, , (. .2.2.).
.2.2. r-L-C .
, ( ) ( ) - :
u(t)= r i(t) +L d i (t)/dt+ 1/C ∫ i(t) dt, (2.31.)
u(t)- , ,
i(t)- , ,
L- ,
r - ,
- .
(r), (L) (C) , . , l=c, L C Q . Q , Q =/r.
(2.31.) :
u(t) = i(t)* {r+ j[Xl + Xc]}. (2.32.)
Z =r+j{XlXc}.
, l=, Z =r, , , , , i(t) = u(t)/r.
(Ỉ), . X Xl c. (Ur), ; (UL), 90 (Uc), 90. :
) (l >). φ (. . 2.3.).
) (l<). φ. . 2.4.
. 2.3 . 2.4
). (L=X). (=XL-Xc) , Z= r, .. . , .. φ=0. .2.5.
|
|
.2.5. .
, .