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    • 4. 发明授权
    • Levelling apparatus for AC elevator
    • 交流电梯调平装置
    • US4094385A
    • 1978-06-13
    • US677071
    • 1976-04-14
    • Yasuyuki MaedaNobuo MitsuiTadao KameyamaKatsu Komuro
    • Yasuyuki MaedaNobuo MitsuiTadao KameyamaKatsu Komuro
    • B66B1/36B66B1/16B66B1/24B66B1/28B66B1/30B66B1/40B66B1/50
    • B66B1/50B66B1/285B66B1/308B66B1/40Y02B50/125
    • In an a-c elevator, an elevator car suspended by ropes is driven by an induction motor for vertical movement. A system commonly used for controlling the device including thyristors connected in parallel with opposite polarities across a three-phase a-c power source and the induction motor for controlling the motoring torque produced by the induction motor, a bridge rectifier including a thyristor for supplying direct current to the induction motor for controlling the braking torque produced by the induction motor, and means for controlling the operating phase of the thyristors in the thyristor device and the thyristor in the bridge rectifier depending on the error between the instructed speed and the actual speed of the elevator car. When the elevator car stops at a target floor and passengers get on and off the elevator car, the variation in the load of the elevator car results in an increase or decrease in the length of the ropes thereby giving rise to an error between the floor level of the target floor and that of the elevator car. A levelling apparatus is provided which comprises a position detector detecting this level error in either direction, and a level correction speed pattern signal generator generating a level correction speed pattern signal in response to the appearance of an output from the position detector, so that the operating phase of the thyristors in the thyristor device and the thyristor in the bridge rectifier can be controlled depending on the error between the level correction speed pattern and the actual speed of the elevator car.
    • 在a-c电梯中,由绳索悬挂的电梯轿厢由用于垂直运动的感应电动机驱动。 一种通常用于控制包括跨三相交流电源并联连接的晶闸管的装置和用于控制由感应电动机产生的电动转矩的感应电动机的系统,包括用于将直流供电的晶闸管的桥式整流器 用于控制由感应电动机产生的制动转矩的感应电动机,以及用于根据指示速度和电梯的实际速度之间的误差来控制桥式整流器中的晶闸管装置和晶闸管中的晶闸管的操作相位的装置 汽车。 当电梯轿厢停在目标楼层并且乘客上下电梯轿厢时,电梯轿厢的负载变化导致绳索长度的增加或减少,从而导致楼层等级之间的误差 的目标楼层和电梯轿厢的。 提供一种调平装置,其包括位置检测器,以检测任一方向上的该电平误差;以及电平校正速度模式信号发生器,响应于来自位置检测器的输出的出现而产生电平校正速度模式信号,使得操作 晶闸管装置中的晶闸管的相位和桥式整流器中的晶闸管可以根据电平校正速度模式和电梯轿厢的实际速度之间的误差来控制。