Impedance & Admittance
Impedance (Z)
Here:
: Resistance : Reactance
Admittance (Y)
Inverse of impedance.
Here:
: Conductance : Susceptance
From the definitions:
For simple circuit elements
Resistor
Let
No changes in frequency, phase angle.
Inductor
Let
Reactance of the inductor is
Capacitor
Let
Reactance of the capacitor (capacitive reactance) is
For complex circuit elements
For a series circuit
Resultant impedance is the sum of each component’s impedance.
For a parallel circuit
Resultant admittance is the sum of each component’s admittance.