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    • 8. 发明授权
    • Elevator system
    • 电梯系统
    • US3902572A
    • 1975-09-02
    • US41975973
    • 1973-11-28
    • WESTINGHOUSE ELECTRIC CORP
    • OSTRANDER WILLIAM M
    • B66B1/24B66B1/16B66B1/28B66B1/30B66B1/52B66B5/06
    • B66B1/30B66B1/285Y02B50/125Y02B50/142
    • An elevator system having speed control apparatus providing first, second and third acceleration modes which provide progressively higher maximum speeds for an elevator car. Control circuitry associated with each landing to be served by the elevator car is successively enabled in response to the location and movement of the elevator car, with the number of floors from the last stop of the elevator car to the floor of the next stop being used to select one of the three acceleration modes. Protective apparatus responsive to the voltage across the armature circuit of the elevator drive motor is also provided which stops the elevator car when the rate of change of this voltage exceeds a predetermined magnitude, or the magnitude and polarity of the voltage indicates the elevator car is traveling at or above a predetermined speed in a direction opposite to the travel direction selected by the control circuitry.
    • 一种具有速度控制装置的电梯系统,其提供第一,第二和第三加速模式,其为电梯轿厢提供逐渐更高的最大速度。 与电梯轿厢服务的每个着陆相关联的控制电路相应地响应于电梯轿厢的位置和移动被依次启用,其中从电梯轿厢的最后停止到下一个停止的地板的楼层的数量被使用 选择三种加速模式之一。 还提供了响应电梯驱动电动机的电枢电路两端的电压的保护装置,当该电压的变化率超过预定值时停止电梯轿厢,或者电压的大小和极性表示电梯轿厢行驶 在与由控制电路选择的行进方向相反的方向上等于或高于预定速度。