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270800.62
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( ), , , (. 48). , , . .
f. , f = 1/. (). 1 /, . . , . . , , . 50 , 60 .
, , , . , . . .
, , .
I = Im*sin(ωt + ά)
Im ; ω = 2π/T=2π*f ; ά .
. 50.
1.3.
(50 ) , ( .).
. 54. ( . stator - ) ( . rotor - ). , (0,350,5 ) , . ( ), , , .
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. , , .
, , , . . . ..
(. . 54) . . . . n . , . . . n , . . . :
f = n/60
, p*n . . . . . . :
f = p*n/60
, 50 ( = 1) 3000 / ( ). : , = 40 75. , .
1.4.
, r (. 56, ). u = Um*sinωt :
i = u/r = Um*sinωt/r = Im* sinωt
r , , r, . u i (. 56, ). Im = Um/r, , Im = √2I Um = √2U, :
I = U/r
. r , r = ρ*ℓ/s ( 15), .
( ).
1.5.
, : p = u*i. , , P = U*I.
P = U*I*cosφ
, . cosφ . , . . , : , , . , U = 6 , P = 600 I= 200 .
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cosφ = P/UI = 0,5
sφ = 1 I 100 . - , .
,
,
I = U/ωL
ωL . Ÿ , , [ω] = 1/c, --. ωL , x xL. , , , . L ()
L = 2πfL = ωL.
, , , , ..
- , , . ()
= 1/(2πfC) = 1\(ωC)
, , . , .
I = U/1/ωC
, . 1/ωC XC. , . , .
(. 58, ), , π/2.
1.6. ,
cosφ . : S = UI Q = UI*sinφ = UIp .
S = √P2 + Q2; P = S* cosφ; Q = S* sinφ; Q = P*tgφ.