Process for switching between mains supply and a frequency inverter and vice versa
    1.
    发明授权
    Process for switching between mains supply and a frequency inverter and vice versa 失效
    电源和变频器之间切换的过程,反之亦然

    公开(公告)号:US06782989B2

    公开(公告)日:2004-08-31

    申请号:US10147702

    申请日:2002-05-16

    IPC分类号: B66B2100

    CPC分类号: B66B25/00 Y02B50/225

    摘要: Process and device for controlling the drive of a conveyor system (10), specifically in the form of an escalator or passenger conveyor, which can be switched from load to no-load operation, comprising a drive motor (26) and a variable frequency converter (42), which is at least controllable with respect to the frequency of its output voltage, wherein, under load, the drive motor (26) is supplied with a line voltage with an essentially constant line frequency and, at no-load, is supplied the output voltage of the variable frequency converter's (42), wherein, prior to a changeover from no-load to load operation, the output frequency of the variable frequency converter (42) is essentially brought with phase accuracy to the line frequency by means of a PLL device (30), and wherein this changeover is brought about as soon as this phase conformance has been realized.

    摘要翻译: 用于控制输送机系统(10)的驱动的过程和装置,特别是能够从负载切换到空载操作的自动扶梯或乘客输送机的形式,包括驱动马达(26)和可变频率转换器 (42),其至少可以相对于其输出电压的频率来控制,其中在负载下,驱动电动机(26)被提供具有基本上恒定的线路频率的线路电压,并且在空载时是 提供可变频变换器(42)的输出电压,其中,在从空载转换到负载操作之前,变频器(42)的输出频率基本上以相对于线路频率的相位精度 的PLL器件(30),并且其中一旦实现了该相位一致性就进行这种切换。

    Speed and direction indicator for elevator systems
    3.
    发明授权
    Speed and direction indicator for elevator systems 有权
    电梯系统的速度和方向指示器

    公开(公告)号:US6161656A

    公开(公告)日:2000-12-19

    申请号:US243360

    申请日:1999-02-01

    IPC分类号: B66B5/00 B66B3/00

    CPC分类号: B66B5/027 B66B5/0087

    摘要: An elevator system includes an electronic driver which transmits a multi-phased electric current through a relay to a motor driving an elevator car. Under normal operating conditions, the motor uses the current from the driver to move the elevator car in a hoistway. When electric power fails, the elevator car is moved by gravity for any necessary rescue or maintenance operations, and consequently moves the motor. The movement of the motor generates a multi-phased electric current therein. The generated current is utilized to power a display panel of a movement indicator, which is automatically connected to the motor by the relay when power fails in the elevator system. The powered display panel informs the operator of the direction and speed of travel of the elevator car.

    摘要翻译: 电梯系统包括电子驱动器,其通过继电器将多相电流传输到驱动电梯轿厢的电动机。 在正常运行条件下,电机使用来自司机的电流将电梯轿厢移动到井道中。 当电力发生故障时,电梯轿厢通过重力移动,进行必要的救援或维护操作,从而使电动机移动。 电动机的运动在其中产生多相电流。 所产生的电流用于为电梯系统中的电力故障时由继电器自动连接到电动机的运动指示器的显示面板供电。 动力显示面板向操作者通知电梯轿厢的行进方向和速度。