KL2521 單元模塊

n 表示電動機(jī)的轉(zhuǎn)速，單位是轉(zhuǎn)/分鐘（rpm）；f 表示電源的頻率，單位是赫茲（Hz）；p 表示電動機(jī)的極對數(shù)。

　　這個公式解釋為：每個電動機(jī)極對數(shù) p，每秒會產(chǎn)生 f/p$次的磁極變化，從而產(chǎn)生一個完整的旋轉(zhuǎn)周期。因此，電動機(jī)每分鐘的轉(zhuǎn)數(shù) n 等于每秒的磁極變化次數(shù) f/p 乘以每分鐘的秒數(shù) 60，即

　　這個公式的應(yīng)用非常廣泛，可以用于計算各種類型的電動機(jī)的轉(zhuǎn)速，包括直流電動機(jī)、交流異步電動機(jī)等。但需要注意的是，這個公式只適用于沒有負(fù)載或者輕負(fù)載運(yùn)行的情況，當(dāng)電動機(jī)承受大負(fù)載時，其轉(zhuǎn)速會發(fā)生變化，需要進(jìn)行更加復(fù)雜的計算。

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