Introduction to Electric Circuits, 9th Edition

CHAPTER 11

AC Steady-State Power

IN HIS CHAPTER

11.1 Introduction

11.2 Electric Power

11.3 Instantaneous Power and Average Power

11.4 Effective Value of a Periodic Waveform

11.5 Complex Power

11.6 Power Factor

11.7 The Power Superposition Principle

11.8 The Maximum Power Transfer Theorem

11.9 Coupled Inductors

11.10 The Ideal Transformer

11.11 How Can We Check … ?

11.12 DESIGN EXAMPLE— Maximum Power Transfer

11.13 Summary

Problems

PSpice Problems

Design Problems

11.1 Introduction

In this chapter, we continue our study of ac circuits. In particular, we will see the following:

• The power supplied or received by any element of an ac circuit can be conveniently calculated after representing the circuit in the frequency domain.

  Power in ac circuits is an important topic. Engineers have developed an extensive vocabulary to describe power in an ac circuit. We'll encounter average power, real and reactive power, complex power, the power factor, rms values, and more.

• AC circuits that contain coupled inductors and/or ideal transformers can be conveniently analyzed in the frequency domain.

  Both coupled inductors and ideal transformers consist of magnetically coupled coils. (Coils may be tightly coupled or loosely coupled. The coils of an ideal transformer are perfectly coupled.) After representing coupled inductors and transformers in the frequency domain, we will be able to analyze ac circuits ...