Dac diem cau tao: hinh ve

Nguyen li lam viec:

+)Khi khoi dong ta dong khoa k-> Ckd=C1+C2

Khi n=0 -> Mkd max . Khi toc do on dinh -> K mo,dong co tiep tuc lam viec voi 2 day quan(dong co 2 pha)voi tu C2. C2 goi la tu lam viec,tu C2 ung voi tu truong tron'

Khi n=ndm-> M=Mdm

Chu y: (phi) tron trong may dien 2 pha chi ton tai o 1 M nhat dinh va 1 toc do nhat dinh-> cau tao dong co nay khac voi cac dong co khac: Qa=Qb=Q/2

Uu diem: Mmm lon,Mdm lon,cos phi cao. Day la dong co cua hau het tat ca cac loai tu lanh.