描述
單相罩極式異步電動(dòng)機(jī)的結(jié)構(gòu)分為凸極式和隱極式兩種,原理完全一樣,只是凸極式結(jié)構(gòu)更為簡單一些。凸極式單相罩極異步電動(dòng)機(jī)的主要結(jié)構(gòu)如圖1a)所示。其轉(zhuǎn)子仍然是普通的籠型轉(zhuǎn)子,但其定子都有凸起的磁極。在每個(gè)磁極上有集中繞組,即為主繞組。極面的一邊約1/3處開有小槽,經(jīng)小槽放置一個(gè)閉合的銅環(huán)K,叫短路環(huán),把磁極的小部分罩起來,故稱之為罩極式異步電動(dòng)機(jī)
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