A.100 B.90 C.110 D.80
A.UabIacos(300+)+UcbIccos(300–) B.UabIacos(300–)+UcbIccos(300+) C.UabIacos(+300)+UcbIccos(–300)
A.防止?jié)搫?dòng)(空走) B.防止反轉(zhuǎn) C.產(chǎn)生補(bǔ)償轉(zhuǎn)矩提高靈敏度 D.補(bǔ)償阻力矩