IC697BEM731Z

IC697BEM731Z

IC697BEM731Z

18 、转矩提升问题

自控系统的设定信号可通过变频器灵活自如地指挥频率变化，控制工艺指标，如在烟草行业的糖料、香料工序，可由皮带称的流量信号来控制变频器频率，使泵的转速随流量信号自动变化，调节加料量，均匀地加入香精、糖料。也可利用生产线起停信号通过正、反端子控制变频器的起、停及正、反转，成为自动流水线的一部分。此外在流水生产线上，当前方设备有故障时后方设备应自动停机。变频器的紧急停止端可以实现这一功能。在SANKEN、MF、FUT和FVT系列变频器中可以预先设定三四个甚至多达七个频率，在有些设备上可据此设置自动生产流程。设定好工作频率及时间后，变频器可使电机按顺序在不同的时间以不同的转速运行，形成一个自动的生产流程。

19、电机超过50HZ时应注意什么问题?

1)机械和装置在该转速下运转要充分可能(机械强度、噪声、振动等)

2)电机进入恒功率输出范围，其输出转矩要能够维持工作(风机、泵等轴输出功率与速度 的立方成比例增加，所以转速少许升高时要注意)

3)产生轴承寿命问题，要充分加以考虑。

4)对于中容量以上的电机特别是2级电机，在50HZ以上运转时要特别注意。

20、要想提高输送带的速度，以80HZ运转，变频器的容量该怎样选择?

设基准速度为50HZ，50HZ以上为恒功率输出特性。像输送带这样的恒转矩负载增速时，容量需要增大为80/50=1。6倍。电机容量也像变频器一样增大。

备货，备货，降降降，火火火，火火火……
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公司名称：厦门泰尼电气有限公司
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