A.轉(zhuǎn)子電壓恒定B.電流恒定C.定子電壓恒定D.恒壓頻比
A.變轉(zhuǎn)差率B.電樞回路串電阻C.降低電源電壓D.減小磁通
A.同步速不變B.最大轉(zhuǎn)差率減小C.最大轉(zhuǎn)矩減小D.起動轉(zhuǎn)矩減小