Answered

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Cho động cơ một chiều kích từ độc lập có các tham số sau: Pđm=20kW, Uđm=220V, Iđm=100A, nđm=1400 vòng/phút.
Mắc thêm điện trở phụ Rf = 3.
Tính dòng điện mở máy và tốc độ làm việc ổn định của động cơ khi mômen tải
Mc= Mđm.

Sagot :

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