AC Using KVL for RL

Discussion in 'Homework Help' started by davonecuts, Sep 5, 2009.

  1. davonecuts

    Thread Starter New Member

    Sep 5, 2009
    2
    0
    I have been working on this for 2 days Ive tried to do it in polar form and rectangular The loop equation is VmCos(wt-0)=RImSin(wt)+wLImCos(wt)
    When i add them up of course the equal Vm but the problem ask to sovle for VLmax and Vrmax I can use Vin VR + VL but how do u do it with The first loop I presented the givens are R 1000 ohms F=2000hz Vmax =10v L=100mH
    So far i think its Vm/IM=RI+wl
    Vrmax6.2v Vlmax 7.8v Imax 6.2ma
     
  2. Ratch

    New Member

    Mar 20, 2007
    1,068
    3
    davonecuts,

    Looks to me like you got the right answers. What is the problem?

    ω=2∏f = 12566, Xl = jωL = j1257, Z = 1000 + j1257 = 1606/_51.5 , Im = 10/(1606/_51.5) =0.00623/_-51.5 , Vrmax = 1000*Im = 6.23/_-51.5 volts, Vlmax = j1257*Im = 7.83/_38.5 .

    Ratch
     
  3. davonecuts

    Thread Starter New Member

    Sep 5, 2009
    2
    0
    The answers didnt add up to multisim values because they were in RMS. You could also calculate the values in Polar or Rectangular form but they wont work with out a degree or imaginary number.The question wanted the answers with out the phase diff so you would just use Sqrt of x ^2 + y^2 . Duhhh
     
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