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:

1. .

2. , . .

3. . , .

4. : , .

 

 

(.1), ( R L) ( ), , u (t) = Um sin wt, :

i (t) = sin (wt - j) = Im sin (wt - j);

i (t) = sin (wt + jc) = Imc sin (wt + jc);

i (t) = i (t) + i (t),

X = - ;

X = wL - ;

Z = - ;

; ; w = 2 pf;

f .

. 1

:

= = = =

= (g j b) = Y = ,

Y = g j b - ;

- ;

- ;

g - , ;

j b - , p /2.

: = = jw = jbc .

=

= [ g j (b bc)] = Y ,

Y = g j (b bc) = ye-jj = y cos j + jy sin j - (.1);

j = arctg - U, , I;

y = - ;

(.2) , . , = U, + I .

.2 , bc > b ( ) j < p /2. - (Ic > I).

 

.2 .3

, . . , . , .1, :

, , j = 0.

.3.

 

 

I = y U = U.

, :

b = b + w 02 L 2 = w 0 C.

. , , L, R w.

f 0 = w 0 / 2 p

f 0= .

, >R. I : I = gU.

. q.

q = .

(t) = u (t) i (t).

, :

P = UI cos j.

P = UIa = U 2 g,

U I ;

j - , ; g - .

, .

S = UI.

, , :

Q = UI sin j.

= Scos j + jS sin j = P + jQ

(.4). : S =

Q = 0. L C . P = S.

, R, L :

C = Ic / 2 pfU = I sin j / 2 pfU,

.4

U I, cos j = 1 (S = P). 0,90,95. cos j , .

C = (P / 2 pfU 2)(tg j - tg j),

P - ;

j - ;

j - .

, DP = I 2 R.

 

, .5. . 0 - , U, V. W , , 1, 2 I, I 1 , I 2 .

.5

1. .

2. , .5.

3. , .

4. U (80100 ) .

5. , : , P = UI. .

6. , 0 Cp (35 ) Cp. . . 1.

7. . 1, 2. , , , . q.

8. . 1 Ic (C), I (C), I (C), cos j = f (C), j = f (C).

9. : , , .

: , I=IL, , R 0.

R ¹ 0, , I I ; I = gU; I = bU (. .2): I =I cos j; I = I sin j = ; cos j = .

, P P.

P = P = UI cos j = UI cos j = UI = gU 2 = RI 2.

(.2):

1. ;

2. j = I e-jj;

3. , p /2;

4. = + .

, , , .

: U, I, P= P.

:

Z = U/ I, R = P/ I 2, X = , L = X / 2 pf, f = 50 .

U, Ic. Xc = U/ Ic, bc = Ic / U.

1

  , U, I, I, I, P, S, Q, cosj y, -1 q , - 1 b, - 1 bc, - 1 xc, q
  1¸9                                    

2

C = Cp
Z R X cos j L g
               

 

1. ?

2. ?

3. ?

4. ?

5. ?

6. ?

7. , ? ?

8. ?

1. / . . . . .: , 1985. . 73-78, 81-88.

2. . ., . . . .: , 1983. . 63-98.

3. . . : .- : , 1976. . 60-67.





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