Электротехника. Часть 1. Электрические цепи

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  • - ,

    1.

    - 2005

  • 1.

    - 2005

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  • .1.1. 1.

    I = U/z: R = R1; X = 0; z = R1; = artg (X/R) = 0.

    2.

    I = U/z: R =0; X = -xc; xc =1/C; z = xc; = arctg(-) = -/2.

    3.

    I = U/z; R = R; X = xL; xL = L;

    z = RL)(RX 2222 +=+ ;

    = arctg(X/R) = arctg(L /R). 4.

    I=U/z: R=R+R1; X= xL; xL= L;

    z= R1)(RL)(RX 2222 ++=+ ;

    = artg(X/R)= artg(L /R). 5.

    I=U/z: R=R1; X= -xc; xc=1/C;

    z= R1C)(1/RX 2222 +=+ = artg(X/R)= artg(-1 /RC).

    6.

    I=U/z: R=R1+R; X= xL -xc= L -1/C;

    Z= ( ) R1)(R C 1/-LRX 2222 ++=+

    = artg(X/R)= artg[(L -1 /C)/(R+R1). 7.

    I=Uy: g=1/R1; b= -bc; bc = C ;

    y= ( )1/R1C)(bg 222 2+=+ = artg(b/g)= artg (-C R1)

    8.

    I=Uy; y= bg 22+ ; g=g1+g; b=b1+b;

    g1=1/R1; g=R/[ R2+(L)2]; b1=0; b= L /[ R2+(L)2]; = artg(b/g).

    9.

    I=Uy; y= bg 22+ ; g=g1+g; b=b1+b;

    g=R/[ R2+(L)2]; b= L /[ R2+(L)2]; g1=R1/[ R12+(1/C)2]; b1= -1/C [ R12+(1/C)2]; = artg(b/g).

    1 1 R1

    1 1 R L

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    1 1 C R1

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    1 1 C

    1 1 C

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  • 2

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    - , 2.1, - , "1" "1" (.1.1). : R1 = (50 100) , L = (50 110) , C = (0.5 1) .

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    2.1. U= R1= R= L= C=

    f0= Q= f0= Q=

    f,

    I, UR1, U, U, I, UR1, U, U, (f0)

    -

  • , 6 1.1. UR1, U Uc 1.1. Q Q -

    Q=/(R1+R) Q= Uc0/U, = CL - -

    .

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  • 0

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    Q - 2f - I(f), .

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    U = R1 = R = L = C =

    f0= Q= f0= Q=

    f, I, I1, I2, I, I1, I2,

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    1. . 2. . . 3. I(f), UK(f), UC(f), (f) 1 . 4. I(f), I1(f), I2(f), (f) 2 . 5. . 6. .

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    = = U2 / 2f I,

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