6ES7232-4HD32-0XB0
1、變頻器的輸出頻率設定變頻器的輸出頻率可通過下述方式設定。
①操作面板上的功能鍵設置頻率。
②功能參數碼進行預置。
③操作面板上的電位器設定頻率。
④外端子控制頻率,包含三種設置頻率的方法,即外部模擬量設定、多段調速設定(也稱為開關量設定)和網絡通信設定。
2、極限頻率和回避頻率
(1)高頻率fmax變頻器允許輸出的高頻率,一般為電動機的額定頻率。在西門子MM440中,在P10
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82中設定,如P1082=50Hz,在我國工頻為50Hz,因此在很多場合高頻率設為50Hz。但有的電動機自身轉速超過50Hz的除外(如變頻電動機)。
(2)基本頻率fb又稱基準頻率或基底頻率,只有在U/f模式下才設定。它是指當輸出電壓U=UN(額定電壓)時,f達到的值fN,一般為額定頻率。變頻器的輸出頻率和電壓的關系