter frequency and a beat removing component equivalent to a component obtained by inverting the polarity of the beat component. In a multipulse mode, a train of pulses (G up to G wn ) are produced on the basis of the carrier yc) having the inverter frequency, the beat removing component and the modulated wave. As a result, the beat phenomenon is removed from the output voltage of the inverter.

    摘要翻译： 为了抑制包括变换器（4）和逆变器（8）的变频器中的直流电压的脉动引起的拍频现象，检测直流电压的纹波因数（24,26,30）。 从纹波因子和调制波，仅检测拍子分量（ybu）。 在单脉冲模式中，基于具有逆变器频率的载波（yc）和等效于通过反转拍子分量的极性而获得的分量的拍子去除分量来产生脉冲串（Gup至Gwn）。 在多脉冲模式中，基于具有逆变器频率，拍频去除分量和调制波的载波yc）产生一串脉冲（Gup to Gwn）。 结果，从逆变器的输出电压中除去拍频现象。

    Frequency changer
    9.
    发明公开
    Frequency changer 失效
    频率变化

    公开(公告)号：EP0353715A3

    公开(公告)日：1990-07-04

    申请号：EP89114206.9

    申请日：1989-08-01

    申请人： HITACHI, LTD.

    发明人： Nakata, Kiyoshi Yuni Haitsu 202, 1-10 ,  Tanamachi, Tokunosuke ,  Nakamura, Kiyoshi ,  Kimura, Akira ,  Tsutsui, Yoshio

    IPC分类号： H02M5/45 ,  H02M7/5387

    CPC分类号： H02M5/4505

    摘要： In order to suppress a beat phenomenon caused by pulsation of DC voltage in a frequency changer comprising a converter (4) and an inverter (8), the ripple factor of the DC voltage is detected (24, 26, 30). From the ripple factor and the modulated wave, only the beat component (ybu) is detected. In a one-pulse mode, a train of pulses (G up to G wn ) are produced on the basis of the carrier (yc) having the inverter frequency and a beat removing component equivalent to a component obtained by inverting the polarity of the beat component. In a multipulse mode, a train of pulses (G up to G wn ) are produced on the basis of the carrier yc) having the inverter frequency, the beat removing component and the modulated wave. As a result, the beat phenomenon is removed from the output voltage of the inverter.