MVME143

MVME143变频器在参数中设定电机的功率、电流、电压、转速、大频率，这些参数可以从电机铭牌中直接得到。

跳频

在某个频率点上，有可能会发生共振现象，特别在整个装置比较高时； 在控制压缩机时，要避免压缩机的喘振点。

加减速时间

加速时间就是输出频率从0上升到大频率所需时间，减速时间是指从大频率下降到0所需时间。 通常用频率设定信号上升、下降来确定加减速时间。 在电动机加速时须限制频率设定的上升率以防止过电流，减速时则限制下降率以防止过电压。

加速时间设定要求：将加速电流限制在变频器过电流容量以下，不使过流失速而引起变频器跳闸； 减速时间设定要点是：防止平滑电路电压过大，不使再生过压失速而使变频器跳闸。 加减速时间可根据负载计算出来，但在调试中常采取按负载和经验先设定较长加减速时间，通过起、停电动机观察有无过电流、过电压报警； 然后将加减速设定时间逐渐缩短，以运转中不发生报警为原则，重复操作几次，便可确定出佳加减速时间。

MVME143 

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MVME143