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1.加速时间的设定
?异步电动机在额定频率和电压下直接启动时,启动电流很大。使用变频器后,由于其输出频率可以从很低时开始,频率上升的快慢可以任意设定,从而可以有效地将启动电流限制在一定范围内。
?从减小电动机启动电流的角度来说,加速时间应设定得长一些,但若加速时间过长会影响系统的效率。
?2.减速时间的设定
?变频器减速时间有两种:一种是工作频率从基本频率降到0Hz所需的时间;另一种是工作频率从高频率降低到0Hz所需的时间。所有变频器中,减速时间的设定范围和升速时间相同。
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