a.docx - 2 S ph thuc cc c tnh in theo thi gian t(BNG 7 t(ph...

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2. S ph thu c các đ c tính đi n theo th i gian t (B NG 7) t(ph) 1 2 3 4 5 6 7 8 Umđ(V) 218 218 218 218 218 218 218 218 Uđ(V) 38.1 64 88 118.8 137 142 142.3 142.3 Iđ(A) 2.35 2.1 1.9 1.6 1.4 1.4 1.4 1.4 cos φ 0.38 0.42 0.45 0.57 0.64 0.66 0.66 0.66 Pđ(W) 34 56.4 75.2 108.3 122. 8 131.2 131.4 131.4 Th i gian n đ nh c a đèn là 6 phút 4. S ph thu c các đ c tính đi n theo s tăng c a đi n áp ngu n đ n kho ng 10% Udđ ế (Udđ=220V) (B NG 9) Ung(V) 120.5 140 160 180 200 217 Uđ(V) 120 140.4 99 118 132. 3 143 Id(A) 0.9 1.03 1.05 1.1 1.2 1.35 cos φ 0.13 0.17 0.59 0.65 0.66 0.66 Pđ(V) 14 31 61.3 84 104. 8 127.4 5. S ph thu c các đ c tính đi n áp theo s gi m c a đi n áp ngu n đ n kho ng 10% Udđ ế Ung(V) 217 200 184 Uđ(V) 123 137 184 Id(A) 1.35 1.2 0.9 cos φ 0.66 0.69 0.61 Pđ(W) 109.4 113.4 101 M c đi n áp ngu n 182 V đèn b t đ u t t 6. Bi u di n s thay đ i các đ c tính đi n (Pđ, Uđ, Iđ, cos φ) theo th i gian (theo b ng 7) 0 1 2 0 50 100 150 200 250 38.1 64 218 218 Sự thay U(V)
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0 1 2 0 20 40 60 80 100 120 140 34 56.4 Sự thay đ P(W) 0 1 2 0 0.5 1 1.5 2 2.5 2.35 2.1 Sự thay I(A)
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