1. AC Power Discussion D9.3 Chapter 5

2. Steady-State Power Instantaneous Power Average Power Effective or RMS Values Power Factor Complex Power Residential AC Power Circuits

3. Instantaneous Power Note twice the frequency

4. Average Power Purely resistive circuit Purely reactive circuit

5. Effective or RMS Values We define the effective or rms value of a periodic current (voltage) source to be the dc current (voltage) that delivers the same average power to a resistor. root-mean-square

6. Effective or RMS Values Using and

7. Recall Average Power Power Factor Power factor Power factor angle Note that Thus, an industrial load that consumes P watts with a high PF from a V rms volt line will have lower line losses.

8. Complex Power Real, average power Imaginary, quadrature power

9. Residential Power Systems Read Section 5-8, pages 216 - 219