Circuit Theory/Phasors/j omega disappears: Difference between revisions

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Latest revision as of 19:45, 29 April 2013

What makes ejω of g(t)=Re(Gmejϕejωt) disappear?

First express voltage and current separately:

v(t)=Re(Vmejϕejωt)
i(t)=Re(Imejϕejωt)

Every voltage in the Loop equations will have the ejω term in it so it can be canceled out.

Vm1ejϕ1ejωt+Vm2ejϕ2ejωt+Vm3ejϕ3ejωt=Vsejϕsejωt
Vm1ejϕ1ejωt+Vm2ejϕ2ejωt+Vm3ejϕ3ejωt=Vsejϕsejωt
Vm1ejϕ1+Vm2ejϕ2+Vm3ejϕ3=Vsejϕs
𝕍m1+𝕍m2+𝕍m3=𝕍s

Every current in the Junction (node) equations will have the ejω term in it so it can be canceled out.

Im1ejϕ1ejωt+Im2ejϕ2ejωt+Im3ejϕ3ejωt=Isejϕsejωt
Im1ejϕ1ejωt+Im2ejϕ2ejωt+Im3ejϕ3ejωt=Isejϕsejωt
Im1ejϕ1+Im2ejϕ2+Im3ejϕ3=Isejϕs
𝕀m1+𝕀m2+𝕀m3=𝕀s

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