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dsdlskds3880
16.07.2021 •
Physics
Một động cơ không đồng bộ ba pha có các thông số như sau: Pđm = 10 kW;
Uđm = 220 V; Iđm = 40 A; tần số f = 50 Hz; số cực từ bằng 5; hiệu suất định mức
bằng 0,8; tốc độ định mức bằng 580 vg/ph. Động cơ làm việc ở chế độ định mức có
tổn hao sắt từ bằng 550 W, tổn hao đồng trên dây quấn roto 450 W. Tính:
a) Hệ số công suất định mức và tần số dòng điện roto f2đm của động cơ?
b) Công suất phản kháng động cơ tiêu thụ từ lưới điện?
c) Momen điện từ của động cơ?
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Ответ:
Particles in a gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation: