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Network Theorems (AC Circuits) D C Kulshreshtha. Maximum Power Transfer Theorem for AC Circuits Next.

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Presentation on theme: "Network Theorems (AC Circuits) D C Kulshreshtha. Maximum Power Transfer Theorem for AC Circuits Next."— Presentation transcript:

1 Network Theorems (AC Circuits) D C Kulshreshtha

2 Maximum Power Transfer Theorem for AC Circuits Next

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4 The power delivered to the load is Phasor current and voltage are where

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6 A little forethought saves us some work. (X Th + X L ) absorbs no power; any nonzero value only reduces P L. Hence we can put X L = - X Th, so as to get

7 This expression, we have already maximized for purely resistive case, by selecting R L = R Th. Hence, we must have

8 Exercise Show that if the load is purely resistive in an ac circuit, the condition for maximum power transfer is Next


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