Chao cac ban,

Theo minh biet thi thuc te hien nay chung ta khoi dong dong co 3 phase Roto long soc (squirel cage rotor) tuc la dong co khong dong bo, voi cac phuong phap chinh nhu sau:

1) Khoi dong truc tiep vao luoi 220/380Vac :
phu hop dung cho dong co nho hon 10Hp, neu cong suat lon hon se gay sut ap dien luoi

2) Khoi dong bang Sao-Tam giac :
phu hop su dung tu 20Hp tro len den hang tram Hp

3) Khoi dong mem Softstart:
Thay the cho khoi dong Sao-Tam giac va co kha nang that doi thoi gian khoi dong 1 cach chu dong theo dien ap tang dan deu hoac theo hinh chu S (mem hon)

4) Khoi dong bang Bien tan
Dung cho moi cap cong suat dong co, mien la co bien tan, vi motor dung voi bien tan tuc la motor co nhu cau su dung o che do on dinh van toc hoac thay doi van toc theo yeu cau cua may cong nghe hoac TKNL