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Homework Help: Wye - Delta conversion and Mesh Analysis

  1. Sep 19, 2010 #1
    1. The problem statement, all variables and given/known data

    a) Use Y-Δ transformation to simplify the circuit in Figure 2-a to that in Figure 2-b and find the elements and values of Z1, Z2 and Z3

    b) Use mesh analysis for the circuit in Fig. 2-b to calculate I1 and I2

    Here are the circuits.

    http://i1233.photobucket.com/albums/ff390/wklols/c1.png

    2. Relevant equations



    3. The attempt at a solution

    a) I'm not sure what to do to be honest.

    Do I convert the delta to wye form?

    So each 'branch' be equal to (-39j)(-39j)/(-39j-39j-39j)= -12j?

    So now would I have the three branches with -12j and 12j+9Ω= 9Ω ?


    b)

    -240+(4+z2)(i2-i1)+(4+z3)i2=0
    -240+(4+z3)(i1)-(4+z3)(i2-i1)=0

    And that's about all I can do.
     
  2. jcsd
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