Chapter 15 Alternating Current

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Alternating Current A sinusoidal ac waveform starts at zero Increases to a positive maximum Decreases to zero Changes polarity Increases to a negative maximum Returns to zero Variation is called a cycle 3 Generating AC Voltages 4 2
Generating AC Voltages 5 AC Voltage-Current Conventions Assign a reference polarity for source When voltage has a positive value Its polarity is same as reference polarity When voltage is negative Its polarity is opposite that of the reference polarity 6 3
Page 1: Chapter 15 AC Fundamentals Alternat
Page 5 and 6: Frequency Number of cycles per seco
Page 7 and 8: The Basic Sine Wave Equation Voltag
Page 9 and 10: Radian Measure is usually expressed
Page 11 and 12: Voltages and Currents as Functions
Page 13 and 14: Phasors Phasors apply only to sinus
Page 15 and 16: Phase Difference If v 1 = 5 sin(100
Page 17 and 18: Sine Wave Averages Rectified full-w
Page 19 and 20: I eff = .707I m Effective Values V

Chapter 15 Alternating Current

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