Understanding the AC, DC and Peak Currents

We have seen that the ac component (Iac = AI/2) is derivable from the voltseconds law. From the basic inductor equation V = Ldl/dt, we get 

So the current swing Ipp = AI, can be intuitively visualized as voltseconds per unit inductance . If the applied voltseconds doubles, so does the current swing (and ac component). And if the inductance doubles, the swing (and ac component) is halved. 

Let us now consider the dc level again. Note that any capacitor has zero average (dc) current through it in steady-state, so all capacitors can be considered to be missing altogether when 

At ViNMAX, the ac component decreases, dc component decreases even more, and so peak current decreases 

At V NMAX, the ac component increases, dc component remains the same, and so peak current increases 

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