V i d u 1 3 : Cuon day thuan cam c6 he so t u cam L = 636mH mac noi tiep voi
doan mach X.
Dat vao hai dau doan mach h i ^ u d i ^ n the u = 120 \/2 COSIOOTI t(V) t h i
cuong do dong dien qua cuon day la i = 0,6V^cos(1007i t - n /6){A). T i m
hieu dien the hieu dung Ux giira hai dau doan mach X?
A. 120V. B. 240V. C.UOsfzV. D. 60>/2V.
^hdn tich v>d hucmg ddn gidi
Voi dang todn nay tinh gidi theo mdy tinh Id mot buac dot pha vegidi nhanh. Khi tinh theo mdy tinh khong nhimg ta tim dmc hieu dien the hieu dung (cue dai) ma ta con tim duac cd pha cm hop X tif do ta biel dugc trong hop X cd chua phan tu ndo hay la mach c6 tinh cdm khdng hay dung khdng. Day Id phuong phdp gidi cue hay vi the cdc ban cogdng nam dugc nhe!
Truoc tien tinh Zi = 200Q
V o i may F X 5 7 0 E S : Bam [ M Q D E I @ xua't hi^n C M P L X . -Bam: |SHIFTJ \M0DE
man hinh hien thj R . I3
Bam S H I F T M O D E : Cai dat dang toa do de cac: (a + bi).
Bi quye't on luyftt thi dai hqc dat diem tot da Vat It, tap 1 - Le Van Vinh
Nhap mdyO,6sf2 [ • ] ^ H I F T J [ H I BR ]H[ K V G I \Shifi § § Q [ M +
6 (sir d u n g bo nho dpc lap)
Ket qua Id: 169,7 Z - c6 nghia Id: ui =169,7 cos(1007tt+7t/3 )(V)
3
Buoc 2: T i m Ux = u ^ g - U L :
Nhdp mdy: |l2oV2 | [ • ] ^ H I F T J 0 0 0 | R C L | [ M+ ] (goi bp n h o doc lap
SHIFI < I 3 =
u = U„ 170
Chgn dap an A
= 120V.
Vi du 14: Cho mach dien n h u hinh ve:
10""^ 2
C= ^ ( F ) ; L = ^ ( H )
7t 7t
c
M N (B
Biet dat vao hai dau mach dien ap xoay chieu u^g= 200cos(1007it+ —) (V) thi cuong do dongdien trong mach la i = 2 \/2 cos(1007tt)(A); X la doan mach g o m hai trong ba phan t u (Ro, Lo (thuan), Co) mac no'i tiep. Cac phan t u cua hpp X la:
2 10^^ A. Ro=50Q; Co= ^ ^ ^ ^ ( F ) A. Ro=50Q; Co= ^ ^ ^ ^ ( F ) C. Ro=100Q; Co = 10 7t -4 -(F) B. Ro=50Q; Co = D . Ro=50Q; Lo = 10 -4 l.n -(F) 10 -4 -(F)
'Phan tich vd hic&ng ddn gidi
Cach 1 : Truoc tien ti'nh Zi= 200Q ; Zc= lOOQ
Voi may F X 5 7 0 E S : Bam [M0D E| @ xuat hi?n C M P L X . n
Ba'm:pHIFT|^MOD£^l man hinh hien thj R .