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8 条记录 (耗时 0.012 秒)

    Direct current detecting device using saturable reactors
    3.
    发明公开
    Direct current detecting device using saturable reactors 失效
    通过使用饱和电抗器来检测直流的装置。

    公开(公告)号：EP0010921A1

    公开(公告)日：1980-05-14

    申请号：EP79302318.5

    申请日：1979-10-24

    申请人： Hitachi, Ltd.

    发明人： Nakamura, Kiyoshi ,  Ishikawa, Hiroaki ,  Kiwaki, Hisakatsu ,  Ogata, Fumio

    IPC分类号： G01R19/00

    CPC分类号： G01R19/20 ,  G01R15/185

    摘要： A direct current detecting device is disclosed in which two pairs of saturable cores (11, 12; 13, 14) are provided so as to enclose a conductor (21) carrying a direct current to be measured. On each core, a bias winding (51-54), a feedback winding (41-44) and an output winding (31-34) are wound. First and second output circuits (1, 2) are provided, each connected with one pair of output windings and including two closed current paths each consisting of one of the output windings, a common load (63; 64), a common a.c. supply source (61; 62) and a diode (75, 76; 77, 78). These diodes function to allow the greater one of current flows of the two closed paths to be passed through the common load, in order to give an output signal in which slits or notches are reduced. An amplifier (100) is connected to receive the difference between output signals of the two output circuits and to supply its output to the feedback winding, whereby the magnitude of the feedback current becomes a function of the magnitude of the current flowing through the conductor and can be measured by an indicator 102.

    摘要翻译： 一种直流检测装置是将盘游离缺失2双饱和磁芯;被设置以包围承载直流电流的导体（21）被测量（11，12 13，14）。 在每个核上，偏置绕组（51-54），反馈绕组（41-44），并输出绕组（31-34）被卷绕。 第一和第二输出电路（1,2）被提供，每个具有一对输出绕组的连接和两个闭合包括电流路径的输出绕组中的一个，一个公共负载（63; 64）的每个包括，一个共同的交流 供给源（61; 62）和一个二极管（75，76; 77，78）。 这些二极管的功能，以允许两个闭合路径中的电流流动的更大的一个通过共同的负载传递中，为了得到在其中切缝或切口被减少的输出信号。 放大器（100）被连接来接收所述两个输出电路的输出信号之间的差并且将其输出提供给反馈绕组，由此，反馈电流的幅度变为流动的电流的大小的函数，通过所述导体和 可以通过指示器第一百零二来测量

    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。