L , . i (. 4.8) (), .. = B S, H = IW / L.
i , L = W / i .
L , i
.
. 4.8. ()
u = Um sin(ωt + π/2), R ≈ 0, :
u = -e,
Um sin(ωt + π/2) = W d / dt.
,
= Um / (2 π f) W sin(ωt) = m sin(ωt).
:
1. , I, .
2. U m , . ,
e = -W d/dt = -W m ω cos(ωt) = 2 π f W m sin(ωt - π/2),
Em = 2 π f W m,
.
.
E = 4,44 f W m .
. (i) (. 4.9 ) , (). . 4.9 (t).
) )
. 4.9. () (t) (i)
(i) (t), i(t).
i(t) . , , , .
u = -e + L di / dt + R i,
: R ;
L .
|
|
Z = R + Ro + i (x + xo),
: Ro , ;
xo , , ;
R ;
x , ;
Ro xo .
) , ) 4.10.
. 4.10. ) )