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1 有一部直流分激電動機,滿載時,轉速為1100rpm,速率調整率為9.09%,無載時,轉速為多少rpm?
A 1100 rpm
B 2200 rpm
C 1000 rpm
D 1200 rpm

速率調整率S.R.%= n0-nfnf×100%

(n0-1100)/1100=9.09%

n0=1200 rpm