A.Y-△降壓起動(dòng) B.定子回路串電阻 C.轉(zhuǎn)子回路串電阻 D.自耦變壓器 E.延邊三角形
A.旋轉(zhuǎn)磁場(chǎng) B.脈動(dòng)磁場(chǎng) C.靜磁場(chǎng) D.交變磁場(chǎng)
A.1 B.2 C.3 D.4