Thevenin Equivalent Circuits
The Thevenin equivalent for an ac circuit consists of a phasor voltage source Vt in series with a complex impedance Zt.
The Thévenin voltage is equal to the open-circuit phasor voltage of the original circuit.
Vt = Voc
We can find the Thévenin impedance by zeroing the
independent sources and determining the impedance
looking into the circuit terminals.
The Thévenin impedance equals the open-circuit
voltage divided by the short-circuit current.
Norton Equivalent Circuit
The Norton equivalent for an ac circuit consists of a phasor current source In in parallel with a complex impedance Zt
In = Isc
Sample Problem
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