Behaviour of Inductor for Ac and Dc Sources

Fundamentals of Electrical Networks Current Voltage Power and Energy Active Elements Independent Sources Passive Elements Inductor Behaviour of Inductor for Ac and Dc Sources Capacitor Source Transformation Rules Impedance & Admittance Star - Delta Transformations

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Behaviour of Inductor for Ac and Dc Sources

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Ideally, the inductors behaves as a short circuit for the dc and behaves as a open circuit for ac. Generally, it allows dc and opposes ac. Figure 1.6 shows the behaviour of the inductor at ideal condition.

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The induced emf is represented in time domain by the equation (14). Similarly, the in frequency domain the induced emf is represented by

$\small v=j\omega Li$ (19)

From (19) $\frac vi=j\omega L=JX_L$ and $X_L=\omega L=2\pi\mathrm{fL}$

Where $X_L$ is the reactance of the inductor measured in ohms and f is the frequency in Hz.

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