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    • 8. 发明授权
    • Process for switching between main supply and a frequency inverter and vice versa for an escalator drive
    • 用于自动扶梯驱动的主电源和变频器之间切换的过程,反之亦然
    • US06626279B2
    • 2003-09-30
    • US10130121
    • 2002-05-15
    • Reinhard HenkelStefan SpannhakeRalph StriplingRichard Markus
    • Reinhard HenkelStefan SpannhakeRalph StriplingRichard Markus
    • B65G1700
    • B66B25/003H02J3/005H02P23/0077
    • A method of controlling the drive of conveyor installation which includes a drive motor (26) and a frequency converter (42) whose output is adjustable, between a load operation and an idle mode, in the form of an escalator (10) or a moving sidewalk, where: in the load operation mode drive motor (26) is supplied with a line voltage at an essentially constant line frequency (fNetz), and in the idle mode with an output voltage of the frequency converter (42); the line voltage and the frequency converter's output voltage are compared with respect to frequency and phase position; the frequency converter (42) is set for an output frequency which has a predetermined spacing (&Dgr;fup, &Dgr;fdown) from the line frequency (fNetz); a demand to switch modes is signalled by a conveyance signal generator (48); and at the point in time (t1, t4), after a demand to switch modes has been signalled, when the output frequency of the converter (42) has reached the predetermined frequency spacing (&Dgr;fup, &Dgr;fdown) from the line frequency (fNetz), and a predetermined phase spacing has been achieved between the frequency converter's output voltage and the line frequency (fNetz), a switch-over signal (58) is emitted to switch the drive motor (26) between the frequency converter supply and the line supply.
    • 一种控制传送装置驱动的方法,其包括驱动电机(26)和变频器(42),其输出可在自动扶梯(10)或移动的形式的负载操作和空闲模式之间调节 人行道,其中:在负载操作模式驱动电动机(26)中以基本恒定的线路频率(fNetz)提供线电压,并且在空转模式下以变频器(42)的输出电压供电; 将线路电压和变频器的输出电压相对于频率和相位位置进行比较; 频率转换器(42)被设置为具有来自线路频率(fNetz)的预定间隔(Deltafup,Deltafdown)的输出频率; 通过传送信号发生器(48)发信号通知切换模式的要求; 在时刻(t1,t4)的时刻(t1,t4)之后,当已经发出切换模式的需求时,当转换器42的输出频率从线路频率(fNetz)达到预定的频率间隔(Deltafup,Deltafdown)时, ,并且在变频器的输出电压和线路频率(fNetz)之间已经实现了预定的相位间隔,发射切换信号(58)以在变频器电源和线路供电之间切换驱动电动机(26) 。