Transcription of Chapter 31 Alternating Current Circuits
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Chapter 31 Alternating Current Circuits
Chapter 31 Alternating Current CircuitsMFMcGraw-PHY 2426 Chap31-AC Circuits -Revised: 6/24/20122 Alternating Current Circuits Alternating Current - Generator Wave Nomenclature & RMS AC Circuits : Resistor; Inductor; Capacitor Transformers - not the movie LC and RLC Circuits - No generator Driven RLC Circuits - Series Impedance and Power RC and RL Circuits - Low & High Frequency RLC Circuit - Solution via Complex Numbers RLC Circuit - Example ResonanceMFMcGraw-PHY 2426 Chap31-AC Circuits -Revised: 6/24/20123 GeneratorsBy turning the coils in the magnetic field an emf is generated in the coils thus turning mechanical energy into Alternating (AC) 2426 Chap31-AC Circuits -Revised: 6/24/20124 GeneratorsRotating the Coil in a Magnetic Field Generates an Emf Examples: Gasoline generator Manually turning the crank Hydroelectric powerMFMcGraw-PHY 2426 Chap31-AC Circuits -Revised: 6/24/20125 Generatorsmmmpeakpeak = NBAcos = t = NBAcos td= - = NBA sin tdt=sin t; = NBA MFMcGraw-PHY 2426 Chap31-AC Circuits -Revised: 6/24/20126 Wave Nomenclature and RMS ValuesMFMcGraw-PHY 2426 Chap31-AC Circuits -Revised: 6/24/20127 Wave NomenclatureApeak-peak = Ap-p = 2 Apeak = 2Ap; Ap = Ap-p /2 MFMcGraw-PHY 2426 Chap31-AC Circuits -Revised: 6/24/20128 sinx = A t -cos{} sintx = A2 -cosT()() 2 22x = A sin t -x = A sin t cos - sin cos tx = A sin t (0) - (1)cos tx = -Acos tThe minus sign means that the phase is shifted to the right.
Rotating the Coil in a Magnetic Field Generates an Emf • Examples: Gasoline generator • Manually turning the crank • Hydroelectric power. MFMcGraw-PHY 2426 Chap31-AC Circuits-Revised: 6/24/2012 5 Generators m m m peak peak
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