140ACO02000C Quantum

伺服電機分為交流伺服和直流伺服兩大類。

交流伺服電機分類

交流伺服電機的基本構(gòu)造與交流感應(yīng)電動機(異步電機)相似。 在定子上有兩個相空間位移90°電角度的勵磁繞組Wf和控制繞組WcoWf，接恒定交流電壓，利用施加到Wc上的交流電壓或相位的變化，達到控制電機運行的目的。 交流伺服電機具有運行穩(wěn)定、可控性好、響應(yīng)快速、靈敏度高以及機械特性和調(diào)節(jié)特性的非線性度指標嚴格(要求分別小于10%～15%和小于15%～25%)等特點。

1、異步型交流伺服電動機

異步型交流伺服電動機指的是交流感應(yīng)電動機。 它有三相和單相之分，也有鼠籠式和線繞式，通常多用鼠籠式三相感應(yīng)電動機。 其結(jié)構(gòu)簡單，與同容量的直流電動機相比，質(zhì)量輕1/2，價格僅為直流電動機的1/3。 缺點是不能經(jīng)濟地實現(xiàn)范圍很廣的平滑調(diào)速，從電網(wǎng)吸收滯后的勵磁電流。 因而令電網(wǎng)功率因數(shù)變壞。

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